| 1 | /* Generic symbol file reading for the GNU debugger, GDB. |
| 2 | |
| 3 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
| 4 | 1999, 2000, 2001, 2002 Free Software Foundation, Inc. |
| 5 | |
| 6 | Contributed by Cygnus Support, using pieces from other GDB modules. |
| 7 | |
| 8 | This file is part of GDB. |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 2 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program; if not, write to the Free Software |
| 22 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 23 | Boston, MA 02111-1307, USA. */ |
| 24 | |
| 25 | #include "defs.h" |
| 26 | #include "symtab.h" |
| 27 | #include "gdbtypes.h" |
| 28 | #include "gdbcore.h" |
| 29 | #include "frame.h" |
| 30 | #include "target.h" |
| 31 | #include "value.h" |
| 32 | #include "symfile.h" |
| 33 | #include "objfiles.h" |
| 34 | #include "gdbcmd.h" |
| 35 | #include "breakpoint.h" |
| 36 | #include "language.h" |
| 37 | #include "complaints.h" |
| 38 | #include "demangle.h" |
| 39 | #include "inferior.h" /* for write_pc */ |
| 40 | #include "gdb-stabs.h" |
| 41 | #include "obstack.h" |
| 42 | #include "completer.h" |
| 43 | |
| 44 | #include <sys/types.h> |
| 45 | #include <fcntl.h> |
| 46 | #include "gdb_string.h" |
| 47 | #include "gdb_stat.h" |
| 48 | #include <ctype.h> |
| 49 | #include <time.h> |
| 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 | |
| 60 | extern int hp_som_som_object_present; |
| 61 | extern 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 | |
| 68 | int (*ui_load_progress_hook) (const char *section, unsigned long num); |
| 69 | void (*show_load_progress) (const char *section, |
| 70 | unsigned long section_sent, |
| 71 | unsigned long section_size, |
| 72 | unsigned long total_sent, |
| 73 | unsigned long total_size); |
| 74 | void (*pre_add_symbol_hook) (char *); |
| 75 | void (*post_add_symbol_hook) (void); |
| 76 | void (*target_new_objfile_hook) (struct objfile *); |
| 77 | |
| 78 | static void clear_symtab_users_cleanup (void *ignore); |
| 79 | |
| 80 | /* Global variables owned by this file */ |
| 81 | int readnow_symbol_files; /* Read full symbols immediately */ |
| 82 | |
| 83 | struct complaint oldsyms_complaint = |
| 84 | { |
| 85 | "Replacing old symbols for `%s'", 0, 0 |
| 86 | }; |
| 87 | |
| 88 | struct complaint empty_symtab_complaint = |
| 89 | { |
| 90 | "Empty symbol table found for `%s'", 0, 0 |
| 91 | }; |
| 92 | |
| 93 | struct complaint unknown_option_complaint = |
| 94 | { |
| 95 | "Unknown option `%s' ignored", 0, 0 |
| 96 | }; |
| 97 | |
| 98 | /* External variables and functions referenced. */ |
| 99 | |
| 100 | extern void report_transfer_performance (unsigned long, time_t, time_t); |
| 101 | |
| 102 | /* Functions this file defines */ |
| 103 | |
| 104 | #if 0 |
| 105 | static int simple_read_overlay_region_table (void); |
| 106 | static void simple_free_overlay_region_table (void); |
| 107 | #endif |
| 108 | |
| 109 | static void set_initial_language (void); |
| 110 | |
| 111 | static void load_command (char *, int); |
| 112 | |
| 113 | static void symbol_file_add_main_1 (char *args, int from_tty, int flags); |
| 114 | |
| 115 | static void add_symbol_file_command (char *, int); |
| 116 | |
| 117 | static void add_shared_symbol_files_command (char *, int); |
| 118 | |
| 119 | static void cashier_psymtab (struct partial_symtab *); |
| 120 | |
| 121 | bfd *symfile_bfd_open (char *); |
| 122 | |
| 123 | int get_section_index (struct objfile *, char *); |
| 124 | |
| 125 | static void find_sym_fns (struct objfile *); |
| 126 | |
| 127 | static void decrement_reading_symtab (void *); |
| 128 | |
| 129 | static void overlay_invalidate_all (void); |
| 130 | |
| 131 | static int overlay_is_mapped (struct obj_section *); |
| 132 | |
| 133 | void list_overlays_command (char *, int); |
| 134 | |
| 135 | void map_overlay_command (char *, int); |
| 136 | |
| 137 | void unmap_overlay_command (char *, int); |
| 138 | |
| 139 | static void overlay_auto_command (char *, int); |
| 140 | |
| 141 | static void overlay_manual_command (char *, int); |
| 142 | |
| 143 | static void overlay_off_command (char *, int); |
| 144 | |
| 145 | static void overlay_load_command (char *, int); |
| 146 | |
| 147 | static void overlay_command (char *, int); |
| 148 | |
| 149 | static void simple_free_overlay_table (void); |
| 150 | |
| 151 | static void read_target_long_array (CORE_ADDR, unsigned int *, int); |
| 152 | |
| 153 | static int simple_read_overlay_table (void); |
| 154 | |
| 155 | static int simple_overlay_update_1 (struct obj_section *); |
| 156 | |
| 157 | static void add_filename_language (char *ext, enum language lang); |
| 158 | |
| 159 | static void set_ext_lang_command (char *args, int from_tty); |
| 160 | |
| 161 | static void info_ext_lang_command (char *args, int from_tty); |
| 162 | |
| 163 | static void init_filename_language_table (void); |
| 164 | |
| 165 | void _initialize_symfile (void); |
| 166 | |
| 167 | /* List of all available sym_fns. On gdb startup, each object file reader |
| 168 | calls add_symtab_fns() to register information on each format it is |
| 169 | prepared to read. */ |
| 170 | |
| 171 | static struct sym_fns *symtab_fns = NULL; |
| 172 | |
| 173 | /* Flag for whether user will be reloading symbols multiple times. |
| 174 | Defaults to ON for VxWorks, otherwise OFF. */ |
| 175 | |
| 176 | #ifdef SYMBOL_RELOADING_DEFAULT |
| 177 | int symbol_reloading = SYMBOL_RELOADING_DEFAULT; |
| 178 | #else |
| 179 | int symbol_reloading = 0; |
| 180 | #endif |
| 181 | |
| 182 | /* If non-zero, shared library symbols will be added automatically |
| 183 | when the inferior is created, new libraries are loaded, or when |
| 184 | attaching to the inferior. This is almost always what users will |
| 185 | want to have happen; but for very large programs, the startup time |
| 186 | will be excessive, and so if this is a problem, the user can clear |
| 187 | this flag and then add the shared library symbols as needed. Note |
| 188 | that there is a potential for confusion, since if the shared |
| 189 | library symbols are not loaded, commands like "info fun" will *not* |
| 190 | report all the functions that are actually present. */ |
| 191 | |
| 192 | int auto_solib_add = 1; |
| 193 | |
| 194 | /* For systems that support it, a threshold size in megabytes. If |
| 195 | automatically adding a new library's symbol table to those already |
| 196 | known to the debugger would cause the total shared library symbol |
| 197 | size to exceed this threshhold, then the shlib's symbols are not |
| 198 | added. The threshold is ignored if the user explicitly asks for a |
| 199 | shlib to be added, such as when using the "sharedlibrary" |
| 200 | command. */ |
| 201 | |
| 202 | int auto_solib_limit; |
| 203 | \f |
| 204 | |
| 205 | /* Since this function is called from within qsort, in an ANSI environment |
| 206 | it must conform to the prototype for qsort, which specifies that the |
| 207 | comparison function takes two "void *" pointers. */ |
| 208 | |
| 209 | static int |
| 210 | compare_symbols (const void *s1p, const void *s2p) |
| 211 | { |
| 212 | register struct symbol **s1, **s2; |
| 213 | |
| 214 | s1 = (struct symbol **) s1p; |
| 215 | s2 = (struct symbol **) s2p; |
| 216 | return (strcmp (SYMBOL_SOURCE_NAME (*s1), SYMBOL_SOURCE_NAME (*s2))); |
| 217 | } |
| 218 | |
| 219 | /* |
| 220 | |
| 221 | LOCAL FUNCTION |
| 222 | |
| 223 | compare_psymbols -- compare two partial symbols by name |
| 224 | |
| 225 | DESCRIPTION |
| 226 | |
| 227 | Given pointers to pointers to two partial symbol table entries, |
| 228 | compare them by name and return -N, 0, or +N (ala strcmp). |
| 229 | Typically used by sorting routines like qsort(). |
| 230 | |
| 231 | NOTES |
| 232 | |
| 233 | Does direct compare of first two characters before punting |
| 234 | and passing to strcmp for longer compares. Note that the |
| 235 | original version had a bug whereby two null strings or two |
| 236 | identically named one character strings would return the |
| 237 | comparison of memory following the null byte. |
| 238 | |
| 239 | */ |
| 240 | |
| 241 | static int |
| 242 | compare_psymbols (const void *s1p, const void *s2p) |
| 243 | { |
| 244 | register struct partial_symbol **s1, **s2; |
| 245 | register char *st1, *st2; |
| 246 | |
| 247 | s1 = (struct partial_symbol **) s1p; |
| 248 | s2 = (struct partial_symbol **) s2p; |
| 249 | st1 = SYMBOL_SOURCE_NAME (*s1); |
| 250 | st2 = SYMBOL_SOURCE_NAME (*s2); |
| 251 | |
| 252 | |
| 253 | if ((st1[0] - st2[0]) || !st1[0]) |
| 254 | { |
| 255 | return (st1[0] - st2[0]); |
| 256 | } |
| 257 | else if ((st1[1] - st2[1]) || !st1[1]) |
| 258 | { |
| 259 | return (st1[1] - st2[1]); |
| 260 | } |
| 261 | else |
| 262 | { |
| 263 | return (strcmp (st1, st2)); |
| 264 | } |
| 265 | } |
| 266 | |
| 267 | void |
| 268 | sort_pst_symbols (struct partial_symtab *pst) |
| 269 | { |
| 270 | /* Sort the global list; don't sort the static list */ |
| 271 | |
| 272 | qsort (pst->objfile->global_psymbols.list + pst->globals_offset, |
| 273 | pst->n_global_syms, sizeof (struct partial_symbol *), |
| 274 | compare_psymbols); |
| 275 | } |
| 276 | |
| 277 | /* Call sort_block_syms to sort alphabetically the symbols of one block. */ |
| 278 | |
| 279 | void |
| 280 | sort_block_syms (register struct block *b) |
| 281 | { |
| 282 | qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b), |
| 283 | sizeof (struct symbol *), compare_symbols); |
| 284 | } |
| 285 | |
| 286 | /* Call sort_symtab_syms to sort alphabetically |
| 287 | the symbols of each block of one symtab. */ |
| 288 | |
| 289 | void |
| 290 | sort_symtab_syms (register struct symtab *s) |
| 291 | { |
| 292 | register struct blockvector *bv; |
| 293 | int nbl; |
| 294 | int i; |
| 295 | register struct block *b; |
| 296 | |
| 297 | if (s == 0) |
| 298 | return; |
| 299 | bv = BLOCKVECTOR (s); |
| 300 | nbl = BLOCKVECTOR_NBLOCKS (bv); |
| 301 | for (i = 0; i < nbl; i++) |
| 302 | { |
| 303 | b = BLOCKVECTOR_BLOCK (bv, i); |
| 304 | if (BLOCK_SHOULD_SORT (b)) |
| 305 | sort_block_syms (b); |
| 306 | } |
| 307 | } |
| 308 | |
| 309 | /* Make a null terminated copy of the string at PTR with SIZE characters in |
| 310 | the obstack pointed to by OBSTACKP . Returns the address of the copy. |
| 311 | Note that the string at PTR does not have to be null terminated, I.E. it |
| 312 | may be part of a larger string and we are only saving a substring. */ |
| 313 | |
| 314 | char * |
| 315 | obsavestring (char *ptr, int size, struct obstack *obstackp) |
| 316 | { |
| 317 | register char *p = (char *) obstack_alloc (obstackp, size + 1); |
| 318 | /* Open-coded memcpy--saves function call time. These strings are usually |
| 319 | short. FIXME: Is this really still true with a compiler that can |
| 320 | inline memcpy? */ |
| 321 | { |
| 322 | register char *p1 = ptr; |
| 323 | register char *p2 = p; |
| 324 | char *end = ptr + size; |
| 325 | while (p1 != end) |
| 326 | *p2++ = *p1++; |
| 327 | } |
| 328 | p[size] = 0; |
| 329 | return p; |
| 330 | } |
| 331 | |
| 332 | /* Concatenate strings S1, S2 and S3; return the new string. Space is found |
| 333 | in the obstack pointed to by OBSTACKP. */ |
| 334 | |
| 335 | char * |
| 336 | obconcat (struct obstack *obstackp, const char *s1, const char *s2, |
| 337 | const char *s3) |
| 338 | { |
| 339 | register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1; |
| 340 | register char *val = (char *) obstack_alloc (obstackp, len); |
| 341 | strcpy (val, s1); |
| 342 | strcat (val, s2); |
| 343 | strcat (val, s3); |
| 344 | return val; |
| 345 | } |
| 346 | |
| 347 | /* True if we are nested inside psymtab_to_symtab. */ |
| 348 | |
| 349 | int currently_reading_symtab = 0; |
| 350 | |
| 351 | static void |
| 352 | decrement_reading_symtab (void *dummy) |
| 353 | { |
| 354 | currently_reading_symtab--; |
| 355 | } |
| 356 | |
| 357 | /* Get the symbol table that corresponds to a partial_symtab. |
| 358 | This is fast after the first time you do it. In fact, there |
| 359 | is an even faster macro PSYMTAB_TO_SYMTAB that does the fast |
| 360 | case inline. */ |
| 361 | |
| 362 | struct symtab * |
| 363 | psymtab_to_symtab (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 | |
| 383 | void |
| 384 | init_entry_point_info (struct objfile *objfile) |
| 385 | { |
| 386 | /* Save startup file's range of PC addresses to help blockframe.c |
| 387 | decide where the bottom of the stack is. */ |
| 388 | |
| 389 | if (bfd_get_file_flags (objfile->obfd) & EXEC_P) |
| 390 | { |
| 391 | /* Executable file -- record its entry point so we'll recognize |
| 392 | the startup file because it contains the entry point. */ |
| 393 | objfile->ei.entry_point = bfd_get_start_address (objfile->obfd); |
| 394 | } |
| 395 | else |
| 396 | { |
| 397 | /* Examination of non-executable.o files. Short-circuit this stuff. */ |
| 398 | objfile->ei.entry_point = INVALID_ENTRY_POINT; |
| 399 | } |
| 400 | objfile->ei.entry_file_lowpc = INVALID_ENTRY_LOWPC; |
| 401 | objfile->ei.entry_file_highpc = INVALID_ENTRY_HIGHPC; |
| 402 | objfile->ei.entry_func_lowpc = INVALID_ENTRY_LOWPC; |
| 403 | objfile->ei.entry_func_highpc = INVALID_ENTRY_HIGHPC; |
| 404 | objfile->ei.main_func_lowpc = INVALID_ENTRY_LOWPC; |
| 405 | objfile->ei.main_func_highpc = INVALID_ENTRY_HIGHPC; |
| 406 | } |
| 407 | |
| 408 | /* Get current entry point address. */ |
| 409 | |
| 410 | CORE_ADDR |
| 411 | entry_point_address (void) |
| 412 | { |
| 413 | return symfile_objfile ? symfile_objfile->ei.entry_point : 0; |
| 414 | } |
| 415 | |
| 416 | /* Remember the lowest-addressed loadable section we've seen. |
| 417 | This function is called via bfd_map_over_sections. |
| 418 | |
| 419 | In case of equal vmas, the section with the largest size becomes the |
| 420 | lowest-addressed loadable section. |
| 421 | |
| 422 | If the vmas and sizes are equal, the last section is considered the |
| 423 | lowest-addressed loadable section. */ |
| 424 | |
| 425 | void |
| 426 | find_lowest_section (bfd *abfd, asection *sect, PTR obj) |
| 427 | { |
| 428 | asection **lowest = (asection **) obj; |
| 429 | |
| 430 | if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD)) |
| 431 | return; |
| 432 | if (!*lowest) |
| 433 | *lowest = sect; /* First loadable section */ |
| 434 | else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect)) |
| 435 | *lowest = sect; /* A lower loadable section */ |
| 436 | else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect) |
| 437 | && (bfd_section_size (abfd, (*lowest)) |
| 438 | <= bfd_section_size (abfd, sect))) |
| 439 | *lowest = sect; |
| 440 | } |
| 441 | |
| 442 | |
| 443 | /* Build (allocate and populate) a section_addr_info struct from |
| 444 | an existing section table. */ |
| 445 | |
| 446 | extern struct section_addr_info * |
| 447 | build_section_addr_info_from_section_table (const struct section_table *start, |
| 448 | const struct section_table *end) |
| 449 | { |
| 450 | struct section_addr_info *sap; |
| 451 | const struct section_table *stp; |
| 452 | int oidx; |
| 453 | |
| 454 | sap = xmalloc (sizeof (struct section_addr_info)); |
| 455 | memset (sap, 0, sizeof (struct section_addr_info)); |
| 456 | |
| 457 | for (stp = start, oidx = 0; stp != end; stp++) |
| 458 | { |
| 459 | if (bfd_get_section_flags (stp->bfd, |
| 460 | stp->the_bfd_section) & (SEC_ALLOC | SEC_LOAD) |
| 461 | && oidx < MAX_SECTIONS) |
| 462 | { |
| 463 | sap->other[oidx].addr = stp->addr; |
| 464 | sap->other[oidx].name |
| 465 | = xstrdup (bfd_section_name (stp->bfd, stp->the_bfd_section)); |
| 466 | sap->other[oidx].sectindex = stp->the_bfd_section->index; |
| 467 | oidx++; |
| 468 | } |
| 469 | } |
| 470 | |
| 471 | return sap; |
| 472 | } |
| 473 | |
| 474 | |
| 475 | /* Free all memory allocated by build_section_addr_info_from_section_table. */ |
| 476 | |
| 477 | extern void |
