| 1 | /* GDB routines for manipulating objfiles. |
| 2 | |
| 3 | Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
| 4 | 2002, 2003, 2004, 2007, 2008 Free Software Foundation, Inc. |
| 5 | |
| 6 | Contributed by Cygnus Support, using pieces from other GDB modules. |
| 7 | |
| 8 | This file is part of GDB. |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 3 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 22 | |
| 23 | /* This file contains support routines for creating, manipulating, and |
| 24 | destroying objfile structures. */ |
| 25 | |
| 26 | #include "defs.h" |
| 27 | #include "bfd.h" /* Binary File Description */ |
| 28 | #include "symtab.h" |
| 29 | #include "symfile.h" |
| 30 | #include "objfiles.h" |
| 31 | #include "gdb-stabs.h" |
| 32 | #include "target.h" |
| 33 | #include "bcache.h" |
| 34 | #include "mdebugread.h" |
| 35 | #include "expression.h" |
| 36 | #include "parser-defs.h" |
| 37 | |
| 38 | #include "gdb_assert.h" |
| 39 | #include <sys/types.h> |
| 40 | #include "gdb_stat.h" |
| 41 | #include <fcntl.h> |
| 42 | #include "gdb_obstack.h" |
| 43 | #include "gdb_string.h" |
| 44 | #include "hashtab.h" |
| 45 | |
| 46 | #include "breakpoint.h" |
| 47 | #include "block.h" |
| 48 | #include "dictionary.h" |
| 49 | #include "source.h" |
| 50 | #include "addrmap.h" |
| 51 | |
| 52 | /* Prototypes for local functions */ |
| 53 | |
| 54 | static void objfile_alloc_data (struct objfile *objfile); |
| 55 | static void objfile_free_data (struct objfile *objfile); |
| 56 | |
| 57 | /* Externally visible variables that are owned by this module. |
| 58 | See declarations in objfile.h for more info. */ |
| 59 | |
| 60 | struct objfile *object_files; /* Linked list of all objfiles */ |
| 61 | struct objfile *current_objfile; /* For symbol file being read in */ |
| 62 | struct objfile *symfile_objfile; /* Main symbol table loaded from */ |
| 63 | struct objfile *rt_common_objfile; /* For runtime common symbols */ |
| 64 | |
| 65 | /* Locate all mappable sections of a BFD file. |
| 66 | objfile_p_char is a char * to get it through |
| 67 | bfd_map_over_sections; we cast it back to its proper type. */ |
| 68 | |
| 69 | #ifndef TARGET_KEEP_SECTION |
| 70 | #define TARGET_KEEP_SECTION(ASECT) 0 |
| 71 | #endif |
| 72 | |
| 73 | /* Called via bfd_map_over_sections to build up the section table that |
| 74 | the objfile references. The objfile contains pointers to the start |
| 75 | of the table (objfile->sections) and to the first location after |
| 76 | the end of the table (objfile->sections_end). */ |
| 77 | |
| 78 | static void |
| 79 | add_to_objfile_sections (struct bfd *abfd, struct bfd_section *asect, |
| 80 | void *objfile_p_char) |
| 81 | { |
| 82 | struct objfile *objfile = (struct objfile *) objfile_p_char; |
| 83 | struct obj_section section; |
| 84 | flagword aflag; |
| 85 | |
| 86 | aflag = bfd_get_section_flags (abfd, asect); |
| 87 | |
| 88 | if (!(aflag & SEC_ALLOC) && !(TARGET_KEEP_SECTION (asect))) |
| 89 | return; |
| 90 | |
| 91 | if (0 == bfd_section_size (abfd, asect)) |
| 92 | return; |
| 93 | section.offset = 0; |
| 94 | section.objfile = objfile; |
| 95 | section.the_bfd_section = asect; |
| 96 | section.ovly_mapped = 0; |
| 97 | section.addr = bfd_section_vma (abfd, asect); |
| 98 | section.endaddr = section.addr + bfd_section_size (abfd, asect); |
| 99 | obstack_grow (&objfile->objfile_obstack, (char *) §ion, sizeof (section)); |
| 100 | objfile->sections_end = (struct obj_section *) (((unsigned long) objfile->sections_end) + 1); |
| 101 | } |
| 102 | |
| 103 | /* Builds a section table for OBJFILE. |
| 104 | Returns 0 if OK, 1 on error (in which case bfd_error contains the |
| 105 | error). |
| 106 | |
| 107 | Note that while we are building the table, which goes into the |
| 108 | psymbol obstack, we hijack the sections_end pointer to instead hold |
