| 1 | /* Generic symbol file reading for the GNU debugger, GDB. |
| 2 | |
| 3 | Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
| 4 | 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
| 5 | Free Software Foundation, Inc. |
| 6 | |
| 7 | Contributed by Cygnus Support, using pieces from other GDB modules. |
| 8 | |
| 9 | This file is part of GDB. |
| 10 | |
| 11 | This program is free software; you can redistribute it and/or modify |
| 12 | it under the terms of the GNU General Public License as published by |
| 13 | the Free Software Foundation; either version 3 of the License, or |
| 14 | (at your option) any later version. |
| 15 | |
| 16 | This program is distributed in the hope that it will be useful, |
| 17 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | GNU General Public License for more details. |
| 20 | |
| 21 | You should have received a copy of the GNU General Public License |
| 22 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 23 | |
| 24 | #include "defs.h" |
| 25 | #include "bfdlink.h" |
| 26 | #include "symtab.h" |
| 27 | #include "gdbtypes.h" |
| 28 | #include "gdbcore.h" |
| 29 | #include "frame.h" |
| 30 | #include "target.h" |
| 31 | #include "value.h" |
| 32 | #include "symfile.h" |
| 33 | #include "objfiles.h" |
| 34 | #include "source.h" |
| 35 | #include "gdbcmd.h" |
| 36 | #include "breakpoint.h" |
| 37 | #include "language.h" |
| 38 | #include "complaints.h" |
| 39 | #include "demangle.h" |
| 40 | #include "inferior.h" /* for write_pc */ |
| 41 | #include "filenames.h" /* for DOSish file names */ |
| 42 | #include "gdb-stabs.h" |
| 43 | #include "gdb_obstack.h" |
| 44 | #include "completer.h" |
| 45 | #include "bcache.h" |
| 46 | #include "hashtab.h" |
| 47 | #include "readline/readline.h" |
| 48 | #include "gdb_assert.h" |
| 49 | #include "block.h" |
| 50 | #include "observer.h" |
| 51 | #include "exec.h" |
| 52 | #include "parser-defs.h" |
| 53 | #include "varobj.h" |
| 54 | #include "elf-bfd.h" |
| 55 | #include "solib.h" |
| 56 | |
| 57 | #include <sys/types.h> |
| 58 | #include <fcntl.h> |
| 59 | #include "gdb_string.h" |
| 60 | #include "gdb_stat.h" |
| 61 | #include <ctype.h> |
| 62 | #include <time.h> |
| 63 | #include <sys/time.h> |
| 64 | |
| 65 | |
| 66 | int (*deprecated_ui_load_progress_hook) (const char *section, unsigned long num); |
| 67 | void (*deprecated_show_load_progress) (const char *section, |
| 68 | unsigned long section_sent, |
| 69 | unsigned long section_size, |
| 70 | unsigned long total_sent, |
| 71 | unsigned long total_size); |
| 72 | void (*deprecated_pre_add_symbol_hook) (const char *); |
| 73 | void (*deprecated_post_add_symbol_hook) (void); |
| 74 | |
| 75 | static void clear_symtab_users_cleanup (void *ignore); |
| 76 | |
| 77 | /* Global variables owned by this file */ |
| 78 | int readnow_symbol_files; /* Read full symbols immediately */ |
| 79 | |
| 80 | /* External variables and functions referenced. */ |
| 81 | |
| 82 | extern void report_transfer_performance (unsigned long, time_t, time_t); |
| 83 | |
| 84 | /* Functions this file defines */ |
| 85 | |
| 86 | #if 0 |
| 87 | static int simple_read_overlay_region_table (void); |
| 88 | static void simple_free_overlay_region_table (void); |
| 89 | #endif |
| 90 | |
| 91 | static void load_command (char *, int); |
| 92 | |
| 93 | static void symbol_file_add_main_1 (char *args, int from_tty, int flags); |
| 94 | |
| 95 | static void add_symbol_file_command (char *, int); |
| 96 | |
| 97 | static void add_shared_symbol_files_command (char *, int); |
| 98 | |
| 99 | static void reread_separate_symbols (struct objfile *objfile); |
| 100 | |
| 101 | static void cashier_psymtab (struct partial_symtab *); |
| 102 | |
| 103 | bfd *symfile_bfd_open (char *); |
| 104 | |
| 105 | int get_section_index (struct objfile *, char *); |
| 106 | |
| 107 | static struct sym_fns *find_sym_fns (bfd *); |
| 108 | |
| 109 | static void decrement_reading_symtab (void *); |
| 110 | |
| 111 | static void overlay_invalidate_all (void); |
| 112 | |
| 113 | static int overlay_is_mapped (struct obj_section *); |
| 114 | |
| 115 | void list_overlays_command (char *, int); |
| 116 | |
| 117 | void map_overlay_command (char *, int); |
| 118 | |
| 119 | void unmap_overlay_command (char *, int); |
| 120 | |
| 121 | static void overlay_auto_command (char *, int); |
| 122 | |
| 123 | static void overlay_manual_command (char *, int); |
| 124 | |
| 125 | static void overlay_off_command (char *, int); |
| 126 | |
| 127 | static void overlay_load_command (char *, int); |
| 128 | |
| 129 | static void overlay_command (char *, int); |
| 130 | |
| 131 | static void simple_free_overlay_table (void); |
| 132 | |
| 133 | static void read_target_long_array (CORE_ADDR, unsigned int *, int); |
| 134 | |
| 135 | static int simple_read_overlay_table (void); |
| 136 | |
| 137 | static int simple_overlay_update_1 (struct obj_section *); |
| 138 | |
| 139 | static void add_filename_language (char *ext, enum language lang); |
| 140 | |
| 141 | static void info_ext_lang_command (char *args, int from_tty); |
| 142 | |
| 143 | static char *find_separate_debug_file (struct objfile *objfile); |
| 144 | |
| 145 | static void init_filename_language_table (void); |
| 146 | |
| 147 | static void symfile_find_segment_sections (struct objfile *objfile); |
| 148 | |
| 149 | void _initialize_symfile (void); |
| 150 | |
| 151 | /* List of all available sym_fns. On gdb startup, each object file reader |
| 152 | calls add_symtab_fns() to register information on each format it is |
| 153 | prepared to read. */ |
| 154 | |
| 155 | static struct sym_fns *symtab_fns = NULL; |
| 156 | |
| 157 | /* Flag for whether user will be reloading symbols multiple times. |
| 158 | Defaults to ON for VxWorks, otherwise OFF. */ |
| 159 | |
| 160 | #ifdef SYMBOL_RELOADING_DEFAULT |
| 161 | int symbol_reloading = SYMBOL_RELOADING_DEFAULT; |
| 162 | #else |
| 163 | int symbol_reloading = 0; |
| 164 | #endif |
| 165 | static void |
| 166 | show_symbol_reloading (struct ui_file *file, int from_tty, |
| 167 | struct cmd_list_element *c, const char *value) |
| 168 | { |
| 169 | fprintf_filtered (file, _("\ |
| 170 | Dynamic symbol table reloading multiple times in one run is %s.\n"), |
| 171 | value); |
| 172 | } |
| 173 | |
| 174 | |
| 175 | /* If non-zero, shared library symbols will be added automatically |
| 176 | when the inferior is created, new libraries are loaded, or when |
| 177 | attaching to the inferior. This is almost always what users will |
| 178 | want to have happen; but for very large programs, the startup time |
| 179 | will be excessive, and so if this is a problem, the user can clear |
| 180 | this flag and then add the shared library symbols as needed. Note |
| 181 | that there is a potential for confusion, since if the shared |
| 182 | library symbols are not loaded, commands like "info fun" will *not* |
| 183 | report all the functions that are actually present. */ |
| 184 | |
| 185 | int auto_solib_add = 1; |
| 186 | |
| 187 | /* For systems that support it, a threshold size in megabytes. If |
| 188 | automatically adding a new library's symbol table to those already |
| 189 | known to the debugger would cause the total shared library symbol |
| 190 | size to exceed this threshhold, then the shlib's symbols are not |
| 191 | added. The threshold is ignored if the user explicitly asks for a |
| 192 | shlib to be added, such as when using the "sharedlibrary" |
| 193 | command. */ |
| 194 | |
| 195 | int auto_solib_limit; |
| 196 | \f |
| 197 | |
| 198 | /* This compares two partial symbols by names, using strcmp_iw_ordered |
| 199 | for the comparison. */ |
| 200 | |
| 201 | static int |
| 202 | compare_psymbols (const void *s1p, const void *s2p) |
| 203 | { |
| 204 | struct partial_symbol *const *s1 = s1p; |
| 205 | struct partial_symbol *const *s2 = s2p; |
| 206 | |
| 207 | return strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*s1), |
| 208 | SYMBOL_SEARCH_NAME (*s2)); |
| 209 | } |
| 210 | |
| 211 | void |
| 212 | sort_pst_symbols (struct partial_symtab *pst) |
| 213 | { |
| 214 | /* Sort the global list; don't sort the static list */ |
| 215 | |
| 216 | qsort (pst->objfile->global_psymbols.list + pst->globals_offset, |
| 217 | pst->n_global_syms, sizeof (struct partial_symbol *), |
| 218 | compare_psymbols); |
| 219 | } |
| 220 | |
| 221 | /* Make a null terminated copy of the string at PTR with SIZE characters in |
| 222 | the obstack pointed to by OBSTACKP . Returns the address of the copy. |
| 223 | Note that the string at PTR does not have to be null terminated, I.E. it |
| 224 | may be part of a larger string and we are only saving a substring. */ |
| 225 | |
| 226 | char * |
| 227 | obsavestring (const char *ptr, int size, struct obstack *obstackp) |
| 228 | { |
| 229 | char *p = (char *) obstack_alloc (obstackp, size + 1); |
| 230 | /* Open-coded memcpy--saves function call time. These strings are usually |
| 231 | short. FIXME: Is this really still true with a compiler that can |
| 232 | inline memcpy? */ |
| 233 | { |
| 234 | const char *p1 = ptr; |
| 235 | char *p2 = p; |
| 236 | const char *end = ptr + size; |
| 237 | while (p1 != end) |
| 238 | *p2++ = *p1++; |
| 239 | } |
| 240 | p[size] = 0; |
| 241 | return p; |
| 242 | } |
| 243 | |
| 244 | /* Concatenate strings S1, S2 and S3; return the new string. Space is found |
| 245 | in the obstack pointed to by OBSTACKP. */ |
| 246 | |
| 247 | char * |
| 248 | obconcat (struct obstack *obstackp, const char *s1, const char *s2, |
| 249 | const char *s3) |
| 250 | { |
| 251 | int len = strlen (s1) + strlen (s2) + strlen (s3) + 1; |
| 252 | char *val = (char *) obstack_alloc (obstackp, len); |
| 253 | strcpy (val, s1); |
| 254 | strcat (val, s2); |
| 255 | strcat (val, s3); |
| 256 | return val; |
| 257 | } |
| 258 | |
| 259 | /* True if we are nested inside psymtab_to_symtab. */ |
| 260 | |
| 261 | int currently_reading_symtab = 0; |
| 262 | |
| 263 | static void |
| 264 | decrement_reading_symtab (void *dummy) |
| 265 | { |
| 266 | currently_reading_symtab--; |
| 267 | } |
| 268 | |
| 269 | /* Get the symbol table that corresponds to a partial_symtab. |
| 270 | This is fast after the first time you do it. In fact, there |
| 271 | is an even faster macro PSYMTAB_TO_SYMTAB that does the fast |
| 272 | case inline. */ |
| 273 | |
| 274 | struct symtab * |
| 275 | psymtab_to_symtab (struct partial_symtab *pst) |
| 276 | { |
| 277 | /* If it's been looked up before, return it. */ |
| 278 | if (pst->symtab) |
| 279 | return pst->symtab; |
| 280 | |
| 281 | /* If it has not yet been read in, read it. */ |
| 282 | if (!pst->readin) |
| 283 | { |
| 284 | struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL); |
| 285 | currently_reading_symtab++; |
| 286 | (*pst->read_symtab) (pst); |
| 287 | do_cleanups (back_to); |
| 288 | } |
| 289 | |
| 290 | return pst->symtab; |
| 291 | } |
| 292 | |
| 293 | /* Remember the lowest-addressed loadable section we've seen. |
| 294 | This function is called via bfd_map_over_sections. |
| 295 | |
| 296 | In case of equal vmas, the section with the largest size becomes the |
| 297 | lowest-addressed loadable section. |
| 298 | |
| 299 | If the vmas and sizes are equal, the last section is considered the |
| 300 | lowest-addressed loadable section. */ |
| 301 | |
| 302 | void |
| 303 | find_lowest_section (bfd *abfd, asection *sect, void *obj) |
| 304 | { |
| 305 | asection **lowest = (asection **) obj; |
| 306 | |
| 307 | if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD)) |
| 308 | return; |
| 309 | if (!*lowest) |
| 310 | *lowest = sect; /* First loadable section */ |
| 311 | else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect)) |
| 312 | *lowest = sect; /* A lower loadable section */ |
| 313 | else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect) |
| 314 | && (bfd_section_size (abfd, (*lowest)) |
| 315 | <= bfd_section_size (abfd, sect))) |
| 316 | *lowest = sect; |
| 317 | } |
| 318 | |
| 319 | /* Create a new section_addr_info, with room for NUM_SECTIONS. */ |
| 320 | |
| 321 | struct section_addr_info * |
| 322 | alloc_section_addr_info (size_t num_sections) |
| 323 | { |
| 324 | struct section_addr_info *sap; |
| 325 | size_t size; |
| 326 | |
| 327 | size = (sizeof (struct section_addr_info) |
| 328 | + sizeof (struct other_sections) * (num_sections - 1)); |
| 329 | sap = (struct section_addr_info *) xmalloc (size); |
| 330 | memset (sap, 0, size); |
| 331 | sap->num_sections = num_sections; |
| 332 | |
| 333 | return sap; |
| 334 | } |
| 335 | |
| 336 | |
| 337 | /* Return a freshly allocated copy of ADDRS. The section names, if |
| 338 | any, are also freshly allocated copies of those in ADDRS. */ |
| 339 | struct section_addr_info * |
| 340 | copy_section_addr_info (struct section_addr_info *addrs) |
| 341 | { |
| 342 | struct section_addr_info *copy |
| 343 | = alloc_section_addr_info (addrs->num_sections); |
| 344 | int i; |
| 345 | |
| 346 | copy->num_sections = addrs->num_sections; |
| 347 | for (i = 0; i < addrs->num_sections; i++) |
| 348 | { |
| 349 | copy->other[i].addr = addrs->other[i].addr; |
| 350 | if (addrs->other[i].name) |
| 351 | copy->other[i].name = xstrdup (addrs->other[i].name); |
| 352 | else |
| 353 | copy->other[i].name = NULL; |
| 354 | copy->other[i].sectindex = addrs->other[i].sectindex; |
| 355 | } |
| 356 | |
| 357 | return copy; |
| 358 | } |
| 359 | |
| 360 | |
| 361 | |
| 362 | /* Build (allocate and populate) a section_addr_info struct from |
| 363 | an existing section table. */ |
| 364 | |
| 365 | extern struct section_addr_info * |
| 366 | build_section_addr_info_from_section_table (const struct section_table *start, |
| 367 | const struct section_table *end) |
| 368 | { |
| 369 | struct section_addr_info *sap; |
| 370 | const struct section_table *stp; |
| 371 | int oidx; |
| 372 | |
| 373 | sap = alloc_section_addr_info (end - start); |
| 374 | |
| 375 | for (stp = start, oidx = 0; stp != end; stp++) |
| 376 | { |
| 377 | if (bfd_get_section_flags (stp->bfd, |
| 378 | stp->the_bfd_section) & (SEC_ALLOC | SEC_LOAD) |
| 379 | && oidx < end - start) |
| 380 | { |
| 381 | sap->other[oidx].addr = stp->addr; |
| 382 | sap->other[oidx].name |
| 383 | = xstrdup (bfd_section_name (stp->bfd, stp->the_bfd_section)); |
| 384 | sap->other[oidx].sectindex = stp->the_bfd_section->index; |
| 385 | oidx++; |
| 386 | } |
| 387 | } |
| 388 | |
| 389 | return sap; |
| 390 | } |
| 391 | |
| 392 | |
| 393 | /* Free all memory allocated by build_section_addr_info_from_section_table. */ |
| 394 | |
| 395 | extern void |
| 396 | free_section_addr_info (struct section_addr_info *sap) |
| 397 | { |
| 398 | int idx; |
| 399 | |
| 400 | for (idx = 0; idx < sap->num_sections; idx++) |
| 401 | if (sap->other[idx].name) |
| 402 | xfree (sap->other[idx].name); |
| 403 | xfree (sap); |
| 404 | } |
| 405 | |
| 406 | |
| 407 | /* Initialize OBJFILE's sect_index_* members. */ |
| 408 | static void |
| 409 | init_objfile_sect_indices (struct objfile *objfile) |
| 410 | { |
| 411 | asection *sect; |
| 412 | int i; |
| 413 | |
| 414 | sect = bfd_get_section_by_name (objfile->obfd, ".text"); |
| 415 | if (sect) |
| 416 | objfile->sect_index_text = sect->index; |
| 417 | |
| 418 | sect = bfd_get_section_by_name (objfile->obfd, ".data"); |
| 419 | if (sect) |
| 420 | objfile->sect_index_data = sect->index; |
| 421 | |
| 422 | sect = bfd_get_section_by_name (objfile->obfd, ".bss"); |
| 423 | if (sect) |
| 424 | objfile->sect_index_bss = sect->index; |
| 425 | |
| 426 | sect = bfd_get_section_by_name (objfile->obfd, ".rodata"); |
| 427 | if (sect) |
| 428 | objfile->sect_index_rodata = sect->index; |
| 429 | |
| 430 | /* This is where things get really weird... We MUST have valid |
| 431 | indices for the various sect_index_* members or gdb will abort. |
| 432 | So if for example, there is no ".text" section, we have to |
| 433 | accomodate that. First, check for a file with the standard |
| 434 | one or two segments. */ |
| 435 | |
| 436 | symfile_find_segment_sections (objfile); |
| 437 | |
| 438 | /* Except when explicitly adding symbol files at some address, |
| 439 | section_offsets contains nothing but zeros, so it doesn't matter |
| 440 | which slot in section_offsets the individual sect_index_* members |
| 441 | index into. So if they are all zero, it is safe to just point |
| 442 | all the currently uninitialized indices to the first slot. But |
| 443 | beware: if this is the main executable, it may be relocated |
| 444 | later, e.g. by the remote qOffsets packet, and then this will |
| 445 | be wrong! That's why we try segments first. */ |
| 446 | |
| 447 | for (i = 0; i < objfile->num_sections; i++) |
| 448 | { |
| 449 | if (ANOFFSET (objfile->section_offsets, i) != 0) |
| 450 | { |
| 451 | break; |
| 452 | } |
| 453 | } |
| 454 | if (i == objfile->num_sections) |
| 455 | { |
| 456 | if (objfile->sect_index_text == -1) |
| 457 | objfile->sect_index_text = 0; |
| 458 | if (objfile->sect_index_data == -1) |
| 459 | objfile->sect_index_data = 0; |
| 460 | if (objfile->sect_index_bss == -1) |
| 461 | objfile->sect_index_bss = 0; |
| 462 | if (objfile->sect_index_rodata == -1) |
| 463 | objfile->sect_index_rodata = 0; |
| 464 | } |
| 465 | } |
| 466 | |
| 467 | /* The arguments to place_section. */ |
| 468 | |
| 469 | struct place_section_arg |
| 470 | { |
| 471 | struct section_offsets *offsets; |
| 472 | CORE_ADDR lowest; |
| 473 | }; |
| 474 | |
| 475 | /* Find a unique offset to use for loadable section SECT if |
| 476 | the user did not provide an offset. */ |
| 477 | |
| 478 | void |
| 479 | place_section (bfd *abfd, asection *sect, void *obj) |
| 480 | { |
| 481 | struct place_section_arg *arg = obj; |
| 482 | CORE_ADDR *offsets = arg->offsets->offsets, start_addr; |
| 483 | int done; |
| 484 | ULONGEST align = ((ULONGEST) 1) << bfd_get_section_alignment (abfd, sect); |
| 485 | |
| 486 | /* We are only interested in allocated sections. */ |
| 487 | if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) |
| 488 | return; |
| 489 | |
| 490 | /* If the user specified an offset, honor it. */ |
| 491 | if (offsets[sect->index] != 0) |
| 492 | return; |
| 493 | |
| 494 | /* Otherwise, let's try to find a place for the section. */ |
| 495 | start_addr = (arg->lowest + align - 1) & -align; |
| 496 | |
| 497 | do { |
| 498 | asection *cur_sec; |
| 499 | |
| 500 | done = 1; |
| 501 | |
| 502 | for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next) |
| 503 | { |
| 504 | int indx = cur_sec->index; |
| 505 | CORE_ADDR cur_offset; |
| 506 | |
| 507 | /* We don't need to compare against ourself. */ |
| 508 | if (cur_sec == sect) |
| 509 | continue; |
| 510 | |
| 511 | /* We can only conflict with allocated sections. */ |
| 512 | if ((bfd_get_section_flags (abfd, cur_sec) & SEC_ALLOC) == 0) |
| 513 | continue; |
| 514 | |
| 515 | /* If the section offset is 0, either the section has not been placed |
| 516 | yet, or it was the lowest section placed (in which case LOWEST |
| 517 | will be past its end). */ |
| 518 | if (offsets[indx] == 0) |
| 519 | continue; |
| 520 | |
| 521 | /* If this section would overlap us, then we must move up. */ |
| 522 | if (start_addr + bfd_get_section_size (sect) > offsets[indx] |
| 523 | && start_addr < offsets[indx] + bfd_get_section_size (cur_sec)) |
| 524 | { |
| 525 | start_addr = offsets[indx] + bfd_get_section_size (cur_sec); |
| 526 | start_addr = (start_addr + align - 1) & -align; |
| 527 | done = 0; |
| 528 | break; |
| 529 | } |
| 530 | |
| 531 | /* Otherwise, we appear to be OK. So far. */ |
| 532 | } |
| 533 | } |
| 534 | while (!done); |
| 535 | |
| 536 | offsets[sect->index] = start_addr; |
| 537 | arg->lowest = start_addr + bfd_get_section_size (sect); |
| 538 | } |
| 539 | |
| 540 | /* Parse the user's idea of an offset for dynamic linking, into our idea |
| 541 | of how to represent it for fast symbol reading. This is the default |
| 542 | version of the sym_fns.sym_offsets function for symbol readers that |
| 543 | don't need to do anything special. It allocates a section_offsets table |
| 544 | for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */ |
| 545 | |
| 546 | void |
| 547 | default_symfile_offsets (struct objfile *objfile, |
