| 1 | /* Generic symbol file reading for the GNU debugger, GDB. |
| 2 | |
| 3 | Copyright (C) 1990-2015 Free Software Foundation, Inc. |
| 4 | |
| 5 | Contributed by Cygnus Support, using pieces from other GDB modules. |
| 6 | |
| 7 | This file is part of GDB. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 3 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include "arch-utils.h" |
| 24 | #include "bfdlink.h" |
| 25 | #include "symtab.h" |
| 26 | #include "gdbtypes.h" |
| 27 | #include "gdbcore.h" |
| 28 | #include "frame.h" |
| 29 | #include "target.h" |
| 30 | #include "value.h" |
| 31 | #include "symfile.h" |
| 32 | #include "objfiles.h" |
| 33 | #include "source.h" |
| 34 | #include "gdbcmd.h" |
| 35 | #include "breakpoint.h" |
| 36 | #include "language.h" |
| 37 | #include "complaints.h" |
| 38 | #include "demangle.h" |
| 39 | #include "inferior.h" |
| 40 | #include "regcache.h" |
| 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 "block.h" |
| 49 | #include "observer.h" |
| 50 | #include "exec.h" |
| 51 | #include "parser-defs.h" |
| 52 | #include "varobj.h" |
| 53 | #include "elf-bfd.h" |
| 54 | #include "solib.h" |
| 55 | #include "remote.h" |
| 56 | #include "stack.h" |
| 57 | #include "gdb_bfd.h" |
| 58 | #include "cli/cli-utils.h" |
| 59 | |
| 60 | #include <sys/types.h> |
| 61 | #include <fcntl.h> |
| 62 | #include <sys/stat.h> |
| 63 | #include <ctype.h> |
| 64 | #include <time.h> |
| 65 | #include "gdb_sys_time.h" |
| 66 | |
| 67 | #include "psymtab.h" |
| 68 | |
| 69 | int (*deprecated_ui_load_progress_hook) (const char *section, |
| 70 | unsigned long num); |
| 71 | void (*deprecated_show_load_progress) (const char *section, |
| 72 | unsigned long section_sent, |
| 73 | unsigned long section_size, |
| 74 | unsigned long total_sent, |
| 75 | unsigned long total_size); |
| 76 | void (*deprecated_pre_add_symbol_hook) (const char *); |
| 77 | void (*deprecated_post_add_symbol_hook) (void); |
| 78 | |
| 79 | static void clear_symtab_users_cleanup (void *ignore); |
| 80 | |
| 81 | /* Global variables owned by this file. */ |
| 82 | int readnow_symbol_files; /* Read full symbols immediately. */ |
| 83 | |
| 84 | /* Functions this file defines. */ |
| 85 | |
| 86 | static void load_command (char *, int); |
| 87 | |
| 88 | static void symbol_file_add_main_1 (const char *args, int from_tty, int flags); |
| 89 | |
| 90 | static void add_symbol_file_command (char *, int); |
| 91 | |
| 92 | static const struct sym_fns *find_sym_fns (bfd *); |
| 93 | |
| 94 | static void decrement_reading_symtab (void *); |
| 95 | |
| 96 | static void overlay_invalidate_all (void); |
| 97 | |
| 98 | static void overlay_auto_command (char *, int); |
| 99 | |
| 100 | static void overlay_manual_command (char *, int); |
| 101 | |
| 102 | static void overlay_off_command (char *, int); |
| 103 | |
| 104 | static void overlay_load_command (char *, int); |
| 105 | |
| 106 | static void overlay_command (char *, int); |
| 107 | |
| 108 | static void simple_free_overlay_table (void); |
| 109 | |
| 110 | static void read_target_long_array (CORE_ADDR, unsigned int *, int, int, |
| 111 | enum bfd_endian); |
| 112 | |
| 113 | static int simple_read_overlay_table (void); |
| 114 | |
| 115 | static int simple_overlay_update_1 (struct obj_section *); |
| 116 | |
| 117 | static void add_filename_language (char *ext, enum language lang); |
| 118 | |
| 119 | static void info_ext_lang_command (char *args, int from_tty); |
| 120 | |
| 121 | static void init_filename_language_table (void); |
| 122 | |
| 123 | static void symfile_find_segment_sections (struct objfile *objfile); |
| 124 | |
| 125 | void _initialize_symfile (void); |
| 126 | |
| 127 | /* List of all available sym_fns. On gdb startup, each object file reader |
| 128 | calls add_symtab_fns() to register information on each format it is |
| 129 | prepared to read. */ |
| 130 | |
| 131 | typedef struct |
| 132 | { |
| 133 | /* BFD flavour that we handle. */ |
| 134 | enum bfd_flavour sym_flavour; |
| 135 | |
| 136 | /* The "vtable" of symbol functions. */ |
| 137 | const struct sym_fns *sym_fns; |
| 138 | } registered_sym_fns; |
| 139 | |
| 140 | DEF_VEC_O (registered_sym_fns); |
| 141 | |
| 142 | static VEC (registered_sym_fns) *symtab_fns = NULL; |
| 143 | |
| 144 | /* Values for "set print symbol-loading". */ |
| 145 | |
| 146 | const char print_symbol_loading_off[] = "off"; |
| 147 | const char print_symbol_loading_brief[] = "brief"; |
| 148 | const char print_symbol_loading_full[] = "full"; |
| 149 | static const char *print_symbol_loading_enums[] = |
| 150 | { |
| 151 | print_symbol_loading_off, |
| 152 | print_symbol_loading_brief, |
| 153 | print_symbol_loading_full, |
| 154 | NULL |
| 155 | }; |
| 156 | static const char *print_symbol_loading = print_symbol_loading_full; |
| 157 | |
| 158 | /* If non-zero, shared library symbols will be added automatically |
| 159 | when the inferior is created, new libraries are loaded, or when |
| 160 | attaching to the inferior. This is almost always what users will |
| 161 | want to have happen; but for very large programs, the startup time |
| 162 | will be excessive, and so if this is a problem, the user can clear |
| 163 | this flag and then add the shared library symbols as needed. Note |
| 164 | that there is a potential for confusion, since if the shared |
| 165 | library symbols are not loaded, commands like "info fun" will *not* |
| 166 | report all the functions that are actually present. */ |
| 167 | |
| 168 | int auto_solib_add = 1; |
| 169 | \f |
| 170 | |
| 171 | /* Return non-zero if symbol-loading messages should be printed. |
| 172 | FROM_TTY is the standard from_tty argument to gdb commands. |
| 173 | If EXEC is non-zero the messages are for the executable. |
| 174 | Otherwise, messages are for shared libraries. |
| 175 | If FULL is non-zero then the caller is printing a detailed message. |
| 176 | E.g., the message includes the shared library name. |
| 177 | Otherwise, the caller is printing a brief "summary" message. */ |
| 178 | |
| 179 | int |
| 180 | print_symbol_loading_p (int from_tty, int exec, int full) |
| 181 | { |
| 182 | if (!from_tty && !info_verbose) |
| 183 | return 0; |
| 184 | |
| 185 | if (exec) |
| 186 | { |
| 187 | /* We don't check FULL for executables, there are few such |
| 188 | messages, therefore brief == full. */ |
| 189 | return print_symbol_loading != print_symbol_loading_off; |
| 190 | } |
| 191 | if (full) |
| 192 | return print_symbol_loading == print_symbol_loading_full; |
| 193 | return print_symbol_loading == print_symbol_loading_brief; |
| 194 | } |
| 195 | |
| 196 | /* True if we are reading a symbol table. */ |
| 197 | |
| 198 | int currently_reading_symtab = 0; |
| 199 | |
| 200 | static void |
| 201 | decrement_reading_symtab (void *dummy) |
| 202 | { |
| 203 | currently_reading_symtab--; |
| 204 | gdb_assert (currently_reading_symtab >= 0); |
| 205 | } |
| 206 | |
| 207 | /* Increment currently_reading_symtab and return a cleanup that can be |
| 208 | used to decrement it. */ |
| 209 | |
| 210 | struct cleanup * |
| 211 | increment_reading_symtab (void) |
| 212 | { |
| 213 | ++currently_reading_symtab; |
| 214 | gdb_assert (currently_reading_symtab > 0); |
| 215 | return make_cleanup (decrement_reading_symtab, NULL); |
| 216 | } |
| 217 | |
| 218 | /* Remember the lowest-addressed loadable section we've seen. |
| 219 | This function is called via bfd_map_over_sections. |
| 220 | |
| 221 | In case of equal vmas, the section with the largest size becomes the |
| 222 | lowest-addressed loadable section. |
| 223 | |
| 224 | If the vmas and sizes are equal, the last section is considered the |
| 225 | lowest-addressed loadable section. */ |
| 226 | |
| 227 | void |
| 228 | find_lowest_section (bfd *abfd, asection *sect, void *obj) |
| 229 | { |
| 230 | asection **lowest = (asection **) obj; |
| 231 | |
| 232 | if (0 == (bfd_get_section_flags (abfd, sect) & (SEC_ALLOC | SEC_LOAD))) |
| 233 | return; |
| 234 | if (!*lowest) |
| 235 | *lowest = sect; /* First loadable section */ |
| 236 | else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect)) |
| 237 | *lowest = sect; /* A lower loadable section */ |
| 238 | else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect) |
| 239 | && (bfd_section_size (abfd, (*lowest)) |
| 240 | <= bfd_section_size (abfd, sect))) |
| 241 | *lowest = sect; |
| 242 | } |
| 243 | |
| 244 | /* Create a new section_addr_info, with room for NUM_SECTIONS. The |
| 245 | new object's 'num_sections' field is set to 0; it must be updated |
| 246 | by the caller. */ |
| 247 | |
| 248 | struct section_addr_info * |
| 249 | alloc_section_addr_info (size_t num_sections) |
| 250 | { |
| 251 | struct section_addr_info *sap; |
| 252 | size_t size; |
| 253 | |
| 254 | size = (sizeof (struct section_addr_info) |
| 255 | + sizeof (struct other_sections) * (num_sections - 1)); |
| 256 | sap = (struct section_addr_info *) xmalloc (size); |
| 257 | memset (sap, 0, size); |
| 258 | |
| 259 | return sap; |
| 260 | } |
| 261 | |
| 262 | /* Build (allocate and populate) a section_addr_info struct from |
| 263 | an existing section table. */ |
| 264 | |
| 265 | extern struct section_addr_info * |
| 266 | build_section_addr_info_from_section_table (const struct target_section *start, |
| 267 | const struct target_section *end) |
| 268 | { |
| 269 | struct section_addr_info *sap; |
| 270 | const struct target_section *stp; |
| 271 | int oidx; |
| 272 | |
| 273 | sap = alloc_section_addr_info (end - start); |
| 274 | |
| 275 | for (stp = start, oidx = 0; stp != end; stp++) |
| 276 | { |
| 277 | struct bfd_section *asect = stp->the_bfd_section; |
| 278 | bfd *abfd = asect->owner; |
| 279 | |
| 280 | if (bfd_get_section_flags (abfd, asect) & (SEC_ALLOC | SEC_LOAD) |
| 281 | && oidx < end - start) |
| 282 | { |
| 283 | sap->other[oidx].addr = stp->addr; |
| 284 | sap->other[oidx].name = xstrdup (bfd_section_name (abfd, asect)); |
| 285 | sap->other[oidx].sectindex = gdb_bfd_section_index (abfd, asect); |
| 286 | oidx++; |
| 287 | } |
| 288 | } |
| 289 | |
| 290 | sap->num_sections = oidx; |
| 291 | |
| 292 | return sap; |
| 293 | } |
| 294 | |
| 295 | /* Create a section_addr_info from section offsets in ABFD. */ |
| 296 | |
| 297 | static struct section_addr_info * |
| 298 | build_section_addr_info_from_bfd (bfd *abfd) |
| 299 | { |
| 300 | struct section_addr_info *sap; |
| 301 | int i; |
| 302 | struct bfd_section *sec; |
| 303 | |
| 304 | sap = alloc_section_addr_info (bfd_count_sections (abfd)); |
| 305 | for (i = 0, sec = abfd->sections; sec != NULL; sec = sec->next) |
| 306 | if (bfd_get_section_flags (abfd, sec) & (SEC_ALLOC | SEC_LOAD)) |
| 307 | { |
| 308 | sap->other[i].addr = bfd_get_section_vma (abfd, sec); |
| 309 | sap->other[i].name = xstrdup (bfd_get_section_name (abfd, sec)); |
| 310 | sap->other[i].sectindex = gdb_bfd_section_index (abfd, sec); |
| 311 | i++; |
| 312 | } |
| 313 | |
| 314 | sap->num_sections = i; |
| 315 | |
| 316 | return sap; |
| 317 | } |
| 318 | |
| 319 | /* Create a section_addr_info from section offsets in OBJFILE. */ |
| 320 | |
| 321 | struct section_addr_info * |
| 322 | build_section_addr_info_from_objfile (const struct objfile *objfile) |
| 323 | { |
| 324 | struct section_addr_info *sap; |
| 325 | int i; |
| 326 | |
| 327 | /* Before reread_symbols gets rewritten it is not safe to call: |
| 328 | gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd)); |
| 329 | */ |
| 330 | sap = build_section_addr_info_from_bfd (objfile->obfd); |
| 331 | for (i = 0; i < sap->num_sections; i++) |
| 332 | { |
| 333 | int sectindex = sap->other[i].sectindex; |
| 334 | |
| 335 | sap->other[i].addr += objfile->section_offsets->offsets[sectindex]; |
| 336 | } |
| 337 | return sap; |
| 338 | } |
| 339 | |
| 340 | /* Free all memory allocated by build_section_addr_info_from_section_table. */ |
| 341 | |
| 342 | extern void |
| 343 | free_section_addr_info (struct section_addr_info *sap) |
| 344 | { |
| 345 | int idx; |
| 346 | |
| 347 | for (idx = 0; idx < sap->num_sections; idx++) |
| 348 | xfree (sap->other[idx].name); |
| 349 | xfree (sap); |
| 350 | } |
| 351 | |
| 352 | /* Initialize OBJFILE's sect_index_* members. */ |
| 353 | |
| 354 | static void |
| 355 | init_objfile_sect_indices (struct objfile *objfile) |
| 356 | { |
| 357 | asection *sect; |
| 358 | int i; |
| 359 | |
| 360 | sect = bfd_get_section_by_name (objfile->obfd, ".text"); |
| 361 | if (sect) |
| 362 | objfile->sect_index_text = sect->index; |
| 363 | |
| 364 | sect = bfd_get_section_by_name (objfile->obfd, ".data"); |
| 365 | if (sect) |
| 366 | objfile->sect_index_data = sect->index; |
| 367 | |
| 368 | sect = bfd_get_section_by_name (objfile->obfd, ".bss"); |
| 369 | if (sect) |
| 370 | objfile->sect_index_bss = sect->index; |
| 371 | |
| 372 | sect = bfd_get_section_by_name (objfile->obfd, ".rodata"); |
| 373 | if (sect) |
| 374 | objfile->sect_index_rodata = sect->index; |
| 375 | |
| 376 | /* This is where things get really weird... We MUST have valid |
| 377 | indices for the various sect_index_* members or gdb will abort. |
| 378 | So if for example, there is no ".text" section, we have to |
| 379 | accomodate that. First, check for a file with the standard |
| 380 | one or two segments. */ |
| 381 | |
| 382 | symfile_find_segment_sections (objfile); |
| 383 | |
| 384 | /* Except when explicitly adding symbol files at some address, |