| 109 | a count of the number of sections. When bfd_map_over_sections |
| 110 | returns, this count is used to compute the pointer to the end of |
| 111 | the sections table, which then overwrites the count. |
| 112 | |
| 113 | Also note that the OFFSET and OVLY_MAPPED in each table entry |
| 114 | are initialized to zero. |
| 115 | |
| 116 | Also note that if anything else writes to the psymbol obstack while |
| 117 | we are building the table, we're pretty much hosed. */ |
| 118 | |
| 119 | int |
| 120 | build_objfile_section_table (struct objfile *objfile) |
| 121 | { |
| 122 | /* objfile->sections can be already set when reading a mapped symbol |
| 123 | file. I believe that we do need to rebuild the section table in |
| 124 | this case (we rebuild other things derived from the bfd), but we |
| 125 | can't free the old one (it's in the objfile_obstack). So we just |
| 126 | waste some memory. */ |
| 127 | |
| 128 | objfile->sections_end = 0; |
| 129 | bfd_map_over_sections (objfile->obfd, add_to_objfile_sections, (char *) objfile); |
| 130 | objfile->sections = (struct obj_section *) |
| 131 | obstack_finish (&objfile->objfile_obstack); |
| 132 | objfile->sections_end = objfile->sections + (unsigned long) objfile->sections_end; |
| 133 | return (0); |
| 134 | } |
| 135 | |
| 136 | /* Given a pointer to an initialized bfd (ABFD) and some flag bits |
| 137 | allocate a new objfile struct, fill it in as best we can, link it |
| 138 | into the list of all known objfiles, and return a pointer to the |
| 139 | new objfile struct. |
| 140 | |
| 141 | The FLAGS word contains various bits (OBJF_*) that can be taken as |
| 142 | requests for specific operations. Other bits like OBJF_SHARED are |
| 143 | simply copied through to the new objfile flags member. */ |
| 144 | |
| 145 | /* NOTE: carlton/2003-02-04: This function is called with args NULL, 0 |
| 146 | by jv-lang.c, to create an artificial objfile used to hold |
| 147 | information about dynamically-loaded Java classes. Unfortunately, |
| 148 | that branch of this function doesn't get tested very frequently, so |
| 149 | it's prone to breakage. (E.g. at one time the name was set to NULL |
| 150 | in that situation, which broke a loop over all names in the dynamic |
| 151 | library loader.) If you change this function, please try to leave |
| 152 | things in a consistent state even if abfd is NULL. */ |
| 153 | |
| 154 | struct objfile * |
| 155 | allocate_objfile (bfd *abfd, int flags) |
| 156 | { |
| 157 | struct objfile *objfile = NULL; |
| 158 | struct objfile *last_one = NULL; |
| 159 | |
| 160 | /* If we don't support mapped symbol files, didn't ask for the file to be |
| 161 | mapped, or failed to open the mapped file for some reason, then revert |
| 162 | back to an unmapped objfile. */ |
| 163 | |
| 164 | if (objfile == NULL) |
| 165 | { |
| 166 | objfile = (struct objfile *) xmalloc (sizeof (struct objfile)); |
| 167 | memset (objfile, 0, sizeof (struct objfile)); |
| 168 | objfile->md = NULL; |
| 169 | objfile->psymbol_cache = bcache_xmalloc (); |
| 170 | objfile->macro_cache = bcache_xmalloc (); |
| 171 | /* We could use obstack_specify_allocation here instead, but |
| 172 | gdb_obstack.h specifies the alloc/dealloc functions. */ |
| 173 | obstack_init (&objfile->objfile_obstack); |
| 174 | terminate_minimal_symbol_table (objfile); |
| 175 | } |
| 176 | |
| 177 | objfile_alloc_data (objfile); |
| 178 | |
| 179 | /* Update the per-objfile information that comes from the bfd, ensuring |
| 180 | that any data that is reference is saved in the per-objfile data |
| 181 | region. */ |
| 182 | |
| 183 | objfile->obfd = abfd; |
| 184 | if (objfile->name != NULL) |
| 185 | { |
| 186 | xfree (objfile->name); |
| 187 | } |
| 188 | if (abfd != NULL) |
| 189 | { |
| 190 | objfile->name = xstrdup (bfd_get_filename (abfd)); |