| 548 | struct section_addr_info *addrs) |
| 549 | { |
| 550 | int i; |
| 551 | |
| 552 | objfile->num_sections = bfd_count_sections (objfile->obfd); |
| 553 | objfile->section_offsets = (struct section_offsets *) |
| 554 | obstack_alloc (&objfile->objfile_obstack, |
| 555 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); |
| 556 | memset (objfile->section_offsets, 0, |
| 557 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); |
| 558 | |
| 559 | /* Now calculate offsets for section that were specified by the |
| 560 | caller. */ |
| 561 | for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++) |
| 562 | { |
| 563 | struct other_sections *osp ; |
| 564 | |
| 565 | osp = &addrs->other[i] ; |
| 566 | if (osp->addr == 0) |
| 567 | continue; |
| 568 | |
| 569 | /* Record all sections in offsets */ |
| 570 | /* The section_offsets in the objfile are here filled in using |
| 571 | the BFD index. */ |
| 572 | (objfile->section_offsets)->offsets[osp->sectindex] = osp->addr; |
| 573 | } |
| 574 | |
| 575 | /* For relocatable files, all loadable sections will start at zero. |
| 576 | The zero is meaningless, so try to pick arbitrary addresses such |
| 577 | that no loadable sections overlap. This algorithm is quadratic, |
| 578 | but the number of sections in a single object file is generally |
| 579 | small. */ |
| 580 | if ((bfd_get_file_flags (objfile->obfd) & (EXEC_P | DYNAMIC)) == 0) |
| 581 | { |
| 582 | struct place_section_arg arg; |
| 583 | bfd *abfd = objfile->obfd; |
| 584 | asection *cur_sec; |
| 585 | CORE_ADDR lowest = 0; |
| 586 | |
| 587 | for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next) |
| 588 | /* We do not expect this to happen; just skip this step if the |
| 589 | relocatable file has a section with an assigned VMA. */ |
| 590 | if (bfd_section_vma (abfd, cur_sec) != 0) |
| 591 | break; |
| 592 | |
| 593 | if (cur_sec == NULL) |
| 594 | { |
| 595 | CORE_ADDR *offsets = objfile->section_offsets->offsets; |
| 596 | |
| 597 | /* Pick non-overlapping offsets for sections the user did not |
| 598 | place explicitly. */ |
| 599 | arg.offsets = objfile->section_offsets; |
| 600 | arg.lowest = 0; |
| 601 | bfd_map_over_sections (objfile->obfd, place_section, &arg); |
| 602 | |
| 603 | /* Correctly filling in the section offsets is not quite |
| 604 | enough. Relocatable files have two properties that |
| 605 | (most) shared objects do not: |
| 606 | |
| 607 | - Their debug information will contain relocations. Some |
| 608 | shared libraries do also, but many do not, so this can not |
| 609 | be assumed. |
| 610 | |
| 611 | - If there are multiple code sections they will be loaded |
| 612 | at different relative addresses in memory than they are |
| 613 | in the objfile, since all sections in the file will start |
| 614 | at address zero. |
| 615 | |
| 616 | Because GDB has very limited ability to map from an |
| 617 | address in debug info to the correct code section, |
| 618 | it relies on adding SECT_OFF_TEXT to things which might be |
| 619 | code. If we clear all the section offsets, and set the |
| 620 | section VMAs instead, then symfile_relocate_debug_section |
| 621 | will return meaningful debug information pointing at the |
| 622 | correct sections. |
| 623 | |
| 624 | GDB has too many different data structures for section |
| 625 | addresses - a bfd, objfile, and so_list all have section |
| 626 | tables, as does exec_ops. Some of these could probably |
| 627 | be eliminated. */ |
| 628 | |
| 629 | for (cur_sec = abfd->sections; cur_sec != NULL; |
| 630 | cur_sec = cur_sec->next) |
| 631 | { |
| 632 | if ((bfd_get_section_flags (abfd, cur_sec) & SEC_ALLOC) == 0) |
| 633 | continue; |
| 634 | |
| 635 | bfd_set_section_vma (abfd, cur_sec, offsets[cur_sec->index]); |
| 636 | exec_set_section_address (bfd_get_filename (abfd), cur_sec->index, |
| 637 | offsets[cur_sec->index]); |
| 638 | offsets[cur_sec->index] = 0; |
| 639 | } |
| 640 | } |
| 641 | } |
| 642 | |
| 643 | /* Remember the bfd indexes for the .text, .data, .bss and |
| 644 | .rodata sections. */ |
| 645 | init_objfile_sect_indices (objfile); |
| 646 | } |
| 647 | |
| 648 | |
| 649 | /* Divide the file into segments, which are individual relocatable units. |
| 650 | This is the default version of the sym_fns.sym_segments function for |
| 651 | symbol readers that do not have an explicit representation of segments. |
| 652 | It assumes that object files do not have segments, and fully linked |
| 653 | files have a single segment. */ |
| 654 | |
| 655 | struct symfile_segment_data * |
| 656 | default_symfile_segments (bfd *abfd) |
| 657 | { |
| 658 | int num_sections, i; |
| 659 | asection *sect; |
| 660 | struct symfile_segment_data *data; |
| 661 | CORE_ADDR low, high; |
| 662 | |
| 663 | /* Relocatable files contain enough information to position each |
| 664 | loadable section independently; they should not be relocated |
| 665 | in segments. */ |
| 666 | if ((bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) == 0) |
| 667 | return NULL; |
| 668 | |
| 669 | /* Make sure there is at least one loadable section in the file. */ |
| 670 | for (sect = abfd->sections; sect != NULL; sect = sect->next) |
| 671 | { |
| 672 | if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) |
| 673 | continue; |
| 674 | |
| 675 | break; |
| 676 | } |
| 677 | if (sect == NULL) |
| 678 | return NULL; |
| 679 | |
| 680 | low = bfd_get_section_vma (abfd, sect); |
| 681 | high = low + bfd_get_section_size (sect); |
| 682 | |
| 683 | data = XZALLOC (struct symfile_segment_data); |
| 684 | data->num_segments = 1; |
| 685 | data->segment_bases = XCALLOC (1, CORE_ADDR); |
| 686 | data->segment_sizes = XCALLOC (1, CORE_ADDR); |
| 687 | |
| 688 | num_sections = bfd_count_sections (abfd); |
| 689 | data->segment_info = XCALLOC (num_sections, int); |
| 690 | |
| 691 | for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next) |
| 692 | { |
| 693 | CORE_ADDR vma; |
| 694 | |
| 695 | if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) |
| 696 | continue; |
| 697 | |
| 698 | vma = bfd_get_section_vma (abfd, sect); |
| 699 | if (vma < low) |
| 700 | low = vma; |
| 701 | if (vma + bfd_get_section_size (sect) > high) |
| 702 | high = vma + bfd_get_section_size (sect); |
| 703 | |
| 704 | data->segment_info[i] = 1; |
| 705 | } |
| 706 | |
| 707 | data->segment_bases[0] = low; |
| 708 | data->segment_sizes[0] = high - low; |
| 709 | |
| 710 | return data; |
| 711 | } |
| 712 | |
| 713 | /* Process a symbol file, as either the main file or as a dynamically |
| 714 | loaded file. |
| 715 | |
| 716 | OBJFILE is where the symbols are to be read from. |
| 717 | |
| 718 | ADDRS is the list of section load addresses. If the user has given |
| 719 | an 'add-symbol-file' command, then this is the list of offsets and |
| 720 | addresses he or she provided as arguments to the command; or, if |
| 721 | we're handling a shared library, these are the actual addresses the |
| 722 | sections are loaded at, according to the inferior's dynamic linker |
| 723 | (as gleaned by GDB's shared library code). We convert each address |
| 724 | into an offset from the section VMA's as it appears in the object |
| 725 | file, and then call the file's sym_offsets function to convert this |
| 726 | into a format-specific offset table --- a `struct section_offsets'. |
| 727 | If ADDRS is non-zero, OFFSETS must be zero. |
| 728 | |
| 729 | OFFSETS is a table of section offsets already in the right |
| 730 | format-specific representation. NUM_OFFSETS is the number of |
| 731 | elements present in OFFSETS->offsets. If OFFSETS is non-zero, we |
| 732 | assume this is the proper table the call to sym_offsets described |
| 733 | above would produce. Instead of calling sym_offsets, we just dump |
| 734 | it right into objfile->section_offsets. (When we're re-reading |
| 735 | symbols from an objfile, we don't have the original load address |
| 736 | list any more; all we have is the section offset table.) If |
| 737 | OFFSETS is non-zero, ADDRS must be zero. |
| 738 | |
| 739 | MAINLINE is nonzero if this is the main symbol file, or zero if |
| 740 | it's an extra symbol file such as dynamically loaded code. |
| 741 | |
| 742 | VERBO is nonzero if the caller has printed a verbose message about |
| 743 | the symbol reading (and complaints can be more terse about it). */ |
| 744 | |
| 745 | void |
| 746 | syms_from_objfile (struct objfile *objfile, |
| 747 | struct section_addr_info *addrs, |
| 748 | struct section_offsets *offsets, |
| 749 | int num_offsets, |
| 750 | int mainline, |
| 751 | int verbo) |
| 752 | { |
| 753 | struct section_addr_info *local_addr = NULL; |
| 754 | struct cleanup *old_chain; |
| 755 | |
| 756 | gdb_assert (! (addrs && offsets)); |
| 757 | |
| 758 | init_entry_point_info (objfile); |
| 759 | objfile->sf = find_sym_fns (objfile->obfd); |
| 760 | |
| 761 | if (objfile->sf == NULL) |
| 762 | return; /* No symbols. */ |
| 763 | |
| 764 | /* Make sure that partially constructed symbol tables will be cleaned up |
| 765 | if an error occurs during symbol reading. */ |
| 766 | old_chain = make_cleanup_free_objfile (objfile); |
| 767 | |
| 768 | /* If ADDRS and OFFSETS are both NULL, put together a dummy address |
| 769 | list. We now establish the convention that an addr of zero means |
| 770 | no load address was specified. */ |
| 771 | if (! addrs && ! offsets) |
| 772 | { |
| 773 | local_addr |
| 774 | = alloc_section_addr_info (bfd_count_sections (objfile->obfd)); |
| 775 | make_cleanup (xfree, local_addr); |
| 776 | addrs = local_addr; |
| 777 | } |
| 778 | |
| 779 | /* Now either addrs or offsets is non-zero. */ |
| 780 | |
| 781 | if (mainline) |
| 782 | { |
| 783 | /* We will modify the main symbol table, make sure that all its users |
| 784 | will be cleaned up if an error occurs during symbol reading. */ |
| 785 | make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/); |
| 786 | |
| 787 | /* Since no error yet, throw away the old symbol table. */ |
| 788 | |
| 789 | if (symfile_objfile != NULL) |
| 790 | { |
| 791 | free_objfile (symfile_objfile); |
| 792 | symfile_objfile = NULL; |
| 793 | } |
| 794 | |
| 795 | /* Currently we keep symbols from the add-symbol-file command. |
| 796 | If the user wants to get rid of them, they should do "symbol-file" |
| 797 | without arguments first. Not sure this is the best behavior |
| 798 | (PR 2207). */ |
| 799 | |
| 800 | (*objfile->sf->sym_new_init) (objfile); |
| 801 | } |
| 802 | |
| 803 | /* Convert addr into an offset rather than an absolute address. |
| 804 | We find the lowest address of a loaded segment in the objfile, |
| 805 | and assume that <addr> is where that got loaded. |
| 806 | |
| 807 | We no longer warn if the lowest section is not a text segment (as |
| 808 | happens for the PA64 port. */ |
| 809 | if (!mainline && addrs && addrs->other[0].name) |
| 810 | { |
| 811 | asection *lower_sect; |
| 812 | asection *sect; |
| 813 | CORE_ADDR lower_offset; |
| 814 | int i; |
| 815 | |
| 816 | /* Find lowest loadable section to be used as starting point for |
| 817 | continguous sections. FIXME!! won't work without call to find |
| 818 | .text first, but this assumes text is lowest section. */ |
| 819 | lower_sect = bfd_get_section_by_name (objfile->obfd, ".text"); |
| 820 | if (lower_sect == NULL) |
| 821 | bfd_map_over_sections (objfile->obfd, find_lowest_section, |
| 822 | &lower_sect); |
| 823 | if (lower_sect == NULL) |
| 824 | { |
| 825 | warning (_("no loadable sections found in added symbol-file %s"), |
| 826 | objfile->name); |
| 827 | lower_offset = 0; |
| 828 | } |
| 829 | else |
| 830 | lower_offset = bfd_section_vma (objfile->obfd, lower_sect); |
| 831 | |
| 832 | /* Calculate offsets for the loadable sections. |
| 833 | FIXME! Sections must be in order of increasing loadable section |
| 834 | so that contiguous sections can use the lower-offset!!! |
| 835 | |
| 836 | Adjust offsets if the segments are not contiguous. |
| 837 | If the section is contiguous, its offset should be set to |
| 838 | the offset of the highest loadable section lower than it |
| 839 | (the loadable section directly below it in memory). |
| 840 | this_offset = lower_offset = lower_addr - lower_orig_addr */ |
| 841 | |
| 842 | for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++) |
| 843 | { |
| 844 | if (addrs->other[i].addr != 0) |
| 845 | { |
| 846 | sect = bfd_get_section_by_name (objfile->obfd, |
| 847 | addrs->other[i].name); |
| 848 | if (sect) |
| 849 | { |
| 850 | addrs->other[i].addr |
| 851 | -= bfd_section_vma (objfile->obfd, sect); |
| 852 | lower_offset = addrs->other[i].addr; |
| 853 | /* This is the index used by BFD. */ |
| 854 | addrs->other[i].sectindex = sect->index ; |
| 855 | } |
| 856 | else |
| 857 | { |
| 858 | warning (_("section %s not found in %s"), |
| 859 | addrs->other[i].name, |
| 860 | objfile->name); |
| 861 | addrs->other[i].addr = 0; |
| 862 | } |
| 863 | } |
| 864 | else |
| 865 | addrs->other[i].addr = lower_offset; |
| 866 | } |
| 867 | } |
| 868 | |
| 869 | /* Initialize symbol reading routines for this objfile, allow complaints to |
| 870 | appear for this new file, and record how verbose to be, then do the |
| 871 | initial symbol reading for this file. */ |
| 872 | |
| 873 | (*objfile->sf->sym_init) (objfile); |
| 874 | clear_complaints (&symfile_complaints, 1, verbo); |
| 875 | |
| 876 | if (addrs) |
| 877 | (*objfile->sf->sym_offsets) (objfile, addrs); |
| 878 | else |
| 879 | { |
| 880 | size_t size = SIZEOF_N_SECTION_OFFSETS (num_offsets); |
| 881 | |
| 882 | /* Just copy in the offset table directly as given to us. */ |
| 883 | objfile->num_sections = num_offsets; |
| 884 | objfile->section_offsets |
| 885 | = ((struct section_offsets *) |
| 886 | obstack_alloc (&objfile->objfile_obstack, size)); |
| 887 | memcpy (objfile->section_offsets, offsets, size); |
| 888 | |
| 889 | init_objfile_sect_indices (objfile); |
| 890 | } |
| 891 | |
| 892 | #ifndef DEPRECATED_IBM6000_TARGET |
| 893 | /* This is a SVR4/SunOS specific hack, I think. In any event, it |
| 894 | screws RS/6000. sym_offsets should be doing this sort of thing, |
| 895 | because it knows the mapping between bfd sections and |
| 896 | section_offsets. */ |
| 897 | /* This is a hack. As far as I can tell, section offsets are not |
| 898 | target dependent. They are all set to addr with a couple of |
| 899 | exceptions. The exceptions are sysvr4 shared libraries, whose |
| 900 | offsets are kept in solib structures anyway and rs6000 xcoff |
| 901 | which handles shared libraries in a completely unique way. |
| 902 | |
| 903 | Section offsets are built similarly, except that they are built |
| 904 | by adding addr in all cases because there is no clear mapping |
| 905 | from section_offsets into actual sections. Note that solib.c |
| 906 | has a different algorithm for finding section offsets. |
| 907 | |
| 908 | These should probably all be collapsed into some target |
| 909 | independent form of shared library support. FIXME. */ |
| 910 | |
| 911 | if (addrs) |
| 912 | { |
| 913 | struct obj_section *s; |
| 914 | |
| 915 | /* Map section offsets in "addr" back to the object's |
| 916 | sections by comparing the section names with bfd's |
| 917 | section names. Then adjust the section address by |
| 918 | the offset. */ /* for gdb/13815 */ |
| 919 | |
| 920 | ALL_OBJFILE_OSECTIONS (objfile, s) |
| 921 | { |
| 922 | CORE_ADDR s_addr = 0; |
| 923 | int i; |
| 924 | |
| 925 | for (i = 0; |
| 926 | !s_addr && i < addrs->num_sections && addrs->other[i].name; |
| 927 | i++) |
| 928 | if (strcmp (bfd_section_name (s->objfile->obfd, |
| 929 | s->the_bfd_section), |
| 930 | addrs->other[i].name) == 0) |
| 931 | s_addr = addrs->other[i].addr; /* end added for gdb/13815 */ |
| 932 | |
| 933 | s->addr -= s->offset; |
| 934 | s->addr += s_addr; |
| 935 | s->endaddr -= s->offset; |
| 936 | s->endaddr += s_addr; |
| 937 | s->offset += s_addr; |
| 938 | } |
| 939 | } |
| 940 | #endif /* not DEPRECATED_IBM6000_TARGET */ |
| 941 | |
| 942 | (*objfile->sf->sym_read) (objfile, mainline); |
| 943 | |
| 944 | /* Don't allow char * to have a typename (else would get caddr_t). |
| 945 | Ditto void *. FIXME: Check whether this is now done by all the |
| 946 | symbol readers themselves (many of them now do), and if so remove |
| 947 | it from here. */ |
| 948 | |
| 949 | TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0; |
| 950 | TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0; |
| 951 | |
| 952 | /* Mark the objfile has having had initial symbol read attempted. Note |
| 953 | that this does not mean we found any symbols... */ |
| 954 | |
| 955 | objfile->flags |= OBJF_SYMS; |
| 956 | |
| 957 | /* Discard cleanups as symbol reading was successful. */ |
| 958 | |
| 959 | discard_cleanups (old_chain); |
| 960 | } |
| 961 | |
| 962 | /* Perform required actions after either reading in the initial |
| 963 | symbols for a new objfile, or mapping in the symbols from a reusable |
| 964 | objfile. */ |
| 965 | |
| 966 | void |
| 967 | new_symfile_objfile (struct objfile *objfile, int mainline, int verbo) |
| 968 | { |
| 969 | |
| 970 | /* If this is the main symbol file we have to clean up all users of the |
| 971 | old main symbol file. Otherwise it is sufficient to fixup all the |
| 972 | breakpoints that may have been redefined by this symbol file. */ |
| 973 | if (mainline) |
| 974 | { |
| 975 | /* OK, make it the "real" symbol file. */ |
| 976 | symfile_objfile = objfile; |
| 977 | |
| 978 | clear_symtab_users (); |
| 979 | } |
| 980 | else |
| 981 | { |
| 982 | breakpoint_re_set (); |
| 983 | } |
| 984 | |
| 985 | /* We're done reading the symbol file; finish off complaints. */ |
| 986 | clear_complaints (&symfile_complaints, 0, verbo); |
| 987 | } |
| 988 | |
| 989 | /* Process a symbol file, as either the main file or as a dynamically |
| 990 | loaded file. |
| 991 | |
| 992 | ABFD is a BFD already open on the file, as from symfile_bfd_open. |
| 993 | This BFD will be closed on error, and is always consumed by this function. |
| 994 | |
| 995 | FROM_TTY says how verbose to be. |
| 996 | |
| 997 | MAINLINE specifies whether this is the main symbol file, or whether |
| 998 | it's an extra symbol file such as dynamically loaded code. |
| 999 | |
| 1000 | ADDRS, OFFSETS, and NUM_OFFSETS are as described for |
| 1001 | syms_from_objfile, above. ADDRS is ignored when MAINLINE is |
| 1002 | non-zero. |
| 1003 | |
| 1004 | Upon success, returns a pointer to the objfile that was added. |
| 1005 | Upon failure, jumps back to command level (never returns). */ |
| 1006 | static struct objfile * |
| 1007 | symbol_file_add_with_addrs_or_offsets (bfd *abfd, int from_tty, |
| 1008 | struct section_addr_info *addrs, |
| 1009 | struct section_offsets *offsets, |
| 1010 | int num_offsets, |
| 1011 | int mainline, int flags) |
| 1012 | { |
| 1013 | struct objfile *objfile; |
| 1014 | struct partial_symtab *psymtab; |
| 1015 | char *debugfile = NULL; |
| 1016 | struct section_addr_info *orig_addrs = NULL; |
| 1017 | struct cleanup *my_cleanups; |
| 1018 | const char *name = bfd_get_filename (abfd); |
| 1019 | |
| 1020 | my_cleanups = make_cleanup_bfd_close (abfd); |
| 1021 | |
| 1022 | /* Give user a chance to burp if we'd be |
| 1023 | interactively wiping out any existing symbols. */ |
| 1024 | |
| 1025 | if ((have_full_symbols () || have_partial_symbols ()) |
| 1026 | && mainline |
| 1027 | && from_tty |
| 1028 | && !query ("Load new symbol table from \"%s\"? ", name)) |
| 1029 | error (_("Not confirmed.")); |
| 1030 | |
| 1031 | objfile = allocate_objfile (abfd, flags); |
| 1032 | discard_cleanups (my_cleanups); |
| 1033 | |
| 1034 | if (addrs) |
| 1035 | { |
| 1036 | orig_addrs = copy_section_addr_info (addrs); |
| 1037 | make_cleanup_free_section_addr_info (orig_addrs); |
| 1038 | } |
| 1039 | |
| 1040 | /* We either created a new mapped symbol table, mapped an existing |
| 1041 | symbol table file which has not had initial symbol reading |
| 1042 | performed, or need to read an unmapped symbol table. */ |
| 1043 | if (from_tty || info_verbose) |
| 1044 | { |
| 1045 | if (deprecated_pre_add_symbol_hook) |
| 1046 | deprecated_pre_add_symbol_hook (name); |