| 385 | section_offsets contains nothing but zeros, so it doesn't matter |
| 386 | which slot in section_offsets the individual sect_index_* members |
| 387 | index into. So if they are all zero, it is safe to just point |
| 388 | all the currently uninitialized indices to the first slot. But |
| 389 | beware: if this is the main executable, it may be relocated |
| 390 | later, e.g. by the remote qOffsets packet, and then this will |
| 391 | be wrong! That's why we try segments first. */ |
| 392 | |
| 393 | for (i = 0; i < objfile->num_sections; i++) |
| 394 | { |
| 395 | if (ANOFFSET (objfile->section_offsets, i) != 0) |
| 396 | { |
| 397 | break; |
| 398 | } |
| 399 | } |
| 400 | if (i == objfile->num_sections) |
| 401 | { |
| 402 | if (objfile->sect_index_text == -1) |
| 403 | objfile->sect_index_text = 0; |
| 404 | if (objfile->sect_index_data == -1) |
| 405 | objfile->sect_index_data = 0; |
| 406 | if (objfile->sect_index_bss == -1) |
| 407 | objfile->sect_index_bss = 0; |
| 408 | if (objfile->sect_index_rodata == -1) |
| 409 | objfile->sect_index_rodata = 0; |
| 410 | } |
| 411 | } |
| 412 | |
| 413 | /* The arguments to place_section. */ |
| 414 | |
| 415 | struct place_section_arg |
| 416 | { |
| 417 | struct section_offsets *offsets; |
| 418 | CORE_ADDR lowest; |
| 419 | }; |
| 420 | |
| 421 | /* Find a unique offset to use for loadable section SECT if |
| 422 | the user did not provide an offset. */ |
| 423 | |
| 424 | static void |
| 425 | place_section (bfd *abfd, asection *sect, void *obj) |
| 426 | { |
| 427 | struct place_section_arg *arg = obj; |
| 428 | CORE_ADDR *offsets = arg->offsets->offsets, start_addr; |
| 429 | int done; |
| 430 | ULONGEST align = ((ULONGEST) 1) << bfd_get_section_alignment (abfd, sect); |
| 431 | |
| 432 | /* We are only interested in allocated sections. */ |
| 433 | if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) |
| 434 | return; |
| 435 | |
| 436 | /* If the user specified an offset, honor it. */ |
| 437 | if (offsets[gdb_bfd_section_index (abfd, sect)] != 0) |
| 438 | return; |
| 439 | |
| 440 | /* Otherwise, let's try to find a place for the section. */ |
| 441 | start_addr = (arg->lowest + align - 1) & -align; |
| 442 | |
| 443 | do { |
| 444 | asection *cur_sec; |
| 445 | |
| 446 | done = 1; |
| 447 | |
| 448 | for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next) |
| 449 | { |
| 450 | int indx = cur_sec->index; |
| 451 | |
| 452 | /* We don't need to compare against ourself. */ |
| 453 | if (cur_sec == sect) |
| 454 | continue; |
| 455 | |
| 456 | /* We can only conflict with allocated sections. */ |
| 457 | if ((bfd_get_section_flags (abfd, cur_sec) & SEC_ALLOC) == 0) |
| 458 | continue; |
| 459 | |
| 460 | /* If the section offset is 0, either the section has not been placed |
| 461 | yet, or it was the lowest section placed (in which case LOWEST |
| 462 | will be past its end). */ |
| 463 | if (offsets[indx] == 0) |
| 464 | continue; |
| 465 | |
| 466 | /* If this section would overlap us, then we must move up. */ |
| 467 | if (start_addr + bfd_get_section_size (sect) > offsets[indx] |
| 468 | && start_addr < offsets[indx] + bfd_get_section_size (cur_sec)) |
| 469 | { |
| 470 | start_addr = offsets[indx] + bfd_get_section_size (cur_sec); |
| 471 | start_addr = (start_addr + align - 1) & -align; |
| 472 | done = 0; |
| 473 | break; |
| 474 | } |
| 475 | |
| 476 | /* Otherwise, we appear to be OK. So far. */ |
| 477 | } |
| 478 | } |
| 479 | while (!done); |
| 480 | |
| 481 | offsets[gdb_bfd_section_index (abfd, sect)] = start_addr; |
| 482 | arg->lowest = start_addr + bfd_get_section_size (sect); |
| 483 | } |
| 484 | |
| 485 | /* Store struct section_addr_info as prepared (made relative and with SECTINDEX |
| 486 | filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS |
| 487 | entries. */ |
| 488 | |
| 489 | void |
| 490 | relative_addr_info_to_section_offsets (struct section_offsets *section_offsets, |
| 491 | int num_sections, |
| 492 | const struct section_addr_info *addrs) |
| 493 | { |
| 494 | int i; |
| 495 | |
| 496 | memset (section_offsets, 0, SIZEOF_N_SECTION_OFFSETS (num_sections)); |
| 497 | |
| 498 | /* Now calculate offsets for section that were specified by the caller. */ |
| 499 | for (i = 0; i < addrs->num_sections; i++) |
| 500 | { |
| 501 | const struct other_sections *osp; |
| 502 | |
| 503 | osp = &addrs->other[i]; |
| 504 | if (osp->sectindex == -1) |
| 505 | continue; |
| 506 | |
| 507 | /* Record all sections in offsets. */ |
| 508 | /* The section_offsets in the objfile are here filled in using |
| 509 | the BFD index. */ |
| 510 | section_offsets->offsets[osp->sectindex] = osp->addr; |
| 511 | } |
| 512 | } |
| 513 | |
| 514 | /* Transform section name S for a name comparison. prelink can split section |
| 515 | `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly |
| 516 | prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address |
| 517 | of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss' |
| 518 | (`.sbss') section has invalid (increased) virtual address. */ |
| 519 | |
| 520 | static const char * |
| 521 | addr_section_name (const char *s) |
| 522 | { |
| 523 | if (strcmp (s, ".dynbss") == 0) |
| 524 | return ".bss"; |
| 525 | if (strcmp (s, ".sdynbss") == 0) |
| 526 | return ".sbss"; |
| 527 | |
| 528 | return s; |
| 529 | } |
| 530 | |
| 531 | /* qsort comparator for addrs_section_sort. Sort entries in ascending order by |
| 532 | their (name, sectindex) pair. sectindex makes the sort by name stable. */ |
| 533 | |
| 534 | static int |
| 535 | addrs_section_compar (const void *ap, const void *bp) |
| 536 | { |
| 537 | const struct other_sections *a = *((struct other_sections **) ap); |
| 538 | const struct other_sections *b = *((struct other_sections **) bp); |
| 539 | int retval; |
| 540 | |
| 541 | retval = strcmp (addr_section_name (a->name), addr_section_name (b->name)); |
| 542 | if (retval) |
| 543 | return retval; |
| 544 | |
| 545 | return a->sectindex - b->sectindex; |
| 546 | } |
| 547 | |
| 548 | /* Provide sorted array of pointers to sections of ADDRS. The array is |
| 549 | terminated by NULL. Caller is responsible to call xfree for it. */ |
| 550 | |
| 551 | static struct other_sections ** |
| 552 | addrs_section_sort (struct section_addr_info *addrs) |
| 553 | { |
| 554 | struct other_sections **array; |
| 555 | int i; |
| 556 | |
| 557 | /* `+ 1' for the NULL terminator. */ |
| 558 | array = XNEWVEC (struct other_sections *, addrs->num_sections + 1); |
| 559 | for (i = 0; i < addrs->num_sections; i++) |
| 560 | array[i] = &addrs->other[i]; |
| 561 | array[i] = NULL; |
| 562 | |
| 563 | qsort (array, i, sizeof (*array), addrs_section_compar); |
| 564 | |
| 565 | return array; |
| 566 | } |
| 567 | |
| 568 | /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in |
| 569 | also SECTINDEXes specific to ABFD there. This function can be used to |
| 570 | rebase ADDRS to start referencing different BFD than before. */ |
| 571 | |
| 572 | void |
| 573 | addr_info_make_relative (struct section_addr_info *addrs, bfd *abfd) |
| 574 | { |
| 575 | asection *lower_sect; |
| 576 | CORE_ADDR lower_offset; |
| 577 | int i; |
| 578 | struct cleanup *my_cleanup; |
| 579 | struct section_addr_info *abfd_addrs; |
| 580 | struct other_sections **addrs_sorted, **abfd_addrs_sorted; |
| 581 | struct other_sections **addrs_to_abfd_addrs; |
| 582 | |
| 583 | /* Find lowest loadable section to be used as starting point for |
| 584 | continguous sections. */ |
| 585 | lower_sect = NULL; |
| 586 | bfd_map_over_sections (abfd, find_lowest_section, &lower_sect); |
| 587 | if (lower_sect == NULL) |
| 588 | { |
| 589 | warning (_("no loadable sections found in added symbol-file %s"), |
| 590 | bfd_get_filename (abfd)); |
| 591 | lower_offset = 0; |
| 592 | } |
| 593 | else |
| 594 | lower_offset = bfd_section_vma (bfd_get_filename (abfd), lower_sect); |
| 595 | |
| 596 | /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections |
| 597 | in ABFD. Section names are not unique - there can be multiple sections of |
| 598 | the same name. Also the sections of the same name do not have to be |
| 599 | adjacent to each other. Some sections may be present only in one of the |
| 600 | files. Even sections present in both files do not have to be in the same |
| 601 | order. |
| 602 | |
| 603 | Use stable sort by name for the sections in both files. Then linearly |
| 604 | scan both lists matching as most of the entries as possible. */ |
| 605 | |
| 606 | addrs_sorted = addrs_section_sort (addrs); |
| 607 | my_cleanup = make_cleanup (xfree, addrs_sorted); |
| 608 | |
| 609 | abfd_addrs = build_section_addr_info_from_bfd (abfd); |
| 610 | make_cleanup_free_section_addr_info (abfd_addrs); |
| 611 | abfd_addrs_sorted = addrs_section_sort (abfd_addrs); |
| 612 | make_cleanup (xfree, abfd_addrs_sorted); |
| 613 | |
| 614 | /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and |
| 615 | ABFD_ADDRS_SORTED. */ |
| 616 | |
| 617 | addrs_to_abfd_addrs = XCNEWVEC (struct other_sections *, addrs->num_sections); |
| 618 | make_cleanup (xfree, addrs_to_abfd_addrs); |
| 619 | |
| 620 | while (*addrs_sorted) |
| 621 | { |
| 622 | const char *sect_name = addr_section_name ((*addrs_sorted)->name); |
| 623 | |
| 624 | while (*abfd_addrs_sorted |
| 625 | && strcmp (addr_section_name ((*abfd_addrs_sorted)->name), |
| 626 | sect_name) < 0) |
| 627 | abfd_addrs_sorted++; |
| 628 | |
| 629 | if (*abfd_addrs_sorted |
| 630 | && strcmp (addr_section_name ((*abfd_addrs_sorted)->name), |
| 631 | sect_name) == 0) |
| 632 | { |
| 633 | int index_in_addrs; |
| 634 | |
| 635 | /* Make the found item directly addressable from ADDRS. */ |
| 636 | index_in_addrs = *addrs_sorted - addrs->other; |
| 637 | gdb_assert (addrs_to_abfd_addrs[index_in_addrs] == NULL); |
| 638 | addrs_to_abfd_addrs[index_in_addrs] = *abfd_addrs_sorted; |
| 639 | |
| 640 | /* Never use the same ABFD entry twice. */ |
| 641 | abfd_addrs_sorted++; |
| 642 | } |
| 643 | |
| 644 | addrs_sorted++; |
| 645 | } |
| 646 | |
| 647 | /* Calculate offsets for the loadable sections. |
| 648 | FIXME! Sections must be in order of increasing loadable section |
| 649 | so that contiguous sections can use the lower-offset!!! |
| 650 | |
| 651 | Adjust offsets if the segments are not contiguous. |
| 652 | If the section is contiguous, its offset should be set to |
| 653 | the offset of the highest loadable section lower than it |
| 654 | (the loadable section directly below it in memory). |
| 655 | this_offset = lower_offset = lower_addr - lower_orig_addr */ |
| 656 | |
| 657 | for (i = 0; i < addrs->num_sections; i++) |
| 658 | { |
| 659 | struct other_sections *sect = addrs_to_abfd_addrs[i]; |
| 660 | |
| 661 | if (sect) |
| 662 | { |
| 663 | /* This is the index used by BFD. */ |
| 664 | addrs->other[i].sectindex = sect->sectindex; |
| 665 | |
| 666 | if (addrs->other[i].addr != 0) |
| 667 | { |
| 668 | addrs->other[i].addr -= sect->addr; |
| 669 | lower_offset = addrs->other[i].addr; |
| 670 | } |
| 671 | else |
| 672 | addrs->other[i].addr = lower_offset; |
| 673 | } |
| 674 | else |
| 675 | { |
| 676 | /* addr_section_name transformation is not used for SECT_NAME. */ |
| 677 | const char *sect_name = addrs->other[i].name; |
| 678 | |
| 679 | /* This section does not exist in ABFD, which is normally |
| 680 | unexpected and we want to issue a warning. |
| 681 | |
| 682 | However, the ELF prelinker does create a few sections which are |
| 683 | marked in the main executable as loadable (they are loaded in |
| 684 | memory from the DYNAMIC segment) and yet are not present in |
| 685 | separate debug info files. This is fine, and should not cause |
| 686 | a warning. Shared libraries contain just the section |
| 687 | ".gnu.liblist" but it is not marked as loadable there. There is |
| 688 | no other way to identify them than by their name as the sections |
| 689 | created by prelink have no special flags. |
| 690 | |
| 691 | For the sections `.bss' and `.sbss' see addr_section_name. */ |
| 692 | |
| 693 | if (!(strcmp (sect_name, ".gnu.liblist") == 0 |
| 694 | || strcmp (sect_name, ".gnu.conflict") == 0 |
| 695 | || (strcmp (sect_name, ".bss") == 0 |
| 696 | && i > 0 |
| 697 | && strcmp (addrs->other[i - 1].name, ".dynbss") == 0 |
| 698 | && addrs_to_abfd_addrs[i - 1] != NULL) |
| 699 | || (strcmp (sect_name, ".sbss") == 0 |
| 700 | && i > 0 |
| 701 | && strcmp (addrs->other[i - 1].name, ".sdynbss") == 0 |
| 702 | && addrs_to_abfd_addrs[i - 1] != NULL))) |
| 703 | warning (_("section %s not found in %s"), sect_name, |
| 704 | bfd_get_filename (abfd)); |
| 705 | |
| 706 | addrs->other[i].addr = 0; |
| 707 | addrs->other[i].sectindex = -1; |
| 708 | } |
| 709 | } |
| 710 | |
| 711 | do_cleanups (my_cleanup); |
| 712 | } |
| 713 | |
| 714 | /* Parse the user's idea of an offset for dynamic linking, into our idea |
| 715 | of how to represent it for fast symbol reading. This is the default |
| 716 | version of the sym_fns.sym_offsets function for symbol readers that |
| 717 | don't need to do anything special. It allocates a section_offsets table |
| 718 | for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */ |
| 719 | |
| 720 | void |
| 721 | default_symfile_offsets (struct objfile *objfile, |
| 722 | const struct section_addr_info *addrs) |
| 723 | { |
| 724 | objfile->num_sections = gdb_bfd_count_sections (objfile->obfd); |
| 725 | objfile->section_offsets = (struct section_offsets *) |