| 191 | objfile->mtime = bfd_get_mtime (abfd); |
| 192 | |
| 193 | /* Build section table. */ |
| 194 | |
| 195 | if (build_objfile_section_table (objfile)) |
| 196 | { |
| 197 | error (_("Can't find the file sections in `%s': %s"), |
| 198 | objfile->name, bfd_errmsg (bfd_get_error ())); |
| 199 | } |
| 200 | } |
| 201 | else |
| 202 | { |
| 203 | objfile->name = xstrdup ("<<anonymous objfile>>"); |
| 204 | } |
| 205 | |
| 206 | /* Initialize the section indexes for this objfile, so that we can |
| 207 | later detect if they are used w/o being properly assigned to. */ |
| 208 | |
| 209 | objfile->sect_index_text = -1; |
| 210 | objfile->sect_index_data = -1; |
| 211 | objfile->sect_index_bss = -1; |
| 212 | objfile->sect_index_rodata = -1; |
| 213 | |
| 214 | /* We don't yet have a C++-specific namespace symtab. */ |
| 215 | |
| 216 | objfile->cp_namespace_symtab = NULL; |
| 217 | |
| 218 | /* Add this file onto the tail of the linked list of other such files. */ |
| 219 | |
| 220 | objfile->next = NULL; |
| 221 | if (object_files == NULL) |
| 222 | object_files = objfile; |
| 223 | else |
| 224 | { |
| 225 | for (last_one = object_files; |
| 226 | last_one->next; |
| 227 | last_one = last_one->next); |
| 228 | last_one->next = objfile; |
| 229 | } |
| 230 | |
| 231 | /* Save passed in flag bits. */ |
| 232 | objfile->flags |= flags; |
| 233 | |
| 234 | return (objfile); |
| 235 | } |
| 236 | |
| 237 | /* Initialize entry point information for this objfile. */ |
| 238 | |
| 239 | void |
| 240 | init_entry_point_info (struct objfile *objfile) |
| 241 | { |
| 242 | /* Save startup file's range of PC addresses to help blockframe.c |
| 243 | decide where the bottom of the stack is. */ |
| 244 | |
| 245 | if (bfd_get_file_flags (objfile->obfd) & EXEC_P) |
| 246 | { |
| 247 | /* Executable file -- record its entry point so we'll recognize |
| 248 | the startup file because it contains the entry point. */ |
| 249 | objfile->ei.entry_point = bfd_get_start_address (objfile->obfd); |
| 250 | } |
| 251 | else |
| 252 | { |
| 253 | /* Examination of non-executable.o files. Short-circuit this stuff. */ |
| 254 | objfile->ei.entry_point = INVALID_ENTRY_POINT; |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | /* Get current entry point address. */ |
| 259 | |
| 260 | CORE_ADDR |
| 261 | entry_point_address (void) |
| 262 | { |
| 263 | return symfile_objfile ? symfile_objfile->ei.entry_point : 0; |
| 264 | } |
| 265 | |
| 266 | /* Create the terminating entry of OBJFILE's minimal symbol table. |
| 267 | If OBJFILE->msymbols is zero, allocate a single entry from |
| 268 | OBJFILE->objfile_obstack; otherwise, just initialize |
| 269 | OBJFILE->msymbols[OBJFILE->minimal_symbol_count]. */ |
| 270 | void |
| 271 | terminate_minimal_symbol_table (struct objfile *objfile) |
| 272 | { |
| 273 | if (! objfile->msymbols) |
| 274 | objfile->msymbols = ((struct minimal_symbol *) |
| 275 | obstack_alloc (&objfile->objfile_obstack, |
| 276 | sizeof (objfile->msymbols[0]))); |
| 277 | |
| 278 | { |
| 279 | struct minimal_symbol *m |
| 280 | = &objfile->msymbols[objfile->minimal_symbol_count]; |
| 281 | |
| 282 | memset (m, 0, sizeof (*m)); |
| 283 | /* Don't rely on these enumeration values being 0's. */ |
| 284 | MSYMBOL_TYPE (m) = mst_unknown; |
| 285 | SYMBOL_INIT_LANGUAGE_SPECIFIC (m, language_unknown); |
| 286 | } |
| 287 | } |
| 288 | |
| 289 | |
| 290 | /* Put one object file before a specified on in the global list. |
| 291 | This can be used to make sure an object file is destroyed before |
| 292 | another when using ALL_OBJFILES_SAFE to free all objfiles. */ |
| 293 | void |
| 294 | put_objfile_before (struct objfile *objfile, struct objfile *before_this) |
| 295 | { |
| 296 | struct objfile **objp; |
| 297 | |
| 298 | unlink_objfile (objfile); |
| 299 | |