| 478 | free_section_addr_info (struct section_addr_info *sap) |
| 479 | { |
| 480 | int idx; |
| 481 | |
| 482 | for (idx = 0; idx < MAX_SECTIONS; idx++) |
| 483 | if (sap->other[idx].name) |
| 484 | xfree (sap->other[idx].name); |
| 485 | xfree (sap); |
| 486 | } |
| 487 | |
| 488 | |
| 489 | /* Parse the user's idea of an offset for dynamic linking, into our idea |
| 490 | of how to represent it for fast symbol reading. This is the default |
| 491 | version of the sym_fns.sym_offsets function for symbol readers that |
| 492 | don't need to do anything special. It allocates a section_offsets table |
| 493 | for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */ |
| 494 | |
| 495 | void |
| 496 | default_symfile_offsets (struct objfile *objfile, |
| 497 | struct section_addr_info *addrs) |
| 498 | { |
| 499 | int i; |
| 500 | asection *sect = NULL; |
| 501 | |
| 502 | objfile->num_sections = SECT_OFF_MAX; |
| 503 | objfile->section_offsets = (struct section_offsets *) |
| 504 | obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS); |
| 505 | memset (objfile->section_offsets, 0, SIZEOF_SECTION_OFFSETS); |
| 506 | |
| 507 | /* Now calculate offsets for section that were specified by the |
| 508 | caller. */ |
| 509 | for (i = 0; i < MAX_SECTIONS && addrs->other[i].name; i++) |
| 510 | { |
| 511 | struct other_sections *osp ; |
| 512 | |
| 513 | osp = &addrs->other[i] ; |
| 514 | if (osp->addr == 0) |
| 515 | continue; |
| 516 | |
| 517 | /* Record all sections in offsets */ |
| 518 | /* The section_offsets in the objfile are here filled in using |
| 519 | the BFD index. */ |
| 520 | (objfile->section_offsets)->offsets[osp->sectindex] = osp->addr; |
| 521 | } |
| 522 | |
| 523 | /* Remember the bfd indexes for the .text, .data, .bss and |
| 524 | .rodata sections. */ |
| 525 | |
| 526 | sect = bfd_get_section_by_name (objfile->obfd, ".text"); |
| 527 | if (sect) |
| 528 | objfile->sect_index_text = sect->index; |
| 529 | |
| 530 | sect = bfd_get_section_by_name (objfile->obfd, ".data"); |
| 531 | if (sect) |
| 532 | objfile->sect_index_data = sect->index; |
| 533 | |
| 534 | sect = bfd_get_section_by_name (objfile->obfd, ".bss"); |
| 535 | if (sect) |
| 536 | objfile->sect_index_bss = sect->index; |
| 537 | |
| 538 | sect = bfd_get_section_by_name (objfile->obfd, ".rodata"); |
| 539 | if (sect) |
| 540 | objfile->sect_index_rodata = sect->index; |
| 541 | |
| 542 | } |
| 543 | |
| 544 | /* Process a symbol file, as either the main file or as a dynamically |
| 545 | loaded file. |
| 546 | |
| 547 | OBJFILE is where the symbols are to be read from. |
| 548 | |
| 549 | ADDR is the address where the text segment was loaded, unless the |
| 550 | objfile is the main symbol file, in which case it is zero. |
| 551 | |
| 552 | MAINLINE is nonzero if this is the main symbol file, or zero if |
| 553 | it's an extra symbol file such as dynamically loaded code. |
| 554 | |
| 555 | VERBO is nonzero if the caller has printed a verbose message about |
| 556 | the symbol reading (and complaints can be more terse about it). */ |
| 557 | |
| 558 | void |
| 559 | syms_from_objfile (struct objfile *objfile, struct section_addr_info *addrs, |
| 560 | int mainline, int verbo) |
| 561 | { |
| 562 | asection *lower_sect; |
| 563 | asection *sect; |
| 564 | CORE_ADDR lower_offset; |
| 565 | struct section_addr_info local_addr; |
| 566 | struct cleanup *old_chain; |
| 567 | int i; |
| 568 | |
| 569 | /* If ADDRS is NULL, initialize the local section_addr_info struct and |
| 570 | point ADDRS to it. We now establish the convention that an addr of |
| 571 | zero means no load address was specified. */ |
| 572 | |
| 573 | if (addrs == NULL) |
| 574 | { |
| 575 | memset (&local_addr, 0, sizeof (local_addr)); |
| 576 | addrs = &local_addr; |
| 577 | } |
| 578 | |
| 579 | init_entry_point_info (objfile); |
| 580 | find_sym_fns (objfile); |
| 581 | |
| 582 | if (objfile->sf == NULL) |
| 583 | return; /* No symbols. */ |
| 584 | |
| 585 | /* Make sure that partially constructed symbol tables will be cleaned up |
| 586 | if an error occurs during symbol reading. */ |
| 587 | old_chain = make_cleanup_free_objfile (objfile); |
| 588 | |
| 589 | if (mainline) |
| 590 | { |
| 591 | /* We will modify the main symbol table, make sure that all its users |
| 592 | will be cleaned up if an error occurs during symbol reading. */ |
| 593 | make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/); |
| 594 | |
| 595 | /* Since no error yet, throw away the old symbol table. */ |
| 596 | |
| 597 | if (symfile_objfile != NULL) |
| 598 | { |
| 599 | free_objfile (symfile_objfile); |
| 600 | symfile_objfile = NULL; |
| 601 | } |
| 602 | |
| 603 | /* Currently we keep symbols from the add-symbol-file command. |
| 604 | If the user wants to get rid of them, they should do "symbol-file" |
| 605 | without arguments first. Not sure this is the best behavior |
| 606 | (PR 2207). */ |
| 607 | |
| 608 | (*objfile->sf->sym_new_init) (objfile); |
| 609 | } |
| 610 | |
| 611 | /* Convert addr into an offset rather than an absolute address. |
| 612 | We find the lowest address of a loaded segment in the objfile, |
| 613 | and assume that <addr> is where that got loaded. |
| 614 | |
| 615 | We no longer warn if the lowest section is not a text segment (as |
| 616 | happens for the PA64 port. */ |
| 617 | if (!mainline) |
| 618 | { |
| 619 | /* Find lowest loadable section to be used as starting point for |
| 620 | continguous sections. FIXME!! won't work without call to find |
| 621 | .text first, but this assumes text is lowest section. */ |
| 622 | lower_sect = bfd_get_section_by_name (objfile->obfd, ".text"); |
| 623 | if (lower_sect == NULL) |
| 624 | bfd_map_over_sections (objfile->obfd, find_lowest_section, |
| 625 | (PTR) &lower_sect); |
| 626 | if (lower_sect == NULL) |
| 627 | warning ("no loadable sections found in added symbol-file %s", |
| 628 | objfile->name); |
| 629 | else |
| 630 | if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE) == 0) |
| 631 | warning ("Lowest section in %s is %s at %s", |
| 632 | objfile->name, |
| 633 | bfd_section_name (objfile->obfd, lower_sect), |
| 634 | paddr (bfd_section_vma (objfile->obfd, lower_sect))); |
| 635 | if (lower_sect != NULL) |
| 636 | lower_offset = bfd_section_vma (objfile->obfd, lower_sect); |
| 637 | else |
| 638 | lower_offset = 0; |
| 639 | |
| 640 | /* Calculate offsets for the loadable sections. |
| 641 | FIXME! Sections must be in order of increasing loadable section |
| 642 | so that contiguous sections can use the lower-offset!!! |
| 643 | |
| 644 | Adjust offsets if the segments are not contiguous. |
| 645 | If the section is contiguous, its offset should be set to |
| 646 | the offset of the highest loadable section lower than it |
| 647 | (the loadable section directly below it in memory). |
| 648 | this_offset = lower_offset = lower_addr - lower_orig_addr */ |
| 649 | |
| 650 | /* Calculate offsets for sections. */ |
| 651 | for (i=0 ; i < MAX_SECTIONS && addrs->other[i].name; i++) |
| 652 | { |
| 653 | if (addrs->other[i].addr != 0) |
| 654 | { |
| 655 | sect = bfd_get_section_by_name (objfile->obfd, addrs->other[i].name); |
| 656 | if (sect) |
| 657 | { |
| 658 | addrs->other[i].addr -= bfd_section_vma (objfile->obfd, sect); |
| 659 | lower_offset = addrs->other[i].addr; |
| 660 | /* This is the index used by BFD. */ |
| 661 | addrs->other[i].sectindex = sect->index ; |
| 662 | } |
| 663 | else |
| 664 | { |
| 665 | warning ("section %s not found in %s", addrs->other[i].name, |
| 666 | objfile->name); |
| 667 | addrs->other[i].addr = 0; |
| 668 | } |
| 669 | } |
| 670 | else |
| 671 | addrs->other[i].addr = lower_offset; |
| 672 | } |
| 673 | } |
| 674 | |
| 675 | /* Initialize symbol reading routines for this objfile, allow complaints to |
| 676 | appear for this new file, and record how verbose to be, then do the |
| 677 | initial symbol reading for this file. */ |
| 678 | |
| 679 | (*objfile->sf->sym_init) (objfile); |
| 680 | clear_complaints (1, verbo); |
| 681 | |
| 682 | (*objfile->sf->sym_offsets) (objfile, addrs); |
| 683 | |
| 684 | #ifndef IBM6000_TARGET |
| 685 | /* This is a SVR4/SunOS specific hack, I think. In any event, it |
| 686 | screws RS/6000. sym_offsets should be doing this sort of thing, |
| 687 | because it knows the mapping between bfd sections and |
| 688 | section_offsets. */ |
| 689 | /* This is a hack. As far as I can tell, section offsets are not |
| 690 | target dependent. They are all set to addr with a couple of |
| 691 | exceptions. The exceptions are sysvr4 shared libraries, whose |
| 692 | offsets are kept in solib structures anyway and rs6000 xcoff |
| 693 | which handles shared libraries in a completely unique way. |
| 694 | |
| 695 | Section offsets are built similarly, except that they are built |
| 696 | by adding addr in all cases because there is no clear mapping |
| 697 | from section_offsets into actual sections. Note that solib.c |
| 698 | has a different algorithm for finding section offsets. |
| 699 | |
| 700 | These should probably all be collapsed into some target |
| 701 | independent form of shared library support. FIXME. */ |
| 702 | |
| 703 | if (addrs) |
| 704 | { |
| 705 | struct obj_section *s; |
| 706 | |
| 707 | /* Map section offsets in "addr" back to the object's |
| 708 | sections by comparing the section names with bfd's |
| 709 | section names. Then adjust the section address by |
| 710 | the offset. */ /* for gdb/13815 */ |
| 711 | |
| 712 | ALL_OBJFILE_OSECTIONS (objfile, s) |
| 713 | { |
| 714 | CORE_ADDR s_addr = 0; |
| 715 | int i; |
| 716 | |
| 717 | for (i = 0; |
| 718 | !s_addr && i < MAX_SECTIONS && addrs->other[i].name; |
| 719 | i++) |
| 720 | if (strcmp (bfd_section_name (s->objfile->obfd, |
| 721 | s->the_bfd_section), |
| 722 | addrs->other[i].name) == 0) |
| 723 | s_addr = addrs->other[i].addr; /* end added for gdb/13815 */ |
| 724 | |
| 725 | s->addr -= s->offset; |
| 726 | s->addr += s_addr; |
| 727 | s->endaddr -= s->offset; |
| 728 | s->endaddr += s_addr; |
| 729 | s->offset += s_addr; |
| 730 | } |
| 731 | } |
| 732 | #endif /* not IBM6000_TARGET */ |
| 733 | |
| 734 | (*objfile->sf->sym_read) (objfile, mainline); |
| 735 | |
| 736 | if (!have_partial_symbols () && !have_full_symbols ()) |
| 737 | { |
| 738 | wrap_here (""); |
| 739 | printf_filtered ("(no debugging symbols found)..."); |
| 740 | wrap_here (""); |
| 741 | } |
| 742 | |
| 743 | /* Don't allow char * to have a typename (else would get caddr_t). |
| 744 | Ditto void *. FIXME: Check whether this is now done by all the |
| 745 | symbol readers themselves (many of them now do), and if so remove |
| 746 | it from here. */ |
| 747 | |
| 748 | TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0; |
| 749 | TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0; |
| 750 | |
| 751 | /* Mark the objfile has having had initial symbol read attempted. Note |
| 752 | that this does not mean we found any symbols... */ |
| 753 | |
| 754 | objfile->flags |= OBJF_SYMS; |
| 755 | |
| 756 | /* Discard cleanups as symbol reading was successful. */ |
| 757 | |
| 758 | discard_cleanups (old_chain); |
| 759 | |
| 760 | /* Call this after reading in a new symbol table to give target |
| 761 | dependent code a crack at the new symbols. For instance, this |
| 762 | could be used to update the values of target-specific symbols GDB |
| 763 | needs to keep track of (such as _sigtramp, or whatever). */ |
| 764 | |
| 765 | TARGET_SYMFILE_POSTREAD (objfile); |
| 766 | } |
| 767 | |
| 768 | /* Perform required actions after either reading in the initial |
| 769 | symbols for a new objfile, or mapping in the symbols from a reusable |
| 770 | objfile. */ |
| 771 | |
| 772 | void |
| 773 | new_symfile_objfile (struct objfile *objfile, int mainline, int verbo) |
| 774 | { |
| 775 | |
| 776 | /* If this is the main symbol file we have to clean up all users of the |
| 777 | old main symbol file. Otherwise it is sufficient to fixup all the |
| 778 | breakpoints that may have been redefined by this symbol file. */ |
| 779 | if (mainline) |
| 780 | { |
| 781 | /* OK, make it the "real" symbol file. */ |
| 782 | symfile_objfile = objfile; |
| 783 | |
| 784 | clear_symtab_users (); |
| 785 | } |
| 786 | else |
| 787 | { |
| 788 | breakpoint_re_set (); |
| 789 | } |
| 790 | |
| 791 | /* We're done reading the symbol file; finish off complaints. */ |
| 792 | clear_complaints (0, verbo); |
| 793 | } |
| 794 | |
| 795 | /* Process a symbol file, as either the main file or as a dynamically |
| 796 | loaded file. |
| 797 | |
| 798 | NAME is the file name (which will be tilde-expanded and made |
| 799 | absolute herein) (but we don't free or modify NAME itself). |
| 800 | FROM_TTY says how verbose to be. MAINLINE specifies whether this |
| 801 | is the main symbol file, or whether it's an extra symbol file such |
| 802 | as dynamically loaded code. If !mainline, ADDR is the address |
| 803 | where the text segment was loaded. |
| 804 | |
| 805 | Upon success, returns a pointer to the objfile that was added. |
| 806 | Upon failure, jumps back to command level (never returns). */ |
| 807 | |
| 808 | struct objfile * |
| 809 | symbol_file_add (char *name, int from_tty, struct section_addr_info *addrs, |
| 810 | int mainline, int flags) |
| 811 | { |
| 812 | struct objfile *objfile; |
| 813 | struct partial_symtab *psymtab; |
| 814 | bfd *abfd; |
| 815 | |
| 816 | /* Open a bfd for the file, and give user a chance to burp if we'd be |
| 817 | interactively wiping out any existing symbols. */ |
| 818 | |
| 819 | abfd = symfile_bfd_open (name); |
| 820 | |
| 821 | if ((have_full_symbols () || have_partial_symbols ()) |
| 822 | && mainline |
| 823 | && from_tty |
| 824 | && !query ("Load new symbol table from \"%s\"? ", name)) |
| 825 | error ("Not confirmed."); |
| 826 | |
| 827 | objfile = allocate_objfile (abfd, flags); |
| 828 | |
| 829 | /* If the objfile uses a mapped symbol file, and we have a psymtab for |
| 830 | it, then skip reading any symbols at this time. */ |
| 831 | |
| 832 | if ((objfile->flags & OBJF_MAPPED) && (objfile->flags & OBJF_SYMS)) |
| 833 | { |
| 834 | /* We mapped in an existing symbol table file that already has had |
| 835 | initial symbol reading performed, so we can skip that part. Notify |
| 836 | the user that instead of reading the symbols, they have been mapped. |
| 837 | */ |
| 838 | if (from_tty || info_verbose) |
| 839 | { |
| 840 | printf_filtered ("Mapped symbols for %s...", name); |
| 841 | wrap_here (""); |
| 842 | gdb_flush (gdb_stdout); |
| 843 | } |
| 844 | init_entry_point_info (objfile); |
| 845 | find_sym_fns (objfile); |
| 846 | } |
| 847 | else |
| 848 | { |
| 849 | /* We either created a new mapped symbol table, mapped an existing |
| 850 | symbol table file which has not had initial symbol reading |
| 851 | performed, or need to read an unmapped symbol table. */ |
| 852 | if (from_tty || info_verbose) |
| 853 | { |
| 854 | if (pre_add_symbol_hook) |
| 855 | pre_add_symbol_hook (name); |
| 856 | else |
| 857 | { |
| 858 | printf_filtered ("Reading symbols from %s...", name); |
| 859 | wrap_here (""); |
| 860 | gdb_flush (gdb_stdout); |
| 861 | } |
| 862 | } |
| 863 | syms_from_objfile (objfile, addrs, mainline, from_tty); |
| 864 | } |
| 865 | |
| 866 | /* We now have at least a partial symbol table. Check to see if the |
| 867 | user requested that all symbols be read on initial access via either |
| 868 | the gdb startup command line or on a per symbol file basis. Expand |
| 869 | all partial symbol tables for this objfile if so. */ |
| 870 | |
| 871 | if ((flags & OBJF_READNOW) || readnow_symbol_files) |
| 872 | { |
| 873 | if (from_tty || info_verbose) |
| 874 | { |
| 875 | printf_filtered ("expanding to full symbols..."); |
| 876 | wrap_here (""); |
| 877 | gdb_flush (gdb_stdout); |
| 878 | } |
| 879 | |
| 880 | for (psymtab = objfile->psymtabs; |