| 1047 | else |
| 1048 | { |
| 1049 | printf_unfiltered (_("Reading symbols from %s..."), name); |
| 1050 | wrap_here (""); |
| 1051 | gdb_flush (gdb_stdout); |
| 1052 | } |
| 1053 | } |
| 1054 | syms_from_objfile (objfile, addrs, offsets, num_offsets, |
| 1055 | mainline, from_tty); |
| 1056 | |
| 1057 | /* We now have at least a partial symbol table. Check to see if the |
| 1058 | user requested that all symbols be read on initial access via either |
| 1059 | the gdb startup command line or on a per symbol file basis. Expand |
| 1060 | all partial symbol tables for this objfile if so. */ |
| 1061 | |
| 1062 | if ((flags & OBJF_READNOW) || readnow_symbol_files) |
| 1063 | { |
| 1064 | if (from_tty || info_verbose) |
| 1065 | { |
| 1066 | printf_unfiltered (_("expanding to full symbols...")); |
| 1067 | wrap_here (""); |
| 1068 | gdb_flush (gdb_stdout); |
| 1069 | } |
| 1070 | |
| 1071 | for (psymtab = objfile->psymtabs; |
| 1072 | psymtab != NULL; |
| 1073 | psymtab = psymtab->next) |
| 1074 | { |
| 1075 | psymtab_to_symtab (psymtab); |
| 1076 | } |
| 1077 | } |
| 1078 | |
| 1079 | /* If the file has its own symbol tables it has no separate debug info. |
| 1080 | `.dynsym'/`.symtab' go to MSYMBOLS, `.debug_info' goes to SYMTABS/PSYMTABS. |
| 1081 | `.gnu_debuglink' may no longer be present with `.note.gnu.build-id'. */ |
| 1082 | if (objfile->psymtabs == NULL) |
| 1083 | debugfile = find_separate_debug_file (objfile); |
| 1084 | if (debugfile) |
| 1085 | { |
| 1086 | if (addrs != NULL) |
| 1087 | { |
| 1088 | objfile->separate_debug_objfile |
| 1089 | = symbol_file_add (debugfile, from_tty, orig_addrs, 0, flags); |
| 1090 | } |
| 1091 | else |
| 1092 | { |
| 1093 | objfile->separate_debug_objfile |
| 1094 | = symbol_file_add (debugfile, from_tty, NULL, 0, flags); |
| 1095 | } |
| 1096 | objfile->separate_debug_objfile->separate_debug_objfile_backlink |
| 1097 | = objfile; |
| 1098 | |
| 1099 | /* Put the separate debug object before the normal one, this is so that |
| 1100 | usage of the ALL_OBJFILES_SAFE macro will stay safe. */ |
| 1101 | put_objfile_before (objfile->separate_debug_objfile, objfile); |
| 1102 | |
| 1103 | xfree (debugfile); |
| 1104 | } |
| 1105 | |
| 1106 | if (!have_partial_symbols () && !have_full_symbols ()) |
| 1107 | { |
| 1108 | wrap_here (""); |
| 1109 | printf_filtered (_("(no debugging symbols found)")); |
| 1110 | if (from_tty || info_verbose) |
| 1111 | printf_filtered ("..."); |
| 1112 | else |
| 1113 | printf_filtered ("\n"); |
| 1114 | wrap_here (""); |
| 1115 | } |
| 1116 | |
| 1117 | if (from_tty || info_verbose) |
| 1118 | { |
| 1119 | if (deprecated_post_add_symbol_hook) |
| 1120 | deprecated_post_add_symbol_hook (); |
| 1121 | else |
| 1122 | { |
| 1123 | printf_unfiltered (_("done.\n")); |
| 1124 | } |
| 1125 | } |
| 1126 | |
| 1127 | /* We print some messages regardless of whether 'from_tty || |
| 1128 | info_verbose' is true, so make sure they go out at the right |
| 1129 | time. */ |
| 1130 | gdb_flush (gdb_stdout); |
| 1131 | |
| 1132 | do_cleanups (my_cleanups); |
| 1133 | |
| 1134 | if (objfile->sf == NULL) |
| 1135 | return objfile; /* No symbols. */ |
| 1136 | |
| 1137 | new_symfile_objfile (objfile, mainline, from_tty); |
| 1138 | |
| 1139 | observer_notify_new_objfile (objfile); |
| 1140 | |
| 1141 | bfd_cache_close_all (); |
| 1142 | return (objfile); |
| 1143 | } |
| 1144 | |
| 1145 | |
| 1146 | /* Process the symbol file ABFD, as either the main file or as a |
| 1147 | dynamically loaded file. |
| 1148 | |
| 1149 | See symbol_file_add_with_addrs_or_offsets's comments for |
| 1150 | details. */ |
| 1151 | struct objfile * |
| 1152 | symbol_file_add_from_bfd (bfd *abfd, int from_tty, |
| 1153 | struct section_addr_info *addrs, |
| 1154 | int mainline, int flags) |
| 1155 | { |
| 1156 | return symbol_file_add_with_addrs_or_offsets (abfd, |
| 1157 | from_tty, addrs, 0, 0, |
| 1158 | mainline, flags); |
| 1159 | } |
| 1160 | |
| 1161 | |
| 1162 | /* Process a symbol file, as either the main file or as a dynamically |
| 1163 | loaded file. See symbol_file_add_with_addrs_or_offsets's comments |
| 1164 | for details. */ |
| 1165 | struct objfile * |
| 1166 | symbol_file_add (char *name, int from_tty, struct section_addr_info *addrs, |
| 1167 | int mainline, int flags) |
| 1168 | { |
| 1169 | return symbol_file_add_from_bfd (symfile_bfd_open (name), from_tty, |
| 1170 | addrs, mainline, flags); |
| 1171 | } |
| 1172 | |
| 1173 | |
| 1174 | /* Call symbol_file_add() with default values and update whatever is |
| 1175 | affected by the loading of a new main(). |
| 1176 | Used when the file is supplied in the gdb command line |
| 1177 | and by some targets with special loading requirements. |
| 1178 | The auxiliary function, symbol_file_add_main_1(), has the flags |
| 1179 | argument for the switches that can only be specified in the symbol_file |
| 1180 | command itself. */ |
| 1181 | |
| 1182 | void |
| 1183 | symbol_file_add_main (char *args, int from_tty) |
| 1184 | { |
| 1185 | symbol_file_add_main_1 (args, from_tty, 0); |
| 1186 | } |
| 1187 | |
| 1188 | static void |
| 1189 | symbol_file_add_main_1 (char *args, int from_tty, int flags) |
| 1190 | { |
| 1191 | symbol_file_add (args, from_tty, NULL, 1, flags); |
| 1192 | |
| 1193 | /* Getting new symbols may change our opinion about |
| 1194 | what is frameless. */ |
| 1195 | reinit_frame_cache (); |
| 1196 | |
| 1197 | set_initial_language (); |
| 1198 | } |
| 1199 | |
| 1200 | void |
| 1201 | symbol_file_clear (int from_tty) |
| 1202 | { |
| 1203 | if ((have_full_symbols () || have_partial_symbols ()) |
| 1204 | && from_tty |
| 1205 | && (symfile_objfile |
| 1206 | ? !query (_("Discard symbol table from `%s'? "), |
| 1207 | symfile_objfile->name) |
| 1208 | : !query (_("Discard symbol table? ")))) |
| 1209 | error (_("Not confirmed.")); |
| 1210 | free_all_objfiles (); |
| 1211 | |
| 1212 | /* solib descriptors may have handles to objfiles. Since their |
| 1213 | storage has just been released, we'd better wipe the solib |
| 1214 | descriptors as well. |
| 1215 | */ |
| 1216 | no_shared_libraries (NULL, from_tty); |
| 1217 | |
| 1218 | symfile_objfile = NULL; |
| 1219 | if (from_tty) |
| 1220 | printf_unfiltered (_("No symbol file now.\n")); |
| 1221 | } |
| 1222 | |
| 1223 | struct build_id |
| 1224 | { |
| 1225 | size_t size; |
| 1226 | gdb_byte data[1]; |
| 1227 | }; |
| 1228 | |
| 1229 | /* Locate NT_GNU_BUILD_ID from ABFD and return its content. */ |
| 1230 | |
| 1231 | static struct build_id * |
| 1232 | build_id_bfd_get (bfd *abfd) |
| 1233 | { |
| 1234 | struct build_id *retval; |
| 1235 | |
| 1236 | if (!bfd_check_format (abfd, bfd_object) |
| 1237 | || bfd_get_flavour (abfd) != bfd_target_elf_flavour |
| 1238 | || elf_tdata (abfd)->build_id == NULL) |
| 1239 | return NULL; |
| 1240 | |
| 1241 | retval = xmalloc (sizeof *retval - 1 + elf_tdata (abfd)->build_id_size); |
| 1242 | retval->size = elf_tdata (abfd)->build_id_size; |
| 1243 | memcpy (retval->data, elf_tdata (abfd)->build_id, retval->size); |
| 1244 | |
| 1245 | return retval; |
| 1246 | } |
| 1247 | |
| 1248 | /* Return if FILENAME has NT_GNU_BUILD_ID matching the CHECK value. */ |
| 1249 | |
| 1250 | static int |
| 1251 | build_id_verify (const char *filename, struct build_id *check) |
| 1252 | { |
| 1253 | bfd *abfd; |
| 1254 | struct build_id *found = NULL; |
| 1255 | int retval = 0; |
| 1256 | |
| 1257 | /* We expect to be silent on the non-existing files. */ |
| 1258 | abfd = bfd_openr (filename, gnutarget); |
| 1259 | if (abfd == NULL) |
| 1260 | return 0; |
| 1261 | |
| 1262 | found = build_id_bfd_get (abfd); |
| 1263 | |
| 1264 | if (found == NULL) |
| 1265 | warning (_("File \"%s\" has no build-id, file skipped"), filename); |
| 1266 | else if (found->size != check->size |
| 1267 | || memcmp (found->data, check->data, found->size) != 0) |
| 1268 | warning (_("File \"%s\" has a different build-id, file skipped"), filename); |
| 1269 | else |
| 1270 | retval = 1; |
| 1271 | |
| 1272 | if (!bfd_close (abfd)) |
| 1273 | warning (_("cannot close \"%s\": %s"), filename, |
| 1274 | bfd_errmsg (bfd_get_error ())); |
| 1275 | return retval; |
| 1276 | } |
| 1277 | |
| 1278 | static char * |
| 1279 | build_id_to_debug_filename (struct build_id *build_id) |
| 1280 | { |
| 1281 | char *link, *s, *retval = NULL; |
| 1282 | gdb_byte *data = build_id->data; |
| 1283 | size_t size = build_id->size; |
| 1284 | |
| 1285 | /* DEBUG_FILE_DIRECTORY/.build-id/ab/cdef */ |
| 1286 | link = xmalloc (strlen (debug_file_directory) + (sizeof "/.build-id/" - 1) + 1 |
| 1287 | + 2 * size + (sizeof ".debug" - 1) + 1); |
| 1288 | s = link + sprintf (link, "%s/.build-id/", debug_file_directory); |
| 1289 | if (size > 0) |
| 1290 | { |
| 1291 | size--; |
| 1292 | s += sprintf (s, "%02x", (unsigned) *data++); |
| 1293 | } |
| 1294 | if (size > 0) |
| 1295 | *s++ = '/'; |
| 1296 | while (size-- > 0) |
| 1297 | s += sprintf (s, "%02x", (unsigned) *data++); |
| 1298 | strcpy (s, ".debug"); |
| 1299 | |
| 1300 | /* lrealpath() is expensive even for the usually non-existent files. */ |
| 1301 | if (access (link, F_OK) == 0) |
| 1302 | retval = lrealpath (link); |
| 1303 | xfree (link); |
| 1304 | |
| 1305 | if (retval != NULL && !build_id_verify (retval, build_id)) |
| 1306 | { |
| 1307 | xfree (retval); |
| 1308 | retval = NULL; |
| 1309 | } |
| 1310 | |
| 1311 | return retval; |
| 1312 | } |
| 1313 | |
| 1314 | static char * |
| 1315 | get_debug_link_info (struct objfile *objfile, unsigned long *crc32_out) |
| 1316 | { |
| 1317 | asection *sect; |
| 1318 | bfd_size_type debuglink_size; |
| 1319 | unsigned long crc32; |
| 1320 | char *contents; |
| 1321 | int crc_offset; |
| 1322 | unsigned char *p; |
| 1323 | |
| 1324 | sect = bfd_get_section_by_name (objfile->obfd, ".gnu_debuglink"); |
| 1325 | |
| 1326 | if (sect == NULL) |
| 1327 | return NULL; |
| 1328 | |
| 1329 | debuglink_size = bfd_section_size (objfile->obfd, sect); |
| 1330 | |
| 1331 | contents = xmalloc (debuglink_size); |
| 1332 | bfd_get_section_contents (objfile->obfd, sect, contents, |
| 1333 | (file_ptr)0, (bfd_size_type)debuglink_size); |
| 1334 | |
| 1335 | /* Crc value is stored after the filename, aligned up to 4 bytes. */ |
| 1336 | crc_offset = strlen (contents) + 1; |
| 1337 | crc_offset = (crc_offset + 3) & ~3; |
| 1338 | |
| 1339 | crc32 = bfd_get_32 (objfile->obfd, (bfd_byte *) (contents + crc_offset)); |
| 1340 | |
| 1341 | *crc32_out = crc32; |
| 1342 | return contents; |
| 1343 | } |
| 1344 | |
| 1345 | static int |
| 1346 | separate_debug_file_exists (const char *name, unsigned long crc) |
| 1347 | { |
| 1348 | unsigned long file_crc = 0; |
| 1349 | int fd; |
| 1350 | gdb_byte buffer[8*1024]; |
| 1351 | int count; |
| 1352 | |
| 1353 | fd = open (name, O_RDONLY | O_BINARY); |
| 1354 | if (fd < 0) |
| 1355 | return 0; |
| 1356 | |
| 1357 | while ((count = read (fd, buffer, sizeof (buffer))) > 0) |
| 1358 | file_crc = gnu_debuglink_crc32 (file_crc, buffer, count); |
| 1359 | |
| 1360 | close (fd); |
| 1361 | |
| 1362 | return crc == file_crc; |
| 1363 | } |
| 1364 | |
| 1365 | char *debug_file_directory = NULL; |
| 1366 | static void |
| 1367 | show_debug_file_directory (struct ui_file *file, int from_tty, |
| 1368 | struct cmd_list_element *c, const char *value) |
| 1369 | { |
| 1370 | fprintf_filtered (file, _("\ |
| 1371 | The directory where separate debug symbols are searched for is \"%s\".\n"), |
| 1372 | value); |
| 1373 | } |
| 1374 | |
| 1375 | #if ! defined (DEBUG_SUBDIRECTORY) |
| 1376 | #define DEBUG_SUBDIRECTORY ".debug" |
| 1377 | #endif |
| 1378 | |
| 1379 | static char * |
| 1380 | find_separate_debug_file (struct objfile *objfile) |
| 1381 | { |
| 1382 | asection *sect; |
| 1383 | char *basename; |
| 1384 | char *dir; |
| 1385 | char *debugfile; |
| 1386 | char *name_copy; |
| 1387 | char *canon_name; |
| 1388 | bfd_size_type debuglink_size; |
| 1389 | unsigned long crc32; |
| 1390 | int i; |
| 1391 | struct build_id *build_id; |
| 1392 | |
| 1393 | build_id = build_id_bfd_get (objfile->obfd); |
| 1394 | if (build_id != NULL) |
| 1395 | { |
| 1396 | char *build_id_name; |
| 1397 | |
| 1398 | build_id_name = build_id_to_debug_filename (build_id); |
| 1399 | free (build_id); |
| 1400 | /* Prevent looping on a stripped .debug file. */ |
| 1401 | if (build_id_name != NULL && strcmp (build_id_name, objfile->name) == 0) |
| 1402 | { |
| 1403 | warning (_("\"%s\": separate debug info file has no debug info"), |
| 1404 | build_id_name); |
| 1405 | xfree (build_id_name); |
| 1406 | } |
| 1407 | else if (build_id_name != NULL) |
| 1408 | return build_id_name; |
| 1409 | } |
| 1410 | |
| 1411 | basename = get_debug_link_info (objfile, &crc32); |
| 1412 | |
| 1413 | if (basename == NULL) |
| 1414 | return NULL; |
| 1415 | |
| 1416 | dir = xstrdup (objfile->name); |
| 1417 | |
| 1418 | /* Strip off the final filename part, leaving the directory name, |
| 1419 | followed by a slash. Objfile names should always be absolute and |
| 1420 | tilde-expanded, so there should always be a slash in there |
| 1421 | somewhere. */ |
| 1422 | for (i = strlen(dir) - 1; i >= 0; i--) |
| 1423 | { |
| 1424 | if (IS_DIR_SEPARATOR (dir[i])) |
| 1425 | break; |
| 1426 | } |
| 1427 | gdb_assert (i >= 0 && IS_DIR_SEPARATOR (dir[i])); |
| 1428 | dir[i+1] = '\0'; |
| 1429 | |
| 1430 | debugfile = alloca (strlen (debug_file_directory) + 1 |
| 1431 | + strlen (dir) |
| 1432 | + strlen (DEBUG_SUBDIRECTORY) |
| 1433 | + strlen ("/") |
| 1434 | + strlen (basename) |
| 1435 | + 1); |
| 1436 | |
| 1437 | /* First try in the same directory as the original file. */ |
| 1438 | strcpy (debugfile, dir); |
| 1439 | strcat (debugfile, basename); |
| 1440 | |
| 1441 | if (separate_debug_file_exists (debugfile, crc32)) |
| 1442 | { |
| 1443 | xfree (basename); |
| 1444 | xfree (dir); |
| 1445 | return xstrdup (debugfile); |
| 1446 | } |
| 1447 | |
| 1448 | /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */ |
| 1449 | strcpy (debugfile, dir); |
| 1450 | strcat (debugfile, DEBUG_SUBDIRECTORY); |
| 1451 | strcat (debugfile, "/"); |
| 1452 | strcat (debugfile, basename); |
| 1453 | |
| 1454 | if (separate_debug_file_exists (debugfile, crc32)) |
| 1455 | { |
| 1456 | xfree (basename); |
| 1457 | xfree (dir); |
| 1458 | return xstrdup (debugfile); |
| 1459 | } |
| 1460 | |
| 1461 | /* Then try in the global debugfile directory. */ |
| 1462 | strcpy (debugfile, debug_file_directory); |
| 1463 | strcat (debugfile, "/"); |
| 1464 | strcat (debugfile, dir); |
| 1465 | strcat (debugfile, basename); |
| 1466 | |
| 1467 | if (separate_debug_file_exists (debugfile, crc32)) |
| 1468 | { |
| 1469 | xfree (basename); |
| 1470 | xfree (dir); |
| 1471 | return xstrdup (debugfile); |
| 1472 | } |
| 1473 | |
| 1474 | /* If the file is in the sysroot, try using its base path in the |
| 1475 | global debugfile directory. */ |
| 1476 | canon_name = lrealpath (dir); |
| 1477 | if (canon_name |
| 1478 | && strncmp (canon_name, gdb_sysroot, strlen (gdb_sysroot)) == 0 |
| 1479 | && IS_DIR_SEPARATOR (canon_name[strlen (gdb_sysroot)])) |
| 1480 | { |
| 1481 | strcpy (debugfile, debug_file_directory); |
| 1482 | strcat (debugfile, canon_name + strlen (gdb_sysroot)); |
| 1483 | strcat (debugfile, "/"); |
| 1484 | strcat (debugfile, basename); |
| 1485 | |
| 1486 | if (separate_debug_file_exists (debugfile, crc32)) |
| 1487 | { |
| 1488 | xfree (canon_name); |
| 1489 | xfree (basename); |
| 1490 | xfree (dir); |
| 1491 | return xstrdup (debugfile); |
| 1492 | } |
| 1493 | } |
| 1494 | |
| 1495 | if (canon_name) |
| 1496 | xfree (canon_name); |
| 1497 | |
| 1498 | xfree (basename); |
| 1499 | xfree (dir); |
| 1500 | return NULL; |
| 1501 | } |
| 1502 | |
| 1503 | |
| 1504 | /* This is the symbol-file command. Read the file, analyze its |
| 1505 | symbols, and add a struct symtab to a symtab list. The syntax of |
| 1506 | the command is rather bizarre: |
| 1507 | |
| 1508 | 1. The function buildargv implements various quoting conventions |
| 1509 | which are undocumented and have little or nothing in common with |
| 1510 | the way things are quoted (or not quoted) elsewhere in GDB. |
| 1511 | |
| 1512 | 2. Options are used, which are not generally used in GDB (perhaps |
| 1513 | "set mapped on", "set readnow on" would be better) |
| 1514 | |
| 1515 | 3. The order of options matters, which is contrary to GNU |
| 1516 | conventions (because it is confusing and inconvenient). */ |
| 1517 | |
| 1518 | void |
| 1519 | symbol_file_command (char *args, int from_tty) |
| 1520 | { |
| 1521 | dont_repeat (); |
| 1522 | |
| 1523 | if (args == NULL) |
| 1524 | { |
| 1525 | symbol_file_clear (from_tty); |
| 1526 | } |
| 1527 | else |
| 1528 | { |
| 1529 | char **argv = buildargv (args); |
| 1530 | int flags = OBJF_USERLOADED; |
| 1531 | struct cleanup *cleanups; |
| 1532 | char *name = NULL; |
| 1533 | |
| 1534 | if (argv == NULL) |
| 1535 | nomem (0); |
| 1536 | |
| 1537 | cleanups = make_cleanup_freeargv (argv); |
| 1538 | while (*argv != NULL) |
| 1539 | { |
| 1540 | if (strcmp (*argv, "-readnow") == 0) |
| 1541 | flags |= OBJF_READNOW; |
| 1542 | else if (**argv == '-') |
| 1543 | error (_("unknown option `%s'"), *argv); |
| 1544 | else |
| 1545 | { |
| 1546 | symbol_file_add_main_1 (*argv, from_tty, flags); |
| 1547 | name = *argv; |
| 1548 | } |
| 1549 | |
| 1550 | argv++; |
| 1551 | } |
| 1552 | |
| 1553 | if (name == NULL) |
| 1554 | error (_("no symbol file name was specified")); |
| 1555 | |
| 1556 | do_cleanups (cleanups); |
| 1557 | } |
| 1558 | } |
| 1559 | |
| 1560 | /* Set the initial language. |
| 1561 | |
| 1562 | FIXME: A better solution would be to record the language in the |
| 1563 | psymtab when reading partial symbols, and then use it (if known) to |
| 1564 | set the language. This would be a win for formats that encode the |
| 1565 | language in an easily discoverable place, such as DWARF. For |
| 1566 | stabs, we can jump through hoops looking for specially named |
| 1567 | symbols or try to intuit the language from the specific type of |
| 1568 | stabs we find, but we can't do that until later when we read in |
| 1569 | full symbols. */ |
| 1570 | |
| 1571 | void |
| 1572 | set_initial_language (void) |
| 1573 | { |
| 1574 | struct partial_symtab *pst; |
| 1575 | enum language lang = language_unknown; |
| 1576 | |
| 1577 | pst = find_main_psymtab (); |
| 1578 | if (pst != NULL) |
| 1579 | { |
| 1580 | if (pst->filename != NULL) |
| 1581 | lang = deduce_language_from_filename (pst->filename); |
| 1582 | |
| 1583 | if (lang == language_unknown) |
| 1584 | { |
| 1585 | /* Make C the default language */ |
| 1586 | lang = language_c; |
| 1587 | } |
| 1588 | |
| 1589 | set_language (lang); |
| 1590 | expected_language = current_language; /* Don't warn the user. */ |
| 1591 | } |
| 1592 | } |
| 1593 | |
| 1594 | /* Open the file specified by NAME and hand it off to BFD for |
| 1595 | preliminary analysis. Return a newly initialized bfd *, which |
| 1596 | includes a newly malloc'd` copy of NAME (tilde-expanded and made |
| 1597 | absolute). In case of trouble, error() is called. */ |
| 1598 | |
| 1599 | bfd * |
| 1600 | symfile_bfd_open (char *name) |
| 1601 | { |
| 1602 | bfd *sym_bfd; |
| 1603 | int desc; |
| 1604 | char *absolute_name; |
| 1605 | |
| 1606 | name = tilde_expand (name); /* Returns 1st new malloc'd copy. */ |
| 1607 | |
| 1608 | /* Look down path for it, allocate 2nd new malloc'd copy. */ |
| 1609 | desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, name, |
| 1610 | O_RDONLY | O_BINARY, 0, &absolute_name); |
| 1611 | #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__) |
| 1612 | if (desc < 0) |
| 1613 | { |
| 1614 | char *exename = alloca (strlen (name) + 5); |
| 1615 | strcat (strcpy (exename, name), ".exe"); |
| 1616 | desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, exename, |
| 1617 | O_RDONLY | O_BINARY, 0, &absolute_name); |
| 1618 | } |
| 1619 | #endif |
| 1620 | if (desc < 0) |
| 1621 | { |
| 1622 | make_cleanup (xfree, name); |
| 1623 | perror_with_name (name); |
| 1624 | } |
| 1625 | |
| 1626 | /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in |
| 1627 | bfd. It'll be freed in free_objfile(). */ |
| 1628 | xfree (name); |
| 1629 | name = absolute_name; |