| 300 | for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) |
| 301 | { |
| 302 | if (*objp == before_this) |
| 303 | { |
| 304 | objfile->next = *objp; |
| 305 | *objp = objfile; |
| 306 | return; |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | internal_error (__FILE__, __LINE__, |
| 311 | _("put_objfile_before: before objfile not in list")); |
| 312 | } |
| 313 | |
| 314 | /* Put OBJFILE at the front of the list. */ |
| 315 | |
| 316 | void |
| 317 | objfile_to_front (struct objfile *objfile) |
| 318 | { |
| 319 | struct objfile **objp; |
| 320 | for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) |
| 321 | { |
| 322 | if (*objp == objfile) |
| 323 | { |
| 324 | /* Unhook it from where it is. */ |
| 325 | *objp = objfile->next; |
| 326 | /* Put it in the front. */ |
| 327 | objfile->next = object_files; |
| 328 | object_files = objfile; |
| 329 | break; |
| 330 | } |
| 331 | } |
| 332 | } |
| 333 | |
| 334 | /* Unlink OBJFILE from the list of known objfiles, if it is found in the |
| 335 | list. |
| 336 | |
| 337 | It is not a bug, or error, to call this function if OBJFILE is not known |
| 338 | to be in the current list. This is done in the case of mapped objfiles, |
| 339 | for example, just to ensure that the mapped objfile doesn't appear twice |
| 340 | in the list. Since the list is threaded, linking in a mapped objfile |
| 341 | twice would create a circular list. |
| 342 | |
| 343 | If OBJFILE turns out to be in the list, we zap it's NEXT pointer after |
| 344 | unlinking it, just to ensure that we have completely severed any linkages |
| 345 | between the OBJFILE and the list. */ |
| 346 | |
| 347 | void |
| 348 | unlink_objfile (struct objfile *objfile) |
| 349 | { |
| 350 | struct objfile **objpp; |
| 351 | |
| 352 | for (objpp = &object_files; *objpp != NULL; objpp = &((*objpp)->next)) |
| 353 | { |
| 354 | if (*objpp == objfile) |
| 355 | { |
| 356 | *objpp = (*objpp)->next; |
| 357 | objfile->next = NULL; |
| 358 | return; |
| 359 | } |
| 360 | } |
| 361 | |
| 362 | internal_error (__FILE__, __LINE__, |
| 363 | _("unlink_objfile: objfile already unlinked")); |
| 364 | } |
| 365 | |
| 366 | |
| 367 | /* Destroy an objfile and all the symtabs and psymtabs under it. Note |
| 368 | that as much as possible is allocated on the objfile_obstack |
| 369 | so that the memory can be efficiently freed. |
| 370 | |
| 371 | Things which we do NOT free because they are not in malloc'd memory |
| 372 | or not in memory specific to the objfile include: |
| 373 | |
| 374 | objfile -> sf |
| 375 | |
| 376 | FIXME: If the objfile is using reusable symbol information (via mmalloc), |
| 377 | then we need to take into account the fact that more than one process |
| 378 | may be using the symbol information at the same time (when mmalloc is |
| 379 | extended to support cooperative locking). When more than one process |
| 380 | is using the mapped symbol info, we need to be more careful about when |
| 381 | we free objects in the reusable area. */ |
| 382 | |
| 383 | void |
| 384 | free_objfile (struct objfile *objfile) |
| 385 | { |
| 386 | if (objfile->separate_debug_objfile) |
| 387 | { |
| 388 | free_objfile (objfile->separate_debug_objfile); |
| 389 | } |
| 390 | |
| 391 | if (objfile->separate_debug_objfile_backlink) |
| 392 | { |
| 393 | /* We freed the separate debug file, make sure the base objfile |
| 394 | doesn't reference it. */ |
| 395 | objfile->separate_debug_objfile_backlink->separate_debug_objfile = NULL; |
| 396 | } |
| 397 | |
| 398 | /* Remove any references to this objfile in the global value |
| 399 | lists. */ |
| 400 | preserve_values (objfile); |
| 401 | |
| 402 | /* First do any symbol file specific actions required when we are |
| 403 | finished with a particular symbol file. Note that if the objfile |
| 404 | is using reusable symbol information (via mmalloc) then each of |