| 881 | psymtab != NULL; |
| 882 | psymtab = psymtab->next) |
| 883 | { |
| 884 | psymtab_to_symtab (psymtab); |
| 885 | } |
| 886 | } |
| 887 | |
| 888 | if (from_tty || info_verbose) |
| 889 | { |
| 890 | if (post_add_symbol_hook) |
| 891 | post_add_symbol_hook (); |
| 892 | else |
| 893 | { |
| 894 | printf_filtered ("done.\n"); |
| 895 | gdb_flush (gdb_stdout); |
| 896 | } |
| 897 | } |
| 898 | |
| 899 | if (objfile->sf == NULL) |
| 900 | return objfile; /* No symbols. */ |
| 901 | |
| 902 | new_symfile_objfile (objfile, mainline, from_tty); |
| 903 | |
| 904 | if (target_new_objfile_hook) |
| 905 | target_new_objfile_hook (objfile); |
| 906 | |
| 907 | return (objfile); |
| 908 | } |
| 909 | |
| 910 | /* Call symbol_file_add() with default values and update whatever is |
| 911 | affected by the loading of a new main(). |
| 912 | Used when the file is supplied in the gdb command line |
| 913 | and by some targets with special loading requirements. |
| 914 | The auxiliary function, symbol_file_add_main_1(), has the flags |
| 915 | argument for the switches that can only be specified in the symbol_file |
| 916 | command itself. */ |
| 917 | |
| 918 | void |
| 919 | symbol_file_add_main (char *args, int from_tty) |
| 920 | { |
| 921 | symbol_file_add_main_1 (args, from_tty, 0); |
| 922 | } |
| 923 | |
| 924 | static void |
| 925 | symbol_file_add_main_1 (char *args, int from_tty, int flags) |
| 926 | { |
| 927 | symbol_file_add (args, from_tty, NULL, 1, flags); |
| 928 | |
| 929 | #ifdef HPUXHPPA |
| 930 | RESET_HP_UX_GLOBALS (); |
| 931 | #endif |
| 932 | |
| 933 | /* Getting new symbols may change our opinion about |
| 934 | what is frameless. */ |
| 935 | reinit_frame_cache (); |
| 936 | |
| 937 | set_initial_language (); |
| 938 | } |
| 939 | |
| 940 | void |
| 941 | symbol_file_clear (int from_tty) |
| 942 | { |
| 943 | if ((have_full_symbols () || have_partial_symbols ()) |
| 944 | && from_tty |
| 945 | && !query ("Discard symbol table from `%s'? ", |
| 946 | symfile_objfile->name)) |
| 947 | error ("Not confirmed."); |
| 948 | free_all_objfiles (); |
| 949 | |
| 950 | /* solib descriptors may have handles to objfiles. Since their |
| 951 | storage has just been released, we'd better wipe the solib |
| 952 | descriptors as well. |
| 953 | */ |
| 954 | #if defined(SOLIB_RESTART) |
| 955 | SOLIB_RESTART (); |
| 956 | #endif |
| 957 | |
| 958 | symfile_objfile = NULL; |
| 959 | if (from_tty) |
| 960 | printf_unfiltered ("No symbol file now.\n"); |
| 961 | #ifdef HPUXHPPA |
| 962 | RESET_HP_UX_GLOBALS (); |
| 963 | #endif |
| 964 | } |
| 965 | |
| 966 | /* This is the symbol-file command. Read the file, analyze its |
| 967 | symbols, and add a struct symtab to a symtab list. The syntax of |
| 968 | the command is rather bizarre--(1) buildargv implements various |
| 969 | quoting conventions which are undocumented and have little or |
| 970 | nothing in common with the way things are quoted (or not quoted) |
| 971 | elsewhere in GDB, (2) options are used, which are not generally |
| 972 | used in GDB (perhaps "set mapped on", "set readnow on" would be |
| 973 | better), (3) the order of options matters, which is contrary to GNU |
| 974 | conventions (because it is confusing and inconvenient). */ |
| 975 | /* Note: ezannoni 2000-04-17. This function used to have support for |
| 976 | rombug (see remote-os9k.c). It consisted of a call to target_link() |
| 977 | (target.c) to get the address of the text segment from the target, |
| 978 | and pass that to symbol_file_add(). This is no longer supported. */ |
| 979 | |
| 980 | void |
| 981 | symbol_file_command (char *args, int from_tty) |
| 982 | { |
| 983 | char **argv; |
| 984 | char *name = NULL; |
| 985 | struct cleanup *cleanups; |
| 986 | int flags = OBJF_USERLOADED; |
| 987 | |
| 988 | dont_repeat (); |
| 989 | |
| 990 | if (args == NULL) |
| 991 | { |
| 992 | symbol_file_clear (from_tty); |
| 993 | } |
| 994 | else |
| 995 | { |
| 996 | if ((argv = buildargv (args)) == NULL) |
| 997 | { |
| 998 | nomem (0); |
| 999 | } |
| 1000 | cleanups = make_cleanup_freeargv (argv); |
| 1001 | while (*argv != NULL) |
| 1002 | { |
| 1003 | if (STREQ (*argv, "-mapped")) |
| 1004 | flags |= OBJF_MAPPED; |
| 1005 | else |
| 1006 | if (STREQ (*argv, "-readnow")) |
| 1007 | flags |= OBJF_READNOW; |
| 1008 | else |
| 1009 | if (**argv == '-') |
| 1010 | error ("unknown option `%s'", *argv); |
| 1011 | else |
| 1012 | { |
| 1013 | name = *argv; |
| 1014 | |
| 1015 | symbol_file_add_main_1 (name, from_tty, flags); |
| 1016 | } |
| 1017 | argv++; |
| 1018 | } |
| 1019 | |
| 1020 | if (name == NULL) |
| 1021 | { |
| 1022 | error ("no symbol file name was specified"); |
| 1023 | } |
| 1024 | do_cleanups (cleanups); |
| 1025 | } |
| 1026 | } |
| 1027 | |
| 1028 | /* Set the initial language. |
| 1029 | |
| 1030 | A better solution would be to record the language in the psymtab when reading |
| 1031 | partial symbols, and then use it (if known) to set the language. This would |
| 1032 | be a win for formats that encode the language in an easily discoverable place, |
| 1033 | such as DWARF. For stabs, we can jump through hoops looking for specially |
| 1034 | named symbols or try to intuit the language from the specific type of stabs |
| 1035 | we find, but we can't do that until later when we read in full symbols. |
| 1036 | FIXME. */ |
| 1037 | |
| 1038 | static void |
| 1039 | set_initial_language (void) |
| 1040 | { |
| 1041 | struct partial_symtab *pst; |
| 1042 | enum language lang = language_unknown; |
| 1043 | |
| 1044 | pst = find_main_psymtab (); |
| 1045 | if (pst != NULL) |
| 1046 | { |
| 1047 | if (pst->filename != NULL) |
| 1048 | { |
| 1049 | lang = deduce_language_from_filename (pst->filename); |
| 1050 | } |
| 1051 | if (lang == language_unknown) |
| 1052 | { |
| 1053 | /* Make C the default language */ |
| 1054 | lang = language_c; |
| 1055 | } |
| 1056 | set_language (lang); |
| 1057 | expected_language = current_language; /* Don't warn the user */ |
| 1058 | } |
| 1059 | } |
| 1060 | |
| 1061 | /* Open file specified by NAME and hand it off to BFD for preliminary |
| 1062 | analysis. Result is a newly initialized bfd *, which includes a newly |
| 1063 | malloc'd` copy of NAME (tilde-expanded and made absolute). |
| 1064 | In case of trouble, error() is called. */ |
| 1065 | |
| 1066 | bfd * |
| 1067 | symfile_bfd_open (char *name) |
| 1068 | { |
| 1069 | bfd *sym_bfd; |
| 1070 | int desc; |
| 1071 | char *absolute_name; |
| 1072 | |
| 1073 | |
| 1074 | |
| 1075 | name = tilde_expand (name); /* Returns 1st new malloc'd copy */ |
| 1076 | |
| 1077 | /* Look down path for it, allocate 2nd new malloc'd copy. */ |
| 1078 | desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name); |
| 1079 | #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__) |
| 1080 | if (desc < 0) |
| 1081 | { |
| 1082 | char *exename = alloca (strlen (name) + 5); |
| 1083 | strcat (strcpy (exename, name), ".exe"); |
| 1084 | desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY, |
| 1085 | 0, &absolute_name); |
| 1086 | } |
| 1087 | #endif |
| 1088 | if (desc < 0) |
| 1089 | { |
| 1090 | make_cleanup (xfree, name); |
| 1091 | perror_with_name (name); |
| 1092 | } |
| 1093 | xfree (name); /* Free 1st new malloc'd copy */ |
| 1094 | name = absolute_name; /* Keep 2nd malloc'd copy in bfd */ |
| 1095 | /* It'll be freed in free_objfile(). */ |
| 1096 | |
| 1097 | sym_bfd = bfd_fdopenr (name, gnutarget, desc); |
| 1098 | if (!sym_bfd) |
| 1099 | { |
| 1100 | close (desc); |
| 1101 | make_cleanup (xfree, name); |
| 1102 | error ("\"%s\": can't open to read symbols: %s.", name, |
| 1103 | bfd_errmsg (bfd_get_error ())); |
| 1104 | } |
| 1105 | sym_bfd->cacheable = 1; |
| 1106 | |
| 1107 | if (!bfd_check_format (sym_bfd, bfd_object)) |
| 1108 | { |
| 1109 | /* FIXME: should be checking for errors from bfd_close (for one thing, |
| 1110 | on error it does not free all the storage associated with the |
| 1111 | bfd). */ |
| 1112 | bfd_close (sym_bfd); /* This also closes desc */ |
| 1113 | make_cleanup (xfree, name); |
| 1114 | error ("\"%s\": can't read symbols: %s.", name, |
| 1115 | bfd_errmsg (bfd_get_error ())); |
| 1116 | } |
| 1117 | return (sym_bfd); |
| 1118 | } |
| 1119 | |
| 1120 | /* Return the section index for the given section name. Return -1 if |
| 1121 | the section was not found. */ |
| 1122 | int |
| 1123 | get_section_index (struct objfile *objfile, char *section_name) |
| 1124 | { |
| 1125 | asection *sect = bfd_get_section_by_name (objfile->obfd, section_name); |
| 1126 | if (sect) |
| 1127 | return sect->index; |
| 1128 | else |
| 1129 | return -1; |
| 1130 | } |
| 1131 | |
| 1132 | /* Link a new symtab_fns into the global symtab_fns list. Called on gdb |
| 1133 | startup by the _initialize routine in each object file format reader, |
| 1134 | to register information about each format the the reader is prepared |
| 1135 | to handle. */ |
| 1136 | |
| 1137 | void |
| 1138 | add_symtab_fns (struct sym_fns *sf) |
| 1139 | { |
| 1140 | sf->next = symtab_fns; |
| 1141 | symtab_fns = sf; |
| 1142 | } |
| 1143 | |
| 1144 | |
| 1145 | /* Initialize to read symbols from the symbol file sym_bfd. It either |
| 1146 | returns or calls error(). The result is an initialized struct sym_fns |
| 1147 | in the objfile structure, that contains cached information about the |
| 1148 | symbol file. */ |
| 1149 | |
| 1150 | static void |
| 1151 | find_sym_fns (struct objfile *objfile) |
| 1152 | { |
| 1153 | struct sym_fns *sf; |
| 1154 | enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd); |
| 1155 | char *our_target = bfd_get_target (objfile->obfd); |
| 1156 | |
| 1157 | if (our_flavour == bfd_target_srec_flavour |
| 1158 | || our_flavour == bfd_target_ihex_flavour |
| 1159 | || our_flavour == bfd_target_tekhex_flavour) |
| 1160 | return; /* No symbols. */ |
| 1161 | |
| 1162 | /* Special kludge for apollo. See dstread.c. */ |
| 1163 | if (STREQN (our_target, "apollo", 6)) |
| 1164 | our_flavour = (enum bfd_flavour) -2; |
| 1165 | |
| 1166 | for (sf = symtab_fns; sf != NULL; sf = sf->next) |
| 1167 | { |
| 1168 | if (our_flavour == sf->sym_flavour) |
| 1169 | { |
| 1170 | objfile->sf = sf; |
| 1171 | return; |
| 1172 | } |
| 1173 | } |
| 1174 | error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.", |
| 1175 | bfd_get_target (objfile->obfd)); |
| 1176 | } |
| 1177 | \f |
| 1178 | /* This function runs the load command of our current target. */ |
| 1179 | |
| 1180 | static void |
| 1181 | load_command (char *arg, int from_tty) |
| 1182 | { |
| 1183 | if (arg == NULL) |
| 1184 | arg = get_exec_file (1); |
| 1185 | target_load (arg, from_tty); |
| 1186 | |
| 1187 | /* After re-loading the executable, we don't really know which |
| 1188 | overlays are mapped any more. */ |
| 1189 | overlay_cache_invalid = 1; |
| 1190 | } |
| 1191 | |
| 1192 | /* This version of "load" should be usable for any target. Currently |
| 1193 | it is just used for remote targets, not inftarg.c or core files, |
| 1194 | on the theory that only in that case is it useful. |
| 1195 | |
| 1196 | Avoiding xmodem and the like seems like a win (a) because we don't have |
| 1197 | to worry about finding it, and (b) On VMS, fork() is very slow and so |
| 1198 | we don't want to run a subprocess. On the other hand, I'm not sure how |
| 1199 | performance compares. */ |
| 1200 | |
| 1201 | static int download_write_size = 512; |
| 1202 | static int validate_download = 0; |
| 1203 | |
| 1204 | /* Callback service function for generic_load (bfd_map_over_sections). */ |
| 1205 | |
| 1206 | static void |
| 1207 | add_section_size_callback (bfd *abfd, asection *asec, void *data) |
| 1208 | { |
| 1209 | bfd_size_type *sum = data; |
| 1210 | |
| 1211 | *sum += bfd_get_section_size_before_reloc (asec); |
| 1212 | } |
| 1213 | |
| 1214 | /* Opaque data for load_section_callback. */ |
| 1215 | struct load_section_data { |
| 1216 | unsigned long load_offset; |
| 1217 | unsigned long write_count; |
| 1218 | unsigned long data_count; |
| 1219 | bfd_size_type total_size; |
| 1220 | }; |
| 1221 | |
| 1222 | /* Callback service function for generic_load (bfd_map_over_sections). */ |
| 1223 | |
| 1224 | static void |
| 1225 | load_section_callback (bfd *abfd, asection *asec, void *data) |
| 1226 | { |
| 1227 | struct load_section_data *args = data; |
| 1228 | |
| 1229 | if (bfd_get_section_flags (abfd, asec) & SEC_LOAD) |
| 1230 | { |
| 1231 | bfd_size_type size = bfd_get_section_size_before_reloc (asec); |
| 1232 | if (size > 0) |
| 1233 | { |
| 1234 | char *buffer; |
| 1235 | struct cleanup *old_chain; |
| 1236 | CORE_ADDR lma = bfd_section_lma (abfd, asec) + args->load_offset; |
| 1237 | bfd_size_type block_size; |
| 1238 | int err; |
| 1239 | const char *sect_name = bfd_get_section_name (abfd, asec); |
| 1240 | bfd_size_type sent; |
| 1241 | |
| 1242 | if (download_write_size > 0 && size > download_write_size) |
| 1243 | block_size = download_write_size; |
| 1244 | else |
| 1245 | block_size = size; |
| 1246 | |
| 1247 | buffer = xmalloc (size); |
| 1248 | old_chain = make_cleanup (xfree, buffer); |
| 1249 | |
| 1250 | /* Is this really necessary? I guess it gives the user something |
| 1251 | to look at during a long download. */ |
| 1252 | ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n", |
| 1253 | sect_name, paddr_nz (size), paddr_nz (lma)); |
| 1254 | |
| 1255 | bfd_get_section_contents (abfd, asec, buffer, 0, size); |
| 1256 | |
| 1257 | sent = 0; |
| 1258 | do |
| 1259 | { |
| 1260 | int len; |
| 1261 | bfd_size_type this_transfer = size - sent; |
| 1262 | |
| 1263 | if (this_transfer >= block_size) |
| 1264 | this_transfer = block_size; |
| 1265 | len = target_write_memory_partial (lma, buffer, |
| 1266 | this_transfer, &err); |
| 1267 | if (err) |
| 1268 | break; |
| 1269 | if (validate_download) |
| 1270 | { |
| 1271 | /* Broken memories and broken monitors manifest |
| 1272 | themselves here when bring new computers to |
| 1273 | life. This doubles already slow downloads. */ |
| 1274 | /* NOTE: cagney/1999-10-18: A more efficient |
| 1275 | implementation might add a verify_memory() |
| 1276 | method to the target vector and then use |
| 1277 | that. remote.c could implement that method |
| 1278 | using the ``qCRC'' packet. */ |
| 1279 | char *check = xmalloc (len); |
| 1280 | struct cleanup *verify_cleanups = |
| 1281 | make_cleanup (xfree, check); |
| 1282 | |
| 1283 | if (target_read_memory (lma, check, len) != 0) |
| 1284 | error ("Download verify read failed at 0x%s", |
| 1285 | paddr (lma)); |
| 1286 | if (memcmp (buffer, check, len) != 0) |
| 1287 | error ("Download verify compare failed at 0x%s", |
| 1288 | paddr (lma)); |
| 1289 | do_cleanups (verify_cleanups); |
| 1290 | } |
| 1291 | args->data_count += len; |
| 1292 | lma += len; |
| 1293 | buffer += len; |
| 1294 | args->write_count += 1; |
| 1295 | sent += len; |
| 1296 | if (quit_flag |
| 1297 | || (ui_load_progress_hook != NULL |
| 1298 | && ui_load_progress_hook (sect_name, sent))) |
| 1299 | error ("Canceled the download"); |
| 1300 | |
| 1301 | if (show_load_progress != NULL) |
| 1302 | show_load_progress (sect_name, sent, size, |
| 1303 | args->data_count, args->total_size); |
| 1304 | } |
| 1305 | while (sent < size); |
| 1306 | |
| 1307 | if (err != 0) |
| 1308 | error ("Memory access error while loading section %s.", sect_name); |
| 1309 | |
| 1310 | do_cleanups (old_chain); |
| 1311 | } |
| 1312 | } |
| 1313 | } |
| 1314 | |
| 1315 | void |
| 1316 | generic_load (char *args, int from_tty) |
| 1317 | { |
| 1318 | asection *s; |
| 1319 | bfd *loadfile_bfd; |
| 1320 | time_t start_time, end_time; /* Start and end times of download */ |
| 1321 | char *filename; |
| 1322 | struct cleanup *old_cleanups; |
| 1323 | char *offptr; |
| 1324 | struct load_section_data cbdata; |
| 1325 | CORE_ADDR entry; |
| 1326 | |