| 726 | obstack_alloc (&objfile->objfile_obstack, |
| 727 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); |
| 728 | relative_addr_info_to_section_offsets (objfile->section_offsets, |
| 729 | objfile->num_sections, addrs); |
| 730 | |
| 731 | /* For relocatable files, all loadable sections will start at zero. |
| 732 | The zero is meaningless, so try to pick arbitrary addresses such |
| 733 | that no loadable sections overlap. This algorithm is quadratic, |
| 734 | but the number of sections in a single object file is generally |
| 735 | small. */ |
| 736 | if ((bfd_get_file_flags (objfile->obfd) & (EXEC_P | DYNAMIC)) == 0) |
| 737 | { |
| 738 | struct place_section_arg arg; |
| 739 | bfd *abfd = objfile->obfd; |
| 740 | asection *cur_sec; |
| 741 | |
| 742 | for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next) |
| 743 | /* We do not expect this to happen; just skip this step if the |
| 744 | relocatable file has a section with an assigned VMA. */ |
| 745 | if (bfd_section_vma (abfd, cur_sec) != 0) |
| 746 | break; |
| 747 | |
| 748 | if (cur_sec == NULL) |
| 749 | { |
| 750 | CORE_ADDR *offsets = objfile->section_offsets->offsets; |
| 751 | |
| 752 | /* Pick non-overlapping offsets for sections the user did not |
| 753 | place explicitly. */ |
| 754 | arg.offsets = objfile->section_offsets; |
| 755 | arg.lowest = 0; |
| 756 | bfd_map_over_sections (objfile->obfd, place_section, &arg); |
| 757 | |
| 758 | /* Correctly filling in the section offsets is not quite |
| 759 | enough. Relocatable files have two properties that |
| 760 | (most) shared objects do not: |
| 761 | |
| 762 | - Their debug information will contain relocations. Some |
| 763 | shared libraries do also, but many do not, so this can not |
| 764 | be assumed. |
| 765 | |
| 766 | - If there are multiple code sections they will be loaded |
| 767 | at different relative addresses in memory than they are |
| 768 | in the objfile, since all sections in the file will start |
| 769 | at address zero. |
| 770 | |
| 771 | Because GDB has very limited ability to map from an |
| 772 | address in debug info to the correct code section, |
| 773 | it relies on adding SECT_OFF_TEXT to things which might be |
| 774 | code. If we clear all the section offsets, and set the |
| 775 | section VMAs instead, then symfile_relocate_debug_section |
| 776 | will return meaningful debug information pointing at the |
| 777 | correct sections. |
| 778 | |
| 779 | GDB has too many different data structures for section |
| 780 | addresses - a bfd, objfile, and so_list all have section |
| 781 | tables, as does exec_ops. Some of these could probably |
| 782 | be eliminated. */ |
| 783 | |
| 784 | for (cur_sec = abfd->sections; cur_sec != NULL; |
| 785 | cur_sec = cur_sec->next) |
| 786 | { |
| 787 | if ((bfd_get_section_flags (abfd, cur_sec) & SEC_ALLOC) == 0) |
| 788 | continue; |
| 789 | |
| 790 | bfd_set_section_vma (abfd, cur_sec, offsets[cur_sec->index]); |
| 791 | exec_set_section_address (bfd_get_filename (abfd), |
| 792 | cur_sec->index, |
| 793 | offsets[cur_sec->index]); |
| 794 | offsets[cur_sec->index] = 0; |
| 795 | } |
| 796 | } |
| 797 | } |
| 798 | |
| 799 | /* Remember the bfd indexes for the .text, .data, .bss and |
| 800 | .rodata sections. */ |
| 801 | init_objfile_sect_indices (objfile); |
| 802 | } |
| 803 | |
| 804 | /* Divide the file into segments, which are individual relocatable units. |
| 805 | This is the default version of the sym_fns.sym_segments function for |
| 806 | symbol readers that do not have an explicit representation of segments. |
| 807 | It assumes that object files do not have segments, and fully linked |
| 808 | files have a single segment. */ |
| 809 | |
| 810 | struct symfile_segment_data * |
| 811 | default_symfile_segments (bfd *abfd) |
| 812 | { |
| 813 | int num_sections, i; |
| 814 | asection *sect; |
| 815 | struct symfile_segment_data *data; |
| 816 | CORE_ADDR low, high; |
| 817 | |
| 818 | /* Relocatable files contain enough information to position each |
| 819 | loadable section independently; they should not be relocated |
| 820 | in segments. */ |
| 821 | if ((bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) == 0) |
| 822 | return NULL; |
| 823 | |
| 824 | /* Make sure there is at least one loadable section in the file. */ |
| 825 | for (sect = abfd->sections; sect != NULL; sect = sect->next) |
| 826 | { |
| 827 | if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) |
| 828 | continue; |
| 829 | |
| 830 | break; |
| 831 | } |
| 832 | if (sect == NULL) |
| 833 | return NULL; |
| 834 | |
| 835 | low = bfd_get_section_vma (abfd, sect); |
| 836 | high = low + bfd_get_section_size (sect); |
| 837 | |
| 838 | data = XCNEW (struct symfile_segment_data); |
| 839 | data->num_segments = 1; |
| 840 | data->segment_bases = XCNEW (CORE_ADDR); |
| 841 | data->segment_sizes = XCNEW (CORE_ADDR); |
| 842 | |
| 843 | num_sections = bfd_count_sections (abfd); |
| 844 | data->segment_info = XCNEWVEC (int, num_sections); |
| 845 | |
| 846 | for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next) |
| 847 | { |
| 848 | CORE_ADDR vma; |
| 849 | |
| 850 | if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) |
| 851 | continue; |
| 852 | |
| 853 | vma = bfd_get_section_vma (abfd, sect); |
| 854 | if (vma < low) |
| 855 | low = vma; |
| 856 | if (vma + bfd_get_section_size (sect) > high) |
| 857 | high = vma + bfd_get_section_size (sect); |
| 858 | |
| 859 | data->segment_info[i] = 1; |
| 860 | } |
| 861 | |
| 862 | data->segment_bases[0] = low; |
| 863 | data->segment_sizes[0] = high - low; |
| 864 | |
| 865 | return data; |
| 866 | } |
| 867 | |
| 868 | /* This is a convenience function to call sym_read for OBJFILE and |
| 869 | possibly force the partial symbols to be read. */ |
| 870 | |
| 871 | static void |
| 872 | read_symbols (struct objfile *objfile, int add_flags) |
| 873 | { |
| 874 | (*objfile->sf->sym_read) (objfile, add_flags); |
| 875 | objfile->per_bfd->minsyms_read = 1; |
| 876 | |
| 877 | /* find_separate_debug_file_in_section should be called only if there is |
| 878 | single binary with no existing separate debug info file. */ |
| 879 | if (!objfile_has_partial_symbols (objfile) |
| 880 | && objfile->separate_debug_objfile == NULL |
| 881 | && objfile->separate_debug_objfile_backlink == NULL) |
| 882 | { |
| 883 | bfd *abfd = find_separate_debug_file_in_section (objfile); |
| 884 | struct cleanup *cleanup = make_cleanup_bfd_unref (abfd); |
| 885 | |
| 886 | if (abfd != NULL) |
| 887 | { |
| 888 | /* find_separate_debug_file_in_section uses the same filename for the |
| 889 | virtual section-as-bfd like the bfd filename containing the |
| 890 | section. Therefore use also non-canonical name form for the same |
| 891 | file containing the section. */ |
| 892 | symbol_file_add_separate (abfd, objfile->original_name, add_flags, |
| 893 | objfile); |
| 894 | } |
| 895 | |
| 896 | do_cleanups (cleanup); |
| 897 | } |
| 898 | if ((add_flags & SYMFILE_NO_READ) == 0) |
| 899 | require_partial_symbols (objfile, 0); |
| 900 | } |
| 901 | |
| 902 | /* Initialize entry point information for this objfile. */ |
| 903 | |
| 904 | static void |
| 905 | init_entry_point_info (struct objfile *objfile) |
| 906 | { |
| 907 | struct entry_info *ei = &objfile->per_bfd->ei; |
| 908 | |
| 909 | if (ei->initialized) |
| 910 | return; |
| 911 | ei->initialized = 1; |
| 912 | |
| 913 | /* Save startup file's range of PC addresses to help blockframe.c |
| 914 | decide where the bottom of the stack is. */ |
| 915 | |
| 916 | if (bfd_get_file_flags (objfile->obfd) & EXEC_P) |
| 917 | { |
| 918 | /* Executable file -- record its entry point so we'll recognize |
| 919 | the startup file because it contains the entry point. */ |
| 920 | ei->entry_point = bfd_get_start_address (objfile->obfd); |
| 921 | ei->entry_point_p = 1; |
| 922 | } |
| 923 | else if (bfd_get_file_flags (objfile->obfd) & DYNAMIC |
| 924 | && bfd_get_start_address (objfile->obfd) != 0) |
| 925 | { |
| 926 | /* Some shared libraries may have entry points set and be |
| 927 | runnable. There's no clear way to indicate this, so just check |
| 928 | for values other than zero. */ |
| 929 | ei->entry_point = bfd_get_start_address (objfile->obfd); |
| 930 | ei->entry_point_p = 1; |
| 931 | } |
| 932 | else |
| 933 | { |
| 934 | /* Examination of non-executable.o files. Short-circuit this stuff. */ |
| 935 | ei->entry_point_p = 0; |
| 936 | } |
| 937 | |
| 938 | if (ei->entry_point_p) |
| 939 | { |
| 940 | struct obj_section *osect; |
| 941 | CORE_ADDR entry_point = ei->entry_point; |
| 942 | int found; |
| 943 | |
| 944 | /* Make certain that the address points at real code, and not a |
| 945 | function descriptor. */ |
| 946 | entry_point |
| 947 | = gdbarch_convert_from_func_ptr_addr (get_objfile_arch (objfile), |
| 948 | entry_point, |
| 949 | ¤t_target); |
| 950 | |
| 951 | /* Remove any ISA markers, so that this matches entries in the |
| 952 | symbol table. */ |
| 953 | ei->entry_point |
| 954 | = gdbarch_addr_bits_remove (get_objfile_arch (objfile), entry_point); |
| 955 | |
| 956 | found = 0; |
| 957 | ALL_OBJFILE_OSECTIONS (objfile, osect) |
| 958 | { |
| 959 | struct bfd_section *sect = osect->the_bfd_section; |
| 960 | |
| 961 | if (entry_point >= bfd_get_section_vma (objfile->obfd, sect) |
| 962 | && entry_point < (bfd_get_section_vma (objfile->obfd, sect) |
| 963 | + bfd_get_section_size (sect))) |
| 964 | { |
| 965 | ei->the_bfd_section_index |
| 966 | = gdb_bfd_section_index (objfile->obfd, sect); |
| 967 | found = 1; |
| 968 | break; |
| 969 | } |
| 970 | } |
| 971 | |
| 972 | if (!found) |
| 973 | ei->the_bfd_section_index = SECT_OFF_TEXT (objfile); |
| 974 | } |
| 975 | } |
| 976 | |
| 977 | /* Process a symbol file, as either the main file or as a dynamically |
| 978 | loaded file. |
| 979 | |
| 980 | This function does not set the OBJFILE's entry-point info. |
| 981 | |
| 982 | OBJFILE is where the symbols are to be read from. |
| 983 | |
| 984 | ADDRS is the list of section load addresses. If the user has given |
| 985 | an 'add-symbol-file' command, then this is the list of offsets and |
| 986 | addresses he or she provided as arguments to the command; or, if |
| 987 | we're handling a shared library, these are the actual addresses the |
| 988 | sections are loaded at, according to the inferior's dynamic linker |
| 989 | (as gleaned by GDB's shared library code). We convert each address |
| 990 | into an offset from the section VMA's as it appears in the object |
| 991 | file, and then call the file's sym_offsets function to convert this |
| 992 | into a format-specific offset table --- a `struct section_offsets'. |
| 993 | |
| 994 | ADD_FLAGS encodes verbosity level, whether this is main symbol or |
| 995 | an extra symbol file such as dynamically loaded code, and wether |
| 996 | breakpoint reset should be deferred. */ |
| 997 | |
| 998 | static void |
| 999 | syms_from_objfile_1 (struct objfile *objfile, |
| 1000 | struct section_addr_info *addrs, |
| 1001 | int add_flags) |
| 1002 | { |
| 1003 | struct section_addr_info *local_addr = NULL; |
| 1004 | struct cleanup *old_chain; |
| 1005 | const int mainline = add_flags & SYMFILE_MAINLINE; |
| 1006 | |
| 1007 | objfile_set_sym_fns (objfile, find_sym_fns (objfile->obfd)); |
| 1008 | |
| 1009 | if (objfile->sf == NULL) |
| 1010 | { |
| 1011 | /* No symbols to load, but we still need to make sure |
| 1012 | that the section_offsets table is allocated. */ |
| 1013 | int num_sections = gdb_bfd_count_sections (objfile->obfd); |
| 1014 | size_t size = SIZEOF_N_SECTION_OFFSETS (num_sections); |
| 1015 | |
| 1016 | objfile->num_sections = num_sections; |
| 1017 | objfile->section_offsets |
| 1018 | = obstack_alloc (&objfile->objfile_obstack, size); |
| 1019 | memset (objfile->section_offsets, 0, size); |
| 1020 | return; |
| 1021 | } |
| 1022 | |
| 1023 | /* Make sure that partially constructed symbol tables will be cleaned up |
| 1024 | if an error occurs during symbol reading. */ |
| 1025 | old_chain = make_cleanup_free_objfile (objfile); |
| 1026 | |
| 1027 | /* If ADDRS is NULL, put together a dummy address list. |
| 1028 | We now establish the convention that an addr of zero means |
| 1029 | no load address was specified. */ |
| 1030 | if (! addrs) |
| 1031 | { |
| 1032 | local_addr = alloc_section_addr_info (1); |
| 1033 | make_cleanup (xfree, local_addr); |
| 1034 | addrs = local_addr; |
| 1035 | } |
| 1036 | |
| 1037 | if (mainline) |
| 1038 | { |
| 1039 | /* We will modify the main symbol table, make sure that all its users |
| 1040 | will be cleaned up if an error occurs during symbol reading. */ |
| 1041 | make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/); |
| 1042 | |
| 1043 | /* Since no error yet, throw away the old symbol table. */ |
| 1044 | |
| 1045 | if (symfile_objfile != NULL) |
| 1046 | { |
| 1047 | free_objfile (symfile_objfile); |
| 1048 | gdb_assert (symfile_objfile == NULL); |
| 1049 | } |
| 1050 | |
| 1051 | /* Currently we keep symbols from the add-symbol-file command. |
| 1052 | If the user wants to get rid of them, they should do "symbol-file" |
| 1053 | without arguments first. Not sure this is the best behavior |
| 1054 | (PR 2207). */ |
| 1055 | |
| 1056 | (*objfile->sf->sym_new_init) (objfile); |
| 1057 | } |
| 1058 | |
| 1059 | /* Convert addr into an offset rather than an absolute address. |
| 1060 | We find the lowest address of a loaded segment in the objfile, |