| 405 | these routines is responsible for doing the correct thing, either |
| 406 | freeing things which are valid only during this particular gdb |
| 407 | execution, or leaving them to be reused during the next one. */ |
| 408 | |
| 409 | if (objfile->sf != NULL) |
| 410 | { |
| 411 | (*objfile->sf->sym_finish) (objfile); |
| 412 | } |
| 413 | |
| 414 | /* We always close the bfd. */ |
| 415 | |
| 416 | if (objfile->obfd != NULL) |
| 417 | { |
| 418 | char *name = bfd_get_filename (objfile->obfd); |
| 419 | if (!bfd_close (objfile->obfd)) |
| 420 | warning (_("cannot close \"%s\": %s"), |
| 421 | name, bfd_errmsg (bfd_get_error ())); |
| 422 | xfree (name); |
| 423 | } |
| 424 | |
| 425 | /* Remove it from the chain of all objfiles. */ |
| 426 | |
| 427 | unlink_objfile (objfile); |
| 428 | |
| 429 | /* If we are going to free the runtime common objfile, mark it |
| 430 | as unallocated. */ |
| 431 | |
| 432 | if (objfile == rt_common_objfile) |
| 433 | rt_common_objfile = NULL; |
| 434 | |
| 435 | /* Before the symbol table code was redone to make it easier to |
| 436 | selectively load and remove information particular to a specific |
| 437 | linkage unit, gdb used to do these things whenever the monolithic |
| 438 | symbol table was blown away. How much still needs to be done |
| 439 | is unknown, but we play it safe for now and keep each action until |
| 440 | it is shown to be no longer needed. */ |
| 441 | |
| 442 | /* Not all our callers call clear_symtab_users (objfile_purge_solibs, |
| 443 | for example), so we need to call this here. */ |
| 444 | clear_pc_function_cache (); |
| 445 | |
| 446 | /* Clear globals which might have pointed into a removed objfile. |
| 447 | FIXME: It's not clear which of these are supposed to persist |
| 448 | between expressions and which ought to be reset each time. */ |
| 449 | expression_context_block = NULL; |
| 450 | innermost_block = NULL; |
| 451 | |
| 452 | /* Check to see if the current_source_symtab belongs to this objfile, |
| 453 | and if so, call clear_current_source_symtab_and_line. */ |
| 454 | |
| 455 | { |
| 456 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); |
| 457 | struct symtab *s; |
| 458 | |
| 459 | ALL_OBJFILE_SYMTABS (objfile, s) |
| 460 | { |
| 461 | if (s == cursal.symtab) |
| 462 | clear_current_source_symtab_and_line (); |
| 463 | } |
| 464 | } |
| 465 | |
| 466 | /* The last thing we do is free the objfile struct itself. */ |
| 467 | |
| 468 | objfile_free_data (objfile); |
| 469 | if (objfile->name != NULL) |
| 470 | { |
| 471 | xfree (objfile->name); |
| 472 | } |
| 473 | if (objfile->global_psymbols.list) |
| 474 | xfree (objfile->global_psymbols.list); |
| 475 | if (objfile->static_psymbols.list) |
| 476 | xfree (objfile->static_psymbols.list); |
| 477 | /* Free the obstacks for non-reusable objfiles */ |
| 478 | bcache_xfree (objfile->psymbol_cache); |
| 479 | bcache_xfree (objfile->macro_cache); |
| 480 | if (objfile->demangled_names_hash) |
| 481 | htab_delete (objfile->demangled_names_hash); |
| 482 | obstack_free (&objfile->objfile_obstack, 0); |
| 483 | xfree (objfile); |
| 484 | objfile = NULL; |
| 485 | } |
| 486 | |
| 487 | static void |
| 488 | do_free_objfile_cleanup (void *obj) |
| 489 | { |
| 490 | free_objfile (obj); |
| 491 | } |
| 492 | |
| 493 | struct cleanup * |
| 494 | make_cleanup_free_objfile (struct objfile *obj) |
| 495 | { |
| 496 | return make_cleanup (do_free_objfile_cleanup, obj); |
| 497 | } |
| 498 | |
| 499 | /* Free all the object files at once and clean up their users. */ |
| 500 | |
| 501 | void |
| 502 | free_all_objfiles (void) |
| 503 | { |
| 504 | struct objfile *objfile, *temp; |
| 505 | |
| 506 | ALL_OBJFILES_SAFE (objfile, temp) |
| 507 | { |
| 508 | free_objfile (objfile); |
| 509 | } |
| 510 | clear_symtab_users (); |
| 511 | } |
| 512 | \f |