| 1327 | cbdata.load_offset = 0; /* Offset to add to vma for each section. */ |
| 1328 | cbdata.write_count = 0; /* Number of writes needed. */ |
| 1329 | cbdata.data_count = 0; /* Number of bytes written to target memory. */ |
| 1330 | cbdata.total_size = 0; /* Total size of all bfd sectors. */ |
| 1331 | |
| 1332 | /* Parse the input argument - the user can specify a load offset as |
| 1333 | a second argument. */ |
| 1334 | filename = xmalloc (strlen (args) + 1); |
| 1335 | old_cleanups = make_cleanup (xfree, filename); |
| 1336 | strcpy (filename, args); |
| 1337 | offptr = strchr (filename, ' '); |
| 1338 | if (offptr != NULL) |
| 1339 | { |
| 1340 | char *endptr; |
| 1341 | |
| 1342 | cbdata.load_offset = strtoul (offptr, &endptr, 0); |
| 1343 | if (offptr == endptr) |
| 1344 | error ("Invalid download offset:%s\n", offptr); |
| 1345 | *offptr = '\0'; |
| 1346 | } |
| 1347 | else |
| 1348 | cbdata.load_offset = 0; |
| 1349 | |
| 1350 | /* Open the file for loading. */ |
| 1351 | loadfile_bfd = bfd_openr (filename, gnutarget); |
| 1352 | if (loadfile_bfd == NULL) |
| 1353 | { |
| 1354 | perror_with_name (filename); |
| 1355 | return; |
| 1356 | } |
| 1357 | |
| 1358 | /* FIXME: should be checking for errors from bfd_close (for one thing, |
| 1359 | on error it does not free all the storage associated with the |
| 1360 | bfd). */ |
| 1361 | make_cleanup_bfd_close (loadfile_bfd); |
| 1362 | |
| 1363 | if (!bfd_check_format (loadfile_bfd, bfd_object)) |
| 1364 | { |
| 1365 | error ("\"%s\" is not an object file: %s", filename, |
| 1366 | bfd_errmsg (bfd_get_error ())); |
| 1367 | } |
| 1368 | |
| 1369 | bfd_map_over_sections (loadfile_bfd, add_section_size_callback, |
| 1370 | (void *) &cbdata.total_size); |
| 1371 | |
| 1372 | start_time = time (NULL); |
| 1373 | |
| 1374 | bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata); |
| 1375 | |
| 1376 | end_time = time (NULL); |
| 1377 | |
| 1378 | entry = bfd_get_start_address (loadfile_bfd); |
| 1379 | ui_out_text (uiout, "Start address "); |
| 1380 | ui_out_field_fmt (uiout, "address", "0x%s", paddr_nz (entry)); |
| 1381 | ui_out_text (uiout, ", load size "); |
| 1382 | ui_out_field_fmt (uiout, "load-size", "%lu", cbdata.data_count); |
| 1383 | ui_out_text (uiout, "\n"); |
| 1384 | /* We were doing this in remote-mips.c, I suspect it is right |
| 1385 | for other targets too. */ |
| 1386 | write_pc (entry); |
| 1387 | |
| 1388 | /* FIXME: are we supposed to call symbol_file_add or not? According to |
| 1389 | a comment from remote-mips.c (where a call to symbol_file_add was |
| 1390 | commented out), making the call confuses GDB if more than one file is |
| 1391 | loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c |
| 1392 | does. */ |
| 1393 | |
| 1394 | print_transfer_performance (gdb_stdout, cbdata.data_count, |
| 1395 | cbdata.write_count, end_time - start_time); |
| 1396 | |
| 1397 | do_cleanups (old_cleanups); |
| 1398 | } |
| 1399 | |
| 1400 | /* Report how fast the transfer went. */ |
| 1401 | |
| 1402 | /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being |
| 1403 | replaced by print_transfer_performance (with a very different |
| 1404 | function signature). */ |
| 1405 | |
| 1406 | void |
| 1407 | report_transfer_performance (unsigned long data_count, time_t start_time, |
| 1408 | time_t end_time) |
| 1409 | { |
| 1410 | print_transfer_performance (gdb_stdout, data_count, |
| 1411 | end_time - start_time, 0); |
| 1412 | } |
| 1413 | |
| 1414 | void |
| 1415 | print_transfer_performance (struct ui_file *stream, |
| 1416 | unsigned long data_count, |
| 1417 | unsigned long write_count, |
| 1418 | unsigned long time_count) |
| 1419 | { |
| 1420 | ui_out_text (uiout, "Transfer rate: "); |
| 1421 | if (time_count > 0) |
| 1422 | { |
| 1423 | ui_out_field_fmt (uiout, "transfer-rate", "%lu", |
| 1424 | (data_count * 8) / time_count); |
| 1425 | ui_out_text (uiout, " bits/sec"); |
| 1426 | } |
| 1427 | else |
| 1428 | { |
| 1429 | ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8)); |
| 1430 | ui_out_text (uiout, " bits in <1 sec"); |
| 1431 | } |
| 1432 | if (write_count > 0) |
| 1433 | { |
| 1434 | ui_out_text (uiout, ", "); |
| 1435 | ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count); |
| 1436 | ui_out_text (uiout, " bytes/write"); |
| 1437 | } |
| 1438 | ui_out_text (uiout, ".\n"); |
| 1439 | } |
| 1440 | |
| 1441 | /* This function allows the addition of incrementally linked object files. |
| 1442 | It does not modify any state in the target, only in the debugger. */ |
| 1443 | /* Note: ezannoni 2000-04-13 This function/command used to have a |
| 1444 | special case syntax for the rombug target (Rombug is the boot |
| 1445 | monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the |
| 1446 | rombug case, the user doesn't need to supply a text address, |
| 1447 | instead a call to target_link() (in target.c) would supply the |
| 1448 | value to use. We are now discontinuing this type of ad hoc syntax. */ |
| 1449 | |
| 1450 | /* ARGSUSED */ |
| 1451 | static void |
| 1452 | add_symbol_file_command (char *args, int from_tty) |
| 1453 | { |
| 1454 | char *filename = NULL; |
| 1455 | int flags = OBJF_USERLOADED; |
| 1456 | char *arg; |
| 1457 | int expecting_option = 0; |
| 1458 | int section_index = 0; |
| 1459 | int argcnt = 0; |
| 1460 | int sec_num = 0; |
| 1461 | int i; |
| 1462 | int expecting_sec_name = 0; |
| 1463 | int expecting_sec_addr = 0; |
| 1464 | |
| 1465 | struct |
| 1466 | { |
| 1467 | char *name; |
| 1468 | char *value; |
| 1469 | } sect_opts[SECT_OFF_MAX]; |
| 1470 | |
| 1471 | struct section_addr_info section_addrs; |
| 1472 | struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL); |
| 1473 | |
| 1474 | dont_repeat (); |
| 1475 | |
| 1476 | if (args == NULL) |
| 1477 | error ("add-symbol-file takes a file name and an address"); |
| 1478 | |
| 1479 | /* Make a copy of the string that we can safely write into. */ |
| 1480 | args = xstrdup (args); |
| 1481 | |
| 1482 | /* Ensure section_addrs is initialized */ |
| 1483 | memset (§ion_addrs, 0, sizeof (section_addrs)); |
| 1484 | |
| 1485 | while (*args != '\000') |
| 1486 | { |
| 1487 | /* Any leading spaces? */ |
| 1488 | while (isspace (*args)) |
| 1489 | args++; |
| 1490 | |
| 1491 | /* Point arg to the beginning of the argument. */ |
| 1492 | arg = args; |
| 1493 | |
| 1494 | /* Move args pointer over the argument. */ |
| 1495 | while ((*args != '\000') && !isspace (*args)) |
| 1496 | args++; |
| 1497 | |
| 1498 | /* If there are more arguments, terminate arg and |
| 1499 | proceed past it. */ |
| 1500 | if (*args != '\000') |
| 1501 | *args++ = '\000'; |
| 1502 | |
| 1503 | /* Now process the argument. */ |
| 1504 | if (argcnt == 0) |
| 1505 | { |
| 1506 | /* The first argument is the file name. */ |
| 1507 | filename = tilde_expand (arg); |
| 1508 | make_cleanup (xfree, filename); |
| 1509 | } |
| 1510 | else |
| 1511 | if (argcnt == 1) |
| 1512 | { |
| 1513 | /* The second argument is always the text address at which |
| 1514 | to load the program. */ |
| 1515 | sect_opts[section_index].name = ".text"; |
| 1516 | sect_opts[section_index].value = arg; |
| 1517 | section_index++; |
| 1518 | } |
| 1519 | else |
| 1520 | { |
| 1521 | /* It's an option (starting with '-') or it's an argument |
| 1522 | to an option */ |
| 1523 | |
| 1524 | if (*arg == '-') |
| 1525 | { |
| 1526 | if (strcmp (arg, "-mapped") == 0) |
| 1527 | flags |= OBJF_MAPPED; |
| 1528 | else |
| 1529 | if (strcmp (arg, "-readnow") == 0) |
| 1530 | flags |= OBJF_READNOW; |
| 1531 | else |
| 1532 | if (strcmp (arg, "-s") == 0) |
| 1533 | { |
| 1534 | if (section_index >= SECT_OFF_MAX) |
| 1535 | error ("Too many sections specified."); |
| 1536 | expecting_sec_name = 1; |
| 1537 | expecting_sec_addr = 1; |
| 1538 | } |
| 1539 | } |
| 1540 | else |
| 1541 | { |
| 1542 | if (expecting_sec_name) |
| 1543 | { |
| 1544 | sect_opts[section_index].name = arg; |
| 1545 | expecting_sec_name = 0; |
| 1546 | } |
| 1547 | else |
| 1548 | if (expecting_sec_addr) |
| 1549 | { |
| 1550 | sect_opts[section_index].value = arg; |
| 1551 | expecting_sec_addr = 0; |
| 1552 | section_index++; |
| 1553 | } |
| 1554 | else |
| 1555 | error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"); |
| 1556 | } |
| 1557 | } |
| 1558 | argcnt++; |
| 1559 | } |
| 1560 | |
| 1561 | /* Print the prompt for the query below. And save the arguments into |
| 1562 | a sect_addr_info structure to be passed around to other |
| 1563 | functions. We have to split this up into separate print |
| 1564 | statements because local_hex_string returns a local static |
| 1565 | string. */ |
| 1566 | |
| 1567 | printf_filtered ("add symbol table from file \"%s\" at\n", filename); |
| 1568 | for (i = 0; i < section_index; i++) |
| 1569 | { |
| 1570 | CORE_ADDR addr; |
| 1571 | char *val = sect_opts[i].value; |
| 1572 | char *sec = sect_opts[i].name; |
| 1573 | |
| 1574 | val = sect_opts[i].value; |
| 1575 | if (val[0] == '0' && val[1] == 'x') |
| 1576 | addr = strtoul (val+2, NULL, 16); |
| 1577 | else |
| 1578 | addr = strtoul (val, NULL, 10); |
| 1579 | |
| 1580 | /* Here we store the section offsets in the order they were |
| 1581 | entered on the command line. */ |
| 1582 | section_addrs.other[sec_num].name = sec; |
| 1583 | section_addrs.other[sec_num].addr = addr; |
| 1584 | printf_filtered ("\t%s_addr = %s\n", |
| 1585 | sec, |
| 1586 | local_hex_string ((unsigned long)addr)); |
| 1587 | sec_num++; |
| 1588 | |
| 1589 | /* The object's sections are initialized when a |
| 1590 | call is made to build_objfile_section_table (objfile). |
| 1591 | This happens in reread_symbols. |
| 1592 | At this point, we don't know what file type this is, |
| 1593 | so we can't determine what section names are valid. */ |
| 1594 | } |
| 1595 | |
| 1596 | if (from_tty && (!query ("%s", ""))) |
| 1597 | error ("Not confirmed."); |
| 1598 | |
| 1599 | symbol_file_add (filename, from_tty, §ion_addrs, 0, flags); |
| 1600 | |
| 1601 | /* Getting new symbols may change our opinion about what is |
| 1602 | frameless. */ |
| 1603 | reinit_frame_cache (); |
| 1604 | do_cleanups (my_cleanups); |
| 1605 | } |
| 1606 | \f |
| 1607 | static void |
| 1608 | add_shared_symbol_files_command (char *args, int from_tty) |
| 1609 | { |
| 1610 | #ifdef ADD_SHARED_SYMBOL_FILES |
| 1611 | ADD_SHARED_SYMBOL_FILES (args, from_tty); |
| 1612 | #else |
| 1613 | error ("This command is not available in this configuration of GDB."); |
| 1614 | #endif |
| 1615 | } |
| 1616 | \f |
| 1617 | /* Re-read symbols if a symbol-file has changed. */ |
| 1618 | void |
| 1619 | reread_symbols (void) |
| 1620 | { |
| 1621 | struct objfile *objfile; |
| 1622 | long new_modtime; |
| 1623 | int reread_one = 0; |
| 1624 | struct stat new_statbuf; |
| 1625 | int res; |
| 1626 | |
| 1627 | /* With the addition of shared libraries, this should be modified, |
| 1628 | the load time should be saved in the partial symbol tables, since |
| 1629 | different tables may come from different source files. FIXME. |
| 1630 | This routine should then walk down each partial symbol table |
| 1631 | and see if the symbol table that it originates from has been changed */ |
| 1632 | |
| 1633 | for (objfile = object_files; objfile; objfile = objfile->next) |
| 1634 | { |
| 1635 | if (objfile->obfd) |
| 1636 | { |
| 1637 | #ifdef IBM6000_TARGET |
| 1638 | /* If this object is from a shared library, then you should |
| 1639 | stat on the library name, not member name. */ |
| 1640 | |
| 1641 | if (objfile->obfd->my_archive) |
| 1642 | res = stat (objfile->obfd->my_archive->filename, &new_statbuf); |
| 1643 | else |
| 1644 | #endif |
| 1645 | res = stat (objfile->name, &new_statbuf); |
| 1646 | if (res != 0) |
| 1647 | { |
| 1648 | /* FIXME, should use print_sys_errmsg but it's not filtered. */ |
| 1649 | printf_filtered ("`%s' has disappeared; keeping its symbols.\n", |
| 1650 | objfile->name); |
| 1651 | continue; |
| 1652 | } |
| 1653 | new_modtime = new_statbuf.st_mtime; |
| 1654 | if (new_modtime != objfile->mtime) |
| 1655 | { |
| 1656 | struct cleanup *old_cleanups; |
| 1657 | struct section_offsets *offsets; |
| 1658 | int num_offsets; |
| 1659 | char *obfd_filename; |
| 1660 | |
| 1661 | printf_filtered ("`%s' has changed; re-reading symbols.\n", |
| 1662 | objfile->name); |
| 1663 | |
| 1664 | /* There are various functions like symbol_file_add, |
| 1665 | symfile_bfd_open, syms_from_objfile, etc., which might |
| 1666 | appear to do what we want. But they have various other |
| 1667 | effects which we *don't* want. So we just do stuff |
| 1668 | ourselves. We don't worry about mapped files (for one thing, |
| 1669 | any mapped file will be out of date). */ |
| 1670 | |
| 1671 | /* If we get an error, blow away this objfile (not sure if |
| 1672 | that is the correct response for things like shared |
| 1673 | libraries). */ |
| 1674 | old_cleanups = make_cleanup_free_objfile (objfile); |
| 1675 | /* We need to do this whenever any symbols go away. */ |
| 1676 | make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/); |
| 1677 | |
| 1678 | /* Clean up any state BFD has sitting around. We don't need |
| 1679 | to close the descriptor but BFD lacks a way of closing the |
| 1680 | BFD without closing the descriptor. */ |
| 1681 | obfd_filename = bfd_get_filename (objfile->obfd); |
| 1682 | if (!bfd_close (objfile->obfd)) |
| 1683 | error ("Can't close BFD for %s: %s", objfile->name, |
| 1684 | bfd_errmsg (bfd_get_error ())); |
| 1685 | objfile->obfd = bfd_openr (obfd_filename, gnutarget); |
| 1686 | if (objfile->obfd == NULL) |
| 1687 | error ("Can't open %s to read symbols.", objfile->name); |
| 1688 | /* bfd_openr sets cacheable to true, which is what we want. */ |
| 1689 | if (!bfd_check_format (objfile->obfd, bfd_object)) |
| 1690 | error ("Can't read symbols from %s: %s.", objfile->name, |
| 1691 | bfd_errmsg (bfd_get_error ())); |
| 1692 | |
| 1693 | /* Save the offsets, we will nuke them with the rest of the |
| 1694 | psymbol_obstack. */ |
| 1695 | num_offsets = objfile->num_sections; |
| 1696 | offsets = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS); |
| 1697 | memcpy (offsets, objfile->section_offsets, SIZEOF_SECTION_OFFSETS); |
| 1698 | |
| 1699 | /* Nuke all the state that we will re-read. Much of the following |
| 1700 | code which sets things to NULL really is necessary to tell |
| 1701 | other parts of GDB that there is nothing currently there. */ |
| 1702 | |
| 1703 | /* FIXME: Do we have to free a whole linked list, or is this |
| 1704 | enough? */ |
| 1705 | if (objfile->global_psymbols.list) |
| 1706 | xmfree (objfile->md, objfile->global_psymbols.list); |
| 1707 | memset (&objfile->global_psymbols, 0, |
| 1708 | sizeof (objfile->global_psymbols)); |
| 1709 | if (objfile->static_psymbols.list) |
| 1710 | xmfree (objfile->md, objfile->static_psymbols.list); |
| 1711 | memset (&objfile->static_psymbols, 0, |
| 1712 | sizeof (objfile->static_psymbols)); |
| 1713 | |
| 1714 | /* Free the obstacks for non-reusable objfiles */ |
| 1715 | free_bcache (&objfile->psymbol_cache); |
| 1716 | obstack_free (&objfile->psymbol_obstack, 0); |
| 1717 | obstack_free (&objfile->symbol_obstack, 0); |
| 1718 | obstack_free (&objfile->type_obstack, 0); |
| 1719 | objfile->sections = NULL; |
| 1720 | objfile->symtabs = NULL; |
| 1721 | objfile->psymtabs = NULL; |
| 1722 | objfile->free_psymtabs = NULL; |
| 1723 | objfile->msymbols = NULL; |
| 1724 | objfile->minimal_symbol_count = 0; |
| 1725 | memset (&objfile->msymbol_hash, 0, |
| 1726 | sizeof (objfile->msymbol_hash)); |
| 1727 | memset (&objfile->msymbol_demangled_hash, 0, |
| 1728 | sizeof (objfile->msymbol_demangled_hash)); |
| 1729 | objfile->fundamental_types = NULL; |
| 1730 | if (objfile->sf != NULL) |
| 1731 | { |
| 1732 | (*objfile->sf->sym_finish) (objfile); |
| 1733 | } |
| 1734 | |
| 1735 | /* We never make this a mapped file. */ |
| 1736 | objfile->md = NULL; |