| 1630 | |
| 1631 | sym_bfd = bfd_fopen (name, gnutarget, FOPEN_RB, desc); |
| 1632 | if (!sym_bfd) |
| 1633 | { |
| 1634 | close (desc); |
| 1635 | make_cleanup (xfree, name); |
| 1636 | error (_("\"%s\": can't open to read symbols: %s."), name, |
| 1637 | bfd_errmsg (bfd_get_error ())); |
| 1638 | } |
| 1639 | bfd_set_cacheable (sym_bfd, 1); |
| 1640 | |
| 1641 | if (!bfd_check_format (sym_bfd, bfd_object)) |
| 1642 | { |
| 1643 | /* FIXME: should be checking for errors from bfd_close (for one |
| 1644 | thing, on error it does not free all the storage associated |
| 1645 | with the bfd). */ |
| 1646 | bfd_close (sym_bfd); /* This also closes desc. */ |
| 1647 | make_cleanup (xfree, name); |
| 1648 | error (_("\"%s\": can't read symbols: %s."), name, |
| 1649 | bfd_errmsg (bfd_get_error ())); |
| 1650 | } |
| 1651 | |
| 1652 | return sym_bfd; |
| 1653 | } |
| 1654 | |
| 1655 | /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if |
| 1656 | the section was not found. */ |
| 1657 | |
| 1658 | int |
| 1659 | get_section_index (struct objfile *objfile, char *section_name) |
| 1660 | { |
| 1661 | asection *sect = bfd_get_section_by_name (objfile->obfd, section_name); |
| 1662 | |
| 1663 | if (sect) |
| 1664 | return sect->index; |
| 1665 | else |
| 1666 | return -1; |
| 1667 | } |
| 1668 | |
| 1669 | /* Link SF into the global symtab_fns list. Called on startup by the |
| 1670 | _initialize routine in each object file format reader, to register |
| 1671 | information about each format the the reader is prepared to |
| 1672 | handle. */ |
| 1673 | |
| 1674 | void |
| 1675 | add_symtab_fns (struct sym_fns *sf) |
| 1676 | { |
| 1677 | sf->next = symtab_fns; |
| 1678 | symtab_fns = sf; |
| 1679 | } |
| 1680 | |
| 1681 | /* Initialize OBJFILE to read symbols from its associated BFD. It |
| 1682 | either returns or calls error(). The result is an initialized |
| 1683 | struct sym_fns in the objfile structure, that contains cached |
| 1684 | information about the symbol file. */ |
| 1685 | |
| 1686 | static struct sym_fns * |
| 1687 | find_sym_fns (bfd *abfd) |
| 1688 | { |
| 1689 | struct sym_fns *sf; |
| 1690 | enum bfd_flavour our_flavour = bfd_get_flavour (abfd); |
| 1691 | |
| 1692 | if (our_flavour == bfd_target_srec_flavour |
| 1693 | || our_flavour == bfd_target_ihex_flavour |
| 1694 | || our_flavour == bfd_target_tekhex_flavour) |
| 1695 | return NULL; /* No symbols. */ |
| 1696 | |
| 1697 | for (sf = symtab_fns; sf != NULL; sf = sf->next) |
| 1698 | if (our_flavour == sf->sym_flavour) |
| 1699 | return sf; |
| 1700 | |
| 1701 | error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."), |
| 1702 | bfd_get_target (abfd)); |
| 1703 | } |
| 1704 | \f |
| 1705 | |
| 1706 | /* This function runs the load command of our current target. */ |
| 1707 | |
| 1708 | static void |
| 1709 | load_command (char *arg, int from_tty) |
| 1710 | { |
| 1711 | if (arg == NULL) |
| 1712 | { |
| 1713 | char *parg; |
| 1714 | int count = 0; |
| 1715 | |
| 1716 | parg = arg = get_exec_file (1); |
| 1717 | |
| 1718 | /* Count how many \ " ' tab space there are in the name. */ |
| 1719 | while ((parg = strpbrk (parg, "\\\"'\t "))) |
| 1720 | { |
| 1721 | parg++; |
| 1722 | count++; |
| 1723 | } |
| 1724 | |
| 1725 | if (count) |
| 1726 | { |
| 1727 | /* We need to quote this string so buildargv can pull it apart. */ |
| 1728 | char *temp = xmalloc (strlen (arg) + count + 1 ); |
| 1729 | char *ptemp = temp; |
| 1730 | char *prev; |
| 1731 | |
| 1732 | make_cleanup (xfree, temp); |
| 1733 | |
| 1734 | prev = parg = arg; |
| 1735 | while ((parg = strpbrk (parg, "\\\"'\t "))) |
| 1736 | { |
| 1737 | strncpy (ptemp, prev, parg - prev); |
| 1738 | ptemp += parg - prev; |
| 1739 | prev = parg++; |
| 1740 | *ptemp++ = '\\'; |
| 1741 | } |
| 1742 | strcpy (ptemp, prev); |
| 1743 | |
| 1744 | arg = temp; |
| 1745 | } |
| 1746 | } |
| 1747 | |
| 1748 | /* The user might be reloading because the binary has changed. Take |
| 1749 | this opportunity to check. */ |
| 1750 | reopen_exec_file (); |
| 1751 | reread_symbols (); |
| 1752 | |
| 1753 | target_load (arg, from_tty); |
| 1754 | |
| 1755 | /* After re-loading the executable, we don't really know which |
| 1756 | overlays are mapped any more. */ |
| 1757 | overlay_cache_invalid = 1; |
| 1758 | } |
| 1759 | |
| 1760 | /* This version of "load" should be usable for any target. Currently |
| 1761 | it is just used for remote targets, not inftarg.c or core files, |
| 1762 | on the theory that only in that case is it useful. |
| 1763 | |
| 1764 | Avoiding xmodem and the like seems like a win (a) because we don't have |
| 1765 | to worry about finding it, and (b) On VMS, fork() is very slow and so |
| 1766 | we don't want to run a subprocess. On the other hand, I'm not sure how |
| 1767 | performance compares. */ |
| 1768 | |
| 1769 | static int validate_download = 0; |
| 1770 | |
| 1771 | /* Callback service function for generic_load (bfd_map_over_sections). */ |
| 1772 | |
| 1773 | static void |
| 1774 | add_section_size_callback (bfd *abfd, asection *asec, void *data) |
| 1775 | { |
| 1776 | bfd_size_type *sum = data; |
| 1777 | |
| 1778 | *sum += bfd_get_section_size (asec); |
| 1779 | } |
| 1780 | |
| 1781 | /* Opaque data for load_section_callback. */ |
| 1782 | struct load_section_data { |
| 1783 | unsigned long load_offset; |
| 1784 | struct load_progress_data *progress_data; |
| 1785 | VEC(memory_write_request_s) *requests; |
| 1786 | }; |
| 1787 | |
| 1788 | /* Opaque data for load_progress. */ |
| 1789 | struct load_progress_data { |
| 1790 | /* Cumulative data. */ |
| 1791 | unsigned long write_count; |
| 1792 | unsigned long data_count; |
| 1793 | bfd_size_type total_size; |
| 1794 | }; |
| 1795 | |
| 1796 | /* Opaque data for load_progress for a single section. */ |
| 1797 | struct load_progress_section_data { |
| 1798 | struct load_progress_data *cumulative; |
| 1799 | |
| 1800 | /* Per-section data. */ |
| 1801 | const char *section_name; |
| 1802 | ULONGEST section_sent; |
| 1803 | ULONGEST section_size; |
| 1804 | CORE_ADDR lma; |
| 1805 | gdb_byte *buffer; |
| 1806 | }; |
| 1807 | |
| 1808 | /* Target write callback routine for progress reporting. */ |
| 1809 | |
| 1810 | static void |
| 1811 | load_progress (ULONGEST bytes, void *untyped_arg) |
| 1812 | { |
| 1813 | struct load_progress_section_data *args = untyped_arg; |
| 1814 | struct load_progress_data *totals; |
| 1815 | |
| 1816 | if (args == NULL) |
| 1817 | /* Writing padding data. No easy way to get at the cumulative |
| 1818 | stats, so just ignore this. */ |
| 1819 | return; |
| 1820 | |
| 1821 | totals = args->cumulative; |
| 1822 | |
| 1823 | if (bytes == 0 && args->section_sent == 0) |
| 1824 | { |
| 1825 | /* The write is just starting. Let the user know we've started |
| 1826 | this section. */ |
| 1827 | ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n", |
| 1828 | args->section_name, paddr_nz (args->section_size), |
| 1829 | paddr_nz (args->lma)); |
| 1830 | return; |
| 1831 | } |
| 1832 | |
| 1833 | if (validate_download) |
| 1834 | { |
| 1835 | /* Broken memories and broken monitors manifest themselves here |
| 1836 | when bring new computers to life. This doubles already slow |
| 1837 | downloads. */ |
| 1838 | /* NOTE: cagney/1999-10-18: A more efficient implementation |
| 1839 | might add a verify_memory() method to the target vector and |
| 1840 | then use that. remote.c could implement that method using |
| 1841 | the ``qCRC'' packet. */ |
| 1842 | gdb_byte *check = xmalloc (bytes); |
| 1843 | struct cleanup *verify_cleanups = make_cleanup (xfree, check); |
| 1844 | |
| 1845 | if (target_read_memory (args->lma, check, bytes) != 0) |
| 1846 | error (_("Download verify read failed at 0x%s"), |
| 1847 | paddr (args->lma)); |
| 1848 | if (memcmp (args->buffer, check, bytes) != 0) |
| 1849 | error (_("Download verify compare failed at 0x%s"), |
| 1850 | paddr (args->lma)); |
| 1851 | do_cleanups (verify_cleanups); |
| 1852 | } |
| 1853 | totals->data_count += bytes; |
| 1854 | args->lma += bytes; |
| 1855 | args->buffer += bytes; |
| 1856 | totals->write_count += 1; |
| 1857 | args->section_sent += bytes; |
| 1858 | if (quit_flag |
| 1859 | || (deprecated_ui_load_progress_hook != NULL |
| 1860 | && deprecated_ui_load_progress_hook (args->section_name, |
| 1861 | args->section_sent))) |
| 1862 | error (_("Canceled the download")); |
| 1863 | |
| 1864 | if (deprecated_show_load_progress != NULL) |
| 1865 | deprecated_show_load_progress (args->section_name, |
| 1866 | args->section_sent, |
| 1867 | args->section_size, |
| 1868 | totals->data_count, |
| 1869 | totals->total_size); |
| 1870 | } |
| 1871 | |
| 1872 | /* Callback service function for generic_load (bfd_map_over_sections). */ |
| 1873 | |
| 1874 | static void |
| 1875 | load_section_callback (bfd *abfd, asection *asec, void *data) |
| 1876 | { |
| 1877 | struct memory_write_request *new_request; |
| 1878 | struct load_section_data *args = data; |
| 1879 | struct load_progress_section_data *section_data; |
| 1880 | bfd_size_type size = bfd_get_section_size (asec); |
| 1881 | gdb_byte *buffer; |
| 1882 | const char *sect_name = bfd_get_section_name (abfd, asec); |
| 1883 | |
| 1884 | if ((bfd_get_section_flags (abfd, asec) & SEC_LOAD) == 0) |
| 1885 | return; |
| 1886 | |
| 1887 | if (size == 0) |
| 1888 | return; |
| 1889 | |
| 1890 | new_request = VEC_safe_push (memory_write_request_s, |
| 1891 | args->requests, NULL); |
| 1892 | memset (new_request, 0, sizeof (struct memory_write_request)); |
| 1893 | section_data = xcalloc (1, sizeof (struct load_progress_section_data)); |
| 1894 | new_request->begin = bfd_section_lma (abfd, asec) + args->load_offset; |
| 1895 | new_request->end = new_request->begin + size; /* FIXME Should size be in instead? */ |
| 1896 | new_request->data = xmalloc (size); |
| 1897 | new_request->baton = section_data; |
| 1898 | |
| 1899 | buffer = new_request->data; |
| 1900 | |
| 1901 | section_data->cumulative = args->progress_data; |
| 1902 | section_data->section_name = sect_name; |
| 1903 | section_data->section_size = size; |
| 1904 | section_data->lma = new_request->begin; |
| 1905 | section_data->buffer = buffer; |
| 1906 | |
| 1907 | bfd_get_section_contents (abfd, asec, buffer, 0, size); |
| 1908 | } |
| 1909 | |
| 1910 | /* Clean up an entire memory request vector, including load |
| 1911 | data and progress records. */ |
| 1912 | |
| 1913 | static void |
| 1914 | clear_memory_write_data (void *arg) |
| 1915 | { |
| 1916 | VEC(memory_write_request_s) **vec_p = arg; |
| 1917 | VEC(memory_write_request_s) *vec = *vec_p; |
| 1918 | int i; |
| 1919 | struct memory_write_request *mr; |
| 1920 | |
| 1921 | for (i = 0; VEC_iterate (memory_write_request_s, vec, i, mr); ++i) |
| 1922 | { |
| 1923 | xfree (mr->data); |
| 1924 | xfree (mr->baton); |
| 1925 | } |
| 1926 | VEC_free (memory_write_request_s, vec); |
| 1927 | } |
| 1928 | |
| 1929 | void |
| 1930 | generic_load (char *args, int from_tty) |
| 1931 | { |
| 1932 | bfd *loadfile_bfd; |
| 1933 | struct timeval start_time, end_time; |
| 1934 | char *filename; |
| 1935 | struct cleanup *old_cleanups = make_cleanup (null_cleanup, 0); |
| 1936 | struct load_section_data cbdata; |
| 1937 | struct load_progress_data total_progress; |
| 1938 | |
| 1939 | CORE_ADDR entry; |
| 1940 | char **argv; |
| 1941 | |
| 1942 | memset (&cbdata, 0, sizeof (cbdata)); |
| 1943 | memset (&total_progress, 0, sizeof (total_progress)); |
| 1944 | cbdata.progress_data = &total_progress; |
| 1945 | |
| 1946 | make_cleanup (clear_memory_write_data, &cbdata.requests); |
| 1947 | |
| 1948 | argv = buildargv (args); |
| 1949 | |
| 1950 | if (argv == NULL) |
| 1951 | nomem(0); |
| 1952 | |
| 1953 | make_cleanup_freeargv (argv); |
| 1954 | |
| 1955 | filename = tilde_expand (argv[0]); |
| 1956 | make_cleanup (xfree, filename); |
| 1957 | |
| 1958 | if (argv[1] != NULL) |
| 1959 | { |
| 1960 | char *endptr; |
| 1961 | |
| 1962 | cbdata.load_offset = strtoul (argv[1], &endptr, 0); |
| 1963 | |
| 1964 | /* If the last word was not a valid number then |
| 1965 | treat it as a file name with spaces in. */ |
| 1966 | if (argv[1] == endptr) |
| 1967 | error (_("Invalid download offset:%s."), argv[1]); |
| 1968 | |
| 1969 | if (argv[2] != NULL) |
| 1970 | error (_("Too many parameters.")); |
| 1971 | } |
| 1972 | |
| 1973 | /* Open the file for loading. */ |
| 1974 | loadfile_bfd = bfd_openr (filename, gnutarget); |
| 1975 | if (loadfile_bfd == NULL) |
| 1976 | { |
| 1977 | perror_with_name (filename); |
| 1978 | return; |
| 1979 | } |
| 1980 | |
| 1981 | /* FIXME: should be checking for errors from bfd_close (for one thing, |
| 1982 | on error it does not free all the storage associated with the |
| 1983 | bfd). */ |
| 1984 | make_cleanup_bfd_close (loadfile_bfd); |
| 1985 | |
| 1986 | if (!bfd_check_format (loadfile_bfd, bfd_object)) |
| 1987 | { |
| 1988 | error (_("\"%s\" is not an object file: %s"), filename, |
| 1989 | bfd_errmsg (bfd_get_error ())); |
| 1990 | } |
| 1991 | |
| 1992 | bfd_map_over_sections (loadfile_bfd, add_section_size_callback, |
| 1993 | (void *) &total_progress.total_size); |
| 1994 | |
| 1995 | bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata); |
| 1996 | |
| 1997 | gettimeofday (&start_time, NULL); |
| 1998 | |
| 1999 | if (target_write_memory_blocks (cbdata.requests, flash_discard, |
| 2000 | load_progress) != 0) |
| 2001 | error (_("Load failed")); |
| 2002 | |
| 2003 | gettimeofday (&end_time, NULL); |
| 2004 | |
| 2005 | entry = bfd_get_start_address (loadfile_bfd); |
| 2006 | ui_out_text (uiout, "Start address "); |
| 2007 | ui_out_field_fmt (uiout, "address", "0x%s", paddr_nz (entry)); |
| 2008 | ui_out_text (uiout, ", load size "); |
| 2009 | ui_out_field_fmt (uiout, "load-size", "%lu", total_progress.data_count); |
| 2010 | ui_out_text (uiout, "\n"); |
| 2011 | /* We were doing this in remote-mips.c, I suspect it is right |
| 2012 | for other targets too. */ |
| 2013 | write_pc (entry); |
| 2014 | |
| 2015 | /* FIXME: are we supposed to call symbol_file_add or not? According |
| 2016 | to a comment from remote-mips.c (where a call to symbol_file_add |
| 2017 | was commented out), making the call confuses GDB if more than one |
| 2018 | file is loaded in. Some targets do (e.g., remote-vx.c) but |
| 2019 | others don't (or didn't - perhaps they have all been deleted). */ |
| 2020 | |
| 2021 | print_transfer_performance (gdb_stdout, total_progress.data_count, |
| 2022 | total_progress.write_count, |
| 2023 | &start_time, &end_time); |
| 2024 | |
| 2025 | do_cleanups (old_cleanups); |
| 2026 | } |
| 2027 | |
| 2028 | /* Report how fast the transfer went. */ |
| 2029 | |
| 2030 | /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being |
| 2031 | replaced by print_transfer_performance (with a very different |
| 2032 | function signature). */ |
| 2033 | |
| 2034 | void |
| 2035 | report_transfer_performance (unsigned long data_count, time_t start_time, |
| 2036 | time_t end_time) |
| 2037 | { |
| 2038 | struct timeval start, end; |
| 2039 | |
| 2040 | start.tv_sec = start_time; |
| 2041 | start.tv_usec = 0; |
| 2042 | end.tv_sec = end_time; |
| 2043 | end.tv_usec = 0; |
| 2044 | |
| 2045 | print_transfer_performance (gdb_stdout, data_count, 0, &start, &end); |
| 2046 | } |
| 2047 | |
| 2048 | void |
| 2049 | print_transfer_performance (struct ui_file *stream, |
| 2050 | unsigned long data_count, |
| 2051 | unsigned long write_count, |
| 2052 | const struct timeval *start_time, |
| 2053 | const struct timeval *end_time) |
| 2054 | { |
| 2055 | ULONGEST time_count; |
| 2056 | |
| 2057 | /* Compute the elapsed time in milliseconds, as a tradeoff between |
| 2058 | accuracy and overflow. */ |
| 2059 | time_count = (end_time->tv_sec - start_time->tv_sec) * 1000; |
| 2060 | time_count += (end_time->tv_usec - start_time->tv_usec) / 1000; |
| 2061 | |
| 2062 | ui_out_text (uiout, "Transfer rate: "); |
| 2063 | if (time_count > 0) |
| 2064 | { |
| 2065 | unsigned long rate = ((ULONGEST) data_count * 1000) / time_count; |
| 2066 | |
| 2067 | if (ui_out_is_mi_like_p (uiout)) |
| 2068 | { |
| 2069 | ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate * 8); |
| 2070 | ui_out_text (uiout, " bits/sec"); |
| 2071 | } |
| 2072 | else if (rate < 1024) |
| 2073 | { |
| 2074 | ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate); |
| 2075 | ui_out_text (uiout, " bytes/sec"); |
| 2076 | } |
| 2077 | else |
| 2078 | { |
| 2079 | ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate / 1024); |
| 2080 | ui_out_text (uiout, " KB/sec"); |
| 2081 | } |
| 2082 | } |
| 2083 | else |
| 2084 | { |
| 2085 | ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8)); |
| 2086 | ui_out_text (uiout, " bits in <1 sec"); |
| 2087 | } |
| 2088 | if (write_count > 0) |
| 2089 | { |
| 2090 | ui_out_text (uiout, ", "); |
| 2091 | ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count); |
| 2092 | ui_out_text (uiout, " bytes/write"); |
| 2093 | } |
| 2094 | ui_out_text (uiout, ".\n"); |
| 2095 | } |
| 2096 | |
| 2097 | /* This function allows the addition of incrementally linked object files. |
| 2098 | It does not modify any state in the target, only in the debugger. */ |
| 2099 | /* Note: ezannoni 2000-04-13 This function/command used to have a |
| 2100 | special case syntax for the rombug target (Rombug is the boot |
| 2101 | monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the |
| 2102 | rombug case, the user doesn't need to supply a text address, |
| 2103 | instead a call to target_link() (in target.c) would supply the |
| 2104 | value to use. We are now discontinuing this type of ad hoc syntax. */ |
| 2105 | |
| 2106 | static void |
| 2107 | add_symbol_file_command (char *args, int from_tty) |
| 2108 | { |
| 2109 | char *filename = NULL; |
| 2110 | int flags = OBJF_USERLOADED; |
| 2111 | char *arg; |
| 2112 | int expecting_option = 0; |
| 2113 | int section_index = 0; |
| 2114 | int argcnt = 0; |
| 2115 | int sec_num = 0; |
| 2116 | int i; |
| 2117 | int expecting_sec_name = 0; |
| 2118 | int expecting_sec_addr = 0; |
| 2119 | char **argv; |
| 2120 | |
| 2121 | struct sect_opt |
| 2122 | { |
| 2123 | char *name; |
| 2124 | char *value; |
| 2125 | }; |
| 2126 | |
| 2127 | struct section_addr_info *section_addrs; |
| 2128 | struct sect_opt *sect_opts = NULL; |
| 2129 | size_t num_sect_opts = 0; |
| 2130 | struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL); |
| 2131 | |
| 2132 | num_sect_opts = 16; |
| 2133 | sect_opts = (struct sect_opt *) xmalloc (num_sect_opts |
| 2134 | * sizeof (struct sect_opt)); |
| 2135 | |
| 2136 | dont_repeat (); |
| 2137 | |
| 2138 | if (args == NULL) |
| 2139 | error (_("add-symbol-file takes a file name and an address")); |
| 2140 | |
| 2141 | argv = buildargv (args); |
| 2142 | make_cleanup_freeargv (argv); |
| 2143 | |
| 2144 | if (argv == NULL) |
| 2145 | nomem (0); |
| 2146 | |
| 2147 | for (arg = argv[0], argcnt = 0; arg != NULL; arg = argv[++argcnt]) |
| 2148 | { |
| 2149 | /* Process the argument. */ |
| 2150 | if (argcnt == 0) |
| 2151 | { |
| 2152 | /* The first argument is the file name. */ |
| 2153 | filename = tilde_expand (arg); |
| 2154 | make_cleanup (xfree, filename); |
| 2155 | } |
| 2156 | else |
| 2157 | if (argcnt == 1) |
| 2158 | { |
| 2159 | /* The second argument is always the text address at which |
| 2160 | to load the program. */ |
| 2161 | sect_opts[section_index].name = ".text"; |
| 2162 | sect_opts[section_index].value = arg; |
| 2163 | if (++section_index >= num_sect_opts) |
| 2164 | { |
| 2165 | num_sect_opts *= 2; |
| 2166 | sect_opts = ((struct sect_opt *) |
| 2167 | xrealloc (sect_opts, |
| 2168 | num_sect_opts |
| 2169 | * sizeof (struct sect_opt))); |
| 2170 | } |
| 2171 | } |
| 2172 | else |
| 2173 | { |
| 2174 | /* It's an option (starting with '-') or it's an argument |
| 2175 | to an option */ |
| 2176 | |
| 2177 | if (*arg == '-') |
| 2178 | { |
| 2179 | if (strcmp (arg, "-readnow") == 0) |
| 2180 | flags |= OBJF_READNOW; |
| 2181 | else if (strcmp (arg, "-s") == 0) |
| 2182 | { |
| 2183 | expecting_sec_name = 1; |
| 2184 | expecting_sec_addr = 1; |
| 2185 | } |
| 2186 | } |
| 2187 | else |
| 2188 | { |
| 2189 | if (expecting_sec_name) |