| 513 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS |
| 514 | entries in new_offsets. */ |
| 515 | void |
| 516 | objfile_relocate (struct objfile *objfile, struct section_offsets *new_offsets) |
| 517 | { |
| 518 | struct section_offsets *delta = |
| 519 | ((struct section_offsets *) |
| 520 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections))); |
| 521 | |
| 522 | { |
| 523 | int i; |
| 524 | int something_changed = 0; |
| 525 | for (i = 0; i < objfile->num_sections; ++i) |
| 526 | { |
| 527 | delta->offsets[i] = |
| 528 | ANOFFSET (new_offsets, i) - ANOFFSET (objfile->section_offsets, i); |
| 529 | if (ANOFFSET (delta, i) != 0) |
| 530 | something_changed = 1; |
| 531 | } |
| 532 | if (!something_changed) |
| 533 | return; |
| 534 | } |
| 535 | |
| 536 | /* OK, get all the symtabs. */ |
| 537 | { |
| 538 | struct symtab *s; |
| 539 | |
| 540 | ALL_OBJFILE_SYMTABS (objfile, s) |
| 541 | { |
| 542 | struct linetable *l; |
| 543 | struct blockvector *bv; |
| 544 | int i; |
| 545 | |
| 546 | /* First the line table. */ |
| 547 | l = LINETABLE (s); |
| 548 | if (l) |
| 549 | { |
| 550 | for (i = 0; i < l->nitems; ++i) |
| 551 | l->item[i].pc += ANOFFSET (delta, s->block_line_section); |
| 552 | } |
| 553 | |
| 554 | /* Don't relocate a shared blockvector more than once. */ |
| 555 | if (!s->primary) |
| 556 | continue; |
| 557 | |
| 558 | bv = BLOCKVECTOR (s); |
| 559 | for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); ++i) |
| 560 | { |
| 561 | struct block *b; |
| 562 | struct symbol *sym; |
| 563 | struct dict_iterator iter; |
| 564 | |
| 565 | b = BLOCKVECTOR_BLOCK (bv, i); |
| 566 | BLOCK_START (b) += ANOFFSET (delta, s->block_line_section); |
| 567 | BLOCK_END (b) += ANOFFSET (delta, s->block_line_section); |
| 568 | if (BLOCKVECTOR_MAP (bv)) |
| 569 | addrmap_relocate (BLOCKVECTOR_MAP (bv), |
| 570 | ANOFFSET (delta, s->block_line_section)); |
| 571 | |
| 572 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 573 | { |
| 574 | fixup_symbol_section (sym, objfile); |
| 575 | |
| 576 | /* The RS6000 code from which this was taken skipped |
| 577 | any symbols in STRUCT_DOMAIN or UNDEF_DOMAIN. |
| 578 | But I'm leaving out that test, on the theory that |
| 579 | they can't possibly pass the tests below. */ |
| 580 | if ((SYMBOL_CLASS (sym) == LOC_LABEL |
| 581 | || SYMBOL_CLASS (sym) == LOC_STATIC |
| 582 | || SYMBOL_CLASS (sym) == LOC_INDIRECT) |
| 583 | && SYMBOL_SECTION (sym) >= 0) |
| 584 | { |
| 585 | SYMBOL_VALUE_ADDRESS (sym) += |
| 586 | ANOFFSET (delta, SYMBOL_SECTION (sym)); |
| 587 | } |
| 588 | } |
| 589 | } |
| 590 | } |
| 591 | } |
| 592 | |
| 593 | { |
| 594 | struct partial_symtab *p; |
| 595 | |
| 596 | ALL_OBJFILE_PSYMTABS (objfile, p) |
| 597 | { |
| 598 | p->textlow += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); |
| 599 | p->texthigh += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); |
| 600 | } |
| 601 | } |
| 602 | |
| 603 | { |
| 604 | struct partial_symbol **psym; |
| 605 | |
| 606 | for (psym = objfile->global_psymbols.list; |
| 607 | psym < objfile->global_psymbols.next; |
| 608 | psym++) |
| 609 | { |
| 610 | fixup_psymbol_section (*psym, objfile); |
| 611 | if (SYMBOL_SECTION (*psym) >= 0) |
| 612 | SYMBOL_VALUE_ADDRESS (*psym) += ANOFFSET (delta, |
| 613 | SYMBOL_SECTION (*psym)); |
| 614 | } |
| 615 | for (psym = objfile->static_psymbols.list; |
| 616 | psym < objfile->static_psymbols.next; |
| 617 | psym++) |
| 618 | { |
| 619 | fixup_psymbol_section (*psym, objfile); |
| 620 | if (SYMBOL_SECTION (*psym) >= 0) |
| 621 | SYMBOL_VALUE_ADDRESS (*psym) += ANOFFSET (delta, |
| 622 | SYMBOL_SECTION (*psym)); |
| 623 | } |
| 624 | } |
| 625 | |
| 626 | { |
| 627 | struct minimal_symbol *msym; |
| 628 | ALL_OBJFILE_MSYMBOLS (objfile, msym) |
| 629 | if (SYMBOL_SECTION (msym) >= 0) |