| 1061 | and assume that <addr> is where that got loaded. |
| 1062 | |
| 1063 | We no longer warn if the lowest section is not a text segment (as |
| 1064 | happens for the PA64 port. */ |
| 1065 | if (addrs->num_sections > 0) |
| 1066 | addr_info_make_relative (addrs, objfile->obfd); |
| 1067 | |
| 1068 | /* Initialize symbol reading routines for this objfile, allow complaints to |
| 1069 | appear for this new file, and record how verbose to be, then do the |
| 1070 | initial symbol reading for this file. */ |
| 1071 | |
| 1072 | (*objfile->sf->sym_init) (objfile); |
| 1073 | clear_complaints (&symfile_complaints, 1, add_flags & SYMFILE_VERBOSE); |
| 1074 | |
| 1075 | (*objfile->sf->sym_offsets) (objfile, addrs); |
| 1076 | |
| 1077 | read_symbols (objfile, add_flags); |
| 1078 | |
| 1079 | /* Discard cleanups as symbol reading was successful. */ |
| 1080 | |
| 1081 | discard_cleanups (old_chain); |
| 1082 | xfree (local_addr); |
| 1083 | } |
| 1084 | |
| 1085 | /* Same as syms_from_objfile_1, but also initializes the objfile |
| 1086 | entry-point info. */ |
| 1087 | |
| 1088 | static void |
| 1089 | syms_from_objfile (struct objfile *objfile, |
| 1090 | struct section_addr_info *addrs, |
| 1091 | int add_flags) |
| 1092 | { |
| 1093 | syms_from_objfile_1 (objfile, addrs, add_flags); |
| 1094 | init_entry_point_info (objfile); |
| 1095 | } |
| 1096 | |
| 1097 | /* Perform required actions after either reading in the initial |
| 1098 | symbols for a new objfile, or mapping in the symbols from a reusable |
| 1099 | objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */ |
| 1100 | |
| 1101 | static void |
| 1102 | finish_new_objfile (struct objfile *objfile, int add_flags) |
| 1103 | { |
| 1104 | /* If this is the main symbol file we have to clean up all users of the |
| 1105 | old main symbol file. Otherwise it is sufficient to fixup all the |
| 1106 | breakpoints that may have been redefined by this symbol file. */ |
| 1107 | if (add_flags & SYMFILE_MAINLINE) |
| 1108 | { |
| 1109 | /* OK, make it the "real" symbol file. */ |
| 1110 | symfile_objfile = objfile; |
| 1111 | |
| 1112 | clear_symtab_users (add_flags); |
| 1113 | } |
| 1114 | else if ((add_flags & SYMFILE_DEFER_BP_RESET) == 0) |
| 1115 | { |
| 1116 | breakpoint_re_set (); |
| 1117 | } |
| 1118 | |
| 1119 | /* We're done reading the symbol file; finish off complaints. */ |
| 1120 | clear_complaints (&symfile_complaints, 0, add_flags & SYMFILE_VERBOSE); |
| 1121 | } |
| 1122 | |
| 1123 | /* Process a symbol file, as either the main file or as a dynamically |
| 1124 | loaded file. |
| 1125 | |
| 1126 | ABFD is a BFD already open on the file, as from symfile_bfd_open. |
| 1127 | A new reference is acquired by this function. |
| 1128 | |
| 1129 | For NAME description see allocate_objfile's definition. |
| 1130 | |
| 1131 | ADD_FLAGS encodes verbosity, whether this is main symbol file or |
| 1132 | extra, such as dynamically loaded code, and what to do with breakpoins. |
| 1133 | |
| 1134 | ADDRS is as described for syms_from_objfile_1, above. |
| 1135 | ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS. |
| 1136 | |
| 1137 | PARENT is the original objfile if ABFD is a separate debug info file. |
| 1138 | Otherwise PARENT is NULL. |
| 1139 | |
| 1140 | Upon success, returns a pointer to the objfile that was added. |
| 1141 | Upon failure, jumps back to command level (never returns). */ |
| 1142 | |
| 1143 | static struct objfile * |
| 1144 | symbol_file_add_with_addrs (bfd *abfd, const char *name, int add_flags, |
| 1145 | struct section_addr_info *addrs, |
| 1146 | int flags, struct objfile *parent) |
| 1147 | { |
| 1148 | struct objfile *objfile; |
| 1149 | const int from_tty = add_flags & SYMFILE_VERBOSE; |
| 1150 | const int mainline = add_flags & SYMFILE_MAINLINE; |
| 1151 | const int should_print = (print_symbol_loading_p (from_tty, mainline, 1) |
| 1152 | && (readnow_symbol_files |
| 1153 | || (add_flags & SYMFILE_NO_READ) == 0)); |
| 1154 | |
| 1155 | if (readnow_symbol_files) |
| 1156 | { |
| 1157 | flags |= OBJF_READNOW; |
| 1158 | add_flags &= ~SYMFILE_NO_READ; |
| 1159 | } |
| 1160 | |
| 1161 | /* Give user a chance to burp if we'd be |
| 1162 | interactively wiping out any existing symbols. */ |
| 1163 | |
| 1164 | if ((have_full_symbols () || have_partial_symbols ()) |
| 1165 | && mainline |
| 1166 | && from_tty |
| 1167 | && !query (_("Load new symbol table from \"%s\"? "), name)) |
| 1168 | error (_("Not confirmed.")); |
| 1169 | |
| 1170 | objfile = allocate_objfile (abfd, name, |
| 1171 | flags | (mainline ? OBJF_MAINLINE : 0)); |
| 1172 | |
| 1173 | if (parent) |
| 1174 | add_separate_debug_objfile (objfile, parent); |
| 1175 | |
| 1176 | /* We either created a new mapped symbol table, mapped an existing |
| 1177 | symbol table file which has not had initial symbol reading |
| 1178 | performed, or need to read an unmapped symbol table. */ |
| 1179 | if (should_print) |
| 1180 | { |
| 1181 | if (deprecated_pre_add_symbol_hook) |
| 1182 | deprecated_pre_add_symbol_hook (name); |
| 1183 | else |
| 1184 | { |
| 1185 | printf_unfiltered (_("Reading symbols from %s..."), name); |
| 1186 | wrap_here (""); |
| 1187 | gdb_flush (gdb_stdout); |
| 1188 | } |
| 1189 | } |
| 1190 | syms_from_objfile (objfile, addrs, add_flags); |
| 1191 | |
| 1192 | /* We now have at least a partial symbol table. Check to see if the |
| 1193 | user requested that all symbols be read on initial access via either |
| 1194 | the gdb startup command line or on a per symbol file basis. Expand |
| 1195 | all partial symbol tables for this objfile if so. */ |
| 1196 | |
| 1197 | if ((flags & OBJF_READNOW)) |
| 1198 | { |
| 1199 | if (should_print) |
| 1200 | { |
| 1201 | printf_unfiltered (_("expanding to full symbols...")); |
| 1202 | wrap_here (""); |
| 1203 | gdb_flush (gdb_stdout); |
| 1204 | } |
| 1205 | |
| 1206 | if (objfile->sf) |
| 1207 | objfile->sf->qf->expand_all_symtabs (objfile); |
| 1208 | } |
| 1209 | |
| 1210 | if (should_print && !objfile_has_symbols (objfile)) |
| 1211 | { |
| 1212 | wrap_here (""); |
| 1213 | printf_unfiltered (_("(no debugging symbols found)...")); |
| 1214 | wrap_here (""); |
| 1215 | } |
| 1216 | |
| 1217 | if (should_print) |
| 1218 | { |
| 1219 | if (deprecated_post_add_symbol_hook) |
| 1220 | deprecated_post_add_symbol_hook (); |
| 1221 | else |
| 1222 | printf_unfiltered (_("done.\n")); |
| 1223 | } |
| 1224 | |
| 1225 | /* We print some messages regardless of whether 'from_tty || |
| 1226 | info_verbose' is true, so make sure they go out at the right |
| 1227 | time. */ |
| 1228 | gdb_flush (gdb_stdout); |
| 1229 | |
| 1230 | if (objfile->sf == NULL) |
| 1231 | { |
| 1232 | observer_notify_new_objfile (objfile); |
| 1233 | return objfile; /* No symbols. */ |
| 1234 | } |
| 1235 | |
| 1236 | finish_new_objfile (objfile, add_flags); |
| 1237 | |
| 1238 | observer_notify_new_objfile (objfile); |
| 1239 | |
| 1240 | bfd_cache_close_all (); |
| 1241 | return (objfile); |
| 1242 | } |
| 1243 | |
| 1244 | /* Add BFD as a separate debug file for OBJFILE. For NAME description |
| 1245 | see allocate_objfile's definition. */ |
| 1246 | |
| 1247 | void |
| 1248 | symbol_file_add_separate (bfd *bfd, const char *name, int symfile_flags, |
| 1249 | struct objfile *objfile) |
| 1250 | { |
| 1251 | struct objfile *new_objfile; |
| 1252 | struct section_addr_info *sap; |
| 1253 | struct cleanup *my_cleanup; |
| 1254 | |
| 1255 | /* Create section_addr_info. We can't directly use offsets from OBJFILE |
| 1256 | because sections of BFD may not match sections of OBJFILE and because |
| 1257 | vma may have been modified by tools such as prelink. */ |
| 1258 | sap = build_section_addr_info_from_objfile (objfile); |
| 1259 | my_cleanup = make_cleanup_free_section_addr_info (sap); |
| 1260 | |
| 1261 | new_objfile = symbol_file_add_with_addrs |
| 1262 | (bfd, name, symfile_flags, sap, |
| 1263 | objfile->flags & (OBJF_REORDERED | OBJF_SHARED | OBJF_READNOW |
| 1264 | | OBJF_USERLOADED), |
| 1265 | objfile); |
| 1266 | |
| 1267 | do_cleanups (my_cleanup); |
| 1268 | } |
| 1269 | |
| 1270 | /* Process the symbol file ABFD, as either the main file or as a |
| 1271 | dynamically loaded file. |
| 1272 | See symbol_file_add_with_addrs's comments for details. */ |
| 1273 | |
| 1274 | struct objfile * |
| 1275 | symbol_file_add_from_bfd (bfd *abfd, const char *name, int add_flags, |
| 1276 | struct section_addr_info *addrs, |
| 1277 | int flags, struct objfile *parent) |
| 1278 | { |
| 1279 | return symbol_file_add_with_addrs (abfd, name, add_flags, addrs, flags, |
| 1280 | parent); |
| 1281 | } |
| 1282 | |
| 1283 | /* Process a symbol file, as either the main file or as a dynamically |
| 1284 | loaded file. See symbol_file_add_with_addrs's comments for details. */ |
| 1285 | |
| 1286 | struct objfile * |
| 1287 | symbol_file_add (const char *name, int add_flags, |
| 1288 | struct section_addr_info *addrs, int flags) |
| 1289 | { |
| 1290 | bfd *bfd = symfile_bfd_open (name); |
| 1291 | struct cleanup *cleanup = make_cleanup_bfd_unref (bfd); |
| 1292 | struct objfile *objf; |
| 1293 | |
| 1294 | objf = symbol_file_add_from_bfd (bfd, name, add_flags, addrs, flags, NULL); |
| 1295 | do_cleanups (cleanup); |
| 1296 | return objf; |
| 1297 | } |
| 1298 | |
| 1299 | /* Call symbol_file_add() with default values and update whatever is |
| 1300 | affected by the loading of a new main(). |
| 1301 | Used when the file is supplied in the gdb command line |
| 1302 | and by some targets with special loading requirements. |
| 1303 | The auxiliary function, symbol_file_add_main_1(), has the flags |
| 1304 | argument for the switches that can only be specified in the symbol_file |
| 1305 | command itself. */ |
| 1306 | |
| 1307 | void |
| 1308 | symbol_file_add_main (const char *args, int from_tty) |
| 1309 | { |
| 1310 | symbol_file_add_main_1 (args, from_tty, 0); |
| 1311 | } |
| 1312 | |
| 1313 | static void |
| 1314 | symbol_file_add_main_1 (const char *args, int from_tty, int flags) |
| 1315 | { |
| 1316 | const int add_flags = (current_inferior ()->symfile_flags |
| 1317 | | SYMFILE_MAINLINE | (from_tty ? SYMFILE_VERBOSE : 0)); |
| 1318 | |
| 1319 | symbol_file_add (args, add_flags, NULL, flags); |
| 1320 | |
| 1321 | /* Getting new symbols may change our opinion about |
| 1322 | what is frameless. */ |
| 1323 | reinit_frame_cache (); |
| 1324 | |
| 1325 | if ((flags & SYMFILE_NO_READ) == 0) |
| 1326 | set_initial_language (); |
| 1327 | } |
| 1328 | |
| 1329 | void |
| 1330 | symbol_file_clear (int from_tty) |
| 1331 | { |
| 1332 | if ((have_full_symbols () || have_partial_symbols ()) |
| 1333 | && from_tty |
| 1334 | && (symfile_objfile |
| 1335 | ? !query (_("Discard symbol table from `%s'? "), |
| 1336 | objfile_name (symfile_objfile)) |
| 1337 | : !query (_("Discard symbol table? ")))) |
| 1338 | error (_("Not confirmed.")); |
| 1339 | |
| 1340 | /* solib descriptors may have handles to objfiles. Wipe them before their |
| 1341 | objfiles get stale by free_all_objfiles. */ |
| 1342 | no_shared_libraries (NULL, from_tty); |
| 1343 | |
| 1344 | free_all_objfiles (); |
| 1345 | |
| 1346 | gdb_assert (symfile_objfile == NULL); |
| 1347 | if (from_tty) |
| 1348 | printf_unfiltered (_("No symbol file now.\n")); |
| 1349 | } |
| 1350 | |
| 1351 | static int |
| 1352 | separate_debug_file_exists (const char *name, unsigned long crc, |
| 1353 | struct objfile *parent_objfile) |
| 1354 | { |
| 1355 | unsigned long file_crc; |
| 1356 | int file_crc_p; |
| 1357 | bfd *abfd; |
| 1358 | struct stat parent_stat, abfd_stat; |
| 1359 | int verified_as_different; |
| 1360 | |
| 1361 | /* Find a separate debug info file as if symbols would be present in |
| 1362 | PARENT_OBJFILE itself this function would not be called. .gnu_debuglink |
| 1363 | section can contain just the basename of PARENT_OBJFILE without any |
| 1364 | ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where |
| 1365 | the separate debug infos with the same basename can exist. */ |
| 1366 | |
| 1367 | if (filename_cmp (name, objfile_name (parent_objfile)) == 0) |
| 1368 | return 0; |
| 1369 | |
| 1370 | abfd = gdb_bfd_open (name, gnutarget, -1); |
| 1371 | |
| 1372 | if (!abfd) |
| 1373 | return 0; |
| 1374 | |
| 1375 | /* Verify symlinks were not the cause of filename_cmp name difference above. |
| 1376 | |
| 1377 | Some operating systems, e.g. Windows, do not provide a meaningful |
| 1378 | st_ino; they always set it to zero. (Windows does provide a |
| 1379 | meaningful st_dev.) Files accessed from gdbservers that do not |
| 1380 | support the vFile:fstat packet will also have st_ino set to zero. |
| 1381 | Do not indicate a duplicate library in either case. While there |
| 1382 | is no guarantee that a system that provides meaningful inode |
| 1383 | numbers will never set st_ino to zero, this is merely an |
| 1384 | optimization, so we do not need to worry about false negatives. */ |
| 1385 | |
| 1386 | if (bfd_stat (abfd, &abfd_stat) == 0 |
| 1387 | && abfd_stat.st_ino != 0 |
| 1388 | && bfd_stat (parent_objfile->obfd, &parent_stat) == 0) |
| 1389 | { |
| 1390 | if (abfd_stat.st_dev == parent_stat.st_dev |
| 1391 | && abfd_stat.st_ino == parent_stat.st_ino) |
| 1392 | { |
| 1393 | gdb_bfd_unref (abfd); |
| 1394 | return 0; |
| 1395 | } |
| 1396 | verified_as_different = 1; |
| 1397 | } |
| 1398 | else |
| 1399 | verified_as_different = 0; |