| 1737 | /* obstack_specify_allocation also initializes the obstack so |
| 1738 | it is empty. */ |
| 1739 | obstack_specify_allocation (&objfile->psymbol_cache.cache, 0, 0, |
| 1740 | xmalloc, xfree); |
| 1741 | obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0, |
| 1742 | xmalloc, xfree); |
| 1743 | obstack_specify_allocation (&objfile->symbol_obstack, 0, 0, |
| 1744 | xmalloc, xfree); |
| 1745 | obstack_specify_allocation (&objfile->type_obstack, 0, 0, |
| 1746 | xmalloc, xfree); |
| 1747 | if (build_objfile_section_table (objfile)) |
| 1748 | { |
| 1749 | error ("Can't find the file sections in `%s': %s", |
| 1750 | objfile->name, bfd_errmsg (bfd_get_error ())); |
| 1751 | } |
| 1752 | |
| 1753 | /* We use the same section offsets as from last time. I'm not |
| 1754 | sure whether that is always correct for shared libraries. */ |
| 1755 | objfile->section_offsets = (struct section_offsets *) |
| 1756 | obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS); |
| 1757 | memcpy (objfile->section_offsets, offsets, SIZEOF_SECTION_OFFSETS); |
| 1758 | objfile->num_sections = num_offsets; |
| 1759 | |
| 1760 | /* What the hell is sym_new_init for, anyway? The concept of |
| 1761 | distinguishing between the main file and additional files |
| 1762 | in this way seems rather dubious. */ |
| 1763 | if (objfile == symfile_objfile) |
| 1764 | { |
| 1765 | (*objfile->sf->sym_new_init) (objfile); |
| 1766 | #ifdef HPUXHPPA |
| 1767 | RESET_HP_UX_GLOBALS (); |
| 1768 | #endif |
| 1769 | } |
| 1770 | |
| 1771 | (*objfile->sf->sym_init) (objfile); |
| 1772 | clear_complaints (1, 1); |
| 1773 | /* The "mainline" parameter is a hideous hack; I think leaving it |
| 1774 | zero is OK since dbxread.c also does what it needs to do if |
| 1775 | objfile->global_psymbols.size is 0. */ |
| 1776 | (*objfile->sf->sym_read) (objfile, 0); |
| 1777 | if (!have_partial_symbols () && !have_full_symbols ()) |
| 1778 | { |
| 1779 | wrap_here (""); |
| 1780 | printf_filtered ("(no debugging symbols found)\n"); |
| 1781 | wrap_here (""); |
| 1782 | } |
| 1783 | objfile->flags |= OBJF_SYMS; |
| 1784 | |
| 1785 | /* We're done reading the symbol file; finish off complaints. */ |
| 1786 | clear_complaints (0, 1); |
| 1787 | |
| 1788 | /* Getting new symbols may change our opinion about what is |
| 1789 | frameless. */ |
| 1790 | |
| 1791 | reinit_frame_cache (); |
| 1792 | |
| 1793 | /* Discard cleanups as symbol reading was successful. */ |
| 1794 | discard_cleanups (old_cleanups); |
| 1795 | |
| 1796 | /* If the mtime has changed between the time we set new_modtime |
| 1797 | and now, we *want* this to be out of date, so don't call stat |
| 1798 | again now. */ |
| 1799 | objfile->mtime = new_modtime; |
| 1800 | reread_one = 1; |
| 1801 | |
| 1802 | /* Call this after reading in a new symbol table to give target |
| 1803 | dependent code a crack at the new symbols. For instance, this |
| 1804 | could be used to update the values of target-specific symbols GDB |
| 1805 | needs to keep track of (such as _sigtramp, or whatever). */ |
| 1806 | |
| 1807 | TARGET_SYMFILE_POSTREAD (objfile); |
| 1808 | } |
| 1809 | } |
| 1810 | } |
| 1811 | |
| 1812 | if (reread_one) |
| 1813 | clear_symtab_users (); |
| 1814 | } |
| 1815 | \f |
| 1816 | |
| 1817 | |
| 1818 | typedef struct |
| 1819 | { |
| 1820 | char *ext; |
| 1821 | enum language lang; |
| 1822 | } |
| 1823 | filename_language; |
| 1824 | |
| 1825 | static filename_language *filename_language_table; |
| 1826 | static int fl_table_size, fl_table_next; |
| 1827 | |
| 1828 | static void |
| 1829 | add_filename_language (char *ext, enum language lang) |
| 1830 | { |
| 1831 | if (fl_table_next >= fl_table_size) |
| 1832 | { |
| 1833 | fl_table_size += 10; |
| 1834 | filename_language_table = |
| 1835 | xrealloc (filename_language_table, |
| 1836 | fl_table_size * sizeof (*filename_language_table)); |
| 1837 | } |
| 1838 | |
| 1839 | filename_language_table[fl_table_next].ext = xstrdup (ext); |
| 1840 | filename_language_table[fl_table_next].lang = lang; |
| 1841 | fl_table_next++; |
| 1842 | } |
| 1843 | |
| 1844 | static char *ext_args; |
| 1845 | |
| 1846 | static void |
| 1847 | set_ext_lang_command (char *args, int from_tty) |
| 1848 | { |
| 1849 | int i; |
| 1850 | char *cp = ext_args; |
| 1851 | enum language lang; |
| 1852 | |
| 1853 | /* First arg is filename extension, starting with '.' */ |
| 1854 | if (*cp != '.') |
| 1855 | error ("'%s': Filename extension must begin with '.'", ext_args); |
| 1856 | |
| 1857 | /* Find end of first arg. */ |
| 1858 | while (*cp && !isspace (*cp)) |
| 1859 | cp++; |
| 1860 | |
| 1861 | if (*cp == '\0') |
| 1862 | error ("'%s': two arguments required -- filename extension and language", |
| 1863 | ext_args); |
| 1864 | |
| 1865 | /* Null-terminate first arg */ |
| 1866 | *cp++ = '\0'; |
| 1867 | |
| 1868 | /* Find beginning of second arg, which should be a source language. */ |
| 1869 | while (*cp && isspace (*cp)) |
| 1870 | cp++; |
| 1871 | |
| 1872 | if (*cp == '\0') |
| 1873 | error ("'%s': two arguments required -- filename extension and language", |
| 1874 | ext_args); |
| 1875 | |
| 1876 | /* Lookup the language from among those we know. */ |
| 1877 | lang = language_enum (cp); |
| 1878 | |
| 1879 | /* Now lookup the filename extension: do we already know it? */ |
| 1880 | for (i = 0; i < fl_table_next; i++) |
| 1881 | if (0 == strcmp (ext_args, filename_language_table[i].ext)) |
| 1882 | break; |
| 1883 | |
| 1884 | if (i >= fl_table_next) |
| 1885 | { |
| 1886 | /* new file extension */ |
| 1887 | add_filename_language (ext_args, lang); |
| 1888 | } |
| 1889 | else |
| 1890 | { |
| 1891 | /* redefining a previously known filename extension */ |
| 1892 | |
| 1893 | /* if (from_tty) */ |
| 1894 | /* query ("Really make files of type %s '%s'?", */ |
| 1895 | /* ext_args, language_str (lang)); */ |
| 1896 | |
| 1897 | xfree (filename_language_table[i].ext); |
| 1898 | filename_language_table[i].ext = xstrdup (ext_args); |
| 1899 | filename_language_table[i].lang = lang; |
| 1900 | } |
| 1901 | } |
| 1902 | |
| 1903 | static void |
| 1904 | info_ext_lang_command (char *args, int from_tty) |
| 1905 | { |
| 1906 | int i; |
| 1907 | |
| 1908 | printf_filtered ("Filename extensions and the languages they represent:"); |
| 1909 | printf_filtered ("\n\n"); |
| 1910 | for (i = 0; i < fl_table_next; i++) |
| 1911 | printf_filtered ("\t%s\t- %s\n", |
| 1912 | filename_language_table[i].ext, |
| 1913 | language_str (filename_language_table[i].lang)); |
| 1914 | } |
| 1915 | |
| 1916 | static void |
| 1917 | init_filename_language_table (void) |
| 1918 | { |
| 1919 | if (fl_table_size == 0) /* protect against repetition */ |
| 1920 | { |
| 1921 | fl_table_size = 20; |
| 1922 | fl_table_next = 0; |
| 1923 | filename_language_table = |
| 1924 | xmalloc (fl_table_size * sizeof (*filename_language_table)); |
| 1925 | add_filename_language (".c", language_c); |
| 1926 | add_filename_language (".C", language_cplus); |
| 1927 | add_filename_language (".cc", language_cplus); |
| 1928 | add_filename_language (".cp", language_cplus); |
| 1929 | add_filename_language (".cpp", language_cplus); |
| 1930 | add_filename_language (".cxx", language_cplus); |
| 1931 | add_filename_language (".c++", language_cplus); |
| 1932 | add_filename_language (".java", language_java); |
| 1933 | add_filename_language (".class", language_java); |
| 1934 | add_filename_language (".ch", language_chill); |
| 1935 | add_filename_language (".c186", language_chill); |
| 1936 | add_filename_language (".c286", language_chill); |
| 1937 | add_filename_language (".f", language_fortran); |
| 1938 | add_filename_language (".F", language_fortran); |
| 1939 | add_filename_language (".s", language_asm); |
| 1940 | add_filename_language (".S", language_asm); |
| 1941 | add_filename_language (".pas", language_pascal); |
| 1942 | add_filename_language (".p", language_pascal); |
| 1943 | add_filename_language (".pp", language_pascal); |
| 1944 | } |
| 1945 | } |
| 1946 | |
| 1947 | enum language |
| 1948 | deduce_language_from_filename (char *filename) |
| 1949 | { |
| 1950 | int i; |
| 1951 | char *cp; |
| 1952 | |
| 1953 | if (filename != NULL) |
| 1954 | if ((cp = strrchr (filename, '.')) != NULL) |
| 1955 | for (i = 0; i < fl_table_next; i++) |
| 1956 | if (strcmp (cp, filename_language_table[i].ext) == 0) |
| 1957 | return filename_language_table[i].lang; |
| 1958 | |
| 1959 | return language_unknown; |
| 1960 | } |
| 1961 | \f |
| 1962 | /* allocate_symtab: |
| 1963 | |
| 1964 | Allocate and partly initialize a new symbol table. Return a pointer |
| 1965 | to it. error() if no space. |
| 1966 | |
| 1967 | Caller must set these fields: |
| 1968 | LINETABLE(symtab) |
| 1969 | symtab->blockvector |
| 1970 | symtab->dirname |
| 1971 | symtab->free_code |
| 1972 | symtab->free_ptr |
| 1973 | possibly free_named_symtabs (symtab->filename); |
| 1974 | */ |
| 1975 | |
| 1976 | struct symtab * |
| 1977 | allocate_symtab (char *filename, struct objfile *objfile) |
| 1978 | { |
| 1979 | register struct symtab *symtab; |
| 1980 | |
| 1981 | symtab = (struct symtab *) |
| 1982 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct symtab)); |
| 1983 | memset (symtab, 0, sizeof (*symtab)); |
| 1984 | symtab->filename = obsavestring (filename, strlen (filename), |
| 1985 | &objfile->symbol_obstack); |
| 1986 | symtab->fullname = NULL; |
| 1987 | symtab->language = deduce_language_from_filename (filename); |
| 1988 | symtab->debugformat = obsavestring ("unknown", 7, |
| 1989 | &objfile->symbol_obstack); |
| 1990 | |
| 1991 | /* Hook it to the objfile it comes from */ |
| 1992 | |
| 1993 | symtab->objfile = objfile; |
| 1994 | symtab->next = objfile->symtabs; |
| 1995 | objfile->symtabs = symtab; |
| 1996 | |
| 1997 | /* FIXME: This should go away. It is only defined for the Z8000, |
| 1998 | and the Z8000 definition of this macro doesn't have anything to |
| 1999 | do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just |
| 2000 | here for convenience. */ |
| 2001 | #ifdef INIT_EXTRA_SYMTAB_INFO |
| 2002 | INIT_EXTRA_SYMTAB_INFO (symtab); |
| 2003 | #endif |
| 2004 | |
| 2005 | return (symtab); |
| 2006 | } |
| 2007 | |
| 2008 | struct partial_symtab * |
| 2009 | allocate_psymtab (char *filename, struct objfile *objfile) |
| 2010 | { |
| 2011 | struct partial_symtab *psymtab; |
| 2012 | |
| 2013 | if (objfile->free_psymtabs) |
| 2014 | { |
| 2015 | psymtab = objfile->free_psymtabs; |
| 2016 | objfile->free_psymtabs = psymtab->next; |
| 2017 | } |
| 2018 | else |
| 2019 | psymtab = (struct partial_symtab *) |
| 2020 | obstack_alloc (&objfile->psymbol_obstack, |
| 2021 | sizeof (struct partial_symtab)); |
| 2022 | |
| 2023 | memset (psymtab, 0, sizeof (struct partial_symtab)); |
| 2024 | psymtab->filename = obsavestring (filename, strlen (filename), |
| 2025 | &objfile->psymbol_obstack); |
| 2026 | psymtab->symtab = NULL; |
| 2027 | |
| 2028 | /* Prepend it to the psymtab list for the objfile it belongs to. |
| 2029 | Psymtabs are searched in most recent inserted -> least recent |
| 2030 | inserted order. */ |
| 2031 | |
| 2032 | psymtab->objfile = objfile; |
| 2033 | psymtab->next = objfile->psymtabs; |
| 2034 | objfile->psymtabs = psymtab; |
| 2035 | #if 0 |
| 2036 | { |
| 2037 | struct partial_symtab **prev_pst; |
| 2038 | psymtab->objfile = objfile; |
| 2039 | psymtab->next = NULL; |
| 2040 | prev_pst = &(objfile->psymtabs); |
| 2041 | while ((*prev_pst) != NULL) |
| 2042 | prev_pst = &((*prev_pst)->next); |
| 2043 | (*prev_pst) = psymtab; |
| 2044 | } |
| 2045 | #endif |
| 2046 | |
| 2047 | return (psymtab); |
| 2048 | } |
| 2049 | |
| 2050 | void |
| 2051 | discard_psymtab (struct partial_symtab *pst) |
| 2052 | { |
| 2053 | struct partial_symtab **prev_pst; |
| 2054 | |
| 2055 | /* From dbxread.c: |
| 2056 | Empty psymtabs happen as a result of header files which don't |
| 2057 | have any symbols in them. There can be a lot of them. But this |
| 2058 | check is wrong, in that a psymtab with N_SLINE entries but |
| 2059 | nothing else is not empty, but we don't realize that. Fixing |
| 2060 | that without slowing things down might be tricky. */ |
| 2061 | |
| 2062 | /* First, snip it out of the psymtab chain */ |
| 2063 | |
| 2064 | prev_pst = &(pst->objfile->psymtabs); |
| 2065 | while ((*prev_pst) != pst) |
| 2066 | prev_pst = &((*prev_pst)->next); |
| 2067 | (*prev_pst) = pst->next; |
| 2068 | |
| 2069 | /* Next, put it on a free list for recycling */ |
| 2070 | |
| 2071 | pst->next = pst->objfile->free_psymtabs; |
| 2072 | pst->objfile->free_psymtabs = pst; |
| 2073 | } |
| 2074 | \f |
| 2075 | |
| 2076 | /* Reset all data structures in gdb which may contain references to symbol |
| 2077 | table data. */ |
| 2078 | |
| 2079 | void |
| 2080 | clear_symtab_users (void) |
| 2081 | { |
| 2082 | /* Someday, we should do better than this, by only blowing away |
| 2083 | the things that really need to be blown. */ |
| 2084 | clear_value_history (); |
| 2085 | clear_displays (); |
| 2086 | clear_internalvars (); |
| 2087 | breakpoint_re_set (); |
| 2088 | set_default_breakpoint (0, 0, 0, 0); |
| 2089 | current_source_symtab = 0; |
| 2090 | current_source_line = 0; |
| 2091 | clear_pc_function_cache (); |
| 2092 | if (target_new_objfile_hook) |
| 2093 | target_new_objfile_hook (NULL); |
| 2094 | } |
| 2095 | |
| 2096 | static void |
| 2097 | clear_symtab_users_cleanup (void *ignore) |
| 2098 | { |
| 2099 | clear_symtab_users (); |
| 2100 | } |
| 2101 | |
| 2102 | /* clear_symtab_users_once: |
| 2103 | |
| 2104 | This function is run after symbol reading, or from a cleanup. |
| 2105 | If an old symbol table was obsoleted, the old symbol table |
| 2106 | has been blown away, but the other GDB data structures that may |
| 2107 | reference it have not yet been cleared or re-directed. (The old |
| 2108 | symtab was zapped, and the cleanup queued, in free_named_symtab() |
| 2109 | below.) |
| 2110 | |
| 2111 | This function can be queued N times as a cleanup, or called |
| 2112 | directly; it will do all the work the first time, and then will be a |
| 2113 | no-op until the next time it is queued. This works by bumping a |
| 2114 | counter at queueing time. Much later when the cleanup is run, or at |
| 2115 | the end of symbol processing (in case the cleanup is discarded), if |
| 2116 | the queued count is greater than the "done-count", we do the work |
| 2117 | and set the done-count to the queued count. If the queued count is |
| 2118 | less than or equal to the done-count, we just ignore the call. This |
| 2119 | is needed because reading a single .o file will often replace many |
| 2120 | symtabs (one per .h file, for example), and we don't want to reset |
| 2121 | the breakpoints N times in the user's face. |
| 2122 | |
| 2123 | The reason we both queue a cleanup, and call it directly after symbol |
| 2124 | reading, is because the cleanup protects us in case of errors, but is |
| 2125 | discarded if symbol reading is successful. */ |
| 2126 | |
| 2127 | #if 0 |
| 2128 | /* FIXME: As free_named_symtabs is currently a big noop this function |
| 2129 | is no longer needed. */ |
| 2130 | static void clear_symtab_users_once (void); |
| 2131 | |
| 2132 | static int clear_symtab_users_queued; |
| 2133 | static int clear_symtab_users_done; |
| 2134 | |
| 2135 | static void |
| 2136 | clear_symtab_users_once (void) |
| 2137 | { |
| 2138 | /* Enforce once-per-`do_cleanups'-semantics */ |
| 2139 | if (clear_symtab_users_queued <= clear_symtab_users_done) |
| 2140 | return; |
| 2141 | clear_symtab_users_done = clear_symtab_users_queued; |
| 2142 | |
| 2143 | clear_symtab_users (); |
| 2144 | } |
| 2145 | #endif |
| 2146 | |
| 2147 | /* Delete the specified psymtab, and any others that reference it. */ |
| 2148 | |
| 2149 | static void |
| 2150 | cashier_psymtab (struct partial_symtab *pst) |
| 2151 | { |