| 630 | SYMBOL_VALUE_ADDRESS (msym) += ANOFFSET (delta, SYMBOL_SECTION (msym)); |
| 631 | } |
| 632 | /* Relocating different sections by different amounts may cause the symbols |
| 633 | to be out of order. */ |
| 634 | msymbols_sort (objfile); |
| 635 | |
| 636 | { |
| 637 | int i; |
| 638 | for (i = 0; i < objfile->num_sections; ++i) |
| 639 | (objfile->section_offsets)->offsets[i] = ANOFFSET (new_offsets, i); |
| 640 | } |
| 641 | |
| 642 | if (objfile->ei.entry_point != ~(CORE_ADDR) 0) |
| 643 | { |
| 644 | /* Relocate ei.entry_point with its section offset, use SECT_OFF_TEXT |
| 645 | only as a fallback. */ |
| 646 | struct obj_section *s; |
| 647 | s = find_pc_section (objfile->ei.entry_point); |
| 648 | if (s) |
| 649 | objfile->ei.entry_point += ANOFFSET (delta, s->the_bfd_section->index); |
| 650 | else |
| 651 | objfile->ei.entry_point += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); |
| 652 | } |
| 653 | |
| 654 | { |
| 655 | struct obj_section *s; |
| 656 | bfd *abfd; |
| 657 | |
| 658 | abfd = objfile->obfd; |
| 659 | |
| 660 | ALL_OBJFILE_OSECTIONS (objfile, s) |
| 661 | { |
| 662 | int idx = s->the_bfd_section->index; |
| 663 | |
| 664 | s->addr += ANOFFSET (delta, idx); |
| 665 | s->endaddr += ANOFFSET (delta, idx); |
| 666 | } |
| 667 | } |
| 668 | |
| 669 | /* Relocate breakpoints as necessary, after things are relocated. */ |
| 670 | breakpoint_re_set (); |
| 671 | } |
| 672 | \f |
| 673 | /* Many places in gdb want to test just to see if we have any partial |
| 674 | symbols available. This function returns zero if none are currently |
| 675 | available, nonzero otherwise. */ |
| 676 | |
| 677 | int |
| 678 | have_partial_symbols (void) |
| 679 | { |
| 680 | struct objfile *ofp; |
| 681 | |
| 682 | ALL_OBJFILES (ofp) |
| 683 | { |
| 684 | if (ofp->psymtabs != NULL) |
| 685 | { |
| 686 | return 1; |
| 687 | } |
| 688 | } |
| 689 | return 0; |
| 690 | } |
| 691 | |
| 692 | /* Many places in gdb want to test just to see if we have any full |
| 693 | symbols available. This function returns zero if none are currently |
| 694 | available, nonzero otherwise. */ |
| 695 | |
| 696 | int |
| 697 | have_full_symbols (void) |
| 698 | { |
| 699 | struct objfile *ofp; |
| 700 | |
| 701 | ALL_OBJFILES (ofp) |
| 702 | { |
| 703 | if (ofp->symtabs != NULL) |
| 704 | { |
| 705 | return 1; |
| 706 | } |
| 707 | } |
| 708 | return 0; |
| 709 | } |
| 710 | |
| 711 | |
| 712 | /* This operations deletes all objfile entries that represent solibs that |
| 713 | weren't explicitly loaded by the user, via e.g., the add-symbol-file |
| 714 | command. |
| 715 | */ |
| 716 | void |
| 717 | objfile_purge_solibs (void) |
| 718 | { |
| 719 | struct objfile *objf; |
| 720 | struct objfile *temp; |
| 721 | |
| 722 | ALL_OBJFILES_SAFE (objf, temp) |
| 723 | { |
| 724 | /* We assume that the solib package has been purged already, or will |
| 725 | be soon. |
| 726 | */ |
| 727 | if (!(objf->flags & OBJF_USERLOADED) && (objf->flags & OBJF_SHARED)) |
| 728 | free_objfile (objf); |
| 729 | } |
| 730 | } |
| 731 | |
| 732 | |
| 733 | /* Many places in gdb want to test just to see if we have any minimal |
| 734 | symbols available. This function returns zero if none are currently |
| 735 | available, nonzero otherwise. */ |
| 736 | |
| 737 | int |
| 738 | have_minimal_symbols (void) |
| 739 | { |
| 740 | struct objfile *ofp; |
| 741 | |
| 742 | ALL_OBJFILES (ofp) |
| 743 | { |
| 744 | if (ofp->minimal_symbol_count > 0) |
| 745 | { |
| 746 | return 1; |
| 747 | } |
| 748 | } |
| 749 | return 0; |
| 750 | } |
| 751 | |
| 752 | /* Returns a section whose range includes PC and SECTION, or NULL if |
| 753 | none found. Note the distinction between the return type, struct |
| 754 | obj_section (which is defined in gdb), and the input type "struct |
| 755 | bfd_section" (which is a bfd-defined data type). The obj_section |