| 1400 | |
| 1401 | file_crc_p = gdb_bfd_crc (abfd, &file_crc); |
| 1402 | |
| 1403 | gdb_bfd_unref (abfd); |
| 1404 | |
| 1405 | if (!file_crc_p) |
| 1406 | return 0; |
| 1407 | |
| 1408 | if (crc != file_crc) |
| 1409 | { |
| 1410 | unsigned long parent_crc; |
| 1411 | |
| 1412 | /* If the files could not be verified as different with |
| 1413 | bfd_stat then we need to calculate the parent's CRC |
| 1414 | to verify whether the files are different or not. */ |
| 1415 | |
| 1416 | if (!verified_as_different) |
| 1417 | { |
| 1418 | if (!gdb_bfd_crc (parent_objfile->obfd, &parent_crc)) |
| 1419 | return 0; |
| 1420 | } |
| 1421 | |
| 1422 | if (verified_as_different || parent_crc != file_crc) |
| 1423 | warning (_("the debug information found in \"%s\"" |
| 1424 | " does not match \"%s\" (CRC mismatch).\n"), |
| 1425 | name, objfile_name (parent_objfile)); |
| 1426 | |
| 1427 | return 0; |
| 1428 | } |
| 1429 | |
| 1430 | return 1; |
| 1431 | } |
| 1432 | |
| 1433 | char *debug_file_directory = NULL; |
| 1434 | static void |
| 1435 | show_debug_file_directory (struct ui_file *file, int from_tty, |
| 1436 | struct cmd_list_element *c, const char *value) |
| 1437 | { |
| 1438 | fprintf_filtered (file, |
| 1439 | _("The directory where separate debug " |
| 1440 | "symbols are searched for is \"%s\".\n"), |
| 1441 | value); |
| 1442 | } |
| 1443 | |
| 1444 | #if ! defined (DEBUG_SUBDIRECTORY) |
| 1445 | #define DEBUG_SUBDIRECTORY ".debug" |
| 1446 | #endif |
| 1447 | |
| 1448 | /* Find a separate debuginfo file for OBJFILE, using DIR as the directory |
| 1449 | where the original file resides (may not be the same as |
| 1450 | dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are |
| 1451 | looking for. CANON_DIR is the "realpath" form of DIR. |
| 1452 | DIR must contain a trailing '/'. |
| 1453 | Returns the path of the file with separate debug info, of NULL. */ |
| 1454 | |
| 1455 | static char * |
| 1456 | find_separate_debug_file (const char *dir, |
| 1457 | const char *canon_dir, |
| 1458 | const char *debuglink, |
| 1459 | unsigned long crc32, struct objfile *objfile) |
| 1460 | { |
| 1461 | char *debugdir; |
| 1462 | char *debugfile; |
| 1463 | int i; |
| 1464 | VEC (char_ptr) *debugdir_vec; |
| 1465 | struct cleanup *back_to; |
| 1466 | int ix; |
| 1467 | |
| 1468 | /* Set I to max (strlen (canon_dir), strlen (dir)). */ |
| 1469 | i = strlen (dir); |
| 1470 | if (canon_dir != NULL && strlen (canon_dir) > i) |
| 1471 | i = strlen (canon_dir); |
| 1472 | |
| 1473 | debugfile = xmalloc (strlen (debug_file_directory) + 1 |
| 1474 | + i |
| 1475 | + strlen (DEBUG_SUBDIRECTORY) |
| 1476 | + strlen ("/") |
| 1477 | + strlen (debuglink) |
| 1478 | + 1); |
| 1479 | |
| 1480 | /* First try in the same directory as the original file. */ |
| 1481 | strcpy (debugfile, dir); |
| 1482 | strcat (debugfile, debuglink); |
| 1483 | |
| 1484 | if (separate_debug_file_exists (debugfile, crc32, objfile)) |
| 1485 | return debugfile; |
| 1486 | |
| 1487 | /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */ |
| 1488 | strcpy (debugfile, dir); |
| 1489 | strcat (debugfile, DEBUG_SUBDIRECTORY); |
| 1490 | strcat (debugfile, "/"); |
| 1491 | strcat (debugfile, debuglink); |
| 1492 | |
| 1493 | if (separate_debug_file_exists (debugfile, crc32, objfile)) |
| 1494 | return debugfile; |
| 1495 | |
| 1496 | /* Then try in the global debugfile directories. |
| 1497 | |
| 1498 | Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will |
| 1499 | cause "/..." lookups. */ |
| 1500 | |
| 1501 | debugdir_vec = dirnames_to_char_ptr_vec (debug_file_directory); |
| 1502 | back_to = make_cleanup_free_char_ptr_vec (debugdir_vec); |
| 1503 | |
| 1504 | for (ix = 0; VEC_iterate (char_ptr, debugdir_vec, ix, debugdir); ++ix) |
| 1505 | { |
| 1506 | strcpy (debugfile, debugdir); |
| 1507 | strcat (debugfile, "/"); |
| 1508 | strcat (debugfile, dir); |
| 1509 | strcat (debugfile, debuglink); |
| 1510 | |
| 1511 | if (separate_debug_file_exists (debugfile, crc32, objfile)) |
| 1512 | { |
| 1513 | do_cleanups (back_to); |
| 1514 | return debugfile; |
| 1515 | } |
| 1516 | |
| 1517 | /* If the file is in the sysroot, try using its base path in the |
| 1518 | global debugfile directory. */ |
| 1519 | if (canon_dir != NULL |
| 1520 | && filename_ncmp (canon_dir, gdb_sysroot, |
| 1521 | strlen (gdb_sysroot)) == 0 |
| 1522 | && IS_DIR_SEPARATOR (canon_dir[strlen (gdb_sysroot)])) |
| 1523 | { |
| 1524 | strcpy (debugfile, debugdir); |
| 1525 | strcat (debugfile, canon_dir + strlen (gdb_sysroot)); |
| 1526 | strcat (debugfile, "/"); |
| 1527 | strcat (debugfile, debuglink); |
| 1528 | |
| 1529 | if (separate_debug_file_exists (debugfile, crc32, objfile)) |
| 1530 | { |
| 1531 | do_cleanups (back_to); |
| 1532 | return debugfile; |
| 1533 | } |
| 1534 | } |
| 1535 | } |
| 1536 | |
| 1537 | do_cleanups (back_to); |
| 1538 | xfree (debugfile); |
| 1539 | return NULL; |
| 1540 | } |
| 1541 | |
| 1542 | /* Modify PATH to contain only "[/]directory/" part of PATH. |
| 1543 | If there were no directory separators in PATH, PATH will be empty |
| 1544 | string on return. */ |
| 1545 | |
| 1546 | static void |
| 1547 | terminate_after_last_dir_separator (char *path) |
| 1548 | { |
| 1549 | int i; |
| 1550 | |
| 1551 | /* Strip off the final filename part, leaving the directory name, |
| 1552 | followed by a slash. The directory can be relative or absolute. */ |
| 1553 | for (i = strlen(path) - 1; i >= 0; i--) |
| 1554 | if (IS_DIR_SEPARATOR (path[i])) |
| 1555 | break; |
| 1556 | |
| 1557 | /* If I is -1 then no directory is present there and DIR will be "". */ |
| 1558 | path[i + 1] = '\0'; |
| 1559 | } |
| 1560 | |
| 1561 | /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section). |
| 1562 | Returns pathname, or NULL. */ |
| 1563 | |
| 1564 | char * |
| 1565 | find_separate_debug_file_by_debuglink (struct objfile *objfile) |
| 1566 | { |
| 1567 | char *debuglink; |
| 1568 | char *dir, *canon_dir; |
| 1569 | char *debugfile; |
| 1570 | unsigned long crc32; |
| 1571 | struct cleanup *cleanups; |
| 1572 | |
| 1573 | debuglink = bfd_get_debug_link_info (objfile->obfd, &crc32); |
| 1574 | |
| 1575 | if (debuglink == NULL) |
| 1576 | { |
| 1577 | /* There's no separate debug info, hence there's no way we could |
| 1578 | load it => no warning. */ |
| 1579 | return NULL; |
| 1580 | } |
| 1581 | |
| 1582 | cleanups = make_cleanup (xfree, debuglink); |
| 1583 | dir = xstrdup (objfile_name (objfile)); |
| 1584 | make_cleanup (xfree, dir); |
| 1585 | terminate_after_last_dir_separator (dir); |
| 1586 | canon_dir = lrealpath (dir); |
| 1587 | |
| 1588 | debugfile = find_separate_debug_file (dir, canon_dir, debuglink, |
| 1589 | crc32, objfile); |
| 1590 | xfree (canon_dir); |
| 1591 | |
| 1592 | if (debugfile == NULL) |
| 1593 | { |
| 1594 | /* For PR gdb/9538, try again with realpath (if different from the |
| 1595 | original). */ |
| 1596 | |
| 1597 | struct stat st_buf; |
| 1598 | |
| 1599 | if (lstat (objfile_name (objfile), &st_buf) == 0 |
| 1600 | && S_ISLNK (st_buf.st_mode)) |
| 1601 | { |
| 1602 | char *symlink_dir; |
| 1603 | |
| 1604 | symlink_dir = lrealpath (objfile_name (objfile)); |
| 1605 | if (symlink_dir != NULL) |
| 1606 | { |
| 1607 | make_cleanup (xfree, symlink_dir); |
| 1608 | terminate_after_last_dir_separator (symlink_dir); |
| 1609 | if (strcmp (dir, symlink_dir) != 0) |
| 1610 | { |
| 1611 | /* Different directory, so try using it. */ |
| 1612 | debugfile = find_separate_debug_file (symlink_dir, |
| 1613 | symlink_dir, |
| 1614 | debuglink, |
| 1615 | crc32, |
| 1616 | objfile); |
| 1617 | } |
| 1618 | } |
| 1619 | } |
| 1620 | } |
| 1621 | |
| 1622 | do_cleanups (cleanups); |
| 1623 | return debugfile; |
| 1624 | } |
| 1625 | |
| 1626 | /* This is the symbol-file command. Read the file, analyze its |
| 1627 | symbols, and add a struct symtab to a symtab list. The syntax of |
| 1628 | the command is rather bizarre: |
| 1629 | |
| 1630 | 1. The function buildargv implements various quoting conventions |
| 1631 | which are undocumented and have little or nothing in common with |
| 1632 | the way things are quoted (or not quoted) elsewhere in GDB. |
| 1633 | |
| 1634 | 2. Options are used, which are not generally used in GDB (perhaps |
| 1635 | "set mapped on", "set readnow on" would be better) |
| 1636 | |
| 1637 | 3. The order of options matters, which is contrary to GNU |
| 1638 | conventions (because it is confusing and inconvenient). */ |
| 1639 | |
| 1640 | void |
| 1641 | symbol_file_command (char *args, int from_tty) |
| 1642 | { |
| 1643 | dont_repeat (); |
| 1644 | |
| 1645 | if (args == NULL) |
| 1646 | { |
| 1647 | symbol_file_clear (from_tty); |
| 1648 | } |
| 1649 | else |
| 1650 | { |
| 1651 | char **argv = gdb_buildargv (args); |
| 1652 | int flags = OBJF_USERLOADED; |
| 1653 | struct cleanup *cleanups; |
| 1654 | char *name = NULL; |
| 1655 | |
| 1656 | cleanups = make_cleanup_freeargv (argv); |
| 1657 | while (*argv != NULL) |
| 1658 | { |
| 1659 | if (strcmp (*argv, "-readnow") == 0) |
| 1660 | flags |= OBJF_READNOW; |
| 1661 | else if (**argv == '-') |
| 1662 | error (_("unknown option `%s'"), *argv); |
| 1663 | else |
| 1664 | { |
| 1665 | symbol_file_add_main_1 (*argv, from_tty, flags); |
| 1666 | name = *argv; |
| 1667 | } |
| 1668 | |
| 1669 | argv++; |
| 1670 | } |
| 1671 | |
| 1672 | if (name == NULL) |
| 1673 | error (_("no symbol file name was specified")); |
| 1674 | |
| 1675 | do_cleanups (cleanups); |
| 1676 | } |
| 1677 | } |
| 1678 | |
| 1679 | /* Set the initial language. |
| 1680 | |
| 1681 | FIXME: A better solution would be to record the language in the |
| 1682 | psymtab when reading partial symbols, and then use it (if known) to |
| 1683 | set the language. This would be a win for formats that encode the |
| 1684 | language in an easily discoverable place, such as DWARF. For |
| 1685 | stabs, we can jump through hoops looking for specially named |
| 1686 | symbols or try to intuit the language from the specific type of |
| 1687 | stabs we find, but we can't do that until later when we read in |
| 1688 | full symbols. */ |
| 1689 | |
| 1690 | void |
| 1691 | set_initial_language (void) |
| 1692 | { |
| 1693 | enum language lang = main_language (); |
| 1694 | |
| 1695 | if (lang == language_unknown) |
| 1696 | { |
| 1697 | char *name = main_name (); |
| 1698 | struct symbol *sym = lookup_symbol (name, NULL, VAR_DOMAIN, NULL).symbol; |
| 1699 | |
| 1700 | if (sym != NULL) |
| 1701 | lang = SYMBOL_LANGUAGE (sym); |
| 1702 | } |
| 1703 | |
| 1704 | if (lang == language_unknown) |
| 1705 | { |
| 1706 | /* Make C the default language */ |
| 1707 | lang = language_c; |
| 1708 | } |
| 1709 | |
| 1710 | set_language (lang); |
| 1711 | expected_language = current_language; /* Don't warn the user. */ |
| 1712 | } |
| 1713 | |
| 1714 | /* Open the file specified by NAME and hand it off to BFD for |
| 1715 | preliminary analysis. Return a newly initialized bfd *, which |
| 1716 | includes a newly malloc'd` copy of NAME (tilde-expanded and made |
| 1717 | absolute). In case of trouble, error() is called. */ |
| 1718 | |
| 1719 | bfd * |
| 1720 | symfile_bfd_open (const char *name) |
| 1721 | { |
| 1722 | bfd *sym_bfd; |
| 1723 | int desc = -1; |
| 1724 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
| 1725 | |
| 1726 | if (!is_target_filename (name)) |
| 1727 | { |
| 1728 | char *expanded_name, *absolute_name; |
| 1729 | |
| 1730 | expanded_name = tilde_expand (name); /* Returns 1st new malloc'd copy. */ |
| 1731 | |
| 1732 | /* Look down path for it, allocate 2nd new malloc'd copy. */ |
| 1733 | desc = openp (getenv ("PATH"), |
| 1734 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, |
| 1735 | expanded_name, O_RDONLY | O_BINARY, &absolute_name); |
| 1736 | #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__) |
| 1737 | if (desc < 0) |
| 1738 | { |
| 1739 | char *exename = alloca (strlen (expanded_name) + 5); |
| 1740 | |
| 1741 | strcat (strcpy (exename, expanded_name), ".exe"); |
| 1742 | desc = openp (getenv ("PATH"), |
| 1743 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, |
| 1744 | exename, O_RDONLY | O_BINARY, &absolute_name); |
| 1745 | } |
| 1746 | #endif |
| 1747 | if (desc < 0) |
| 1748 | { |
| 1749 | make_cleanup (xfree, expanded_name); |
| 1750 | perror_with_name (expanded_name); |
| 1751 | } |
| 1752 | |
| 1753 | xfree (expanded_name); |
| 1754 | make_cleanup (xfree, absolute_name); |
| 1755 | name = absolute_name; |
| 1756 | } |
| 1757 | |
| 1758 | sym_bfd = gdb_bfd_open (name, gnutarget, desc); |
| 1759 | if (!sym_bfd) |
| 1760 | error (_("`%s': can't open to read symbols: %s."), name, |
| 1761 | bfd_errmsg (bfd_get_error ())); |
| 1762 | |
| 1763 | if (!gdb_bfd_has_target_filename (sym_bfd)) |
| 1764 | bfd_set_cacheable (sym_bfd, 1); |
| 1765 | |
| 1766 | if (!bfd_check_format (sym_bfd, bfd_object)) |
| 1767 | { |
| 1768 | make_cleanup_bfd_unref (sym_bfd); |
| 1769 | error (_("`%s': can't read symbols: %s."), name, |
| 1770 | bfd_errmsg (bfd_get_error ())); |
| 1771 | } |
| 1772 | |
| 1773 | do_cleanups (back_to); |
| 1774 | |
| 1775 | return sym_bfd; |
| 1776 | } |
| 1777 | |
| 1778 | /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if |
| 1779 | the section was not found. */ |
| 1780 | |
| 1781 | int |
| 1782 | get_section_index (struct objfile *objfile, char *section_name) |
| 1783 | { |
| 1784 | asection *sect = bfd_get_section_by_name (objfile->obfd, section_name); |