| 2152 | struct partial_symtab *ps, *pprev = NULL; |
| 2153 | int i; |
| 2154 | |
| 2155 | /* Find its previous psymtab in the chain */ |
| 2156 | for (ps = pst->objfile->psymtabs; ps; ps = ps->next) |
| 2157 | { |
| 2158 | if (ps == pst) |
| 2159 | break; |
| 2160 | pprev = ps; |
| 2161 | } |
| 2162 | |
| 2163 | if (ps) |
| 2164 | { |
| 2165 | /* Unhook it from the chain. */ |
| 2166 | if (ps == pst->objfile->psymtabs) |
| 2167 | pst->objfile->psymtabs = ps->next; |
| 2168 | else |
| 2169 | pprev->next = ps->next; |
| 2170 | |
| 2171 | /* FIXME, we can't conveniently deallocate the entries in the |
| 2172 | partial_symbol lists (global_psymbols/static_psymbols) that |
| 2173 | this psymtab points to. These just take up space until all |
| 2174 | the psymtabs are reclaimed. Ditto the dependencies list and |
| 2175 | filename, which are all in the psymbol_obstack. */ |
| 2176 | |
| 2177 | /* We need to cashier any psymtab that has this one as a dependency... */ |
| 2178 | again: |
| 2179 | for (ps = pst->objfile->psymtabs; ps; ps = ps->next) |
| 2180 | { |
| 2181 | for (i = 0; i < ps->number_of_dependencies; i++) |
| 2182 | { |
| 2183 | if (ps->dependencies[i] == pst) |
| 2184 | { |
| 2185 | cashier_psymtab (ps); |
| 2186 | goto again; /* Must restart, chain has been munged. */ |
| 2187 | } |
| 2188 | } |
| 2189 | } |
| 2190 | } |
| 2191 | } |
| 2192 | |
| 2193 | /* If a symtab or psymtab for filename NAME is found, free it along |
| 2194 | with any dependent breakpoints, displays, etc. |
| 2195 | Used when loading new versions of object modules with the "add-file" |
| 2196 | command. This is only called on the top-level symtab or psymtab's name; |
| 2197 | it is not called for subsidiary files such as .h files. |
| 2198 | |
| 2199 | Return value is 1 if we blew away the environment, 0 if not. |
| 2200 | FIXME. The return value appears to never be used. |
| 2201 | |
| 2202 | FIXME. I think this is not the best way to do this. We should |
| 2203 | work on being gentler to the environment while still cleaning up |
| 2204 | all stray pointers into the freed symtab. */ |
| 2205 | |
| 2206 | int |
| 2207 | free_named_symtabs (char *name) |
| 2208 | { |
| 2209 | #if 0 |
| 2210 | /* FIXME: With the new method of each objfile having it's own |
| 2211 | psymtab list, this function needs serious rethinking. In particular, |
| 2212 | why was it ever necessary to toss psymtabs with specific compilation |
| 2213 | unit filenames, as opposed to all psymtabs from a particular symbol |
| 2214 | file? -- fnf |
| 2215 | Well, the answer is that some systems permit reloading of particular |
| 2216 | compilation units. We want to blow away any old info about these |
| 2217 | compilation units, regardless of which objfiles they arrived in. --gnu. */ |
| 2218 | |
| 2219 | register struct symtab *s; |
| 2220 | register struct symtab *prev; |
| 2221 | register struct partial_symtab *ps; |
| 2222 | struct blockvector *bv; |
| 2223 | int blewit = 0; |
| 2224 | |
| 2225 | /* We only wack things if the symbol-reload switch is set. */ |
| 2226 | if (!symbol_reloading) |
| 2227 | return 0; |
| 2228 | |
| 2229 | /* Some symbol formats have trouble providing file names... */ |
| 2230 | if (name == 0 || *name == '\0') |
| 2231 | return 0; |
| 2232 | |
| 2233 | /* Look for a psymtab with the specified name. */ |
| 2234 | |
| 2235 | again2: |
| 2236 | for (ps = partial_symtab_list; ps; ps = ps->next) |
| 2237 | { |
| 2238 | if (STREQ (name, ps->filename)) |
| 2239 | { |
| 2240 | cashier_psymtab (ps); /* Blow it away...and its little dog, too. */ |
| 2241 | goto again2; /* Must restart, chain has been munged */ |
| 2242 | } |
| 2243 | } |
| 2244 | |
| 2245 | /* Look for a symtab with the specified name. */ |
| 2246 | |
| 2247 | for (s = symtab_list; s; s = s->next) |
| 2248 | { |
| 2249 | if (STREQ (name, s->filename)) |
| 2250 | break; |
| 2251 | prev = s; |
| 2252 | } |
| 2253 | |
| 2254 | if (s) |
| 2255 | { |
| 2256 | if (s == symtab_list) |
| 2257 | symtab_list = s->next; |
| 2258 | else |
| 2259 | prev->next = s->next; |
| 2260 | |
| 2261 | /* For now, queue a delete for all breakpoints, displays, etc., whether |
| 2262 | or not they depend on the symtab being freed. This should be |
| 2263 | changed so that only those data structures affected are deleted. */ |
| 2264 | |
| 2265 | /* But don't delete anything if the symtab is empty. |
| 2266 | This test is necessary due to a bug in "dbxread.c" that |
| 2267 | causes empty symtabs to be created for N_SO symbols that |
| 2268 | contain the pathname of the object file. (This problem |
| 2269 | has been fixed in GDB 3.9x). */ |
| 2270 | |
| 2271 | bv = BLOCKVECTOR (s); |
| 2272 | if (BLOCKVECTOR_NBLOCKS (bv) > 2 |
| 2273 | || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) |
| 2274 | || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK))) |
| 2275 | { |
| 2276 | complain (&oldsyms_complaint, name); |
| 2277 | |
| 2278 | clear_symtab_users_queued++; |
| 2279 | make_cleanup (clear_symtab_users_once, 0); |
| 2280 | blewit = 1; |
| 2281 | } |
| 2282 | else |
| 2283 | { |
| 2284 | complain (&empty_symtab_complaint, name); |
| 2285 | } |
| 2286 | |
| 2287 | free_symtab (s); |
| 2288 | } |
| 2289 | else |
| 2290 | { |
| 2291 | /* It is still possible that some breakpoints will be affected |
| 2292 | even though no symtab was found, since the file might have |
| 2293 | been compiled without debugging, and hence not be associated |
| 2294 | with a symtab. In order to handle this correctly, we would need |
| 2295 | to keep a list of text address ranges for undebuggable files. |
| 2296 | For now, we do nothing, since this is a fairly obscure case. */ |
| 2297 | ; |
| 2298 | } |
| 2299 | |
| 2300 | /* FIXME, what about the minimal symbol table? */ |
| 2301 | return blewit; |
| 2302 | #else |
| 2303 | return (0); |
| 2304 | #endif |
| 2305 | } |
| 2306 | \f |
| 2307 | /* Allocate and partially fill a partial symtab. It will be |
| 2308 | completely filled at the end of the symbol list. |
| 2309 | |
| 2310 | FILENAME is the name of the symbol-file we are reading from. */ |
| 2311 | |
| 2312 | struct partial_symtab * |
| 2313 | start_psymtab_common (struct objfile *objfile, |
| 2314 | struct section_offsets *section_offsets, char *filename, |
| 2315 | CORE_ADDR textlow, struct partial_symbol **global_syms, |
| 2316 | struct partial_symbol **static_syms) |
| 2317 | { |
| 2318 | struct partial_symtab *psymtab; |
| 2319 | |
| 2320 | psymtab = allocate_psymtab (filename, objfile); |
| 2321 | psymtab->section_offsets = section_offsets; |
| 2322 | psymtab->textlow = textlow; |
| 2323 | psymtab->texthigh = psymtab->textlow; /* default */ |
| 2324 | psymtab->globals_offset = global_syms - objfile->global_psymbols.list; |
| 2325 | psymtab->statics_offset = static_syms - objfile->static_psymbols.list; |
| 2326 | return (psymtab); |
| 2327 | } |
| 2328 | \f |
| 2329 | /* Add a symbol with a long value to a psymtab. |
| 2330 | Since one arg is a struct, we pass in a ptr and deref it (sigh). */ |
| 2331 | |
| 2332 | void |
| 2333 | add_psymbol_to_list (char *name, int namelength, namespace_enum namespace, |
| 2334 | enum address_class class, |
| 2335 | struct psymbol_allocation_list *list, long val, /* Value as a long */ |
| 2336 | CORE_ADDR coreaddr, /* Value as a CORE_ADDR */ |
| 2337 | enum language language, struct objfile *objfile) |
| 2338 | { |
| 2339 | register struct partial_symbol *psym; |
| 2340 | char *buf = alloca (namelength + 1); |
| 2341 | /* psymbol is static so that there will be no uninitialized gaps in the |
| 2342 | structure which might contain random data, causing cache misses in |
| 2343 | bcache. */ |
| 2344 | static struct partial_symbol psymbol; |
| 2345 | |
| 2346 | /* Create local copy of the partial symbol */ |
| 2347 | memcpy (buf, name, namelength); |
| 2348 | buf[namelength] = '\0'; |
| 2349 | SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache); |
| 2350 | /* val and coreaddr are mutually exclusive, one of them *will* be zero */ |
| 2351 | if (val != 0) |
| 2352 | { |
| 2353 | SYMBOL_VALUE (&psymbol) = val; |
| 2354 | } |
| 2355 | else |
| 2356 | { |
| 2357 | SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr; |
| 2358 | } |
| 2359 | SYMBOL_SECTION (&psymbol) = 0; |
| 2360 | SYMBOL_LANGUAGE (&psymbol) = language; |
| 2361 | PSYMBOL_NAMESPACE (&psymbol) = namespace; |
| 2362 | PSYMBOL_CLASS (&psymbol) = class; |
| 2363 | SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language); |
| 2364 | |
| 2365 | /* Stash the partial symbol away in the cache */ |
| 2366 | psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache); |
| 2367 | |
| 2368 | /* Save pointer to partial symbol in psymtab, growing symtab if needed. */ |
| 2369 | if (list->next >= list->list + list->size) |
| 2370 | { |
| 2371 | extend_psymbol_list (list, objfile); |
| 2372 | } |
| 2373 | *list->next++ = psym; |
| 2374 | OBJSTAT (objfile, n_psyms++); |
| 2375 | } |
| 2376 | |
| 2377 | /* Add a symbol with a long value to a psymtab. This differs from |
| 2378 | * add_psymbol_to_list above in taking both a mangled and a demangled |
| 2379 | * name. */ |
| 2380 | |
| 2381 | void |
| 2382 | add_psymbol_with_dem_name_to_list (char *name, int namelength, char *dem_name, |
| 2383 | int dem_namelength, namespace_enum namespace, |
| 2384 | enum address_class class, |
| 2385 | struct psymbol_allocation_list *list, long val, /* Value as a long */ |
| 2386 | CORE_ADDR coreaddr, /* Value as a CORE_ADDR */ |
| 2387 | enum language language, |
| 2388 | struct objfile *objfile) |
| 2389 | { |
| 2390 | register struct partial_symbol *psym; |
| 2391 | char *buf = alloca (namelength + 1); |
| 2392 | /* psymbol is static so that there will be no uninitialized gaps in the |
| 2393 | structure which might contain random data, causing cache misses in |
| 2394 | bcache. */ |
| 2395 | static struct partial_symbol psymbol; |
| 2396 | |
| 2397 | /* Create local copy of the partial symbol */ |
| 2398 | |
| 2399 | memcpy (buf, name, namelength); |
| 2400 | buf[namelength] = '\0'; |
| 2401 | SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache); |
| 2402 | |
| 2403 | buf = alloca (dem_namelength + 1); |
| 2404 | memcpy (buf, dem_name, dem_namelength); |
| 2405 | buf[dem_namelength] = '\0'; |
| 2406 | |
| 2407 | switch (language) |
| 2408 | { |
| 2409 | case language_c: |
| 2410 | case language_cplus: |
| 2411 | SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) = |
| 2412 | bcache (buf, dem_namelength + 1, &objfile->psymbol_cache); |
| 2413 | break; |
| 2414 | case language_chill: |
| 2415 | SYMBOL_CHILL_DEMANGLED_NAME (&psymbol) = |
| 2416 | bcache (buf, dem_namelength + 1, &objfile->psymbol_cache); |
| 2417 | |
| 2418 | /* FIXME What should be done for the default case? Ignoring for now. */ |
| 2419 | } |
| 2420 | |
| 2421 | /* val and coreaddr are mutually exclusive, one of them *will* be zero */ |
| 2422 | if (val != 0) |
| 2423 | { |
| 2424 | SYMBOL_VALUE (&psymbol) = val; |
| 2425 | } |
| 2426 | else |
| 2427 | { |
| 2428 | SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr; |
| 2429 | } |
| 2430 | SYMBOL_SECTION (&psymbol) = 0; |
| 2431 | SYMBOL_LANGUAGE (&psymbol) = language; |
| 2432 | PSYMBOL_NAMESPACE (&psymbol) = namespace; |
| 2433 | PSYMBOL_CLASS (&psymbol) = class; |
| 2434 | SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language); |
| 2435 | |
| 2436 | /* Stash the partial symbol away in the cache */ |
| 2437 | psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache); |
| 2438 | |
| 2439 | /* Save pointer to partial symbol in psymtab, growing symtab if needed. */ |
| 2440 | if (list->next >= list->list + list->size) |
| 2441 | { |
| 2442 | extend_psymbol_list (list, objfile); |
| 2443 | } |
| 2444 | *list->next++ = psym; |
| 2445 | OBJSTAT (objfile, n_psyms++); |
| 2446 | } |
| 2447 | |
| 2448 | /* Initialize storage for partial symbols. */ |
| 2449 | |
| 2450 | void |
| 2451 | init_psymbol_list (struct objfile *objfile, int total_symbols) |
| 2452 | { |
| 2453 | /* Free any previously allocated psymbol lists. */ |
| 2454 | |
| 2455 | if (objfile->global_psymbols.list) |
| 2456 | { |
| 2457 | xmfree (objfile->md, (PTR) objfile->global_psymbols.list); |
| 2458 | } |
| 2459 | if (objfile->static_psymbols.list) |
| 2460 | { |
| 2461 | xmfree (objfile->md, (PTR) objfile->static_psymbols.list); |
| 2462 | } |
| 2463 | |
| 2464 | /* Current best guess is that approximately a twentieth |
| 2465 | of the total symbols (in a debugging file) are global or static |
| 2466 | oriented symbols */ |
| 2467 | |
| 2468 | objfile->global_psymbols.size = total_symbols / 10; |
| 2469 | objfile->static_psymbols.size = total_symbols / 10; |
| 2470 | |
| 2471 | if (objfile->global_psymbols.size > 0) |
| 2472 | { |
| 2473 | objfile->global_psymbols.next = |
| 2474 | objfile->global_psymbols.list = (struct partial_symbol **) |
| 2475 | xmmalloc (objfile->md, (objfile->global_psymbols.size |
| 2476 | * sizeof (struct partial_symbol *))); |
| 2477 | } |
| 2478 | if (objfile->static_psymbols.size > 0) |
| 2479 | { |
| 2480 | objfile->static_psymbols.next = |
| 2481 | objfile->static_psymbols.list = (struct partial_symbol **) |
| 2482 | xmmalloc (objfile->md, (objfile->static_psymbols.size |
| 2483 | * sizeof (struct partial_symbol *))); |
| 2484 | } |
| 2485 | } |
| 2486 | |
| 2487 | /* OVERLAYS: |
| 2488 | The following code implements an abstraction for debugging overlay sections. |
| 2489 | |
| 2490 | The target model is as follows: |
| 2491 | 1) The gnu linker will permit multiple sections to be mapped into the |
| 2492 | same VMA, each with its own unique LMA (or load address). |
| 2493 | 2) It is assumed that some runtime mechanism exists for mapping the |
| 2494 | sections, one by one, from the load address into the VMA address. |
| 2495 | 3) This code provides a mechanism for gdb to keep track of which |
| 2496 | sections should be considered to be mapped from the VMA to the LMA. |
| 2497 | This information is used for symbol lookup, and memory read/write. |
| 2498 | For instance, if a section has been mapped then its contents |
| 2499 | should be read from the VMA, otherwise from the LMA. |
| 2500 | |
| 2501 | Two levels of debugger support for overlays are available. One is |
| 2502 | "manual", in which the debugger relies on the user to tell it which |
| 2503 | overlays are currently mapped. This level of support is |
| 2504 | implemented entirely in the core debugger, and the information about |
| 2505 | whether a section is mapped is kept in the objfile->obj_section table. |
| 2506 | |
| 2507 | The second level of support is "automatic", and is only available if |
| 2508 | the target-specific code provides functionality to read the target's |
| 2509 | overlay mapping table, and translate its contents for the debugger |
| 2510 | (by updating the mapped state information in the obj_section tables). |
| 2511 | |
| 2512 | The interface is as follows: |
| 2513 | User commands: |
| 2514 | overlay map <name> -- tell gdb to consider this section mapped |
| 2515 | overlay unmap <name> -- tell gdb to consider this section unmapped |
| 2516 | overlay list -- list the sections that GDB thinks are mapped |
| 2517 | overlay read-target -- get the target's state of what's mapped |
| 2518 | overlay off/manual/auto -- set overlay debugging state |
| 2519 | Functional interface: |
| 2520 | find_pc_mapped_section(pc): if the pc is in the range of a mapped |
| 2521 | section, return that section. |
| 2522 | find_pc_overlay(pc): find any overlay section that contains |
| 2523 | the pc, either in its VMA or its LMA |
| 2524 | overlay_is_mapped(sect): true if overlay is marked as mapped |
| 2525 | section_is_overlay(sect): true if section's VMA != LMA |
| 2526 | pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA |
| 2527 | pc_in_unmapped_range(...): true if pc belongs to section's LMA |