| 2190 | { |
| 2191 | sect_opts[section_index].name = arg; |
| 2192 | expecting_sec_name = 0; |
| 2193 | } |
| 2194 | else |
| 2195 | if (expecting_sec_addr) |
| 2196 | { |
| 2197 | sect_opts[section_index].value = arg; |
| 2198 | expecting_sec_addr = 0; |
| 2199 | if (++section_index >= num_sect_opts) |
| 2200 | { |
| 2201 | num_sect_opts *= 2; |
| 2202 | sect_opts = ((struct sect_opt *) |
| 2203 | xrealloc (sect_opts, |
| 2204 | num_sect_opts |
| 2205 | * sizeof (struct sect_opt))); |
| 2206 | } |
| 2207 | } |
| 2208 | else |
| 2209 | error (_("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*")); |
| 2210 | } |
| 2211 | } |
| 2212 | } |
| 2213 | |
| 2214 | /* This command takes at least two arguments. The first one is a |
| 2215 | filename, and the second is the address where this file has been |
| 2216 | loaded. Abort now if this address hasn't been provided by the |
| 2217 | user. */ |
| 2218 | if (section_index < 1) |
| 2219 | error (_("The address where %s has been loaded is missing"), filename); |
| 2220 | |
| 2221 | /* Print the prompt for the query below. And save the arguments into |
| 2222 | a sect_addr_info structure to be passed around to other |
| 2223 | functions. We have to split this up into separate print |
| 2224 | statements because hex_string returns a local static |
| 2225 | string. */ |
| 2226 | |
| 2227 | printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename); |
| 2228 | section_addrs = alloc_section_addr_info (section_index); |
| 2229 | make_cleanup (xfree, section_addrs); |
| 2230 | for (i = 0; i < section_index; i++) |
| 2231 | { |
| 2232 | CORE_ADDR addr; |
| 2233 | char *val = sect_opts[i].value; |
| 2234 | char *sec = sect_opts[i].name; |
| 2235 | |
| 2236 | addr = parse_and_eval_address (val); |
| 2237 | |
| 2238 | /* Here we store the section offsets in the order they were |
| 2239 | entered on the command line. */ |
| 2240 | section_addrs->other[sec_num].name = sec; |
| 2241 | section_addrs->other[sec_num].addr = addr; |
| 2242 | printf_unfiltered ("\t%s_addr = %s\n", sec, paddress (addr)); |
| 2243 | sec_num++; |
| 2244 | |
| 2245 | /* The object's sections are initialized when a |
| 2246 | call is made to build_objfile_section_table (objfile). |
| 2247 | This happens in reread_symbols. |
| 2248 | At this point, we don't know what file type this is, |
| 2249 | so we can't determine what section names are valid. */ |
| 2250 | } |
| 2251 | |
| 2252 | if (from_tty && (!query ("%s", ""))) |
| 2253 | error (_("Not confirmed.")); |
| 2254 | |
| 2255 | symbol_file_add (filename, from_tty, section_addrs, 0, flags); |
| 2256 | |
| 2257 | /* Getting new symbols may change our opinion about what is |
| 2258 | frameless. */ |
| 2259 | reinit_frame_cache (); |
| 2260 | do_cleanups (my_cleanups); |
| 2261 | } |
| 2262 | \f |
| 2263 | static void |
| 2264 | add_shared_symbol_files_command (char *args, int from_tty) |
| 2265 | { |
| 2266 | #ifdef ADD_SHARED_SYMBOL_FILES |
| 2267 | ADD_SHARED_SYMBOL_FILES (args, from_tty); |
| 2268 | #else |
| 2269 | error (_("This command is not available in this configuration of GDB.")); |
| 2270 | #endif |
| 2271 | } |
| 2272 | \f |
| 2273 | /* Re-read symbols if a symbol-file has changed. */ |
| 2274 | void |
| 2275 | reread_symbols (void) |
| 2276 | { |
| 2277 | struct objfile *objfile; |
| 2278 | long new_modtime; |
| 2279 | int reread_one = 0; |
| 2280 | struct stat new_statbuf; |
| 2281 | int res; |
| 2282 | |
| 2283 | /* With the addition of shared libraries, this should be modified, |
| 2284 | the load time should be saved in the partial symbol tables, since |
| 2285 | different tables may come from different source files. FIXME. |
| 2286 | This routine should then walk down each partial symbol table |
| 2287 | and see if the symbol table that it originates from has been changed */ |
| 2288 | |
| 2289 | for (objfile = object_files; objfile; objfile = objfile->next) |
| 2290 | { |
| 2291 | if (objfile->obfd) |
| 2292 | { |
| 2293 | #ifdef DEPRECATED_IBM6000_TARGET |
| 2294 | /* If this object is from a shared library, then you should |
| 2295 | stat on the library name, not member name. */ |
| 2296 | |
| 2297 | if (objfile->obfd->my_archive) |
| 2298 | res = stat (objfile->obfd->my_archive->filename, &new_statbuf); |
| 2299 | else |
| 2300 | #endif |
| 2301 | res = stat (objfile->name, &new_statbuf); |
| 2302 | if (res != 0) |
| 2303 | { |
| 2304 | /* FIXME, should use print_sys_errmsg but it's not filtered. */ |
| 2305 | printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"), |
| 2306 | objfile->name); |
| 2307 | continue; |
| 2308 | } |
| 2309 | new_modtime = new_statbuf.st_mtime; |
| 2310 | if (new_modtime != objfile->mtime) |
| 2311 | { |
| 2312 | struct cleanup *old_cleanups; |
| 2313 | struct section_offsets *offsets; |
| 2314 | int num_offsets; |
| 2315 | char *obfd_filename; |
| 2316 | |
| 2317 | printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"), |
| 2318 | objfile->name); |
| 2319 | |
| 2320 | /* There are various functions like symbol_file_add, |
| 2321 | symfile_bfd_open, syms_from_objfile, etc., which might |
| 2322 | appear to do what we want. But they have various other |
| 2323 | effects which we *don't* want. So we just do stuff |
| 2324 | ourselves. We don't worry about mapped files (for one thing, |
| 2325 | any mapped file will be out of date). */ |
| 2326 | |
| 2327 | /* If we get an error, blow away this objfile (not sure if |
| 2328 | that is the correct response for things like shared |
| 2329 | libraries). */ |
| 2330 | old_cleanups = make_cleanup_free_objfile (objfile); |
| 2331 | /* We need to do this whenever any symbols go away. */ |
| 2332 | make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/); |
| 2333 | |
| 2334 | if (exec_bfd != NULL && strcmp (bfd_get_filename (objfile->obfd), |
| 2335 | bfd_get_filename (exec_bfd)) == 0) |
| 2336 | { |
| 2337 | /* Reload EXEC_BFD without asking anything. */ |
| 2338 | |
| 2339 | exec_file_attach (bfd_get_filename (objfile->obfd), 0); |
| 2340 | } |
| 2341 | |
| 2342 | /* Clean up any state BFD has sitting around. We don't need |
| 2343 | to close the descriptor but BFD lacks a way of closing the |
| 2344 | BFD without closing the descriptor. */ |
| 2345 | obfd_filename = bfd_get_filename (objfile->obfd); |
| 2346 | if (!bfd_close (objfile->obfd)) |
| 2347 | error (_("Can't close BFD for %s: %s"), objfile->name, |
| 2348 | bfd_errmsg (bfd_get_error ())); |
| 2349 | objfile->obfd = bfd_openr (obfd_filename, gnutarget); |
| 2350 | if (objfile->obfd == NULL) |
| 2351 | error (_("Can't open %s to read symbols."), objfile->name); |
| 2352 | /* bfd_openr sets cacheable to true, which is what we want. */ |
| 2353 | if (!bfd_check_format (objfile->obfd, bfd_object)) |
| 2354 | error (_("Can't read symbols from %s: %s."), objfile->name, |
| 2355 | bfd_errmsg (bfd_get_error ())); |
| 2356 | |
| 2357 | /* Save the offsets, we will nuke them with the rest of the |
| 2358 | objfile_obstack. */ |
| 2359 | num_offsets = objfile->num_sections; |
| 2360 | offsets = ((struct section_offsets *) |
| 2361 | alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets))); |
| 2362 | memcpy (offsets, objfile->section_offsets, |
| 2363 | SIZEOF_N_SECTION_OFFSETS (num_offsets)); |
| 2364 | |
| 2365 | /* Remove any references to this objfile in the global |
| 2366 | value lists. */ |
| 2367 | preserve_values (objfile); |
| 2368 | |
| 2369 | /* Nuke all the state that we will re-read. Much of the following |
| 2370 | code which sets things to NULL really is necessary to tell |
| 2371 | other parts of GDB that there is nothing currently there. */ |
| 2372 | |
| 2373 | /* FIXME: Do we have to free a whole linked list, or is this |
| 2374 | enough? */ |
| 2375 | if (objfile->global_psymbols.list) |
| 2376 | xfree (objfile->global_psymbols.list); |
| 2377 | memset (&objfile->global_psymbols, 0, |
| 2378 | sizeof (objfile->global_psymbols)); |
| 2379 | if (objfile->static_psymbols.list) |
| 2380 | xfree (objfile->static_psymbols.list); |
| 2381 | memset (&objfile->static_psymbols, 0, |
| 2382 | sizeof (objfile->static_psymbols)); |
| 2383 | |
| 2384 | /* Free the obstacks for non-reusable objfiles */ |
| 2385 | bcache_xfree (objfile->psymbol_cache); |
| 2386 | objfile->psymbol_cache = bcache_xmalloc (); |
| 2387 | bcache_xfree (objfile->macro_cache); |
| 2388 | objfile->macro_cache = bcache_xmalloc (); |
| 2389 | if (objfile->demangled_names_hash != NULL) |
| 2390 | { |
| 2391 | htab_delete (objfile->demangled_names_hash); |
| 2392 | objfile->demangled_names_hash = NULL; |
| 2393 | } |
| 2394 | obstack_free (&objfile->objfile_obstack, 0); |
| 2395 | objfile->sections = NULL; |
| 2396 | objfile->symtabs = NULL; |
| 2397 | objfile->psymtabs = NULL; |
| 2398 | objfile->free_psymtabs = NULL; |
| 2399 | objfile->cp_namespace_symtab = NULL; |
| 2400 | objfile->msymbols = NULL; |
| 2401 | objfile->deprecated_sym_private = NULL; |
| 2402 | objfile->minimal_symbol_count = 0; |
| 2403 | memset (&objfile->msymbol_hash, 0, |
| 2404 | sizeof (objfile->msymbol_hash)); |
| 2405 | memset (&objfile->msymbol_demangled_hash, 0, |
| 2406 | sizeof (objfile->msymbol_demangled_hash)); |
| 2407 | clear_objfile_data (objfile); |
| 2408 | if (objfile->sf != NULL) |
| 2409 | { |
| 2410 | (*objfile->sf->sym_finish) (objfile); |
| 2411 | } |
| 2412 | |
| 2413 | /* We never make this a mapped file. */ |
| 2414 | objfile->md = NULL; |
| 2415 | objfile->psymbol_cache = bcache_xmalloc (); |
| 2416 | objfile->macro_cache = bcache_xmalloc (); |
| 2417 | /* obstack_init also initializes the obstack so it is |
| 2418 | empty. We could use obstack_specify_allocation but |
| 2419 | gdb_obstack.h specifies the alloc/dealloc |
| 2420 | functions. */ |
| 2421 | obstack_init (&objfile->objfile_obstack); |
| 2422 | if (build_objfile_section_table (objfile)) |
| 2423 | { |
| 2424 | error (_("Can't find the file sections in `%s': %s"), |
| 2425 | objfile->name, bfd_errmsg (bfd_get_error ())); |
| 2426 | } |
| 2427 | terminate_minimal_symbol_table (objfile); |
| 2428 | |
| 2429 | /* We use the same section offsets as from last time. I'm not |
| 2430 | sure whether that is always correct for shared libraries. */ |
| 2431 | objfile->section_offsets = (struct section_offsets *) |
| 2432 | obstack_alloc (&objfile->objfile_obstack, |
| 2433 | SIZEOF_N_SECTION_OFFSETS (num_offsets)); |
| 2434 | memcpy (objfile->section_offsets, offsets, |
| 2435 | SIZEOF_N_SECTION_OFFSETS (num_offsets)); |
| 2436 | objfile->num_sections = num_offsets; |
| 2437 | |
| 2438 | /* What the hell is sym_new_init for, anyway? The concept of |
| 2439 | distinguishing between the main file and additional files |
| 2440 | in this way seems rather dubious. */ |
| 2441 | if (objfile == symfile_objfile) |
| 2442 | { |
| 2443 | (*objfile->sf->sym_new_init) (objfile); |
| 2444 | } |
| 2445 | |
| 2446 | (*objfile->sf->sym_init) (objfile); |
| 2447 | clear_complaints (&symfile_complaints, 1, 1); |
| 2448 | /* The "mainline" parameter is a hideous hack; I think leaving it |
| 2449 | zero is OK since dbxread.c also does what it needs to do if |
| 2450 | objfile->global_psymbols.size is 0. */ |
| 2451 | (*objfile->sf->sym_read) (objfile, 0); |
| 2452 | if (!have_partial_symbols () && !have_full_symbols ()) |
| 2453 | { |
| 2454 | wrap_here (""); |
| 2455 | printf_unfiltered (_("(no debugging symbols found)\n")); |
| 2456 | wrap_here (""); |
| 2457 | } |
| 2458 | objfile->flags |= OBJF_SYMS; |
| 2459 | |
| 2460 | /* We're done reading the symbol file; finish off complaints. */ |
| 2461 | clear_complaints (&symfile_complaints, 0, 1); |
| 2462 | |
| 2463 | /* Getting new symbols may change our opinion about what is |
| 2464 | frameless. */ |
| 2465 | |
| 2466 | reinit_frame_cache (); |
| 2467 | |
| 2468 | /* Discard cleanups as symbol reading was successful. */ |
| 2469 | discard_cleanups (old_cleanups); |
| 2470 | |
| 2471 | /* If the mtime has changed between the time we set new_modtime |
| 2472 | and now, we *want* this to be out of date, so don't call stat |
| 2473 | again now. */ |
| 2474 | objfile->mtime = new_modtime; |
| 2475 | reread_one = 1; |
| 2476 | reread_separate_symbols (objfile); |
| 2477 | init_entry_point_info (objfile); |
| 2478 | } |
| 2479 | } |
| 2480 | } |
| 2481 | |
| 2482 | if (reread_one) |
| 2483 | { |
| 2484 | clear_symtab_users (); |
| 2485 | /* At least one objfile has changed, so we can consider that |
| 2486 | the executable we're debugging has changed too. */ |
| 2487 | observer_notify_executable_changed (NULL); |
| 2488 | } |
| 2489 | |
| 2490 | } |
| 2491 | |
| 2492 | |
| 2493 | /* Handle separate debug info for OBJFILE, which has just been |
| 2494 | re-read: |
| 2495 | - If we had separate debug info before, but now we don't, get rid |
| 2496 | of the separated objfile. |
| 2497 | - If we didn't have separated debug info before, but now we do, |
| 2498 | read in the new separated debug info file. |
| 2499 | - If the debug link points to a different file, toss the old one |
| 2500 | and read the new one. |
| 2501 | This function does *not* handle the case where objfile is still |
| 2502 | using the same separate debug info file, but that file's timestamp |
| 2503 | has changed. That case should be handled by the loop in |
| 2504 | reread_symbols already. */ |
| 2505 | static void |
| 2506 | reread_separate_symbols (struct objfile *objfile) |
| 2507 | { |
| 2508 | char *debug_file; |
| 2509 | unsigned long crc32; |
| 2510 | |
| 2511 | /* Does the updated objfile's debug info live in a |
| 2512 | separate file? */ |
| 2513 | debug_file = find_separate_debug_file (objfile); |
| 2514 | |
| 2515 | if (objfile->separate_debug_objfile) |
| 2516 | { |
| 2517 | /* There are two cases where we need to get rid of |
| 2518 | the old separated debug info objfile: |
| 2519 | - if the new primary objfile doesn't have |
| 2520 | separated debug info, or |
| 2521 | - if the new primary objfile has separate debug |
| 2522 | info, but it's under a different filename. |
| 2523 | |
| 2524 | If the old and new objfiles both have separate |
| 2525 | debug info, under the same filename, then we're |
| 2526 | okay --- if the separated file's contents have |
| 2527 | changed, we will have caught that when we |
| 2528 | visited it in this function's outermost |
| 2529 | loop. */ |
| 2530 | if (! debug_file |
| 2531 | || strcmp (debug_file, objfile->separate_debug_objfile->name) != 0) |
| 2532 | free_objfile (objfile->separate_debug_objfile); |
| 2533 | } |
| 2534 | |
| 2535 | /* If the new objfile has separate debug info, and we |
| 2536 | haven't loaded it already, do so now. */ |
| 2537 | if (debug_file |
| 2538 | && ! objfile->separate_debug_objfile) |
| 2539 | { |
| 2540 | /* Use the same section offset table as objfile itself. |
| 2541 | Preserve the flags from objfile that make sense. */ |
| 2542 | objfile->separate_debug_objfile |
| 2543 | = (symbol_file_add_with_addrs_or_offsets |
| 2544 | (symfile_bfd_open (debug_file), |
| 2545 | info_verbose, /* from_tty: Don't override the default. */ |
| 2546 | 0, /* No addr table. */ |
| 2547 | objfile->section_offsets, objfile->num_sections, |
| 2548 | 0, /* Not mainline. See comments about this above. */ |
| 2549 | objfile->flags & (OBJF_REORDERED | OBJF_SHARED | OBJF_READNOW |
| 2550 | | OBJF_USERLOADED))); |
| 2551 | objfile->separate_debug_objfile->separate_debug_objfile_backlink |
| 2552 | = objfile; |
| 2553 | } |
| 2554 | if (debug_file) |
| 2555 | xfree (debug_file); |
| 2556 | } |
| 2557 | |
| 2558 | |
| 2559 | \f |
| 2560 | |
| 2561 | |
| 2562 | typedef struct |
| 2563 | { |
| 2564 | char *ext; |
| 2565 | enum language lang; |
| 2566 | } |
| 2567 | filename_language; |
| 2568 | |
| 2569 | static filename_language *filename_language_table; |
| 2570 | static int fl_table_size, fl_table_next; |
| 2571 | |
| 2572 | static void |
| 2573 | add_filename_language (char *ext, enum language lang) |
| 2574 | { |
| 2575 | if (fl_table_next >= fl_table_size) |
| 2576 | { |
| 2577 | fl_table_size += 10; |
| 2578 | filename_language_table = |
| 2579 | xrealloc (filename_language_table, |
| 2580 | fl_table_size * sizeof (*filename_language_table)); |
| 2581 | } |
| 2582 | |
| 2583 | filename_language_table[fl_table_next].ext = xstrdup (ext); |
| 2584 | filename_language_table[fl_table_next].lang = lang; |
| 2585 | fl_table_next++; |
| 2586 | } |
| 2587 | |
| 2588 | static char *ext_args; |
| 2589 | static void |
| 2590 | show_ext_args (struct ui_file *file, int from_tty, |
| 2591 | struct cmd_list_element *c, const char *value) |
| 2592 | { |
| 2593 | fprintf_filtered (file, _("\ |
| 2594 | Mapping between filename extension and source language is \"%s\".\n"), |
| 2595 | value); |
| 2596 | } |
| 2597 | |
| 2598 | static void |
| 2599 | set_ext_lang_command (char *args, int from_tty, struct cmd_list_element *e) |
| 2600 | { |
| 2601 | int i; |
| 2602 | char *cp = ext_args; |
| 2603 | enum language lang; |
| 2604 | |
| 2605 | /* First arg is filename extension, starting with '.' */ |
| 2606 | if (*cp != '.') |
| 2607 | error (_("'%s': Filename extension must begin with '.'"), ext_args); |
| 2608 | |
| 2609 | /* Find end of first arg. */ |
| 2610 | while (*cp && !isspace (*cp)) |
| 2611 | cp++; |
| 2612 | |
| 2613 | if (*cp == '\0') |
| 2614 | error (_("'%s': two arguments required -- filename extension and language"), |
| 2615 | ext_args); |
| 2616 | |
| 2617 | /* Null-terminate first arg */ |
| 2618 | *cp++ = '\0'; |
| 2619 | |
| 2620 | /* Find beginning of second arg, which should be a source language. */ |
| 2621 | while (*cp && isspace (*cp)) |
| 2622 | cp++; |
| 2623 | |
| 2624 | if (*cp == '\0') |
| 2625 | error (_("'%s': two arguments required -- filename extension and language"), |
| 2626 | ext_args); |
| 2627 | |
| 2628 | /* Lookup the language from among those we know. */ |
| 2629 | lang = language_enum (cp); |
| 2630 | |
| 2631 | /* Now lookup the filename extension: do we already know it? */ |
| 2632 | for (i = 0; i < fl_table_next; i++) |
| 2633 | if (0 == strcmp (ext_args, filename_language_table[i].ext)) |
| 2634 | break; |
| 2635 | |
| 2636 | if (i >= fl_table_next) |
| 2637 | { |
| 2638 | /* new file extension */ |
| 2639 | add_filename_language (ext_args, lang); |
| 2640 | } |
| 2641 | else |
| 2642 | { |
| 2643 | /* redefining a previously known filename extension */ |
| 2644 | |
| 2645 | /* if (from_tty) */ |
| 2646 | /* query ("Really make files of type %s '%s'?", */ |
| 2647 | /* ext_args, language_str (lang)); */ |
| 2648 | |
| 2649 | xfree (filename_language_table[i].ext); |
| 2650 | filename_language_table[i].ext = xstrdup (ext_args); |
| 2651 | filename_language_table[i].lang = lang; |
| 2652 | } |
| 2653 | } |
| 2654 | |
| 2655 | static void |
| 2656 | info_ext_lang_command (char *args, int from_tty) |
| 2657 | { |
| 2658 | int i; |
| 2659 | |
| 2660 | printf_filtered (_("Filename extensions and the languages they represent:")); |
| 2661 | printf_filtered ("\n\n"); |
| 2662 | for (i = 0; i < fl_table_next; i++) |
| 2663 | printf_filtered ("\t%s\t- %s\n", |
| 2664 | filename_language_table[i].ext, |
| 2665 | language_str (filename_language_table[i].lang)); |
| 2666 | } |
| 2667 | |
| 2668 | static void |
| 2669 | init_filename_language_table (void) |
| 2670 | { |
| 2671 | if (fl_table_size == 0) /* protect against repetition */ |
| 2672 | { |
| 2673 | fl_table_size = 20; |
| 2674 | fl_table_next = 0; |
| 2675 | filename_language_table = |
| 2676 | xmalloc (fl_table_size * sizeof (*filename_language_table)); |
| 2677 | add_filename_language (".c", language_c); |
| 2678 | add_filename_language (".C", language_cplus); |
| 2679 | add_filename_language (".cc", language_cplus); |
| 2680 | add_filename_language (".cp", language_cplus); |
| 2681 | add_filename_language (".cpp", language_cplus); |
| 2682 | add_filename_language (".cxx", language_cplus); |
| 2683 | add_filename_language (".c++", language_cplus); |
| 2684 | add_filename_language (".java", language_java); |
| 2685 | add_filename_language (".class", language_java); |
| 2686 | add_filename_language (".m", language_objc); |
| 2687 | add_filename_language (".f", language_fortran); |
| 2688 | add_filename_language (".F", language_fortran); |
| 2689 | add_filename_language (".s", language_asm); |