| 1785 | |
| 1786 | if (sect) |
| 1787 | return sect->index; |
| 1788 | else |
| 1789 | return -1; |
| 1790 | } |
| 1791 | |
| 1792 | /* Link SF into the global symtab_fns list. |
| 1793 | FLAVOUR is the file format that SF handles. |
| 1794 | Called on startup by the _initialize routine in each object file format |
| 1795 | reader, to register information about each format the reader is prepared |
| 1796 | to handle. */ |
| 1797 | |
| 1798 | void |
| 1799 | add_symtab_fns (enum bfd_flavour flavour, const struct sym_fns *sf) |
| 1800 | { |
| 1801 | registered_sym_fns fns = { flavour, sf }; |
| 1802 | |
| 1803 | VEC_safe_push (registered_sym_fns, symtab_fns, &fns); |
| 1804 | } |
| 1805 | |
| 1806 | /* Initialize OBJFILE to read symbols from its associated BFD. It |
| 1807 | either returns or calls error(). The result is an initialized |
| 1808 | struct sym_fns in the objfile structure, that contains cached |
| 1809 | information about the symbol file. */ |
| 1810 | |
| 1811 | static const struct sym_fns * |
| 1812 | find_sym_fns (bfd *abfd) |
| 1813 | { |
| 1814 | registered_sym_fns *rsf; |
| 1815 | enum bfd_flavour our_flavour = bfd_get_flavour (abfd); |
| 1816 | int i; |
| 1817 | |
| 1818 | if (our_flavour == bfd_target_srec_flavour |
| 1819 | || our_flavour == bfd_target_ihex_flavour |
| 1820 | || our_flavour == bfd_target_tekhex_flavour) |
| 1821 | return NULL; /* No symbols. */ |
| 1822 | |
| 1823 | for (i = 0; VEC_iterate (registered_sym_fns, symtab_fns, i, rsf); ++i) |
| 1824 | if (our_flavour == rsf->sym_flavour) |
| 1825 | return rsf->sym_fns; |
| 1826 | |
| 1827 | error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."), |
| 1828 | bfd_get_target (abfd)); |
| 1829 | } |
| 1830 | \f |
| 1831 | |
| 1832 | /* This function runs the load command of our current target. */ |
| 1833 | |
| 1834 | static void |
| 1835 | load_command (char *arg, int from_tty) |
| 1836 | { |
| 1837 | struct cleanup *cleanup = make_cleanup (null_cleanup, NULL); |
| 1838 | |
| 1839 | dont_repeat (); |
| 1840 | |
| 1841 | /* The user might be reloading because the binary has changed. Take |
| 1842 | this opportunity to check. */ |
| 1843 | reopen_exec_file (); |
| 1844 | reread_symbols (); |
| 1845 | |
| 1846 | if (arg == NULL) |
| 1847 | { |
| 1848 | char *parg; |
| 1849 | int count = 0; |
| 1850 | |
| 1851 | parg = arg = get_exec_file (1); |
| 1852 | |
| 1853 | /* Count how many \ " ' tab space there are in the name. */ |
| 1854 | while ((parg = strpbrk (parg, "\\\"'\t "))) |
| 1855 | { |
| 1856 | parg++; |
| 1857 | count++; |
| 1858 | } |
| 1859 | |
| 1860 | if (count) |
| 1861 | { |
| 1862 | /* We need to quote this string so buildargv can pull it apart. */ |
| 1863 | char *temp = xmalloc (strlen (arg) + count + 1 ); |
| 1864 | char *ptemp = temp; |
| 1865 | char *prev; |
| 1866 | |
| 1867 | make_cleanup (xfree, temp); |
| 1868 | |
| 1869 | prev = parg = arg; |
| 1870 | while ((parg = strpbrk (parg, "\\\"'\t "))) |
| 1871 | { |
| 1872 | strncpy (ptemp, prev, parg - prev); |
| 1873 | ptemp += parg - prev; |
| 1874 | prev = parg++; |
| 1875 | *ptemp++ = '\\'; |
| 1876 | } |
| 1877 | strcpy (ptemp, prev); |
| 1878 | |
| 1879 | arg = temp; |
| 1880 | } |
| 1881 | } |
| 1882 | |
| 1883 | target_load (arg, from_tty); |
| 1884 | |
| 1885 | /* After re-loading the executable, we don't really know which |
| 1886 | overlays are mapped any more. */ |
| 1887 | overlay_cache_invalid = 1; |
| 1888 | |
| 1889 | do_cleanups (cleanup); |
| 1890 | } |
| 1891 | |
| 1892 | /* This version of "load" should be usable for any target. Currently |
| 1893 | it is just used for remote targets, not inftarg.c or core files, |
| 1894 | on the theory that only in that case is it useful. |
| 1895 | |
| 1896 | Avoiding xmodem and the like seems like a win (a) because we don't have |
| 1897 | to worry about finding it, and (b) On VMS, fork() is very slow and so |
| 1898 | we don't want to run a subprocess. On the other hand, I'm not sure how |
| 1899 | performance compares. */ |
| 1900 | |
| 1901 | static int validate_download = 0; |
| 1902 | |
| 1903 | /* Callback service function for generic_load (bfd_map_over_sections). */ |
| 1904 | |
| 1905 | static void |
| 1906 | add_section_size_callback (bfd *abfd, asection *asec, void *data) |
| 1907 | { |
| 1908 | bfd_size_type *sum = data; |
| 1909 | |
| 1910 | *sum += bfd_get_section_size (asec); |
| 1911 | } |
| 1912 | |
| 1913 | /* Opaque data for load_section_callback. */ |
| 1914 | struct load_section_data { |
| 1915 | CORE_ADDR load_offset; |
| 1916 | struct load_progress_data *progress_data; |
| 1917 | VEC(memory_write_request_s) *requests; |
| 1918 | }; |
| 1919 | |
| 1920 | /* Opaque data for load_progress. */ |
| 1921 | struct load_progress_data { |
| 1922 | /* Cumulative data. */ |
| 1923 | unsigned long write_count; |
| 1924 | unsigned long data_count; |
| 1925 | bfd_size_type total_size; |
| 1926 | }; |
| 1927 | |
| 1928 | /* Opaque data for load_progress for a single section. */ |
| 1929 | struct load_progress_section_data { |
| 1930 | struct load_progress_data *cumulative; |
| 1931 | |
| 1932 | /* Per-section data. */ |
| 1933 | const char *section_name; |
| 1934 | ULONGEST section_sent; |
| 1935 | ULONGEST section_size; |
| 1936 | CORE_ADDR lma; |
| 1937 | gdb_byte *buffer; |
| 1938 | }; |
| 1939 | |
| 1940 | /* Target write callback routine for progress reporting. */ |
| 1941 | |
| 1942 | static void |
| 1943 | load_progress (ULONGEST bytes, void *untyped_arg) |
| 1944 | { |
| 1945 | struct load_progress_section_data *args = untyped_arg; |
| 1946 | struct load_progress_data *totals; |
| 1947 | |
| 1948 | if (args == NULL) |
| 1949 | /* Writing padding data. No easy way to get at the cumulative |
| 1950 | stats, so just ignore this. */ |
| 1951 | return; |
| 1952 | |
| 1953 | totals = args->cumulative; |
| 1954 | |
| 1955 | if (bytes == 0 && args->section_sent == 0) |
| 1956 | { |
| 1957 | /* The write is just starting. Let the user know we've started |
| 1958 | this section. */ |
| 1959 | ui_out_message (current_uiout, 0, "Loading section %s, size %s lma %s\n", |
| 1960 | args->section_name, hex_string (args->section_size), |
| 1961 | paddress (target_gdbarch (), args->lma)); |
| 1962 | return; |
| 1963 | } |
| 1964 | |
| 1965 | if (validate_download) |
| 1966 | { |
| 1967 | /* Broken memories and broken monitors manifest themselves here |
| 1968 | when bring new computers to life. This doubles already slow |
| 1969 | downloads. */ |
| 1970 | /* NOTE: cagney/1999-10-18: A more efficient implementation |
| 1971 | might add a verify_memory() method to the target vector and |
| 1972 | then use that. remote.c could implement that method using |
| 1973 | the ``qCRC'' packet. */ |
| 1974 | gdb_byte *check = xmalloc (bytes); |
| 1975 | struct cleanup *verify_cleanups = make_cleanup (xfree, check); |
| 1976 | |
| 1977 | if (target_read_memory (args->lma, check, bytes) != 0) |
| 1978 | error (_("Download verify read failed at %s"), |
| 1979 | paddress (target_gdbarch (), args->lma)); |
| 1980 | if (memcmp (args->buffer, check, bytes) != 0) |
| 1981 | error (_("Download verify compare failed at %s"), |
| 1982 | paddress (target_gdbarch (), args->lma)); |
| 1983 | do_cleanups (verify_cleanups); |
| 1984 | } |
| 1985 | totals->data_count += bytes; |
| 1986 | args->lma += bytes; |
| 1987 | args->buffer += bytes; |
| 1988 | totals->write_count += 1; |
| 1989 | args->section_sent += bytes; |
| 1990 | if (check_quit_flag () |
| 1991 | || (deprecated_ui_load_progress_hook != NULL |
| 1992 | && deprecated_ui_load_progress_hook (args->section_name, |
| 1993 | args->section_sent))) |
| 1994 | error (_("Canceled the download")); |
| 1995 | |
| 1996 | if (deprecated_show_load_progress != NULL) |
| 1997 | deprecated_show_load_progress (args->section_name, |
| 1998 | args->section_sent, |
| 1999 | args->section_size, |
| 2000 | totals->data_count, |
| 2001 | totals->total_size); |
| 2002 | } |
| 2003 | |
| 2004 | /* Callback service function for generic_load (bfd_map_over_sections). */ |
| 2005 | |
| 2006 | static void |
| 2007 | load_section_callback (bfd *abfd, asection *asec, void *data) |
| 2008 | { |
| 2009 | struct memory_write_request *new_request; |
| 2010 | struct load_section_data *args = data; |
| 2011 | struct load_progress_section_data *section_data; |
| 2012 | bfd_size_type size = bfd_get_section_size (asec); |
| 2013 | gdb_byte *buffer; |
| 2014 | const char *sect_name = bfd_get_section_name (abfd, asec); |
| 2015 | |
| 2016 | if ((bfd_get_section_flags (abfd, asec) & SEC_LOAD) == 0) |
| 2017 | return; |
| 2018 | |
| 2019 | if (size == 0) |
| 2020 | return; |
| 2021 | |
| 2022 | new_request = VEC_safe_push (memory_write_request_s, |
| 2023 | args->requests, NULL); |
| 2024 | memset (new_request, 0, sizeof (struct memory_write_request)); |
| 2025 | section_data = XCNEW (struct load_progress_section_data); |
| 2026 | new_request->begin = bfd_section_lma (abfd, asec) + args->load_offset; |
| 2027 | new_request->end = new_request->begin + size; /* FIXME Should size |
| 2028 | be in instead? */ |
| 2029 | new_request->data = xmalloc (size); |
| 2030 | new_request->baton = section_data; |
| 2031 | |
| 2032 | buffer = new_request->data; |
| 2033 | |
| 2034 | section_data->cumulative = args->progress_data; |
| 2035 | section_data->section_name = sect_name; |
| 2036 | section_data->section_size = size; |
| 2037 | section_data->lma = new_request->begin; |
| 2038 | section_data->buffer = buffer; |
| 2039 | |
| 2040 | bfd_get_section_contents (abfd, asec, buffer, 0, size); |
| 2041 | } |
| 2042 | |
| 2043 | /* Clean up an entire memory request vector, including load |
| 2044 | data and progress records. */ |
| 2045 | |
| 2046 | static void |
| 2047 | clear_memory_write_data (void *arg) |
| 2048 | { |
| 2049 | VEC(memory_write_request_s) **vec_p = arg; |
| 2050 | VEC(memory_write_request_s) *vec = *vec_p; |
| 2051 | int i; |
| 2052 | struct memory_write_request *mr; |
| 2053 | |
| 2054 | for (i = 0; VEC_iterate (memory_write_request_s, vec, i, mr); ++i) |
| 2055 | { |
| 2056 | xfree (mr->data); |
| 2057 | xfree (mr->baton); |
| 2058 | } |
| 2059 | VEC_free (memory_write_request_s, vec); |
| 2060 | } |
| 2061 | |
| 2062 | void |
| 2063 | generic_load (const char *args, int from_tty) |
| 2064 | { |
| 2065 | bfd *loadfile_bfd; |
| 2066 | struct timeval start_time, end_time; |
| 2067 | char *filename; |
| 2068 | struct cleanup *old_cleanups = make_cleanup (null_cleanup, 0); |
| 2069 | struct load_section_data cbdata; |
| 2070 | struct load_progress_data total_progress; |
| 2071 | struct ui_out *uiout = current_uiout; |
| 2072 | |
| 2073 | CORE_ADDR entry; |
| 2074 | char **argv; |
| 2075 | |
| 2076 | memset (&cbdata, 0, sizeof (cbdata)); |
| 2077 | memset (&total_progress, 0, sizeof (total_progress)); |
| 2078 | cbdata.progress_data = &total_progress; |
| 2079 | |
| 2080 | make_cleanup (clear_memory_write_data, &cbdata.requests); |
| 2081 | |
| 2082 | if (args == NULL) |
| 2083 | error_no_arg (_("file to load")); |
| 2084 | |
| 2085 | argv = gdb_buildargv (args); |
| 2086 | make_cleanup_freeargv (argv); |
| 2087 | |
| 2088 | filename = tilde_expand (argv[0]); |
| 2089 | make_cleanup (xfree, filename); |
| 2090 | |
| 2091 | if (argv[1] != NULL) |
| 2092 | { |
| 2093 | const char *endptr; |
| 2094 | |
| 2095 | cbdata.load_offset = strtoulst (argv[1], &endptr, 0); |
| 2096 | |
| 2097 | /* If the last word was not a valid number then |
| 2098 | treat it as a file name with spaces in. */ |
| 2099 | if (argv[1] == endptr) |
| 2100 | error (_("Invalid download offset:%s."), argv[1]); |
| 2101 | |
| 2102 | if (argv[2] != NULL) |
| 2103 | error (_("Too many parameters.")); |
| 2104 | } |
| 2105 | |
| 2106 | /* Open the file for loading. */ |
| 2107 | loadfile_bfd = gdb_bfd_open (filename, gnutarget, -1); |
| 2108 | if (loadfile_bfd == NULL) |
| 2109 | { |
| 2110 | perror_with_name (filename); |
| 2111 | return; |
| 2112 | } |
| 2113 | |
| 2114 | make_cleanup_bfd_unref (loadfile_bfd); |
| 2115 | |
| 2116 | if (!bfd_check_format (loadfile_bfd, bfd_object)) |
| 2117 | { |
| 2118 | error (_("\"%s\" is not an object file: %s"), filename, |
| 2119 | bfd_errmsg (bfd_get_error ())); |
| 2120 | } |
| 2121 | |
| 2122 | bfd_map_over_sections (loadfile_bfd, add_section_size_callback, |
| 2123 | (void *) &total_progress.total_size); |
| 2124 | |
| 2125 | bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata); |
| 2126 | |
| 2127 | gettimeofday (&start_time, NULL); |
| 2128 | |
| 2129 | if (target_write_memory_blocks (cbdata.requests, flash_discard, |
| 2130 | load_progress) != 0) |
| 2131 | error (_("Load failed")); |
| 2132 | |
| 2133 | gettimeofday (&end_time, NULL); |
| 2134 | |
| 2135 | entry = bfd_get_start_address (loadfile_bfd); |
| 2136 | entry = gdbarch_addr_bits_remove (target_gdbarch (), entry); |
| 2137 | ui_out_text (uiout, "Start address "); |
| 2138 | ui_out_field_fmt (uiout, "address", "%s", paddress (target_gdbarch (), entry)); |
| 2139 | ui_out_text (uiout, ", load size "); |
| 2140 | ui_out_field_fmt (uiout, "load-size", "%lu", total_progress.data_count); |
| 2141 | ui_out_text (uiout, "\n"); |
| 2142 | /* We were doing this in remote-mips.c, I suspect it is right |
| 2143 | for other targets too. */ |
| 2144 | regcache_write_pc (get_current_regcache (), entry); |
| 2145 | |
| 2146 | /* Reset breakpoints, now that we have changed the load image. For |
| 2147 | instance, breakpoints may have been set (or reset, by |