| 2528 | sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap |
| 2529 | overlay_mapped_address(...): map an address from section's LMA to VMA |
| 2530 | overlay_unmapped_address(...): map an address from section's VMA to LMA |
| 2531 | symbol_overlayed_address(...): Return a "current" address for symbol: |
| 2532 | either in VMA or LMA depending on whether |
| 2533 | the symbol's section is currently mapped |
| 2534 | */ |
| 2535 | |
| 2536 | /* Overlay debugging state: */ |
| 2537 | |
| 2538 | enum overlay_debugging_state overlay_debugging = ovly_off; |
| 2539 | int overlay_cache_invalid = 0; /* True if need to refresh mapped state */ |
| 2540 | |
| 2541 | /* Target vector for refreshing overlay mapped state */ |
| 2542 | static void simple_overlay_update (struct obj_section *); |
| 2543 | void (*target_overlay_update) (struct obj_section *) = simple_overlay_update; |
| 2544 | |
| 2545 | /* Function: section_is_overlay (SECTION) |
| 2546 | Returns true if SECTION has VMA not equal to LMA, ie. |
| 2547 | SECTION is loaded at an address different from where it will "run". */ |
| 2548 | |
| 2549 | int |
| 2550 | section_is_overlay (asection *section) |
| 2551 | { |
| 2552 | /* FIXME: need bfd *, so we can use bfd_section_lma methods. */ |
| 2553 | |
| 2554 | if (overlay_debugging) |
| 2555 | if (section && section->lma != 0 && |
| 2556 | section->vma != section->lma) |
| 2557 | return 1; |
| 2558 | |
| 2559 | return 0; |
| 2560 | } |
| 2561 | |
| 2562 | /* Function: overlay_invalidate_all (void) |
| 2563 | Invalidate the mapped state of all overlay sections (mark it as stale). */ |
| 2564 | |
| 2565 | static void |
| 2566 | overlay_invalidate_all (void) |
| 2567 | { |
| 2568 | struct objfile *objfile; |
| 2569 | struct obj_section *sect; |
| 2570 | |
| 2571 | ALL_OBJSECTIONS (objfile, sect) |
| 2572 | if (section_is_overlay (sect->the_bfd_section)) |
| 2573 | sect->ovly_mapped = -1; |
| 2574 | } |
| 2575 | |
| 2576 | /* Function: overlay_is_mapped (SECTION) |
| 2577 | Returns true if section is an overlay, and is currently mapped. |
| 2578 | Private: public access is thru function section_is_mapped. |
| 2579 | |
| 2580 | Access to the ovly_mapped flag is restricted to this function, so |
| 2581 | that we can do automatic update. If the global flag |
| 2582 | OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call |
| 2583 | overlay_invalidate_all. If the mapped state of the particular |
| 2584 | section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */ |
| 2585 | |
| 2586 | static int |
| 2587 | overlay_is_mapped (struct obj_section *osect) |
| 2588 | { |
| 2589 | if (osect == 0 || !section_is_overlay (osect->the_bfd_section)) |
| 2590 | return 0; |
| 2591 | |
| 2592 | switch (overlay_debugging) |
| 2593 | { |
| 2594 | default: |
| 2595 | case ovly_off: |
| 2596 | return 0; /* overlay debugging off */ |
| 2597 | case ovly_auto: /* overlay debugging automatic */ |
| 2598 | /* Unles there is a target_overlay_update function, |
| 2599 | there's really nothing useful to do here (can't really go auto) */ |
| 2600 | if (target_overlay_update) |
| 2601 | { |
| 2602 | if (overlay_cache_invalid) |
| 2603 | { |
| 2604 | overlay_invalidate_all (); |
| 2605 | overlay_cache_invalid = 0; |
| 2606 | } |
| 2607 | if (osect->ovly_mapped == -1) |
| 2608 | (*target_overlay_update) (osect); |
| 2609 | } |
| 2610 | /* fall thru to manual case */ |
| 2611 | case ovly_on: /* overlay debugging manual */ |
| 2612 | return osect->ovly_mapped == 1; |
| 2613 | } |
| 2614 | } |
| 2615 | |
| 2616 | /* Function: section_is_mapped |
| 2617 | Returns true if section is an overlay, and is currently mapped. */ |
| 2618 | |
| 2619 | int |
| 2620 | section_is_mapped (asection *section) |
| 2621 | { |
| 2622 | struct objfile *objfile; |
| 2623 | struct obj_section *osect; |
| 2624 | |
| 2625 | if (overlay_debugging) |
| 2626 | if (section && section_is_overlay (section)) |
| 2627 | ALL_OBJSECTIONS (objfile, osect) |
| 2628 | if (osect->the_bfd_section == section) |
| 2629 | return overlay_is_mapped (osect); |
| 2630 | |
| 2631 | return 0; |
| 2632 | } |
| 2633 | |
| 2634 | /* Function: pc_in_unmapped_range |
| 2635 | If PC falls into the lma range of SECTION, return true, else false. */ |
| 2636 | |
| 2637 | CORE_ADDR |
| 2638 | pc_in_unmapped_range (CORE_ADDR pc, asection *section) |
| 2639 | { |
| 2640 | /* FIXME: need bfd *, so we can use bfd_section_lma methods. */ |
| 2641 | |
| 2642 | int size; |
| 2643 | |
| 2644 | if (overlay_debugging) |
| 2645 | if (section && section_is_overlay (section)) |
| 2646 | { |
| 2647 | size = bfd_get_section_size_before_reloc (section); |
| 2648 | if (section->lma <= pc && pc < section->lma + size) |
| 2649 | return 1; |
| 2650 | } |
| 2651 | return 0; |
| 2652 | } |
| 2653 | |
| 2654 | /* Function: pc_in_mapped_range |
| 2655 | If PC falls into the vma range of SECTION, return true, else false. */ |
| 2656 | |
| 2657 | CORE_ADDR |
| 2658 | pc_in_mapped_range (CORE_ADDR pc, asection *section) |
| 2659 | { |
| 2660 | /* FIXME: need bfd *, so we can use bfd_section_vma methods. */ |
| 2661 | |
| 2662 | int size; |
| 2663 | |
| 2664 | if (overlay_debugging) |
| 2665 | if (section && section_is_overlay (section)) |
| 2666 | { |
| 2667 | size = bfd_get_section_size_before_reloc (section); |
| 2668 | if (section->vma <= pc && pc < section->vma + size) |
| 2669 | return 1; |
| 2670 | } |
| 2671 | return 0; |
| 2672 | } |
| 2673 | |
| 2674 | |
| 2675 | /* Return true if the mapped ranges of sections A and B overlap, false |
| 2676 | otherwise. */ |
| 2677 | int |
| 2678 | sections_overlap (asection *a, asection *b) |
| 2679 | { |
| 2680 | /* FIXME: need bfd *, so we can use bfd_section_vma methods. */ |
| 2681 | |
| 2682 | CORE_ADDR a_start = a->vma; |
| 2683 | CORE_ADDR a_end = a->vma + bfd_get_section_size_before_reloc (a); |
| 2684 | CORE_ADDR b_start = b->vma; |
| 2685 | CORE_ADDR b_end = b->vma + bfd_get_section_size_before_reloc (b); |
| 2686 | |
| 2687 | return (a_start < b_end && b_start < a_end); |
| 2688 | } |
| 2689 | |
| 2690 | /* Function: overlay_unmapped_address (PC, SECTION) |
| 2691 | Returns the address corresponding to PC in the unmapped (load) range. |
| 2692 | May be the same as PC. */ |
| 2693 | |
| 2694 | CORE_ADDR |
| 2695 | overlay_unmapped_address (CORE_ADDR pc, asection *section) |
| 2696 | { |
| 2697 | /* FIXME: need bfd *, so we can use bfd_section_lma methods. */ |
| 2698 | |
| 2699 | if (overlay_debugging) |
| 2700 | if (section && section_is_overlay (section) && |
| 2701 | pc_in_mapped_range (pc, section)) |
| 2702 | return pc + section->lma - section->vma; |
| 2703 | |
| 2704 | return pc; |
| 2705 | } |
| 2706 | |
| 2707 | /* Function: overlay_mapped_address (PC, SECTION) |
| 2708 | Returns the address corresponding to PC in the mapped (runtime) range. |
| 2709 | May be the same as PC. */ |
| 2710 | |
| 2711 | CORE_ADDR |
| 2712 | overlay_mapped_address (CORE_ADDR pc, asection *section) |
| 2713 | { |
| 2714 | /* FIXME: need bfd *, so we can use bfd_section_vma methods. */ |
| 2715 | |
| 2716 | if (overlay_debugging) |
| 2717 | if (section && section_is_overlay (section) && |
| 2718 | pc_in_unmapped_range (pc, section)) |
| 2719 | return pc + section->vma - section->lma; |
| 2720 | |
| 2721 | return pc; |
| 2722 | } |
| 2723 | |
| 2724 | |
| 2725 | /* Function: symbol_overlayed_address |
| 2726 | Return one of two addresses (relative to the VMA or to the LMA), |
| 2727 | depending on whether the section is mapped or not. */ |
| 2728 | |
| 2729 | CORE_ADDR |
| 2730 | symbol_overlayed_address (CORE_ADDR address, asection *section) |
| 2731 | { |
| 2732 | if (overlay_debugging) |
| 2733 | { |
| 2734 | /* If the symbol has no section, just return its regular address. */ |
| 2735 | if (section == 0) |
| 2736 | return address; |
| 2737 | /* If the symbol's section is not an overlay, just return its address */ |
| 2738 | if (!section_is_overlay (section)) |
| 2739 | return address; |
| 2740 | /* If the symbol's section is mapped, just return its address */ |
| 2741 | if (section_is_mapped (section)) |
| 2742 | return address; |
| 2743 | /* |
| 2744 | * HOWEVER: if the symbol is in an overlay section which is NOT mapped, |
| 2745 | * then return its LOADED address rather than its vma address!! |
| 2746 | */ |
| 2747 | return overlay_unmapped_address (address, section); |
| 2748 | } |
| 2749 | return address; |
| 2750 | } |
| 2751 | |
| 2752 | /* Function: find_pc_overlay (PC) |
| 2753 | Return the best-match overlay section for PC: |
| 2754 | If PC matches a mapped overlay section's VMA, return that section. |
| 2755 | Else if PC matches an unmapped section's VMA, return that section. |
| 2756 | Else if PC matches an unmapped section's LMA, return that section. */ |
| 2757 | |
| 2758 | asection * |
| 2759 | find_pc_overlay (CORE_ADDR pc) |
| 2760 | { |
| 2761 | struct objfile *objfile; |
| 2762 | struct obj_section *osect, *best_match = NULL; |
| 2763 | |
| 2764 | if (overlay_debugging) |
| 2765 | ALL_OBJSECTIONS (objfile, osect) |
| 2766 | if (section_is_overlay (osect->the_bfd_section)) |
| 2767 | { |
| 2768 | if (pc_in_mapped_range (pc, osect->the_bfd_section)) |
| 2769 | { |
| 2770 | if (overlay_is_mapped (osect)) |
| 2771 | return osect->the_bfd_section; |
| 2772 | else |
| 2773 | best_match = osect; |
| 2774 | } |
| 2775 | else if (pc_in_unmapped_range (pc, osect->the_bfd_section)) |
| 2776 | best_match = osect; |
| 2777 | } |
| 2778 | return best_match ? best_match->the_bfd_section : NULL; |
| 2779 | } |
| 2780 | |
| 2781 | /* Function: find_pc_mapped_section (PC) |
| 2782 | If PC falls into the VMA address range of an overlay section that is |
| 2783 | currently marked as MAPPED, return that section. Else return NULL. */ |
| 2784 | |
| 2785 | asection * |
| 2786 | find_pc_mapped_section (CORE_ADDR pc) |
| 2787 | { |
| 2788 | struct objfile *objfile; |
| 2789 | struct obj_section *osect; |
| 2790 | |
| 2791 | if (overlay_debugging) |
| 2792 | ALL_OBJSECTIONS (objfile, osect) |
| 2793 | if (pc_in_mapped_range (pc, osect->the_bfd_section) && |
| 2794 | overlay_is_mapped (osect)) |
| 2795 | return osect->the_bfd_section; |
| 2796 | |
| 2797 | return NULL; |
| 2798 | } |
| 2799 | |
| 2800 | /* Function: list_overlays_command |
| 2801 | Print a list of mapped sections and their PC ranges */ |
| 2802 | |
| 2803 | void |
| 2804 | list_overlays_command (char *args, int from_tty) |
| 2805 | { |
| 2806 | int nmapped = 0; |
| 2807 | struct objfile *objfile; |
| 2808 | struct obj_section *osect; |
| 2809 | |
| 2810 | if (overlay_debugging) |
| 2811 | ALL_OBJSECTIONS (objfile, osect) |
| 2812 | if (overlay_is_mapped (osect)) |
| 2813 | { |
| 2814 | const char *name; |
| 2815 | bfd_vma lma, vma; |
| 2816 | int size; |
| 2817 | |
| 2818 | vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section); |
| 2819 | lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section); |
| 2820 | size = bfd_get_section_size_before_reloc (osect->the_bfd_section); |
| 2821 | name = bfd_section_name (objfile->obfd, osect->the_bfd_section); |
| 2822 | |
| 2823 | printf_filtered ("Section %s, loaded at ", name); |
| 2824 | print_address_numeric (lma, 1, gdb_stdout); |
| 2825 | puts_filtered (" - "); |
| 2826 | print_address_numeric (lma + size, 1, gdb_stdout); |
| 2827 | printf_filtered (", mapped at "); |
| 2828 | print_address_numeric (vma, 1, gdb_stdout); |
| 2829 | puts_filtered (" - "); |
| 2830 | print_address_numeric (vma + size, 1, gdb_stdout); |
| 2831 | puts_filtered ("\n"); |
| 2832 | |
| 2833 | nmapped++; |
| 2834 | } |
| 2835 | if (nmapped == 0) |
| 2836 | printf_filtered ("No sections are mapped.\n"); |
| 2837 | } |
| 2838 | |
| 2839 | /* Function: map_overlay_command |
| 2840 | Mark the named section as mapped (ie. residing at its VMA address). */ |
| 2841 | |
| 2842 | void |
| 2843 | map_overlay_command (char *args, int from_tty) |
| 2844 | { |
| 2845 | struct objfile *objfile, *objfile2; |
| 2846 | struct obj_section *sec, *sec2; |
| 2847 | asection *bfdsec; |
| 2848 | |
| 2849 | if (!overlay_debugging) |
| 2850 | error ("\ |
| 2851 | Overlay debugging not enabled. Use either the 'overlay auto' or\n\ |
| 2852 | the 'overlay manual' command."); |
| 2853 | |
| 2854 | if (args == 0 || *args == 0) |
| 2855 | error ("Argument required: name of an overlay section"); |
| 2856 | |
| 2857 | /* First, find a section matching the user supplied argument */ |
| 2858 | ALL_OBJSECTIONS (objfile, sec) |
| 2859 | if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) |
| 2860 | { |
| 2861 | /* Now, check to see if the section is an overlay. */ |
| 2862 | bfdsec = sec->the_bfd_section; |
| 2863 | if (!section_is_overlay (bfdsec)) |
| 2864 | continue; /* not an overlay section */ |
| 2865 | |
| 2866 | /* Mark the overlay as "mapped" */ |
| 2867 | sec->ovly_mapped = 1; |
| 2868 | |
| 2869 | /* Next, make a pass and unmap any sections that are |
| 2870 | overlapped by this new section: */ |
| 2871 | ALL_OBJSECTIONS (objfile2, sec2) |
| 2872 | if (sec2->ovly_mapped |
| 2873 | && sec != sec2 |
| 2874 | && sec->the_bfd_section != sec2->the_bfd_section |
| 2875 | && sections_overlap (sec->the_bfd_section, |
| 2876 | sec2->the_bfd_section)) |
| 2877 | { |
| 2878 | if (info_verbose) |
| 2879 | printf_filtered ("Note: section %s unmapped by overlap\n", |
| 2880 | bfd_section_name (objfile->obfd, |
| 2881 | sec2->the_bfd_section)); |
| 2882 | sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */ |
| 2883 | } |
| 2884 | return; |
| 2885 | } |
| 2886 | error ("No overlay section called %s", args); |
| 2887 | } |
| 2888 | |
| 2889 | /* Function: unmap_overlay_command |
| 2890 | Mark the overlay section as unmapped |
| 2891 | (ie. resident in its LMA address range, rather than the VMA range). */ |
| 2892 | |
| 2893 | void |
| 2894 | unmap_overlay_command (char *args, int from_tty) |
| 2895 | { |
| 2896 | struct objfile *objfile; |
| 2897 | struct obj_section *sec; |
| 2898 | |
| 2899 | if (!overlay_debugging) |
| 2900 | error ("\ |
| 2901 | Overlay debugging not enabled. Use either the 'overlay auto' or\n\ |
| 2902 | the 'overlay manual' command."); |
| 2903 | |
| 2904 | if (args == 0 || *args == 0) |
| 2905 | error ("Argument required: name of an overlay section"); |
| 2906 | |
| 2907 | /* First, find a section matching the user supplied argument */ |
| 2908 | ALL_OBJSECTIONS (objfile, sec) |
| 2909 | if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) |
| 2910 | { |
| 2911 | if (!sec->ovly_mapped) |
| 2912 | error ("Section %s is not mapped", args); |
| 2913 | sec->ovly_mapped = 0; |
| 2914 | return; |
| 2915 | } |
| 2916 | error ("No overlay section called %s", args); |
| 2917 | } |
| 2918 | |
| 2919 | /* Function: overlay_auto_command |
| 2920 | A utility command to turn on overlay debugging. |
| 2921 | Possibly this should be done via a set/show command. */ |
| 2922 | |
| 2923 | static void |
| 2924 | overlay_auto_command (char *args, int from_tty) |
| 2925 | { |
| 2926 | overlay_debugging = ovly_auto; |
| 2927 | enable_overlay_breakpoints (); |
| 2928 | if (info_verbose) |
| 2929 | printf_filtered ("Automatic overlay debugging enabled."); |
| 2930 | } |
| 2931 | |
| 2932 | /* Function: overlay_manual_command |
| 2933 | A utility command to turn on overlay debugging. |
| 2934 | Possibly this should be done via a set/show command. */ |
| 2935 | |
| 2936 | static void |
| 2937 | overlay_manual_command (char *args, int from_tty) |
| 2938 | { |
| 2939 | overlay_debugging = ovly_on; |
| 2940 | disable_overlay_breakpoints (); |
| 2941 | if (info_verbose) |
| 2942 | printf_filtered ("Overlay debugging enabled."); |
| 2943 | } |
| 2944 | |
| 2945 | /* Function: overlay_off_command |
| 2946 | A utility command to turn on overlay debugging. |
| 2947 | Possibly this should be done via a set/show command. */ |
| 2948 | |
| 2949 | static void |
| 2950 | overlay_off_command (char *args, int from_tty) |
| 2951 | { |
| 2952 | overlay_debugging = ovly_off; |