| 2690 | add_filename_language (".sx", language_asm); |
| 2691 | add_filename_language (".S", language_asm); |
| 2692 | add_filename_language (".pas", language_pascal); |
| 2693 | add_filename_language (".p", language_pascal); |
| 2694 | add_filename_language (".pp", language_pascal); |
| 2695 | add_filename_language (".adb", language_ada); |
| 2696 | add_filename_language (".ads", language_ada); |
| 2697 | add_filename_language (".a", language_ada); |
| 2698 | add_filename_language (".ada", language_ada); |
| 2699 | } |
| 2700 | } |
| 2701 | |
| 2702 | enum language |
| 2703 | deduce_language_from_filename (char *filename) |
| 2704 | { |
| 2705 | int i; |
| 2706 | char *cp; |
| 2707 | |
| 2708 | if (filename != NULL) |
| 2709 | if ((cp = strrchr (filename, '.')) != NULL) |
| 2710 | for (i = 0; i < fl_table_next; i++) |
| 2711 | if (strcmp (cp, filename_language_table[i].ext) == 0) |
| 2712 | return filename_language_table[i].lang; |
| 2713 | |
| 2714 | return language_unknown; |
| 2715 | } |
| 2716 | \f |
| 2717 | /* allocate_symtab: |
| 2718 | |
| 2719 | Allocate and partly initialize a new symbol table. Return a pointer |
| 2720 | to it. error() if no space. |
| 2721 | |
| 2722 | Caller must set these fields: |
| 2723 | LINETABLE(symtab) |
| 2724 | symtab->blockvector |
| 2725 | symtab->dirname |
| 2726 | symtab->free_code |
| 2727 | symtab->free_ptr |
| 2728 | possibly free_named_symtabs (symtab->filename); |
| 2729 | */ |
| 2730 | |
| 2731 | struct symtab * |
| 2732 | allocate_symtab (char *filename, struct objfile *objfile) |
| 2733 | { |
| 2734 | struct symtab *symtab; |
| 2735 | |
| 2736 | symtab = (struct symtab *) |
| 2737 | obstack_alloc (&objfile->objfile_obstack, sizeof (struct symtab)); |
| 2738 | memset (symtab, 0, sizeof (*symtab)); |
| 2739 | symtab->filename = obsavestring (filename, strlen (filename), |
| 2740 | &objfile->objfile_obstack); |
| 2741 | symtab->fullname = NULL; |
| 2742 | symtab->language = deduce_language_from_filename (filename); |
| 2743 | symtab->debugformat = obsavestring ("unknown", 7, |
| 2744 | &objfile->objfile_obstack); |
| 2745 | |
| 2746 | /* Hook it to the objfile it comes from */ |
| 2747 | |
| 2748 | symtab->objfile = objfile; |
| 2749 | symtab->next = objfile->symtabs; |
| 2750 | objfile->symtabs = symtab; |
| 2751 | |
| 2752 | return (symtab); |
| 2753 | } |
| 2754 | |
| 2755 | struct partial_symtab * |
| 2756 | allocate_psymtab (char *filename, struct objfile *objfile) |
| 2757 | { |
| 2758 | struct partial_symtab *psymtab; |
| 2759 | |
| 2760 | if (objfile->free_psymtabs) |
| 2761 | { |
| 2762 | psymtab = objfile->free_psymtabs; |
| 2763 | objfile->free_psymtabs = psymtab->next; |
| 2764 | } |
| 2765 | else |
| 2766 | psymtab = (struct partial_symtab *) |
| 2767 | obstack_alloc (&objfile->objfile_obstack, |
| 2768 | sizeof (struct partial_symtab)); |
| 2769 | |
| 2770 | memset (psymtab, 0, sizeof (struct partial_symtab)); |
| 2771 | psymtab->filename = obsavestring (filename, strlen (filename), |
| 2772 | &objfile->objfile_obstack); |
| 2773 | psymtab->symtab = NULL; |
| 2774 | |
| 2775 | /* Prepend it to the psymtab list for the objfile it belongs to. |
| 2776 | Psymtabs are searched in most recent inserted -> least recent |
| 2777 | inserted order. */ |
| 2778 | |
| 2779 | psymtab->objfile = objfile; |
| 2780 | psymtab->next = objfile->psymtabs; |
| 2781 | objfile->psymtabs = psymtab; |
| 2782 | #if 0 |
| 2783 | { |
| 2784 | struct partial_symtab **prev_pst; |
| 2785 | psymtab->objfile = objfile; |
| 2786 | psymtab->next = NULL; |
| 2787 | prev_pst = &(objfile->psymtabs); |
| 2788 | while ((*prev_pst) != NULL) |
| 2789 | prev_pst = &((*prev_pst)->next); |
| 2790 | (*prev_pst) = psymtab; |
| 2791 | } |
| 2792 | #endif |
| 2793 | |
| 2794 | return (psymtab); |
| 2795 | } |
| 2796 | |
| 2797 | void |
| 2798 | discard_psymtab (struct partial_symtab *pst) |
| 2799 | { |
| 2800 | struct partial_symtab **prev_pst; |
| 2801 | |
| 2802 | /* From dbxread.c: |
| 2803 | Empty psymtabs happen as a result of header files which don't |
| 2804 | have any symbols in them. There can be a lot of them. But this |
| 2805 | check is wrong, in that a psymtab with N_SLINE entries but |
| 2806 | nothing else is not empty, but we don't realize that. Fixing |
| 2807 | that without slowing things down might be tricky. */ |
| 2808 | |
| 2809 | /* First, snip it out of the psymtab chain */ |
| 2810 | |
| 2811 | prev_pst = &(pst->objfile->psymtabs); |
| 2812 | while ((*prev_pst) != pst) |
| 2813 | prev_pst = &((*prev_pst)->next); |
| 2814 | (*prev_pst) = pst->next; |
| 2815 | |
| 2816 | /* Next, put it on a free list for recycling */ |
| 2817 | |
| 2818 | pst->next = pst->objfile->free_psymtabs; |
| 2819 | pst->objfile->free_psymtabs = pst; |
| 2820 | } |
| 2821 | \f |
| 2822 | |
| 2823 | /* Reset all data structures in gdb which may contain references to symbol |
| 2824 | table data. */ |
| 2825 | |
| 2826 | void |
| 2827 | clear_symtab_users (void) |
| 2828 | { |
| 2829 | /* Someday, we should do better than this, by only blowing away |
| 2830 | the things that really need to be blown. */ |
| 2831 | |
| 2832 | /* Clear the "current" symtab first, because it is no longer valid. |
| 2833 | breakpoint_re_set may try to access the current symtab. */ |
| 2834 | clear_current_source_symtab_and_line (); |
| 2835 | |
| 2836 | clear_displays (); |
| 2837 | breakpoint_re_set (); |
| 2838 | set_default_breakpoint (0, 0, 0, 0); |
| 2839 | clear_pc_function_cache (); |
| 2840 | observer_notify_new_objfile (NULL); |
| 2841 | |
| 2842 | /* Clear globals which might have pointed into a removed objfile. |
| 2843 | FIXME: It's not clear which of these are supposed to persist |
| 2844 | between expressions and which ought to be reset each time. */ |
| 2845 | expression_context_block = NULL; |
| 2846 | innermost_block = NULL; |
| 2847 | |
| 2848 | /* Varobj may refer to old symbols, perform a cleanup. */ |
| 2849 | varobj_invalidate (); |
| 2850 | |
| 2851 | } |
| 2852 | |
| 2853 | static void |
| 2854 | clear_symtab_users_cleanup (void *ignore) |
| 2855 | { |
| 2856 | clear_symtab_users (); |
| 2857 | } |
| 2858 | |
| 2859 | /* clear_symtab_users_once: |
| 2860 | |
| 2861 | This function is run after symbol reading, or from a cleanup. |
| 2862 | If an old symbol table was obsoleted, the old symbol table |
| 2863 | has been blown away, but the other GDB data structures that may |
| 2864 | reference it have not yet been cleared or re-directed. (The old |
| 2865 | symtab was zapped, and the cleanup queued, in free_named_symtab() |
| 2866 | below.) |
| 2867 | |
| 2868 | This function can be queued N times as a cleanup, or called |
| 2869 | directly; it will do all the work the first time, and then will be a |
| 2870 | no-op until the next time it is queued. This works by bumping a |
| 2871 | counter at queueing time. Much later when the cleanup is run, or at |
| 2872 | the end of symbol processing (in case the cleanup is discarded), if |
| 2873 | the queued count is greater than the "done-count", we do the work |
| 2874 | and set the done-count to the queued count. If the queued count is |
| 2875 | less than or equal to the done-count, we just ignore the call. This |
| 2876 | is needed because reading a single .o file will often replace many |
| 2877 | symtabs (one per .h file, for example), and we don't want to reset |
| 2878 | the breakpoints N times in the user's face. |
| 2879 | |
| 2880 | The reason we both queue a cleanup, and call it directly after symbol |
| 2881 | reading, is because the cleanup protects us in case of errors, but is |
| 2882 | discarded if symbol reading is successful. */ |
| 2883 | |
| 2884 | #if 0 |
| 2885 | /* FIXME: As free_named_symtabs is currently a big noop this function |
| 2886 | is no longer needed. */ |
| 2887 | static void clear_symtab_users_once (void); |
| 2888 | |
| 2889 | static int clear_symtab_users_queued; |
| 2890 | static int clear_symtab_users_done; |
| 2891 | |
| 2892 | static void |
| 2893 | clear_symtab_users_once (void) |
| 2894 | { |
| 2895 | /* Enforce once-per-`do_cleanups'-semantics */ |
| 2896 | if (clear_symtab_users_queued <= clear_symtab_users_done) |
| 2897 | return; |
| 2898 | clear_symtab_users_done = clear_symtab_users_queued; |
| 2899 | |
| 2900 | clear_symtab_users (); |
| 2901 | } |
| 2902 | #endif |
| 2903 | |
| 2904 | /* Delete the specified psymtab, and any others that reference it. */ |
| 2905 | |
| 2906 | static void |
| 2907 | cashier_psymtab (struct partial_symtab *pst) |
| 2908 | { |
| 2909 | struct partial_symtab *ps, *pprev = NULL; |
| 2910 | int i; |
| 2911 | |
| 2912 | /* Find its previous psymtab in the chain */ |
| 2913 | for (ps = pst->objfile->psymtabs; ps; ps = ps->next) |
| 2914 | { |
| 2915 | if (ps == pst) |
| 2916 | break; |
| 2917 | pprev = ps; |
| 2918 | } |
| 2919 | |
| 2920 | if (ps) |
| 2921 | { |
| 2922 | /* Unhook it from the chain. */ |
| 2923 | if (ps == pst->objfile->psymtabs) |
| 2924 | pst->objfile->psymtabs = ps->next; |
| 2925 | else |
| 2926 | pprev->next = ps->next; |
| 2927 | |
| 2928 | /* FIXME, we can't conveniently deallocate the entries in the |
| 2929 | partial_symbol lists (global_psymbols/static_psymbols) that |
| 2930 | this psymtab points to. These just take up space until all |
| 2931 | the psymtabs are reclaimed. Ditto the dependencies list and |
| 2932 | filename, which are all in the objfile_obstack. */ |
| 2933 | |
| 2934 | /* We need to cashier any psymtab that has this one as a dependency... */ |
| 2935 | again: |
| 2936 | for (ps = pst->objfile->psymtabs; ps; ps = ps->next) |
| 2937 | { |
| 2938 | for (i = 0; i < ps->number_of_dependencies; i++) |
| 2939 | { |
| 2940 | if (ps->dependencies[i] == pst) |
| 2941 | { |
| 2942 | cashier_psymtab (ps); |
| 2943 | goto again; /* Must restart, chain has been munged. */ |
| 2944 | } |
| 2945 | } |
| 2946 | } |
| 2947 | } |
| 2948 | } |
| 2949 | |
| 2950 | /* If a symtab or psymtab for filename NAME is found, free it along |
| 2951 | with any dependent breakpoints, displays, etc. |
| 2952 | Used when loading new versions of object modules with the "add-file" |
| 2953 | command. This is only called on the top-level symtab or psymtab's name; |
| 2954 | it is not called for subsidiary files such as .h files. |
| 2955 | |
| 2956 | Return value is 1 if we blew away the environment, 0 if not. |
| 2957 | FIXME. The return value appears to never be used. |
| 2958 | |
| 2959 | FIXME. I think this is not the best way to do this. We should |
| 2960 | work on being gentler to the environment while still cleaning up |
| 2961 | all stray pointers into the freed symtab. */ |
| 2962 | |
| 2963 | int |
| 2964 | free_named_symtabs (char *name) |
| 2965 | { |
| 2966 | #if 0 |
| 2967 | /* FIXME: With the new method of each objfile having it's own |
| 2968 | psymtab list, this function needs serious rethinking. In particular, |
| 2969 | why was it ever necessary to toss psymtabs with specific compilation |
| 2970 | unit filenames, as opposed to all psymtabs from a particular symbol |
| 2971 | file? -- fnf |
| 2972 | Well, the answer is that some systems permit reloading of particular |
| 2973 | compilation units. We want to blow away any old info about these |
| 2974 | compilation units, regardless of which objfiles they arrived in. --gnu. */ |
| 2975 | |
| 2976 | struct symtab *s; |
| 2977 | struct symtab *prev; |
| 2978 | struct partial_symtab *ps; |
| 2979 | struct blockvector *bv; |
| 2980 | int blewit = 0; |
| 2981 | |
| 2982 | /* We only wack things if the symbol-reload switch is set. */ |
| 2983 | if (!symbol_reloading) |
| 2984 | return 0; |
| 2985 | |
| 2986 | /* Some symbol formats have trouble providing file names... */ |
| 2987 | if (name == 0 || *name == '\0') |
| 2988 | return 0; |
| 2989 | |
| 2990 | /* Look for a psymtab with the specified name. */ |
| 2991 | |
| 2992 | again2: |
| 2993 | for (ps = partial_symtab_list; ps; ps = ps->next) |
| 2994 | { |
| 2995 | if (strcmp (name, ps->filename) == 0) |
| 2996 | { |
| 2997 | cashier_psymtab (ps); /* Blow it away...and its little dog, too. */ |
| 2998 | goto again2; /* Must restart, chain has been munged */ |
| 2999 | } |
| 3000 | } |
| 3001 | |
| 3002 | /* Look for a symtab with the specified name. */ |
| 3003 | |
| 3004 | for (s = symtab_list; s; s = s->next) |
| 3005 | { |
| 3006 | if (strcmp (name, s->filename) == 0) |
| 3007 | break; |
| 3008 | prev = s; |
| 3009 | } |
| 3010 | |
| 3011 | if (s) |
| 3012 | { |
| 3013 | if (s == symtab_list) |
| 3014 | symtab_list = s->next; |
| 3015 | else |
| 3016 | prev->next = s->next; |
| 3017 | |
| 3018 | /* For now, queue a delete for all breakpoints, displays, etc., whether |
| 3019 | or not they depend on the symtab being freed. This should be |
| 3020 | changed so that only those data structures affected are deleted. */ |
| 3021 | |
| 3022 | /* But don't delete anything if the symtab is empty. |
| 3023 | This test is necessary due to a bug in "dbxread.c" that |
| 3024 | causes empty symtabs to be created for N_SO symbols that |
| 3025 | contain the pathname of the object file. (This problem |
| 3026 | has been fixed in GDB 3.9x). */ |
| 3027 | |
| 3028 | bv = BLOCKVECTOR (s); |
| 3029 | if (BLOCKVECTOR_NBLOCKS (bv) > 2 |
| 3030 | || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) |
| 3031 | || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK))) |
| 3032 | { |
| 3033 | complaint (&symfile_complaints, _("Replacing old symbols for `%s'"), |
| 3034 | name); |
| 3035 | clear_symtab_users_queued++; |
| 3036 | make_cleanup (clear_symtab_users_once, 0); |
| 3037 | blewit = 1; |
| 3038 | } |
| 3039 | else |
| 3040 | complaint (&symfile_complaints, _("Empty symbol table found for `%s'"), |
| 3041 | name); |
| 3042 | |
| 3043 | free_symtab (s); |
| 3044 | } |
| 3045 | else |
| 3046 | { |
| 3047 | /* It is still possible that some breakpoints will be affected |
| 3048 | even though no symtab was found, since the file might have |
| 3049 | been compiled without debugging, and hence not be associated |
| 3050 | with a symtab. In order to handle this correctly, we would need |
| 3051 | to keep a list of text address ranges for undebuggable files. |
| 3052 | For now, we do nothing, since this is a fairly obscure case. */ |
| 3053 | ; |
| 3054 | } |
| 3055 | |
| 3056 | /* FIXME, what about the minimal symbol table? */ |
| 3057 | return blewit; |
| 3058 | #else |
| 3059 | return (0); |
| 3060 | #endif |
| 3061 | } |
| 3062 | \f |
| 3063 | /* Allocate and partially fill a partial symtab. It will be |
| 3064 | completely filled at the end of the symbol list. |
| 3065 | |
| 3066 | FILENAME is the name of the symbol-file we are reading from. */ |
| 3067 | |
| 3068 | struct partial_symtab * |
| 3069 | start_psymtab_common (struct objfile *objfile, |
| 3070 | struct section_offsets *section_offsets, char *filename, |
| 3071 | CORE_ADDR textlow, struct partial_symbol **global_syms, |
| 3072 | struct partial_symbol **static_syms) |
| 3073 | { |
| 3074 | struct partial_symtab *psymtab; |
| 3075 | |
| 3076 | psymtab = allocate_psymtab (filename, objfile); |
| 3077 | psymtab->section_offsets = section_offsets; |
| 3078 | psymtab->textlow = textlow; |
| 3079 | psymtab->texthigh = psymtab->textlow; /* default */ |
| 3080 | psymtab->globals_offset = global_syms - objfile->global_psymbols.list; |
| 3081 | psymtab->statics_offset = static_syms - objfile->static_psymbols.list; |
| 3082 | return (psymtab); |
| 3083 | } |
| 3084 | \f |
| 3085 | /* Add a symbol with a long value to a psymtab. |
| 3086 | Since one arg is a struct, we pass in a ptr and deref it (sigh). |
| 3087 | Return the partial symbol that has been added. */ |
| 3088 | |
| 3089 | /* NOTE: carlton/2003-09-11: The reason why we return the partial |
| 3090 | symbol is so that callers can get access to the symbol's demangled |
| 3091 | name, which they don't have any cheap way to determine otherwise. |
| 3092 | (Currenly, dwarf2read.c is the only file who uses that information, |
| 3093 | though it's possible that other readers might in the future.) |
| 3094 | Elena wasn't thrilled about that, and I don't blame her, but we |
| 3095 | couldn't come up with a better way to get that information. If |
| 3096 | it's needed in other situations, we could consider breaking up |
| 3097 | SYMBOL_SET_NAMES to provide access to the demangled name lookup |
| 3098 | cache. */ |
| 3099 | |
| 3100 | const struct partial_symbol * |
| 3101 | add_psymbol_to_list (char *name, int namelength, domain_enum domain, |
| 3102 | enum address_class class, |
| 3103 | struct psymbol_allocation_list *list, long val, /* Value as a long */ |
| 3104 | CORE_ADDR coreaddr, /* Value as a CORE_ADDR */ |
| 3105 | enum language language, struct objfile *objfile) |
| 3106 | { |
| 3107 | struct partial_symbol *psym; |
| 3108 | char *buf = alloca (namelength + 1); |
| 3109 | /* psymbol is static so that there will be no uninitialized gaps in the |
| 3110 | structure which might contain random data, causing cache misses in |
| 3111 | bcache. */ |
| 3112 | static struct partial_symbol psymbol; |
| 3113 | |
| 3114 | /* Create local copy of the partial symbol */ |
| 3115 | memcpy (buf, name, namelength); |
| 3116 | buf[namelength] = '\0'; |
| 3117 | /* val and coreaddr are mutually exclusive, one of them *will* be zero */ |
| 3118 | if (val != 0) |
| 3119 | { |
| 3120 | SYMBOL_VALUE (&psymbol) = val; |
| 3121 | } |
| 3122 | else |
| 3123 | { |
| 3124 | SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr; |
| 3125 | } |
| 3126 | SYMBOL_SECTION (&psymbol) = 0; |
| 3127 | SYMBOL_LANGUAGE (&psymbol) = language; |
| 3128 | PSYMBOL_DOMAIN (&psymbol) = domain; |
| 3129 | PSYMBOL_CLASS (&psymbol) = class; |
| 3130 | |
| 3131 | SYMBOL_SET_NAMES (&psymbol, buf, namelength, objfile); |
| 3132 | |
| 3133 | /* Stash the partial symbol away in the cache */ |
| 3134 | psym = deprecated_bcache (&psymbol, sizeof (struct partial_symbol), |
| 3135 | objfile->psymbol_cache); |
| 3136 | |
| 3137 | /* Save pointer to partial symbol in psymtab, growing symtab if needed. */ |
| 3138 | if (list->next >= list->list + list->size) |
| 3139 | { |
| 3140 | extend_psymbol_list (list, objfile); |
| 3141 | } |
| 3142 | *list->next++ = psym; |
| 3143 | OBJSTAT (objfile, n_psyms++); |
| 3144 | |
| 3145 | return psym; |
| 3146 | } |
| 3147 | |
| 3148 | /* Initialize storage for partial symbols. */ |
| 3149 | |
| 3150 | void |
| 3151 | init_psymbol_list (struct objfile *objfile, int total_symbols) |
| 3152 | { |
| 3153 | /* Free any previously allocated psymbol lists. */ |
| 3154 | |
| 3155 | if (objfile->global_psymbols.list) |
| 3156 | { |
| 3157 | xfree (objfile->global_psymbols.list); |
| 3158 | } |
| 3159 | if (objfile->static_psymbols.list) |
| 3160 | { |
| 3161 | xfree (objfile->static_psymbols.list); |
| 3162 | } |
| 3163 | |
| 3164 | /* Current best guess is that approximately a twentieth |
| 3165 | of the total symbols (in a debugging file) are global or static |
| 3166 | oriented symbols */ |
| 3167 | |
| 3168 | objfile->global_psymbols.size = total_symbols / 10; |
| 3169 | objfile->static_psymbols.size = total_symbols / 10; |
| 3170 | |
| 3171 | if (objfile->global_psymbols.size > 0) |
| 3172 | { |
| 3173 | objfile->global_psymbols.next = |
| 3174 | objfile->global_psymbols.list = (struct partial_symbol **) |
| 3175 | xmalloc ((objfile->global_psymbols.size |
| 3176 | * sizeof (struct partial_symbol *))); |
| 3177 | } |
| 3178 | if (objfile->static_psymbols.size > 0) |
| 3179 | { |
| 3180 | objfile->static_psymbols.next = |
| 3181 | objfile->static_psymbols.list = (struct partial_symbol **) |
| 3182 | xmalloc ((objfile->static_psymbols.size |
| 3183 | * sizeof (struct partial_symbol *))); |
| 3184 | } |
| 3185 | } |
| 3186 | |
| 3187 | /* OVERLAYS: |
| 3188 | The following code implements an abstraction for debugging overlay sections. |
| 3189 | |
| 3190 | The target model is as follows: |
| 3191 | 1) The gnu linker will permit multiple sections to be mapped into the |
| 3192 | same VMA, each with its own unique LMA (or load address). |
| 3193 | 2) It is assumed that some runtime mechanism exists for mapping the |
| 3194 | sections, one by one, from the load address into the VMA address. |
| 3195 | 3) This code provides a mechanism for gdb to keep track of which |