| 2148 | post_create_inferior) while connected to the target but before we |
| 2149 | loaded the program. In that case, the prologue analyzer could |
| 2150 | have read instructions from the target to find the right |
| 2151 | breakpoint locations. Loading has changed the contents of that |
| 2152 | memory. */ |
| 2153 | |
| 2154 | breakpoint_re_set (); |
| 2155 | |
| 2156 | /* FIXME: are we supposed to call symbol_file_add or not? According |
| 2157 | to a comment from remote-mips.c (where a call to symbol_file_add |
| 2158 | was commented out), making the call confuses GDB if more than one |
| 2159 | file is loaded in. Some targets do (e.g., remote-vx.c) but |
| 2160 | others don't (or didn't - perhaps they have all been deleted). */ |
| 2161 | |
| 2162 | print_transfer_performance (gdb_stdout, total_progress.data_count, |
| 2163 | total_progress.write_count, |
| 2164 | &start_time, &end_time); |
| 2165 | |
| 2166 | do_cleanups (old_cleanups); |
| 2167 | } |
| 2168 | |
| 2169 | /* Report how fast the transfer went. */ |
| 2170 | |
| 2171 | void |
| 2172 | print_transfer_performance (struct ui_file *stream, |
| 2173 | unsigned long data_count, |
| 2174 | unsigned long write_count, |
| 2175 | const struct timeval *start_time, |
| 2176 | const struct timeval *end_time) |
| 2177 | { |
| 2178 | ULONGEST time_count; |
| 2179 | struct ui_out *uiout = current_uiout; |
| 2180 | |
| 2181 | /* Compute the elapsed time in milliseconds, as a tradeoff between |
| 2182 | accuracy and overflow. */ |
| 2183 | time_count = (end_time->tv_sec - start_time->tv_sec) * 1000; |
| 2184 | time_count += (end_time->tv_usec - start_time->tv_usec) / 1000; |
| 2185 | |
| 2186 | ui_out_text (uiout, "Transfer rate: "); |
| 2187 | if (time_count > 0) |
| 2188 | { |
| 2189 | unsigned long rate = ((ULONGEST) data_count * 1000) / time_count; |
| 2190 | |
| 2191 | if (ui_out_is_mi_like_p (uiout)) |
| 2192 | { |
| 2193 | ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate * 8); |
| 2194 | ui_out_text (uiout, " bits/sec"); |
| 2195 | } |
| 2196 | else if (rate < 1024) |
| 2197 | { |
| 2198 | ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate); |
| 2199 | ui_out_text (uiout, " bytes/sec"); |
| 2200 | } |
| 2201 | else |
| 2202 | { |
| 2203 | ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate / 1024); |
| 2204 | ui_out_text (uiout, " KB/sec"); |
| 2205 | } |
| 2206 | } |
| 2207 | else |
| 2208 | { |
| 2209 | ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8)); |
| 2210 | ui_out_text (uiout, " bits in <1 sec"); |
| 2211 | } |
| 2212 | if (write_count > 0) |
| 2213 | { |
| 2214 | ui_out_text (uiout, ", "); |
| 2215 | ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count); |
| 2216 | ui_out_text (uiout, " bytes/write"); |
| 2217 | } |
| 2218 | ui_out_text (uiout, ".\n"); |
| 2219 | } |
| 2220 | |
| 2221 | /* This function allows the addition of incrementally linked object files. |
| 2222 | It does not modify any state in the target, only in the debugger. */ |
| 2223 | /* Note: ezannoni 2000-04-13 This function/command used to have a |
| 2224 | special case syntax for the rombug target (Rombug is the boot |
| 2225 | monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the |
| 2226 | rombug case, the user doesn't need to supply a text address, |
| 2227 | instead a call to target_link() (in target.c) would supply the |
| 2228 | value to use. We are now discontinuing this type of ad hoc syntax. */ |
| 2229 | |
| 2230 | static void |
| 2231 | add_symbol_file_command (char *args, int from_tty) |
| 2232 | { |
| 2233 | struct gdbarch *gdbarch = get_current_arch (); |
| 2234 | char *filename = NULL; |
| 2235 | int flags = OBJF_USERLOADED | OBJF_SHARED; |
| 2236 | char *arg; |
| 2237 | int section_index = 0; |
| 2238 | int argcnt = 0; |
| 2239 | int sec_num = 0; |
| 2240 | int i; |
| 2241 | int expecting_sec_name = 0; |
| 2242 | int expecting_sec_addr = 0; |
| 2243 | char **argv; |
| 2244 | struct objfile *objf; |
| 2245 | |
| 2246 | struct sect_opt |
| 2247 | { |
| 2248 | char *name; |
| 2249 | char *value; |
| 2250 | }; |
| 2251 | |
| 2252 | struct section_addr_info *section_addrs; |
| 2253 | struct sect_opt *sect_opts = NULL; |
| 2254 | size_t num_sect_opts = 0; |
| 2255 | struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL); |
| 2256 | |
| 2257 | num_sect_opts = 16; |
| 2258 | sect_opts = XNEWVEC (struct sect_opt, num_sect_opts); |
| 2259 | |
| 2260 | dont_repeat (); |
| 2261 | |
| 2262 | if (args == NULL) |
| 2263 | error (_("add-symbol-file takes a file name and an address")); |
| 2264 | |
| 2265 | argv = gdb_buildargv (args); |
| 2266 | make_cleanup_freeargv (argv); |
| 2267 | |
| 2268 | for (arg = argv[0], argcnt = 0; arg != NULL; arg = argv[++argcnt]) |
| 2269 | { |
| 2270 | /* Process the argument. */ |
| 2271 | if (argcnt == 0) |
| 2272 | { |
| 2273 | /* The first argument is the file name. */ |
| 2274 | filename = tilde_expand (arg); |
| 2275 | make_cleanup (xfree, filename); |
| 2276 | } |
| 2277 | else if (argcnt == 1) |
| 2278 | { |
| 2279 | /* The second argument is always the text address at which |
| 2280 | to load the program. */ |
| 2281 | sect_opts[section_index].name = ".text"; |
| 2282 | sect_opts[section_index].value = arg; |
| 2283 | if (++section_index >= num_sect_opts) |
| 2284 | { |
| 2285 | num_sect_opts *= 2; |
| 2286 | sect_opts = ((struct sect_opt *) |
| 2287 | xrealloc (sect_opts, |
| 2288 | num_sect_opts |
| 2289 | * sizeof (struct sect_opt))); |
| 2290 | } |
| 2291 | } |
| 2292 | else |
| 2293 | { |
| 2294 | /* It's an option (starting with '-') or it's an argument |
| 2295 | to an option. */ |
| 2296 | if (expecting_sec_name) |
| 2297 | { |
| 2298 | sect_opts[section_index].name = arg; |
| 2299 | expecting_sec_name = 0; |
| 2300 | } |
| 2301 | else if (expecting_sec_addr) |
| 2302 | { |
| 2303 | sect_opts[section_index].value = arg; |
| 2304 | expecting_sec_addr = 0; |
| 2305 | if (++section_index >= num_sect_opts) |
| 2306 | { |
| 2307 | num_sect_opts *= 2; |
| 2308 | sect_opts = ((struct sect_opt *) |
| 2309 | xrealloc (sect_opts, |
| 2310 | num_sect_opts |
| 2311 | * sizeof (struct sect_opt))); |
| 2312 | } |
| 2313 | } |
| 2314 | else if (strcmp (arg, "-readnow") == 0) |
| 2315 | flags |= OBJF_READNOW; |
| 2316 | else if (strcmp (arg, "-s") == 0) |
| 2317 | { |
| 2318 | expecting_sec_name = 1; |
| 2319 | expecting_sec_addr = 1; |
| 2320 | } |
| 2321 | else |
| 2322 | error (_("USAGE: add-symbol-file <filename> <textaddress>" |
| 2323 | " [-readnow] [-s <secname> <addr>]*")); |
| 2324 | } |
| 2325 | } |
| 2326 | |
| 2327 | /* This command takes at least two arguments. The first one is a |
| 2328 | filename, and the second is the address where this file has been |
| 2329 | loaded. Abort now if this address hasn't been provided by the |
| 2330 | user. */ |
| 2331 | if (section_index < 1) |
| 2332 | error (_("The address where %s has been loaded is missing"), filename); |
| 2333 | |
| 2334 | /* Print the prompt for the query below. And save the arguments into |
| 2335 | a sect_addr_info structure to be passed around to other |
| 2336 | functions. We have to split this up into separate print |
| 2337 | statements because hex_string returns a local static |
| 2338 | string. */ |
| 2339 | |
| 2340 | printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename); |
| 2341 | section_addrs = alloc_section_addr_info (section_index); |
| 2342 | make_cleanup (xfree, section_addrs); |
| 2343 | for (i = 0; i < section_index; i++) |
| 2344 | { |
| 2345 | CORE_ADDR addr; |
| 2346 | char *val = sect_opts[i].value; |
| 2347 | char *sec = sect_opts[i].name; |
| 2348 | |
| 2349 | addr = parse_and_eval_address (val); |
| 2350 | |
| 2351 | /* Here we store the section offsets in the order they were |
| 2352 | entered on the command line. */ |
| 2353 | section_addrs->other[sec_num].name = sec; |
| 2354 | section_addrs->other[sec_num].addr = addr; |
| 2355 | printf_unfiltered ("\t%s_addr = %s\n", sec, |
| 2356 | paddress (gdbarch, addr)); |
| 2357 | sec_num++; |
| 2358 | |
| 2359 | /* The object's sections are initialized when a |
| 2360 | call is made to build_objfile_section_table (objfile). |
| 2361 | This happens in reread_symbols. |
| 2362 | At this point, we don't know what file type this is, |
| 2363 | so we can't determine what section names are valid. */ |
| 2364 | } |
| 2365 | section_addrs->num_sections = sec_num; |
| 2366 | |
| 2367 | if (from_tty && (!query ("%s", ""))) |
| 2368 | error (_("Not confirmed.")); |
| 2369 | |
| 2370 | objf = symbol_file_add (filename, from_tty ? SYMFILE_VERBOSE : 0, |
| 2371 | section_addrs, flags); |
| 2372 | |
| 2373 | add_target_sections_of_objfile (objf); |
| 2374 | |
| 2375 | /* Getting new symbols may change our opinion about what is |
| 2376 | frameless. */ |
| 2377 | reinit_frame_cache (); |
| 2378 | do_cleanups (my_cleanups); |
| 2379 | } |
| 2380 | \f |
| 2381 | |
| 2382 | /* This function removes a symbol file that was added via add-symbol-file. */ |
| 2383 | |
| 2384 | static void |
| 2385 | remove_symbol_file_command (char *args, int from_tty) |
| 2386 | { |
| 2387 | char **argv; |
| 2388 | struct objfile *objf = NULL; |
| 2389 | struct cleanup *my_cleanups; |
| 2390 | struct program_space *pspace = current_program_space; |
| 2391 | struct gdbarch *gdbarch = get_current_arch (); |
| 2392 | |
| 2393 | dont_repeat (); |
| 2394 | |
| 2395 | if (args == NULL) |
| 2396 | error (_("remove-symbol-file: no symbol file provided")); |
| 2397 | |
| 2398 | my_cleanups = make_cleanup (null_cleanup, NULL); |
| 2399 | |
| 2400 | argv = gdb_buildargv (args); |
| 2401 | |
| 2402 | if (strcmp (argv[0], "-a") == 0) |
| 2403 | { |
| 2404 | /* Interpret the next argument as an address. */ |
| 2405 | CORE_ADDR addr; |
| 2406 | |
| 2407 | if (argv[1] == NULL) |
| 2408 | error (_("Missing address argument")); |
| 2409 | |
| 2410 | if (argv[2] != NULL) |
| 2411 | error (_("Junk after %s"), argv[1]); |
| 2412 | |
| 2413 | addr = parse_and_eval_address (argv[1]); |
| 2414 | |
| 2415 | ALL_OBJFILES (objf) |
| 2416 | { |
| 2417 | if ((objf->flags & OBJF_USERLOADED) != 0 |
| 2418 | && (objf->flags & OBJF_SHARED) != 0 |
| 2419 | && objf->pspace == pspace && is_addr_in_objfile (addr, objf)) |
| 2420 | break; |
| 2421 | } |
| 2422 | } |
| 2423 | else if (argv[0] != NULL) |
| 2424 | { |
| 2425 | /* Interpret the current argument as a file name. */ |
| 2426 | char *filename; |
| 2427 | |
| 2428 | if (argv[1] != NULL) |
| 2429 | error (_("Junk after %s"), argv[0]); |
| 2430 | |
| 2431 | filename = tilde_expand (argv[0]); |
| 2432 | make_cleanup (xfree, filename); |
| 2433 | |
| 2434 | ALL_OBJFILES (objf) |
| 2435 | { |
| 2436 | if ((objf->flags & OBJF_USERLOADED) != 0 |
| 2437 | && (objf->flags & OBJF_SHARED) != 0 |
| 2438 | && objf->pspace == pspace |
| 2439 | && filename_cmp (filename, objfile_name (objf)) == 0) |
| 2440 | break; |
| 2441 | } |
| 2442 | } |
| 2443 | |
| 2444 | if (objf == NULL) |
| 2445 | error (_("No symbol file found")); |
| 2446 | |
| 2447 | if (from_tty |
| 2448 | && !query (_("Remove symbol table from file \"%s\"? "), |
| 2449 | objfile_name (objf))) |
| 2450 | error (_("Not confirmed.")); |
| 2451 | |
| 2452 | free_objfile (objf); |
| 2453 | clear_symtab_users (0); |
| 2454 | |
| 2455 | do_cleanups (my_cleanups); |
| 2456 | } |
| 2457 | |
| 2458 | typedef struct objfile *objfilep; |
| 2459 | |
| 2460 | DEF_VEC_P (objfilep); |
| 2461 | |
| 2462 | /* Re-read symbols if a symbol-file has changed. */ |
| 2463 | |
| 2464 | void |
| 2465 | reread_symbols (void) |
| 2466 | { |
| 2467 | struct objfile *objfile; |
| 2468 | long new_modtime; |
| 2469 | struct stat new_statbuf; |
| 2470 | int res; |
| 2471 | VEC (objfilep) *new_objfiles = NULL; |
| 2472 | struct cleanup *all_cleanups; |
| 2473 | |
| 2474 | all_cleanups = make_cleanup (VEC_cleanup (objfilep), &new_objfiles); |
| 2475 | |
| 2476 | /* With the addition of shared libraries, this should be modified, |
| 2477 | the load time should be saved in the partial symbol tables, since |
| 2478 | different tables may come from different source files. FIXME. |
| 2479 | This routine should then walk down each partial symbol table |
| 2480 | and see if the symbol table that it originates from has been changed. */ |
| 2481 | |
| 2482 | for (objfile = object_files; objfile; objfile = objfile->next) |
| 2483 | { |
| 2484 | if (objfile->obfd == NULL) |
| 2485 | continue; |
| 2486 | |
| 2487 | /* Separate debug objfiles are handled in the main objfile. */ |
| 2488 | if (objfile->separate_debug_objfile_backlink) |
| 2489 | continue; |
| 2490 | |
| 2491 | /* If this object is from an archive (what you usually create with |
| 2492 | `ar', often called a `static library' on most systems, though |
| 2493 | a `shared library' on AIX is also an archive), then you should |
| 2494 | stat on the archive name, not member name. */ |
| 2495 | if (objfile->obfd->my_archive) |
| 2496 | res = stat (objfile->obfd->my_archive->filename, &new_statbuf); |
| 2497 | else |
| 2498 | res = stat (objfile_name (objfile), &new_statbuf); |
| 2499 | if (res != 0) |
| 2500 | { |
| 2501 | /* FIXME, should use print_sys_errmsg but it's not filtered. */ |
| 2502 | printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"), |
| 2503 | objfile_name (objfile)); |
| 2504 | continue; |
| 2505 | } |
| 2506 | new_modtime = new_statbuf.st_mtime; |
| 2507 | if (new_modtime != objfile->mtime) |
| 2508 | { |
| 2509 | struct cleanup *old_cleanups; |