| 2953 | disable_overlay_breakpoints (); |
| 2954 | if (info_verbose) |
| 2955 | printf_filtered ("Overlay debugging disabled."); |
| 2956 | } |
| 2957 | |
| 2958 | static void |
| 2959 | overlay_load_command (char *args, int from_tty) |
| 2960 | { |
| 2961 | if (target_overlay_update) |
| 2962 | (*target_overlay_update) (NULL); |
| 2963 | else |
| 2964 | error ("This target does not know how to read its overlay state."); |
| 2965 | } |
| 2966 | |
| 2967 | /* Function: overlay_command |
| 2968 | A place-holder for a mis-typed command */ |
| 2969 | |
| 2970 | /* Command list chain containing all defined "overlay" subcommands. */ |
| 2971 | struct cmd_list_element *overlaylist; |
| 2972 | |
| 2973 | static void |
| 2974 | overlay_command (char *args, int from_tty) |
| 2975 | { |
| 2976 | printf_unfiltered |
| 2977 | ("\"overlay\" must be followed by the name of an overlay command.\n"); |
| 2978 | help_list (overlaylist, "overlay ", -1, gdb_stdout); |
| 2979 | } |
| 2980 | |
| 2981 | |
| 2982 | /* Target Overlays for the "Simplest" overlay manager: |
| 2983 | |
| 2984 | This is GDB's default target overlay layer. It works with the |
| 2985 | minimal overlay manager supplied as an example by Cygnus. The |
| 2986 | entry point is via a function pointer "target_overlay_update", |
| 2987 | so targets that use a different runtime overlay manager can |
| 2988 | substitute their own overlay_update function and take over the |
| 2989 | function pointer. |
| 2990 | |
| 2991 | The overlay_update function pokes around in the target's data structures |
| 2992 | to see what overlays are mapped, and updates GDB's overlay mapping with |
| 2993 | this information. |
| 2994 | |
| 2995 | In this simple implementation, the target data structures are as follows: |
| 2996 | unsigned _novlys; /# number of overlay sections #/ |
| 2997 | unsigned _ovly_table[_novlys][4] = { |
| 2998 | {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/ |
| 2999 | {..., ..., ..., ...}, |
| 3000 | } |
| 3001 | unsigned _novly_regions; /# number of overlay regions #/ |
| 3002 | unsigned _ovly_region_table[_novly_regions][3] = { |
| 3003 | {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/ |
| 3004 | {..., ..., ...}, |
| 3005 | } |
| 3006 | These functions will attempt to update GDB's mappedness state in the |
| 3007 | symbol section table, based on the target's mappedness state. |
| 3008 | |
| 3009 | To do this, we keep a cached copy of the target's _ovly_table, and |
| 3010 | attempt to detect when the cached copy is invalidated. The main |
| 3011 | entry point is "simple_overlay_update(SECT), which looks up SECT in |
| 3012 | the cached table and re-reads only the entry for that section from |
| 3013 | the target (whenever possible). |
| 3014 | */ |
| 3015 | |
| 3016 | /* Cached, dynamically allocated copies of the target data structures: */ |
| 3017 | static unsigned (*cache_ovly_table)[4] = 0; |
| 3018 | #if 0 |
| 3019 | static unsigned (*cache_ovly_region_table)[3] = 0; |
| 3020 | #endif |
| 3021 | static unsigned cache_novlys = 0; |
| 3022 | #if 0 |
| 3023 | static unsigned cache_novly_regions = 0; |
| 3024 | #endif |
| 3025 | static CORE_ADDR cache_ovly_table_base = 0; |
| 3026 | #if 0 |
| 3027 | static CORE_ADDR cache_ovly_region_table_base = 0; |
| 3028 | #endif |
| 3029 | enum ovly_index |
| 3030 | { |
| 3031 | VMA, SIZE, LMA, MAPPED |
| 3032 | }; |
| 3033 | #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT) |
| 3034 | |
| 3035 | /* Throw away the cached copy of _ovly_table */ |
| 3036 | static void |
| 3037 | simple_free_overlay_table (void) |
| 3038 | { |
| 3039 | if (cache_ovly_table) |
| 3040 | xfree (cache_ovly_table); |
| 3041 | cache_novlys = 0; |
| 3042 | cache_ovly_table = NULL; |
| 3043 | cache_ovly_table_base = 0; |
| 3044 | } |
| 3045 | |
| 3046 | #if 0 |
| 3047 | /* Throw away the cached copy of _ovly_region_table */ |
| 3048 | static void |
| 3049 | simple_free_overlay_region_table (void) |
| 3050 | { |
| 3051 | if (cache_ovly_region_table) |
| 3052 | xfree (cache_ovly_region_table); |
| 3053 | cache_novly_regions = 0; |
| 3054 | cache_ovly_region_table = NULL; |
| 3055 | cache_ovly_region_table_base = 0; |
| 3056 | } |
| 3057 | #endif |
| 3058 | |
| 3059 | /* Read an array of ints from the target into a local buffer. |
| 3060 | Convert to host order. int LEN is number of ints */ |
| 3061 | static void |
| 3062 | read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr, int len) |
| 3063 | { |
| 3064 | /* FIXME (alloca): Not safe if array is very large. */ |
| 3065 | char *buf = alloca (len * TARGET_LONG_BYTES); |
| 3066 | int i; |
| 3067 | |
| 3068 | read_memory (memaddr, buf, len * TARGET_LONG_BYTES); |
| 3069 | for (i = 0; i < len; i++) |
| 3070 | myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf, |
| 3071 | TARGET_LONG_BYTES); |
| 3072 | } |
| 3073 | |
| 3074 | /* Find and grab a copy of the target _ovly_table |
| 3075 | (and _novlys, which is needed for the table's size) */ |
| 3076 | static int |
| 3077 | simple_read_overlay_table (void) |
| 3078 | { |
| 3079 | struct minimal_symbol *novlys_msym, *ovly_table_msym; |
| 3080 | |
| 3081 | simple_free_overlay_table (); |
| 3082 | novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL); |
| 3083 | if (! novlys_msym) |
| 3084 | { |
| 3085 | error ("Error reading inferior's overlay table: " |
| 3086 | "couldn't find `_novlys' variable\n" |
| 3087 | "in inferior. Use `overlay manual' mode."); |
| 3088 | return 0; |
| 3089 | } |
| 3090 | |
| 3091 | ovly_table_msym = lookup_minimal_symbol ("_ovly_table", NULL, NULL); |
| 3092 | if (! ovly_table_msym) |
| 3093 | { |
| 3094 | error ("Error reading inferior's overlay table: couldn't find " |
| 3095 | "`_ovly_table' array\n" |
| 3096 | "in inferior. Use `overlay manual' mode."); |
| 3097 | return 0; |
| 3098 | } |
| 3099 | |
| 3100 | cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym), 4); |
| 3101 | cache_ovly_table |
| 3102 | = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table)); |
| 3103 | cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym); |
| 3104 | read_target_long_array (cache_ovly_table_base, |
| 3105 | (int *) cache_ovly_table, |
| 3106 | cache_novlys * 4); |
| 3107 | |
| 3108 | return 1; /* SUCCESS */ |
| 3109 | } |
| 3110 | |
| 3111 | #if 0 |
| 3112 | /* Find and grab a copy of the target _ovly_region_table |
| 3113 | (and _novly_regions, which is needed for the table's size) */ |
| 3114 | static int |
| 3115 | simple_read_overlay_region_table (void) |
| 3116 | { |
| 3117 | struct minimal_symbol *msym; |
| 3118 | |
| 3119 | simple_free_overlay_region_table (); |
| 3120 | msym = lookup_minimal_symbol ("_novly_regions", NULL, NULL); |
| 3121 | if (msym != NULL) |
| 3122 | cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4); |
| 3123 | else |
| 3124 | return 0; /* failure */ |
| 3125 | cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12); |
| 3126 | if (cache_ovly_region_table != NULL) |
| 3127 | { |
| 3128 | msym = lookup_minimal_symbol ("_ovly_region_table", NULL, NULL); |
| 3129 | if (msym != NULL) |
| 3130 | { |
| 3131 | cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym); |
| 3132 | read_target_long_array (cache_ovly_region_table_base, |
| 3133 | (int *) cache_ovly_region_table, |
| 3134 | cache_novly_regions * 3); |
| 3135 | } |
| 3136 | else |
| 3137 | return 0; /* failure */ |
| 3138 | } |
| 3139 | else |
| 3140 | return 0; /* failure */ |
| 3141 | return 1; /* SUCCESS */ |
| 3142 | } |
| 3143 | #endif |
| 3144 | |
| 3145 | /* Function: simple_overlay_update_1 |
| 3146 | A helper function for simple_overlay_update. Assuming a cached copy |
| 3147 | of _ovly_table exists, look through it to find an entry whose vma, |
| 3148 | lma and size match those of OSECT. Re-read the entry and make sure |
| 3149 | it still matches OSECT (else the table may no longer be valid). |
| 3150 | Set OSECT's mapped state to match the entry. Return: 1 for |
| 3151 | success, 0 for failure. */ |
| 3152 | |
| 3153 | static int |
| 3154 | simple_overlay_update_1 (struct obj_section *osect) |
| 3155 | { |
| 3156 | int i, size; |
| 3157 | bfd *obfd = osect->objfile->obfd; |
| 3158 | asection *bsect = osect->the_bfd_section; |
| 3159 | |
| 3160 | size = bfd_get_section_size_before_reloc (osect->the_bfd_section); |
| 3161 | for (i = 0; i < cache_novlys; i++) |
| 3162 | if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) |
| 3163 | && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) |
| 3164 | /* && cache_ovly_table[i][SIZE] == size */ ) |
| 3165 | { |
| 3166 | read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES, |
| 3167 | (int *) cache_ovly_table[i], 4); |
| 3168 | if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) |
| 3169 | && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) |
| 3170 | /* && cache_ovly_table[i][SIZE] == size */ ) |
| 3171 | { |
| 3172 | osect->ovly_mapped = cache_ovly_table[i][MAPPED]; |
| 3173 | return 1; |
| 3174 | } |
| 3175 | else /* Warning! Warning! Target's ovly table has changed! */ |
| 3176 | return 0; |
| 3177 | } |
| 3178 | return 0; |
| 3179 | } |
| 3180 | |
| 3181 | /* Function: simple_overlay_update |
| 3182 | If OSECT is NULL, then update all sections' mapped state |
| 3183 | (after re-reading the entire target _ovly_table). |
| 3184 | If OSECT is non-NULL, then try to find a matching entry in the |
| 3185 | cached ovly_table and update only OSECT's mapped state. |
| 3186 | If a cached entry can't be found or the cache isn't valid, then |
| 3187 | re-read the entire cache, and go ahead and update all sections. */ |
| 3188 | |
| 3189 | static void |
| 3190 | simple_overlay_update (struct obj_section *osect) |
| 3191 | { |
| 3192 | struct objfile *objfile; |
| 3193 | |
| 3194 | /* Were we given an osect to look up? NULL means do all of them. */ |
| 3195 | if (osect) |
| 3196 | /* Have we got a cached copy of the target's overlay table? */ |
| 3197 | if (cache_ovly_table != NULL) |
| 3198 | /* Does its cached location match what's currently in the symtab? */ |
| 3199 | if (cache_ovly_table_base == |
| 3200 | SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL, NULL))) |
| 3201 | /* Then go ahead and try to look up this single section in the cache */ |
| 3202 | if (simple_overlay_update_1 (osect)) |
| 3203 | /* Found it! We're done. */ |
| 3204 | return; |
| 3205 | |
| 3206 | /* Cached table no good: need to read the entire table anew. |
| 3207 | Or else we want all the sections, in which case it's actually |
| 3208 | more efficient to read the whole table in one block anyway. */ |
| 3209 | |
| 3210 | if (! simple_read_overlay_table ()) |
| 3211 | return; |
| 3212 | |
| 3213 | /* Now may as well update all sections, even if only one was requested. */ |
| 3214 | ALL_OBJSECTIONS (objfile, osect) |
| 3215 | if (section_is_overlay (osect->the_bfd_section)) |
| 3216 | { |
| 3217 | int i, size; |
| 3218 | bfd *obfd = osect->objfile->obfd; |
| 3219 | asection *bsect = osect->the_bfd_section; |
| 3220 | |
| 3221 | size = bfd_get_section_size_before_reloc (osect->the_bfd_section); |
| 3222 | for (i = 0; i < cache_novlys; i++) |
| 3223 | if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) |
| 3224 | && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) |
| 3225 | /* && cache_ovly_table[i][SIZE] == size */ ) |
| 3226 | { /* obj_section matches i'th entry in ovly_table */ |
| 3227 | osect->ovly_mapped = cache_ovly_table[i][MAPPED]; |
| 3228 | break; /* finished with inner for loop: break out */ |
| 3229 | } |
| 3230 | } |
| 3231 | } |
| 3232 | |
| 3233 | |
| 3234 | void |
| 3235 | _initialize_symfile (void) |
| 3236 | { |
| 3237 | struct cmd_list_element *c; |
| 3238 | |
| 3239 | c = add_cmd ("symbol-file", class_files, symbol_file_command, |
| 3240 | "Load symbol table from executable file FILE.\n\ |
| 3241 | The `file' command can also load symbol tables, as well as setting the file\n\ |
| 3242 | to execute.", &cmdlist); |
| 3243 | set_cmd_completer (c, filename_completer); |
| 3244 | |
| 3245 | c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, |
| 3246 | "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\ |
| 3247 | Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\ |
| 3248 | ADDR is the starting address of the file's text.\n\ |
| 3249 | The optional arguments are section-name section-address pairs and\n\ |
| 3250 | should be specified if the data and bss segments are not contiguous\n\ |
| 3251 | with the text. SECT is a section name to be loaded at SECT_ADDR.", |
| 3252 | &cmdlist); |
| 3253 | set_cmd_completer (c, filename_completer); |
| 3254 | |
| 3255 | c = add_cmd ("add-shared-symbol-files", class_files, |
| 3256 | add_shared_symbol_files_command, |
| 3257 | "Load the symbols from shared objects in the dynamic linker's link map.", |
| 3258 | &cmdlist); |
| 3259 | c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1, |
| 3260 | &cmdlist); |
| 3261 | |
| 3262 | c = add_cmd ("load", class_files, load_command, |
| 3263 | "Dynamically load FILE into the running program, and record its symbols\n\ |
| 3264 | for access from GDB.", &cmdlist); |
| 3265 | set_cmd_completer (c, filename_completer); |
| 3266 | |
| 3267 | add_show_from_set |
| 3268 | (add_set_cmd ("symbol-reloading", class_support, var_boolean, |
| 3269 | (char *) &symbol_reloading, |
| 3270 | "Set dynamic symbol table reloading multiple times in one run.", |
| 3271 | &setlist), |
| 3272 | &showlist); |
| 3273 | |
| 3274 | add_prefix_cmd ("overlay", class_support, overlay_command, |
| 3275 | "Commands for debugging overlays.", &overlaylist, |
| 3276 | "overlay ", 0, &cmdlist); |
| 3277 | |
| 3278 | add_com_alias ("ovly", "overlay", class_alias, 1); |
| 3279 | add_com_alias ("ov", "overlay", class_alias, 1); |
| 3280 | |
| 3281 | add_cmd ("map-overlay", class_support, map_overlay_command, |
| 3282 | "Assert that an overlay section is mapped.", &overlaylist); |
| 3283 | |
| 3284 | add_cmd ("unmap-overlay", class_support, unmap_overlay_command, |
| 3285 | "Assert that an overlay section is unmapped.", &overlaylist); |
| 3286 | |
| 3287 | add_cmd ("list-overlays", class_support, list_overlays_command, |
| 3288 | "List mappings of overlay sections.", &overlaylist); |
| 3289 | |
| 3290 | add_cmd ("manual", class_support, overlay_manual_command, |
| 3291 | "Enable overlay debugging.", &overlaylist); |
| 3292 | add_cmd ("off", class_support, overlay_off_command, |
| 3293 | "Disable overlay debugging.", &overlaylist); |
| 3294 | add_cmd ("auto", class_support, overlay_auto_command, |
| 3295 | "Enable automatic overlay debugging.", &overlaylist); |
| 3296 | add_cmd ("load-target", class_support, overlay_load_command, |
| 3297 | "Read the overlay mapping state from the target.", &overlaylist); |
| 3298 | |
| 3299 | /* Filename extension to source language lookup table: */ |
| 3300 | init_filename_language_table (); |
| 3301 | c = add_set_cmd ("extension-language", class_files, var_string_noescape, |
| 3302 | (char *) &ext_args, |
| 3303 | "Set mapping between filename extension and source language.\n\ |
| 3304 | Usage: set extension-language .foo bar", |
| 3305 | &setlist); |
| 3306 | set_cmd_cfunc (c, set_ext_lang_command); |
| 3307 | |
| 3308 | add_info ("extensions", info_ext_lang_command, |
| 3309 | "All filename extensions associated with a source language."); |
| 3310 | |
| 3311 | add_show_from_set |
| 3312 | (add_set_cmd ("download-write-size", class_obscure, |
| 3313 | var_integer, (char *) &download_write_size, |
| 3314 | "Set the write size used when downloading a program.\n" |
| 3315 | "Only used when downloading a program onto a remote\n" |
| 3316 | "target. Specify zero, or a negative value, to disable\n" |
| 3317 | "blocked writes. The actual size of each transfer is also\n" |
| 3318 | "limited by the size of the target packet and the memory\n" |
| 3319 | "cache.\n", |
| 3320 | &setlist), |
| 3321 | &showlist); |
| 3322 | } |