| 3196 | sections should be considered to be mapped from the VMA to the LMA. |
| 3197 | This information is used for symbol lookup, and memory read/write. |
| 3198 | For instance, if a section has been mapped then its contents |
| 3199 | should be read from the VMA, otherwise from the LMA. |
| 3200 | |
| 3201 | Two levels of debugger support for overlays are available. One is |
| 3202 | "manual", in which the debugger relies on the user to tell it which |
| 3203 | overlays are currently mapped. This level of support is |
| 3204 | implemented entirely in the core debugger, and the information about |
| 3205 | whether a section is mapped is kept in the objfile->obj_section table. |
| 3206 | |
| 3207 | The second level of support is "automatic", and is only available if |
| 3208 | the target-specific code provides functionality to read the target's |
| 3209 | overlay mapping table, and translate its contents for the debugger |
| 3210 | (by updating the mapped state information in the obj_section tables). |
| 3211 | |
| 3212 | The interface is as follows: |
| 3213 | User commands: |
| 3214 | overlay map <name> -- tell gdb to consider this section mapped |
| 3215 | overlay unmap <name> -- tell gdb to consider this section unmapped |
| 3216 | overlay list -- list the sections that GDB thinks are mapped |
| 3217 | overlay read-target -- get the target's state of what's mapped |
| 3218 | overlay off/manual/auto -- set overlay debugging state |
| 3219 | Functional interface: |
| 3220 | find_pc_mapped_section(pc): if the pc is in the range of a mapped |
| 3221 | section, return that section. |
| 3222 | find_pc_overlay(pc): find any overlay section that contains |
| 3223 | the pc, either in its VMA or its LMA |
| 3224 | overlay_is_mapped(sect): true if overlay is marked as mapped |
| 3225 | section_is_overlay(sect): true if section's VMA != LMA |
| 3226 | pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA |
| 3227 | pc_in_unmapped_range(...): true if pc belongs to section's LMA |
| 3228 | sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap |
| 3229 | overlay_mapped_address(...): map an address from section's LMA to VMA |
| 3230 | overlay_unmapped_address(...): map an address from section's VMA to LMA |
| 3231 | symbol_overlayed_address(...): Return a "current" address for symbol: |
| 3232 | either in VMA or LMA depending on whether |
| 3233 | the symbol's section is currently mapped |
| 3234 | */ |
| 3235 | |
| 3236 | /* Overlay debugging state: */ |
| 3237 | |
| 3238 | enum overlay_debugging_state overlay_debugging = ovly_off; |
| 3239 | int overlay_cache_invalid = 0; /* True if need to refresh mapped state */ |
| 3240 | |
| 3241 | /* Function: section_is_overlay (SECTION) |
| 3242 | Returns true if SECTION has VMA not equal to LMA, ie. |
| 3243 | SECTION is loaded at an address different from where it will "run". */ |
| 3244 | |
| 3245 | int |
| 3246 | section_is_overlay (asection *section) |
| 3247 | { |
| 3248 | /* FIXME: need bfd *, so we can use bfd_section_lma methods. */ |
| 3249 | |
| 3250 | if (overlay_debugging) |
| 3251 | if (section && section->lma != 0 && |
| 3252 | section->vma != section->lma) |
| 3253 | return 1; |
| 3254 | |
| 3255 | return 0; |
| 3256 | } |
| 3257 | |
| 3258 | /* Function: overlay_invalidate_all (void) |
| 3259 | Invalidate the mapped state of all overlay sections (mark it as stale). */ |
| 3260 | |
| 3261 | static void |
| 3262 | overlay_invalidate_all (void) |
| 3263 | { |
| 3264 | struct objfile *objfile; |
| 3265 | struct obj_section *sect; |
| 3266 | |
| 3267 | ALL_OBJSECTIONS (objfile, sect) |
| 3268 | if (section_is_overlay (sect->the_bfd_section)) |
| 3269 | sect->ovly_mapped = -1; |
| 3270 | } |
| 3271 | |
| 3272 | /* Function: overlay_is_mapped (SECTION) |
| 3273 | Returns true if section is an overlay, and is currently mapped. |
| 3274 | Private: public access is thru function section_is_mapped. |
| 3275 | |
| 3276 | Access to the ovly_mapped flag is restricted to this function, so |
| 3277 | that we can do automatic update. If the global flag |
| 3278 | OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call |
| 3279 | overlay_invalidate_all. If the mapped state of the particular |
| 3280 | section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */ |
| 3281 | |
| 3282 | static int |
| 3283 | overlay_is_mapped (struct obj_section *osect) |
| 3284 | { |
| 3285 | if (osect == 0 || !section_is_overlay (osect->the_bfd_section)) |
| 3286 | return 0; |
| 3287 | |
| 3288 | switch (overlay_debugging) |
| 3289 | { |
| 3290 | default: |
| 3291 | case ovly_off: |
| 3292 | return 0; /* overlay debugging off */ |
| 3293 | case ovly_auto: /* overlay debugging automatic */ |
| 3294 | /* Unles there is a gdbarch_overlay_update function, |
| 3295 | there's really nothing useful to do here (can't really go auto) */ |
| 3296 | if (gdbarch_overlay_update_p (current_gdbarch)) |
| 3297 | { |
| 3298 | if (overlay_cache_invalid) |
| 3299 | { |
| 3300 | overlay_invalidate_all (); |
| 3301 | overlay_cache_invalid = 0; |
| 3302 | } |
| 3303 | if (osect->ovly_mapped == -1) |
| 3304 | gdbarch_overlay_update (current_gdbarch, osect); |
| 3305 | } |
| 3306 | /* fall thru to manual case */ |
| 3307 | case ovly_on: /* overlay debugging manual */ |
| 3308 | return osect->ovly_mapped == 1; |
| 3309 | } |
| 3310 | } |
| 3311 | |
| 3312 | /* Function: section_is_mapped |
| 3313 | Returns true if section is an overlay, and is currently mapped. */ |
| 3314 | |
| 3315 | int |
| 3316 | section_is_mapped (asection *section) |
| 3317 | { |
| 3318 | struct objfile *objfile; |
| 3319 | struct obj_section *osect; |
| 3320 | |
| 3321 | if (overlay_debugging) |
| 3322 | if (section && section_is_overlay (section)) |
| 3323 | ALL_OBJSECTIONS (objfile, osect) |
| 3324 | if (osect->the_bfd_section == section) |
| 3325 | return overlay_is_mapped (osect); |
| 3326 | |
| 3327 | return 0; |
| 3328 | } |
| 3329 | |
| 3330 | /* Function: pc_in_unmapped_range |
| 3331 | If PC falls into the lma range of SECTION, return true, else false. */ |
| 3332 | |
| 3333 | CORE_ADDR |
| 3334 | pc_in_unmapped_range (CORE_ADDR pc, asection *section) |
| 3335 | { |
| 3336 | /* FIXME: need bfd *, so we can use bfd_section_lma methods. */ |
| 3337 | |
| 3338 | int size; |
| 3339 | |
| 3340 | if (overlay_debugging) |
| 3341 | if (section && section_is_overlay (section)) |
| 3342 | { |
| 3343 | size = bfd_get_section_size (section); |
| 3344 | if (section->lma <= pc && pc < section->lma + size) |
| 3345 | return 1; |
| 3346 | } |
| 3347 | return 0; |
| 3348 | } |
| 3349 | |
| 3350 | /* Function: pc_in_mapped_range |
| 3351 | If PC falls into the vma range of SECTION, return true, else false. */ |
| 3352 | |
| 3353 | CORE_ADDR |
| 3354 | pc_in_mapped_range (CORE_ADDR pc, asection *section) |
| 3355 | { |
| 3356 | /* FIXME: need bfd *, so we can use bfd_section_vma methods. */ |
| 3357 | |
| 3358 | int size; |
| 3359 | |
| 3360 | if (overlay_debugging) |
| 3361 | if (section && section_is_overlay (section)) |
| 3362 | { |
| 3363 | size = bfd_get_section_size (section); |
| 3364 | if (section->vma <= pc && pc < section->vma + size) |
| 3365 | return 1; |
| 3366 | } |
| 3367 | return 0; |
| 3368 | } |
| 3369 | |
| 3370 | |
| 3371 | /* Return true if the mapped ranges of sections A and B overlap, false |
| 3372 | otherwise. */ |
| 3373 | static int |
| 3374 | sections_overlap (asection *a, asection *b) |
| 3375 | { |
| 3376 | /* FIXME: need bfd *, so we can use bfd_section_vma methods. */ |
| 3377 | |
| 3378 | CORE_ADDR a_start = a->vma; |
| 3379 | CORE_ADDR a_end = a->vma + bfd_get_section_size (a); |
| 3380 | CORE_ADDR b_start = b->vma; |
| 3381 | CORE_ADDR b_end = b->vma + bfd_get_section_size (b); |
| 3382 | |
| 3383 | return (a_start < b_end && b_start < a_end); |
| 3384 | } |
| 3385 | |
| 3386 | /* Function: overlay_unmapped_address (PC, SECTION) |
| 3387 | Returns the address corresponding to PC in the unmapped (load) range. |
| 3388 | May be the same as PC. */ |
| 3389 | |
| 3390 | CORE_ADDR |
| 3391 | overlay_unmapped_address (CORE_ADDR pc, asection *section) |
| 3392 | { |
| 3393 | /* FIXME: need bfd *, so we can use bfd_section_lma methods. */ |
| 3394 | |
| 3395 | if (overlay_debugging) |
| 3396 | if (section && section_is_overlay (section) && |
| 3397 | pc_in_mapped_range (pc, section)) |
| 3398 | return pc + section->lma - section->vma; |
| 3399 | |
| 3400 | return pc; |
| 3401 | } |
| 3402 | |
| 3403 | /* Function: overlay_mapped_address (PC, SECTION) |
| 3404 | Returns the address corresponding to PC in the mapped (runtime) range. |
| 3405 | May be the same as PC. */ |
| 3406 | |
| 3407 | CORE_ADDR |
| 3408 | overlay_mapped_address (CORE_ADDR pc, asection *section) |
| 3409 | { |
| 3410 | /* FIXME: need bfd *, so we can use bfd_section_vma methods. */ |
| 3411 | |
| 3412 | if (overlay_debugging) |
| 3413 | if (section && section_is_overlay (section) && |
| 3414 | pc_in_unmapped_range (pc, section)) |
| 3415 | return pc + section->vma - section->lma; |
| 3416 | |
| 3417 | return pc; |
| 3418 | } |
| 3419 | |
| 3420 | |
| 3421 | /* Function: symbol_overlayed_address |
| 3422 | Return one of two addresses (relative to the VMA or to the LMA), |
| 3423 | depending on whether the section is mapped or not. */ |
| 3424 | |
| 3425 | CORE_ADDR |
| 3426 | symbol_overlayed_address (CORE_ADDR address, asection *section) |
| 3427 | { |
| 3428 | if (overlay_debugging) |
| 3429 | { |
| 3430 | /* If the symbol has no section, just return its regular address. */ |
| 3431 | if (section == 0) |
| 3432 | return address; |
| 3433 | /* If the symbol's section is not an overlay, just return its address */ |
| 3434 | if (!section_is_overlay (section)) |
| 3435 | return address; |
| 3436 | /* If the symbol's section is mapped, just return its address */ |
| 3437 | if (section_is_mapped (section)) |
| 3438 | return address; |
| 3439 | /* |
| 3440 | * HOWEVER: if the symbol is in an overlay section which is NOT mapped, |
| 3441 | * then return its LOADED address rather than its vma address!! |
| 3442 | */ |
| 3443 | return overlay_unmapped_address (address, section); |
| 3444 | } |
| 3445 | return address; |
| 3446 | } |
| 3447 | |
| 3448 | /* Function: find_pc_overlay (PC) |
| 3449 | Return the best-match overlay section for PC: |
| 3450 | If PC matches a mapped overlay section's VMA, return that section. |
| 3451 | Else if PC matches an unmapped section's VMA, return that section. |
| 3452 | Else if PC matches an unmapped section's LMA, return that section. */ |
| 3453 | |
| 3454 | asection * |
| 3455 | find_pc_overlay (CORE_ADDR pc) |
| 3456 | { |
| 3457 | struct objfile *objfile; |
| 3458 | struct obj_section *osect, *best_match = NULL; |
| 3459 | |
| 3460 | if (overlay_debugging) |
| 3461 | ALL_OBJSECTIONS (objfile, osect) |
| 3462 | if (section_is_overlay (osect->the_bfd_section)) |
| 3463 | { |
| 3464 | if (pc_in_mapped_range (pc, osect->the_bfd_section)) |
| 3465 | { |
| 3466 | if (overlay_is_mapped (osect)) |
| 3467 | return osect->the_bfd_section; |
| 3468 | else |
| 3469 | best_match = osect; |
| 3470 | } |
| 3471 | else if (pc_in_unmapped_range (pc, osect->the_bfd_section)) |
| 3472 | best_match = osect; |
| 3473 | } |
| 3474 | return best_match ? best_match->the_bfd_section : NULL; |
| 3475 | } |
| 3476 | |
| 3477 | /* Function: find_pc_mapped_section (PC) |
| 3478 | If PC falls into the VMA address range of an overlay section that is |
| 3479 | currently marked as MAPPED, return that section. Else return NULL. */ |
| 3480 | |
| 3481 | asection * |
| 3482 | find_pc_mapped_section (CORE_ADDR pc) |
| 3483 | { |
| 3484 | struct objfile *objfile; |
| 3485 | struct obj_section *osect; |
| 3486 | |
| 3487 | if (overlay_debugging) |
| 3488 | ALL_OBJSECTIONS (objfile, osect) |
| 3489 | if (pc_in_mapped_range (pc, osect->the_bfd_section) && |
| 3490 | overlay_is_mapped (osect)) |
| 3491 | return osect->the_bfd_section; |
| 3492 | |
| 3493 | return NULL; |
| 3494 | } |
| 3495 | |
| 3496 | /* Function: list_overlays_command |
| 3497 | Print a list of mapped sections and their PC ranges */ |
| 3498 | |
| 3499 | void |
| 3500 | list_overlays_command (char *args, int from_tty) |
| 3501 | { |
| 3502 | int nmapped = 0; |
| 3503 | struct objfile *objfile; |
| 3504 | struct obj_section *osect; |
| 3505 | |
| 3506 | if (overlay_debugging) |
| 3507 | ALL_OBJSECTIONS (objfile, osect) |
| 3508 | if (overlay_is_mapped (osect)) |
| 3509 | { |
| 3510 | const char *name; |
| 3511 | bfd_vma lma, vma; |
| 3512 | int size; |
| 3513 | |
| 3514 | vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section); |
| 3515 | lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section); |
| 3516 | size = bfd_get_section_size (osect->the_bfd_section); |
| 3517 | name = bfd_section_name (objfile->obfd, osect->the_bfd_section); |
| 3518 | |
| 3519 | printf_filtered ("Section %s, loaded at ", name); |
| 3520 | fputs_filtered (paddress (lma), gdb_stdout); |
| 3521 | puts_filtered (" - "); |
| 3522 | fputs_filtered (paddress (lma + size), gdb_stdout); |
| 3523 | printf_filtered (", mapped at "); |
| 3524 | fputs_filtered (paddress (vma), gdb_stdout); |
| 3525 | puts_filtered (" - "); |
| 3526 | fputs_filtered (paddress (vma + size), gdb_stdout); |
| 3527 | puts_filtered ("\n"); |
| 3528 | |
| 3529 | nmapped++; |
| 3530 | } |
| 3531 | if (nmapped == 0) |
| 3532 | printf_filtered (_("No sections are mapped.\n")); |
| 3533 | } |
| 3534 | |
| 3535 | /* Function: map_overlay_command |
| 3536 | Mark the named section as mapped (ie. residing at its VMA address). */ |
| 3537 | |
| 3538 | void |
| 3539 | map_overlay_command (char *args, int from_tty) |
| 3540 | { |
| 3541 | struct objfile *objfile, *objfile2; |
| 3542 | struct obj_section *sec, *sec2; |
| 3543 | asection *bfdsec; |
| 3544 | |
| 3545 | if (!overlay_debugging) |
| 3546 | error (_("\ |
| 3547 | Overlay debugging not enabled. Use either the 'overlay auto' or\n\ |
| 3548 | the 'overlay manual' command.")); |
| 3549 | |
| 3550 | if (args == 0 || *args == 0) |
| 3551 | error (_("Argument required: name of an overlay section")); |
| 3552 | |
| 3553 | /* First, find a section matching the user supplied argument */ |
| 3554 | ALL_OBJSECTIONS (objfile, sec) |
| 3555 | if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) |
| 3556 | { |
| 3557 | /* Now, check to see if the section is an overlay. */ |
| 3558 | bfdsec = sec->the_bfd_section; |
| 3559 | if (!section_is_overlay (bfdsec)) |
| 3560 | continue; /* not an overlay section */ |
| 3561 | |
| 3562 | /* Mark the overlay as "mapped" */ |
| 3563 | sec->ovly_mapped = 1; |
| 3564 | |
| 3565 | /* Next, make a pass and unmap any sections that are |
| 3566 | overlapped by this new section: */ |
| 3567 | ALL_OBJSECTIONS (objfile2, sec2) |
| 3568 | if (sec2->ovly_mapped |
| 3569 | && sec != sec2 |
| 3570 | && sec->the_bfd_section != sec2->the_bfd_section |
| 3571 | && sections_overlap (sec->the_bfd_section, |
| 3572 | sec2->the_bfd_section)) |
| 3573 | { |
| 3574 | if (info_verbose) |
| 3575 | printf_unfiltered (_("Note: section %s unmapped by overlap\n"), |
| 3576 | bfd_section_name (objfile->obfd, |
| 3577 | sec2->the_bfd_section)); |
| 3578 | sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */ |
| 3579 | } |
| 3580 | return; |
| 3581 | } |
| 3582 | error (_("No overlay section called %s"), args); |
| 3583 | } |
| 3584 | |
| 3585 | /* Function: unmap_overlay_command |
| 3586 | Mark the overlay section as unmapped |
| 3587 | (ie. resident in its LMA address range, rather than the VMA range). */ |
| 3588 | |
| 3589 | void |
| 3590 | unmap_overlay_command (char *args, int from_tty) |
| 3591 | { |
| 3592 | struct objfile *objfile; |
| 3593 | struct obj_section *sec; |
| 3594 | |
| 3595 | if (!overlay_debugging) |
| 3596 | error (_("\ |
| 3597 | Overlay debugging not enabled. Use either the 'overlay auto' or\n\ |
| 3598 | the 'overlay manual' command.")); |
| 3599 | |
| 3600 | if (args == 0 || *args == 0) |
| 3601 | error (_("Argument required: name of an overlay section")); |
| 3602 | |
| 3603 | /* First, find a section matching the user supplied argument */ |
| 3604 | ALL_OBJSECTIONS (objfile, sec) |
| 3605 | if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) |
| 3606 | { |
| 3607 | if (!sec->ovly_mapped) |
| 3608 | error (_("Section %s is not mapped"), args); |
| 3609 | sec->ovly_mapped = 0; |
| 3610 | return; |
| 3611 | } |
| 3612 | error (_("No overlay section called %s"), args); |
| 3613 | } |
| 3614 | |
| 3615 | /* Function: overlay_auto_command |
| 3616 | A utility command to turn on overlay debugging. |
| 3617 | Possibly this should be done via a set/show command. */ |
| 3618 | |
| 3619 | static void |
| 3620 | overlay_auto_command (char *args, int from_tty) |
| 3621 | { |
| 3622 | overlay_debugging = ovly_auto; |
| 3623 | enable_overlay_breakpoints (); |
| 3624 | if (info_verbose) |
| 3625 | printf_unfiltered (_("Automatic overlay debugging enabled.")); |
| 3626 | } |
| 3627 | |
| 3628 | /* Function: overlay_manual_command |
| 3629 | A utility command to turn on overlay debugging. |
| 3630 | Possibly this should be done via a set/show command. */ |
| 3631 | |
| 3632 | static void |
| 3633 | overlay_manual_command (char *args, int from_tty) |
| 3634 | { |
| 3635 | overlay_debugging = ovly_on; |
| 3636 | disable_overlay_breakpoints (); |
| 3637 | if (info_verbose) |
| 3638 | printf_unfiltered (_("Overlay debugging enabled.")); |
| 3639 | } |
| 3640 | |
| 3641 | /* Function: overlay_off_command |
| 3642 | A utility command to turn on overlay debugging. |
| 3643 | Possibly this should be done via a set/show command. */ |
| 3644 | |
| 3645 | static void |
| 3646 | overlay_off_command (char *args, int from_tty) |
| 3647 | { |
| 3648 | overlay_debugging = ovly_off; |
| 3649 | disable_overlay_breakpoints (); |
| 3650 | if (info_verbose) |
| 3651 | printf_unfiltered (_("Overlay debugging disabled.")); |
| 3652 | } |
| 3653 | |
| 3654 | static void |
| 3655 | overlay_load_command (char *args, int from_tty) |
| 3656 | { |
| 3657 | if (gdbarch_overlay_update_p (current_gdbarch)) |
| 3658 | gdbarch_overlay_update (current_gdbarch, NULL); |
| 3659 | else |
| 3660 | error (_("This target does not know how to read its overlay state.")); |
| 3661 | } |
| 3662 | |
| 3663 | /* Function: overlay_command |
| 3664 | A place-holder for a mis-typed command */ |
| 3665 | |
| 3666 | /* Command list chain containing all defined "overlay" subcommands. */ |
| 3667 | struct cmd_list_element *overlaylist; |
| 3668 | |
| 3669 | static void |
| 3670 | overlay_command (char *args, int from_tty) |
| 3671 | { |
| 3672 | printf_unfiltered |
| 3673 | ("\"overlay\" must be followed by the name of an overlay command.\n"); |
| 3674 | help_list (overlaylist, "overlay ", -1, gdb_stdout); |
| 3675 | } |
| 3676 | |
| 3677 | |
| 3678 | /* Target Overlays for the "Simplest" overlay manager: |
| 3679 | |
| 3680 | This is GDB's default target overlay layer. It works with the |
| 3681 | minimal overlay manager supplied as an example by Cygnus. The |
| 3682 | entry point is via a function pointer "gdbarch_overlay_update", |
| 3683 | so targets that use a different runtime overlay manager can |
| 3684 | substitute their own overlay_update function and take over the |
| 3685 | function pointer. |
| 3686 | |
| 3687 | The overlay_update function pokes around in the target's data structures |
| 3688 | to see what overlays are mapped, and updates GDB's overlay mapping with |
| 3689 | this information. |
| 3690 | |
| 3691 | In this simple implementation, the target data structures are as follows: |
| 3692 | unsigned _novlys; /# number of overlay sections #/ |
| 3693 | unsigned _ovly_table[_novlys][4] = { |
| 3694 | {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/ |
| 3695 | {..., ..., ..., ...}, |
| 3696 | } |
| 3697 | unsigned _novly_regions; /# number of overlay regions #/ |
| 3698 | unsigned _ovly_region_table[_novly_regions][3] = { |
| 3699 | {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/ |
| 3700 | {..., ..., ...}, |
| 3701 | } |
| 3702 | These functions will attempt to update GDB's mappedness state in the |
| 3703 | symbol section table, based on the target's mappedness state. |
| 3704 | |