| 756 | contains a pointer to the "struct bfd_section". */ |
| 757 | |
| 758 | struct obj_section * |
| 759 | find_pc_sect_section (CORE_ADDR pc, struct bfd_section *section) |
| 760 | { |
| 761 | struct obj_section *s; |
| 762 | struct objfile *objfile; |
| 763 | |
| 764 | ALL_OBJSECTIONS (objfile, s) |
| 765 | if ((section == 0 || section == s->the_bfd_section) && |
| 766 | s->addr <= pc && pc < s->endaddr) |
| 767 | return (s); |
| 768 | |
| 769 | return (NULL); |
| 770 | } |
| 771 | |
| 772 | /* Returns a section whose range includes PC or NULL if none found. |
| 773 | Backward compatibility, no section. */ |
| 774 | |
| 775 | struct obj_section * |
| 776 | find_pc_section (CORE_ADDR pc) |
| 777 | { |
| 778 | return find_pc_sect_section (pc, find_pc_mapped_section (pc)); |
| 779 | } |
| 780 | |
| 781 | |
| 782 | /* In SVR4, we recognize a trampoline by it's section name. |
| 783 | That is, if the pc is in a section named ".plt" then we are in |
| 784 | a trampoline. */ |
| 785 | |
| 786 | int |
| 787 | in_plt_section (CORE_ADDR pc, char *name) |
| 788 | { |
| 789 | struct obj_section *s; |
| 790 | int retval = 0; |
| 791 | |
| 792 | s = find_pc_section (pc); |
| 793 | |
| 794 | retval = (s != NULL |
| 795 | && s->the_bfd_section->name != NULL |
| 796 | && strcmp (s->the_bfd_section->name, ".plt") == 0); |
| 797 | return (retval); |
| 798 | } |
| 799 | \f |
| 800 | |
| 801 | /* Keep a registry of per-objfile data-pointers required by other GDB |
| 802 | modules. */ |
| 803 | |
| 804 | struct objfile_data |
| 805 | { |
| 806 | unsigned index; |
| 807 | }; |
| 808 | |
| 809 | struct objfile_data_registration |
| 810 | { |
| 811 | struct objfile_data *data; |
| 812 | struct objfile_data_registration *next; |
| 813 | }; |
| 814 | |
| 815 | struct objfile_data_registry |
| 816 | { |
| 817 | struct objfile_data_registration *registrations; |
| 818 | unsigned num_registrations; |
| 819 | }; |
| 820 | |
| 821 | static struct objfile_data_registry objfile_data_registry = { NULL, 0 }; |
| 822 | |
| 823 | const struct objfile_data * |
| 824 | register_objfile_data (void) |
| 825 | { |
| 826 | struct objfile_data_registration **curr; |
| 827 | |
| 828 | /* Append new registration. */ |
| 829 | for (curr = &objfile_data_registry.registrations; |
| 830 | *curr != NULL; curr = &(*curr)->next); |
| 831 | |
| 832 | *curr = XMALLOC (struct objfile_data_registration); |
| 833 | (*curr)->next = NULL; |
| 834 | (*curr)->data = XMALLOC (struct objfile_data); |
| 835 | (*curr)->data->index = objfile_data_registry.num_registrations++; |
| 836 | |
| 837 | return (*curr)->data; |
| 838 | } |
| 839 | |
| 840 | static void |
| 841 | objfile_alloc_data (struct objfile *objfile) |
| 842 | { |
| 843 | gdb_assert (objfile->data == NULL); |
| 844 | objfile->num_data = objfile_data_registry.num_registrations; |
| 845 | objfile->data = XCALLOC (objfile->num_data, void *); |
| 846 | } |
| 847 | |
| 848 | static void |
| 849 | objfile_free_data (struct objfile *objfile) |
| 850 | { |
| 851 | gdb_assert (objfile->data != NULL); |
| 852 | xfree (objfile->data); |
| 853 | objfile->data = NULL; |
| 854 | } |
| 855 | |
| 856 | void |
| 857 | clear_objfile_data (struct objfile *objfile) |
| 858 | { |
| 859 | gdb_assert (objfile->data != NULL); |
| 860 | memset (objfile->data, 0, objfile->num_data * sizeof (void *)); |
| 861 | } |
| 862 | |
| 863 | void |
| 864 | set_objfile_data (struct objfile *objfile, const struct objfile_data *data, |
| 865 | void *value) |
| 866 | { |
| 867 | gdb_assert (data->index < objfile->num_data); |
| 868 | objfile->data[data->index] = value; |
| 869 | } |
| 870 | |
| 871 | void * |
| 872 | objfile_data (struct objfile *objfile, const struct objfile_data *data) |
| 873 | { |
| 874 | gdb_assert (data->index < objfile->num_data); |
| 875 | return objfile->data[data->index]; |
| 876 | } |