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