| 3705 | To do this, we keep a cached copy of the target's _ovly_table, and |
| 3706 | attempt to detect when the cached copy is invalidated. The main |
| 3707 | entry point is "simple_overlay_update(SECT), which looks up SECT in |
| 3708 | the cached table and re-reads only the entry for that section from |
| 3709 | the target (whenever possible). |
| 3710 | */ |
| 3711 | |
| 3712 | /* Cached, dynamically allocated copies of the target data structures: */ |
| 3713 | static unsigned (*cache_ovly_table)[4] = 0; |
| 3714 | #if 0 |
| 3715 | static unsigned (*cache_ovly_region_table)[3] = 0; |
| 3716 | #endif |
| 3717 | static unsigned cache_novlys = 0; |
| 3718 | #if 0 |
| 3719 | static unsigned cache_novly_regions = 0; |
| 3720 | #endif |
| 3721 | static CORE_ADDR cache_ovly_table_base = 0; |
| 3722 | #if 0 |
| 3723 | static CORE_ADDR cache_ovly_region_table_base = 0; |
| 3724 | #endif |
| 3725 | enum ovly_index |
| 3726 | { |
| 3727 | VMA, SIZE, LMA, MAPPED |
| 3728 | }; |
| 3729 | #define TARGET_LONG_BYTES (gdbarch_long_bit (current_gdbarch) \ |
| 3730 | / TARGET_CHAR_BIT) |
| 3731 | |
| 3732 | /* Throw away the cached copy of _ovly_table */ |
| 3733 | static void |
| 3734 | simple_free_overlay_table (void) |
| 3735 | { |
| 3736 | if (cache_ovly_table) |
| 3737 | xfree (cache_ovly_table); |
| 3738 | cache_novlys = 0; |
| 3739 | cache_ovly_table = NULL; |
| 3740 | cache_ovly_table_base = 0; |
| 3741 | } |
| 3742 | |
| 3743 | #if 0 |
| 3744 | /* Throw away the cached copy of _ovly_region_table */ |
| 3745 | static void |
| 3746 | simple_free_overlay_region_table (void) |
| 3747 | { |
| 3748 | if (cache_ovly_region_table) |
| 3749 | xfree (cache_ovly_region_table); |
| 3750 | cache_novly_regions = 0; |
| 3751 | cache_ovly_region_table = NULL; |
| 3752 | cache_ovly_region_table_base = 0; |
| 3753 | } |
| 3754 | #endif |
| 3755 | |
| 3756 | /* Read an array of ints from the target into a local buffer. |
| 3757 | Convert to host order. int LEN is number of ints */ |
| 3758 | static void |
| 3759 | read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr, int len) |
| 3760 | { |
| 3761 | /* FIXME (alloca): Not safe if array is very large. */ |
| 3762 | gdb_byte *buf = alloca (len * TARGET_LONG_BYTES); |
| 3763 | int i; |
| 3764 | |
| 3765 | read_memory (memaddr, buf, len * TARGET_LONG_BYTES); |
| 3766 | for (i = 0; i < len; i++) |
| 3767 | myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf, |
| 3768 | TARGET_LONG_BYTES); |
| 3769 | } |
| 3770 | |
| 3771 | /* Find and grab a copy of the target _ovly_table |
| 3772 | (and _novlys, which is needed for the table's size) */ |
| 3773 | static int |
| 3774 | simple_read_overlay_table (void) |
| 3775 | { |
| 3776 | struct minimal_symbol *novlys_msym, *ovly_table_msym; |
| 3777 | |
| 3778 | simple_free_overlay_table (); |
| 3779 | novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL); |
| 3780 | if (! novlys_msym) |
| 3781 | { |
| 3782 | error (_("Error reading inferior's overlay table: " |
| 3783 | "couldn't find `_novlys' variable\n" |
| 3784 | "in inferior. Use `overlay manual' mode.")); |
| 3785 | return 0; |
| 3786 | } |
| 3787 | |
| 3788 | ovly_table_msym = lookup_minimal_symbol ("_ovly_table", NULL, NULL); |
| 3789 | if (! ovly_table_msym) |
| 3790 | { |
| 3791 | error (_("Error reading inferior's overlay table: couldn't find " |
| 3792 | "`_ovly_table' array\n" |
| 3793 | "in inferior. Use `overlay manual' mode.")); |
| 3794 | return 0; |
| 3795 | } |
| 3796 | |
| 3797 | cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym), 4); |
| 3798 | cache_ovly_table |
| 3799 | = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table)); |
| 3800 | cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym); |
| 3801 | read_target_long_array (cache_ovly_table_base, |
| 3802 | (unsigned int *) cache_ovly_table, |
| 3803 | cache_novlys * 4); |
| 3804 | |
| 3805 | return 1; /* SUCCESS */ |
| 3806 | } |
| 3807 | |
| 3808 | #if 0 |
| 3809 | /* Find and grab a copy of the target _ovly_region_table |
| 3810 | (and _novly_regions, which is needed for the table's size) */ |
| 3811 | static int |
| 3812 | simple_read_overlay_region_table (void) |
| 3813 | { |
| 3814 | struct minimal_symbol *msym; |
| 3815 | |
| 3816 | simple_free_overlay_region_table (); |
| 3817 | msym = lookup_minimal_symbol ("_novly_regions", NULL, NULL); |
| 3818 | if (msym != NULL) |
| 3819 | cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4); |
| 3820 | else |
| 3821 | return 0; /* failure */ |
| 3822 | cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12); |
| 3823 | if (cache_ovly_region_table != NULL) |
| 3824 | { |
| 3825 | msym = lookup_minimal_symbol ("_ovly_region_table", NULL, NULL); |
| 3826 | if (msym != NULL) |
| 3827 | { |
| 3828 | cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym); |
| 3829 | read_target_long_array (cache_ovly_region_table_base, |
| 3830 | (unsigned int *) cache_ovly_region_table, |
| 3831 | cache_novly_regions * 3); |
| 3832 | } |
| 3833 | else |
| 3834 | return 0; /* failure */ |
| 3835 | } |
| 3836 | else |
| 3837 | return 0; /* failure */ |
| 3838 | return 1; /* SUCCESS */ |
| 3839 | } |
| 3840 | #endif |
| 3841 | |
| 3842 | /* Function: simple_overlay_update_1 |
| 3843 | A helper function for simple_overlay_update. Assuming a cached copy |
| 3844 | of _ovly_table exists, look through it to find an entry whose vma, |
| 3845 | lma and size match those of OSECT. Re-read the entry and make sure |
| 3846 | it still matches OSECT (else the table may no longer be valid). |
| 3847 | Set OSECT's mapped state to match the entry. Return: 1 for |
| 3848 | success, 0 for failure. */ |
| 3849 | |
| 3850 | static int |
| 3851 | simple_overlay_update_1 (struct obj_section *osect) |
| 3852 | { |
| 3853 | int i, size; |
| 3854 | bfd *obfd = osect->objfile->obfd; |
| 3855 | asection *bsect = osect->the_bfd_section; |
| 3856 | |
| 3857 | size = bfd_get_section_size (osect->the_bfd_section); |
| 3858 | for (i = 0; i < cache_novlys; i++) |
| 3859 | if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) |
| 3860 | && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) |
| 3861 | /* && cache_ovly_table[i][SIZE] == size */ ) |
| 3862 | { |
| 3863 | read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES, |
| 3864 | (unsigned int *) cache_ovly_table[i], 4); |
| 3865 | if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) |
| 3866 | && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) |
| 3867 | /* && cache_ovly_table[i][SIZE] == size */ ) |
| 3868 | { |
| 3869 | osect->ovly_mapped = cache_ovly_table[i][MAPPED]; |
| 3870 | return 1; |
| 3871 | } |
| 3872 | else /* Warning! Warning! Target's ovly table has changed! */ |
| 3873 | return 0; |
| 3874 | } |
| 3875 | return 0; |
| 3876 | } |
| 3877 | |
| 3878 | /* Function: simple_overlay_update |
| 3879 | If OSECT is NULL, then update all sections' mapped state |
| 3880 | (after re-reading the entire target _ovly_table). |
| 3881 | If OSECT is non-NULL, then try to find a matching entry in the |
| 3882 | cached ovly_table and update only OSECT's mapped state. |
| 3883 | If a cached entry can't be found or the cache isn't valid, then |
| 3884 | re-read the entire cache, and go ahead and update all sections. */ |
| 3885 | |
| 3886 | void |
| 3887 | simple_overlay_update (struct obj_section *osect) |
| 3888 | { |
| 3889 | struct objfile *objfile; |
| 3890 | |
| 3891 | /* Were we given an osect to look up? NULL means do all of them. */ |
| 3892 | if (osect) |
| 3893 | /* Have we got a cached copy of the target's overlay table? */ |
| 3894 | if (cache_ovly_table != NULL) |
| 3895 | /* Does its cached location match what's currently in the symtab? */ |
| 3896 | if (cache_ovly_table_base == |
| 3897 | SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL, NULL))) |
| 3898 | /* Then go ahead and try to look up this single section in the cache */ |
| 3899 | if (simple_overlay_update_1 (osect)) |
| 3900 | /* Found it! We're done. */ |
| 3901 | return; |
| 3902 | |
| 3903 | /* Cached table no good: need to read the entire table anew. |
| 3904 | Or else we want all the sections, in which case it's actually |
| 3905 | more efficient to read the whole table in one block anyway. */ |
| 3906 | |
| 3907 | if (! simple_read_overlay_table ()) |
| 3908 | return; |
| 3909 | |
| 3910 | /* Now may as well update all sections, even if only one was requested. */ |
| 3911 | ALL_OBJSECTIONS (objfile, osect) |
| 3912 | if (section_is_overlay (osect->the_bfd_section)) |
| 3913 | { |
| 3914 | int i, size; |
| 3915 | bfd *obfd = osect->objfile->obfd; |
| 3916 | asection *bsect = osect->the_bfd_section; |
| 3917 | |
| 3918 | size = bfd_get_section_size (bsect); |
| 3919 | for (i = 0; i < cache_novlys; i++) |
| 3920 | if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) |
| 3921 | && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) |
| 3922 | /* && cache_ovly_table[i][SIZE] == size */ ) |
| 3923 | { /* obj_section matches i'th entry in ovly_table */ |
| 3924 | osect->ovly_mapped = cache_ovly_table[i][MAPPED]; |
| 3925 | break; /* finished with inner for loop: break out */ |
| 3926 | } |
| 3927 | } |
| 3928 | } |
| 3929 | |
| 3930 | /* Set the output sections and output offsets for section SECTP in |
| 3931 | ABFD. The relocation code in BFD will read these offsets, so we |
| 3932 | need to be sure they're initialized. We map each section to itself, |
| 3933 | with no offset; this means that SECTP->vma will be honored. */ |
| 3934 | |
| 3935 | static void |
| 3936 | symfile_dummy_outputs (bfd *abfd, asection *sectp, void *dummy) |
| 3937 | { |
| 3938 | sectp->output_section = sectp; |
| 3939 | sectp->output_offset = 0; |
| 3940 | } |
| 3941 | |
| 3942 | /* Relocate the contents of a debug section SECTP in ABFD. The |
| 3943 | contents are stored in BUF if it is non-NULL, or returned in a |
| 3944 | malloc'd buffer otherwise. |
| 3945 | |
| 3946 | For some platforms and debug info formats, shared libraries contain |
| 3947 | relocations against the debug sections (particularly for DWARF-2; |
| 3948 | one affected platform is PowerPC GNU/Linux, although it depends on |
| 3949 | the version of the linker in use). Also, ELF object files naturally |
| 3950 | have unresolved relocations for their debug sections. We need to apply |
| 3951 | the relocations in order to get the locations of symbols correct. */ |
| 3952 | |
| 3953 | bfd_byte * |
| 3954 | symfile_relocate_debug_section (bfd *abfd, asection *sectp, bfd_byte *buf) |
| 3955 | { |
| 3956 | /* We're only interested in debugging sections with relocation |
| 3957 | information. */ |
| 3958 | if ((sectp->flags & SEC_RELOC) == 0) |
| 3959 | return NULL; |
| 3960 | if ((sectp->flags & SEC_DEBUGGING) == 0) |
| 3961 | return NULL; |
| 3962 | |
| 3963 | /* We will handle section offsets properly elsewhere, so relocate as if |
| 3964 | all sections begin at 0. */ |
| 3965 | bfd_map_over_sections (abfd, symfile_dummy_outputs, NULL); |
| 3966 | |
| 3967 | return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL); |
| 3968 | } |
| 3969 | |
| 3970 | struct symfile_segment_data * |
| 3971 | get_symfile_segment_data (bfd *abfd) |
| 3972 | { |
| 3973 | struct sym_fns *sf = find_sym_fns (abfd); |
| 3974 | |
| 3975 | if (sf == NULL) |
| 3976 | return NULL; |
| 3977 | |
| 3978 | return sf->sym_segments (abfd); |
| 3979 | } |
| 3980 | |
| 3981 | void |
| 3982 | free_symfile_segment_data (struct symfile_segment_data *data) |
| 3983 | { |
| 3984 | xfree (data->segment_bases); |
| 3985 | xfree (data->segment_sizes); |
| 3986 | xfree (data->segment_info); |
| 3987 | xfree (data); |
| 3988 | } |
| 3989 | |
| 3990 | |
| 3991 | /* Given: |
| 3992 | - DATA, containing segment addresses from the object file ABFD, and |
| 3993 | the mapping from ABFD's sections onto the segments that own them, |
| 3994 | and |
| 3995 | - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual |
| 3996 | segment addresses reported by the target, |
| 3997 | store the appropriate offsets for each section in OFFSETS. |
| 3998 | |
| 3999 | If there are fewer entries in SEGMENT_BASES than there are segments |
| 4000 | in DATA, then apply SEGMENT_BASES' last entry to all the segments. |
| 4001 | |
| 4002 | If there are more, then verify that all the excess addresses are |
| 4003 | the same as the last legitimate one, and then ignore them. This |
| 4004 | allows "TextSeg=X;DataSeg=X" qOffset replies for files which have |
| 4005 | only a single segment. */ |
| 4006 | int |
| 4007 | symfile_map_offsets_to_segments (bfd *abfd, struct symfile_segment_data *data, |
| 4008 | struct section_offsets *offsets, |
| 4009 | int num_segment_bases, |
| 4010 | const CORE_ADDR *segment_bases) |
| 4011 | { |
| 4012 | int i; |
| 4013 | asection *sect; |
| 4014 | |
| 4015 | /* It doesn't make sense to call this function unless you have some |
| 4016 | segment base addresses. */ |
| 4017 | gdb_assert (segment_bases > 0); |
| 4018 | |
| 4019 | /* If we do not have segment mappings for the object file, we |
| 4020 | can not relocate it by segments. */ |
| 4021 | gdb_assert (data != NULL); |
| 4022 | gdb_assert (data->num_segments > 0); |
| 4023 | |
| 4024 | /* Check any extra SEGMENT_BASES entries. */ |
| 4025 | if (num_segment_bases > data->num_segments) |
| 4026 | for (i = data->num_segments; i < num_segment_bases; i++) |
| 4027 | if (segment_bases[i] != segment_bases[data->num_segments - 1]) |
| 4028 | return 0; |
| 4029 | |
| 4030 | for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next) |
| 4031 | { |
| 4032 | int which = data->segment_info[i]; |
| 4033 | |
| 4034 | gdb_assert (0 <= which && which <= data->num_segments); |
| 4035 | |
| 4036 | /* Don't bother computing offsets for sections that aren't |
| 4037 | loaded as part of any segment. */ |
| 4038 | if (! which) |
| 4039 | continue; |
| 4040 | |
| 4041 | /* Use the last SEGMENT_BASES entry as the address of any extra |
| 4042 | segments mentioned in DATA->segment_info. */ |
| 4043 | if (which > num_segment_bases) |
| 4044 | which = num_segment_bases; |
| 4045 | |
| 4046 | offsets->offsets[i] = (segment_bases[which - 1] |
| 4047 | - data->segment_bases[which - 1]); |
| 4048 | } |
| 4049 | |
| 4050 | return 1; |
| 4051 | } |
| 4052 | |
| 4053 | static void |
| 4054 | symfile_find_segment_sections (struct objfile *objfile) |
| 4055 | { |
| 4056 | bfd *abfd = objfile->obfd; |
| 4057 | int i; |
| 4058 | asection *sect; |
| 4059 | struct symfile_segment_data *data; |
| 4060 | |
| 4061 | data = get_symfile_segment_data (objfile->obfd); |
| 4062 | if (data == NULL) |
| 4063 | return; |
| 4064 | |
| 4065 | if (data->num_segments != 1 && data->num_segments != 2) |
| 4066 | { |
| 4067 | free_symfile_segment_data (data); |
| 4068 | return; |
| 4069 | } |
| 4070 | |
| 4071 | for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next) |
| 4072 | { |
| 4073 | CORE_ADDR vma; |
| 4074 | int which = data->segment_info[i]; |
| 4075 | |
| 4076 | if (which == 1) |
| 4077 | { |
| 4078 | if (objfile->sect_index_text == -1) |
| 4079 | objfile->sect_index_text = sect->index; |
| 4080 | |
| 4081 | if (objfile->sect_index_rodata == -1) |
| 4082 | objfile->sect_index_rodata = sect->index; |
| 4083 | } |
| 4084 | else if (which == 2) |
| 4085 | { |
| 4086 | if (objfile->sect_index_data == -1) |
| 4087 | objfile->sect_index_data = sect->index; |
| 4088 | |
| 4089 | if (objfile->sect_index_bss == -1) |
| 4090 | objfile->sect_index_bss = sect->index; |
| 4091 | } |
| 4092 | } |
| 4093 | |
| 4094 | free_symfile_segment_data (data); |
| 4095 | } |
| 4096 | |
| 4097 | void |
| 4098 | _initialize_symfile (void) |
| 4099 | { |
| 4100 | struct cmd_list_element *c; |
| 4101 | |
| 4102 | c = add_cmd ("symbol-file", class_files, symbol_file_command, _("\ |
| 4103 | Load symbol table from executable file FILE.\n\ |
| 4104 | The `file' command can also load symbol tables, as well as setting the file\n\ |
| 4105 | to execute."), &cmdlist); |
| 4106 | set_cmd_completer (c, filename_completer); |
| 4107 | |
| 4108 | c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, _("\ |
| 4109 | Load symbols from FILE, assuming FILE has been dynamically loaded.\n\ |
| 4110 | Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\ |
| 4111 | ADDR is the starting address of the file's text.\n\ |
| 4112 | The optional arguments are section-name section-address pairs and\n\ |
| 4113 | should be specified if the data and bss segments are not contiguous\n\ |
| 4114 | with the text. SECT is a section name to be loaded at SECT_ADDR."), |
| 4115 | &cmdlist); |
| 4116 | set_cmd_completer (c, filename_completer); |
| 4117 | |
| 4118 | c = add_cmd ("add-shared-symbol-files", class_files, |
| 4119 | add_shared_symbol_files_command, _("\ |
| 4120 | Load the symbols from shared objects in the dynamic linker's link map."), |
| 4121 | &cmdlist); |
| 4122 | c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1, |
| 4123 | &cmdlist); |
| 4124 | |
| 4125 | c = add_cmd ("load", class_files, load_command, _("\ |
| 4126 | Dynamically load FILE into the running program, and record its symbols\n\ |
| 4127 | for access from GDB.\n\ |
| 4128 | A load OFFSET may also be given."), &cmdlist); |
| 4129 | set_cmd_completer (c, filename_completer); |
| 4130 | |
| 4131 | add_setshow_boolean_cmd ("symbol-reloading", class_support, |
| 4132 | &symbol_reloading, _("\ |
| 4133 | Set dynamic symbol table reloading multiple times in one run."), _("\ |
| 4134 | Show dynamic symbol table reloading multiple times in one run."), NULL, |
| 4135 | NULL, |
| 4136 | show_symbol_reloading, |
| 4137 | &setlist, &showlist); |
| 4138 | |
| 4139 | add_prefix_cmd ("overlay", class_support, overlay_command, |
| 4140 | _("Commands for debugging overlays."), &overlaylist, |
| 4141 | "overlay ", 0, &cmdlist); |
| 4142 | |
| 4143 | add_com_alias ("ovly", "overlay", class_alias, 1); |
| 4144 | add_com_alias ("ov", "overlay", class_alias, 1); |
| 4145 | |
| 4146 | add_cmd ("map-overlay", class_support, map_overlay_command, |
| 4147 | _("Assert that an overlay section is mapped."), &overlaylist); |
| 4148 | |
| 4149 | add_cmd ("unmap-overlay", class_support, unmap_overlay_command, |
| 4150 | _("Assert that an overlay section is unmapped."), &overlaylist); |
| 4151 | |
| 4152 | add_cmd ("list-overlays", class_support, list_overlays_command, |
| 4153 | _("List mappings of overlay sections."), &overlaylist); |
| 4154 | |
| 4155 | add_cmd ("manual", class_support, overlay_manual_command, |
| 4156 | _("Enable overlay debugging."), &overlaylist); |
| 4157 | add_cmd ("off", class_support, overlay_off_command, |
| 4158 | _("Disable overlay debugging."), &overlaylist); |
| 4159 | add_cmd ("auto", class_support, overlay_auto_command, |
| 4160 | _("Enable automatic overlay debugging."), &overlaylist); |
| 4161 | add_cmd ("load-target", class_support, overlay_load_command, |
| 4162 | _("Read the overlay mapping state from the target."), &overlaylist); |
| 4163 | |
| 4164 | /* Filename extension to source language lookup table: */ |
| 4165 | init_filename_language_table (); |
| 4166 | add_setshow_string_noescape_cmd ("extension-language", class_files, |
| 4167 | &ext_args, _("\ |
| 4168 | Set mapping between filename extension and source language."), _("\ |
| 4169 | Show mapping between filename extension and source language."), _("\ |
| 4170 | Usage: set extension-language .foo bar"), |
| 4171 | set_ext_lang_command, |
| 4172 | show_ext_args, |
| 4173 | &setlist, &showlist); |
| 4174 | |
| 4175 | add_info ("extensions", info_ext_lang_command, |
| 4176 | _("All filename extensions associated with a source language.")); |
| 4177 | |
| 4178 | add_setshow_optional_filename_cmd ("debug-file-directory", class_support, |
| 4179 | &debug_file_directory, _("\ |
| 4180 | Set the directory where separate debug symbols are searched for."), _("\ |
| 4181 | Show the directory where separate debug symbols are searched for."), _("\ |
| 4182 | Separate debug symbols are first searched for in the same\n\ |
| 4183 | directory as the binary, then in the `" DEBUG_SUBDIRECTORY "' subdirectory,\n\ |
| 4184 | and lastly at the path of the directory of the binary with\n\ |
| 4185 | the global debug-file directory prepended."), |
| 4186 | NULL, |
| 4187 | show_debug_file_directory, |
| 4188 | &setlist, &showlist); |
| 4189 | } |