| 2510 | struct section_offsets *offsets; |
| 2511 | int num_offsets; |
| 2512 | char *original_name; |
| 2513 | |
| 2514 | printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"), |
| 2515 | objfile_name (objfile)); |
| 2516 | |
| 2517 | /* There are various functions like symbol_file_add, |
| 2518 | symfile_bfd_open, syms_from_objfile, etc., which might |
| 2519 | appear to do what we want. But they have various other |
| 2520 | effects which we *don't* want. So we just do stuff |
| 2521 | ourselves. We don't worry about mapped files (for one thing, |
| 2522 | any mapped file will be out of date). */ |
| 2523 | |
| 2524 | /* If we get an error, blow away this objfile (not sure if |
| 2525 | that is the correct response for things like shared |
| 2526 | libraries). */ |
| 2527 | old_cleanups = make_cleanup_free_objfile (objfile); |
| 2528 | /* We need to do this whenever any symbols go away. */ |
| 2529 | make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/); |
| 2530 | |
| 2531 | if (exec_bfd != NULL |
| 2532 | && filename_cmp (bfd_get_filename (objfile->obfd), |
| 2533 | bfd_get_filename (exec_bfd)) == 0) |
| 2534 | { |
| 2535 | /* Reload EXEC_BFD without asking anything. */ |
| 2536 | |
| 2537 | exec_file_attach (bfd_get_filename (objfile->obfd), 0); |
| 2538 | } |
| 2539 | |
| 2540 | /* Keep the calls order approx. the same as in free_objfile. */ |
| 2541 | |
| 2542 | /* Free the separate debug objfiles. It will be |
| 2543 | automatically recreated by sym_read. */ |
| 2544 | free_objfile_separate_debug (objfile); |
| 2545 | |
| 2546 | /* Remove any references to this objfile in the global |
| 2547 | value lists. */ |
| 2548 | preserve_values (objfile); |
| 2549 | |
| 2550 | /* Nuke all the state that we will re-read. Much of the following |
| 2551 | code which sets things to NULL really is necessary to tell |
| 2552 | other parts of GDB that there is nothing currently there. |
| 2553 | |
| 2554 | Try to keep the freeing order compatible with free_objfile. */ |
| 2555 | |
| 2556 | if (objfile->sf != NULL) |
| 2557 | { |
| 2558 | (*objfile->sf->sym_finish) (objfile); |
| 2559 | } |
| 2560 | |
| 2561 | clear_objfile_data (objfile); |
| 2562 | |
| 2563 | /* Clean up any state BFD has sitting around. */ |
| 2564 | { |
| 2565 | struct bfd *obfd = objfile->obfd; |
| 2566 | char *obfd_filename; |
| 2567 | |
| 2568 | obfd_filename = bfd_get_filename (objfile->obfd); |
| 2569 | /* Open the new BFD before freeing the old one, so that |
| 2570 | the filename remains live. */ |
| 2571 | objfile->obfd = gdb_bfd_open (obfd_filename, gnutarget, -1); |
| 2572 | if (objfile->obfd == NULL) |
| 2573 | { |
| 2574 | /* We have to make a cleanup and error here, rather |
| 2575 | than erroring later, because once we unref OBFD, |
| 2576 | OBFD_FILENAME will be freed. */ |
| 2577 | make_cleanup_bfd_unref (obfd); |
| 2578 | error (_("Can't open %s to read symbols."), obfd_filename); |
| 2579 | } |
| 2580 | gdb_bfd_unref (obfd); |
| 2581 | } |
| 2582 | |
| 2583 | original_name = xstrdup (objfile->original_name); |
| 2584 | make_cleanup (xfree, original_name); |
| 2585 | |
| 2586 | /* bfd_openr sets cacheable to true, which is what we want. */ |
| 2587 | if (!bfd_check_format (objfile->obfd, bfd_object)) |
| 2588 | error (_("Can't read symbols from %s: %s."), objfile_name (objfile), |
| 2589 | bfd_errmsg (bfd_get_error ())); |
| 2590 | |
| 2591 | /* Save the offsets, we will nuke them with the rest of the |
| 2592 | objfile_obstack. */ |
| 2593 | num_offsets = objfile->num_sections; |
| 2594 | offsets = ((struct section_offsets *) |
| 2595 | alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets))); |
| 2596 | memcpy (offsets, objfile->section_offsets, |
| 2597 | SIZEOF_N_SECTION_OFFSETS (num_offsets)); |
| 2598 | |
| 2599 | /* FIXME: Do we have to free a whole linked list, or is this |
| 2600 | enough? */ |
| 2601 | if (objfile->global_psymbols.list) |
| 2602 | xfree (objfile->global_psymbols.list); |
| 2603 | memset (&objfile->global_psymbols, 0, |
| 2604 | sizeof (objfile->global_psymbols)); |
| 2605 | if (objfile->static_psymbols.list) |
| 2606 | xfree (objfile->static_psymbols.list); |
| 2607 | memset (&objfile->static_psymbols, 0, |
| 2608 | sizeof (objfile->static_psymbols)); |
| 2609 | |
| 2610 | /* Free the obstacks for non-reusable objfiles. */ |
| 2611 | psymbol_bcache_free (objfile->psymbol_cache); |
| 2612 | objfile->psymbol_cache = psymbol_bcache_init (); |
| 2613 | obstack_free (&objfile->objfile_obstack, 0); |
| 2614 | objfile->sections = NULL; |
| 2615 | objfile->compunit_symtabs = NULL; |
| 2616 | objfile->psymtabs = NULL; |
| 2617 | objfile->psymtabs_addrmap = NULL; |
| 2618 | objfile->free_psymtabs = NULL; |
| 2619 | objfile->template_symbols = NULL; |
| 2620 | |
| 2621 | /* obstack_init also initializes the obstack so it is |
| 2622 | empty. We could use obstack_specify_allocation but |
| 2623 | gdb_obstack.h specifies the alloc/dealloc functions. */ |
| 2624 | obstack_init (&objfile->objfile_obstack); |
| 2625 | |
| 2626 | /* set_objfile_per_bfd potentially allocates the per-bfd |
| 2627 | data on the objfile's obstack (if sharing data across |
| 2628 | multiple users is not possible), so it's important to |
| 2629 | do it *after* the obstack has been initialized. */ |
| 2630 | set_objfile_per_bfd (objfile); |
| 2631 | |
| 2632 | objfile->original_name = obstack_copy0 (&objfile->objfile_obstack, |
| 2633 | original_name, |
| 2634 | strlen (original_name)); |
| 2635 | |
| 2636 | /* Reset the sym_fns pointer. The ELF reader can change it |
| 2637 | based on whether .gdb_index is present, and we need it to |
| 2638 | start over. PR symtab/15885 */ |
| 2639 | objfile_set_sym_fns (objfile, find_sym_fns (objfile->obfd)); |
| 2640 | |
| 2641 | build_objfile_section_table (objfile); |
| 2642 | terminate_minimal_symbol_table (objfile); |
| 2643 | |
| 2644 | /* We use the same section offsets as from last time. I'm not |
| 2645 | sure whether that is always correct for shared libraries. */ |
| 2646 | objfile->section_offsets = (struct section_offsets *) |
| 2647 | obstack_alloc (&objfile->objfile_obstack, |
| 2648 | SIZEOF_N_SECTION_OFFSETS (num_offsets)); |
| 2649 | memcpy (objfile->section_offsets, offsets, |
| 2650 | SIZEOF_N_SECTION_OFFSETS (num_offsets)); |
| 2651 | objfile->num_sections = num_offsets; |
| 2652 | |
| 2653 | /* What the hell is sym_new_init for, anyway? The concept of |
| 2654 | distinguishing between the main file and additional files |
| 2655 | in this way seems rather dubious. */ |
| 2656 | if (objfile == symfile_objfile) |
| 2657 | { |
| 2658 | (*objfile->sf->sym_new_init) (objfile); |
| 2659 | } |
| 2660 | |
| 2661 | (*objfile->sf->sym_init) (objfile); |
| 2662 | clear_complaints (&symfile_complaints, 1, 1); |
| 2663 | |
| 2664 | objfile->flags &= ~OBJF_PSYMTABS_READ; |
| 2665 | read_symbols (objfile, 0); |
| 2666 | |
| 2667 | if (!objfile_has_symbols (objfile)) |
| 2668 | { |
| 2669 | wrap_here (""); |
| 2670 | printf_unfiltered (_("(no debugging symbols found)\n")); |
| 2671 | wrap_here (""); |
| 2672 | } |
| 2673 | |
| 2674 | /* We're done reading the symbol file; finish off complaints. */ |
| 2675 | clear_complaints (&symfile_complaints, 0, 1); |
| 2676 | |
| 2677 | /* Getting new symbols may change our opinion about what is |
| 2678 | frameless. */ |
| 2679 | |
| 2680 | reinit_frame_cache (); |
| 2681 | |
| 2682 | /* Discard cleanups as symbol reading was successful. */ |
| 2683 | discard_cleanups (old_cleanups); |
| 2684 | |
| 2685 | /* If the mtime has changed between the time we set new_modtime |
| 2686 | and now, we *want* this to be out of date, so don't call stat |
| 2687 | again now. */ |
| 2688 | objfile->mtime = new_modtime; |
| 2689 | init_entry_point_info (objfile); |
| 2690 | |
| 2691 | VEC_safe_push (objfilep, new_objfiles, objfile); |
| 2692 | } |
| 2693 | } |
| 2694 | |
| 2695 | if (new_objfiles) |
| 2696 | { |
| 2697 | int ix; |
| 2698 | |
| 2699 | /* Notify objfiles that we've modified objfile sections. */ |
| 2700 | objfiles_changed (); |
| 2701 | |
| 2702 | clear_symtab_users (0); |
| 2703 | |
| 2704 | /* clear_objfile_data for each objfile was called before freeing it and |
| 2705 | observer_notify_new_objfile (NULL) has been called by |
| 2706 | clear_symtab_users above. Notify the new files now. */ |
| 2707 | for (ix = 0; VEC_iterate (objfilep, new_objfiles, ix, objfile); ix++) |
| 2708 | observer_notify_new_objfile (objfile); |
| 2709 | |
| 2710 | /* At least one objfile has changed, so we can consider that |
| 2711 | the executable we're debugging has changed too. */ |
| 2712 | observer_notify_executable_changed (); |
| 2713 | } |
| 2714 | |
| 2715 | do_cleanups (all_cleanups); |
| 2716 | } |
| 2717 | \f |
| 2718 | |
| 2719 | typedef struct |
| 2720 | { |
| 2721 | char *ext; |
| 2722 | enum language lang; |
| 2723 | } |
| 2724 | filename_language; |
| 2725 | |
| 2726 | static filename_language *filename_language_table; |
| 2727 | static int fl_table_size, fl_table_next; |
| 2728 | |
| 2729 | static void |
| 2730 | add_filename_language (char *ext, enum language lang) |
| 2731 | { |
| 2732 | if (fl_table_next >= fl_table_size) |
| 2733 | { |
| 2734 | fl_table_size += 10; |
| 2735 | filename_language_table = |
| 2736 | xrealloc (filename_language_table, |
| 2737 | fl_table_size * sizeof (*filename_language_table)); |
| 2738 | } |
| 2739 | |
| 2740 | filename_language_table[fl_table_next].ext = xstrdup (ext); |
| 2741 | filename_language_table[fl_table_next].lang = lang; |
| 2742 | fl_table_next++; |
| 2743 | } |
| 2744 | |
| 2745 | static char *ext_args; |
| 2746 | static void |
| 2747 | show_ext_args (struct ui_file *file, int from_tty, |
| 2748 | struct cmd_list_element *c, const char *value) |
| 2749 | { |
| 2750 | fprintf_filtered (file, |
| 2751 | _("Mapping between filename extension " |
| 2752 | "and source language is \"%s\".\n"), |
| 2753 | value); |
| 2754 | } |
| 2755 | |
| 2756 | static void |
| 2757 | set_ext_lang_command (char *args, int from_tty, struct cmd_list_element *e) |
| 2758 | { |
| 2759 | int i; |
| 2760 | char *cp = ext_args; |
| 2761 | enum language lang; |
| 2762 | |
| 2763 | /* First arg is filename extension, starting with '.' */ |
| 2764 | if (*cp != '.') |
| 2765 | error (_("'%s': Filename extension must begin with '.'"), ext_args); |
| 2766 | |
| 2767 | /* Find end of first arg. */ |
| 2768 | while (*cp && !isspace (*cp)) |
| 2769 | cp++; |
| 2770 | |
| 2771 | if (*cp == '\0') |
| 2772 | error (_("'%s': two arguments required -- " |
| 2773 | "filename extension and language"), |
| 2774 | ext_args); |
| 2775 | |
| 2776 | /* Null-terminate first arg. */ |
| 2777 | *cp++ = '\0'; |
| 2778 | |
| 2779 | /* Find beginning of second arg, which should be a source language. */ |
| 2780 | cp = skip_spaces (cp); |
| 2781 | |
| 2782 | if (*cp == '\0') |
| 2783 | error (_("'%s': two arguments required -- " |
| 2784 | "filename extension and language"), |
| 2785 | ext_args); |
| 2786 | |
| 2787 | /* Lookup the language from among those we know. */ |
| 2788 | lang = language_enum (cp); |
| 2789 | |
| 2790 | /* Now lookup the filename extension: do we already know it? */ |
| 2791 | for (i = 0; i < fl_table_next; i++) |
| 2792 | if (0 == strcmp (ext_args, filename_language_table[i].ext)) |
| 2793 | break; |
| 2794 | |
| 2795 | if (i >= fl_table_next) |
| 2796 | { |
| 2797 | /* New file extension. */ |
| 2798 | add_filename_language (ext_args, lang); |
| 2799 | } |
| 2800 | else |
| 2801 | { |
| 2802 | /* Redefining a previously known filename extension. */ |
| 2803 | |
| 2804 | /* if (from_tty) */ |
| 2805 | /* query ("Really make files of type %s '%s'?", */ |
| 2806 | /* ext_args, language_str (lang)); */ |
| 2807 | |
| 2808 | xfree (filename_language_table[i].ext); |
| 2809 | filename_language_table[i].ext = xstrdup (ext_args); |
| 2810 | filename_language_table[i].lang = lang; |
| 2811 | } |
| 2812 | } |
| 2813 | |
| 2814 | static void |
| 2815 | info_ext_lang_command (char *args, int from_tty) |
| 2816 | { |
| 2817 | int i; |
| 2818 | |
| 2819 | printf_filtered (_("Filename extensions and the languages they represent:")); |
| 2820 | printf_filtered ("\n\n"); |
| 2821 | for (i = 0; i < fl_table_next; i++) |
| 2822 | printf_filtered ("\t%s\t- %s\n", |
| 2823 | filename_language_table[i].ext, |
| 2824 | language_str (filename_language_table[i].lang)); |
| 2825 | } |
| 2826 | |
| 2827 | static void |
| 2828 | init_filename_language_table (void) |
| 2829 | { |
| 2830 | if (fl_table_size == 0) /* Protect against repetition. */ |
| 2831 | { |
| 2832 | fl_table_size = 20; |
| 2833 | fl_table_next = 0; |
| 2834 | filename_language_table = XNEWVEC (filename_language, fl_table_size); |
| 2835 | |
| 2836 | add_filename_language (".c", language_c); |
| 2837 | add_filename_language (".d", language_d); |
| 2838 | add_filename_language (".C", language_cplus); |
| 2839 | add_filename_language (".cc", language_cplus); |
| 2840 | add_filename_language (".cp", language_cplus); |
| 2841 | add_filename_language (".cpp", language_cplus); |
| 2842 | add_filename_language (".cxx", language_cplus); |
| 2843 | add_filename_language (".c++", language_cplus); |
| 2844 | add_filename_language (".java", language_java); |
| 2845 | add_filename_language (".class", language_java); |
| 2846 | add_filename_language (".m", language_objc); |
| 2847 | add_filename_language (".f", language_fortran); |
| 2848 | add_filename_language (".F", language_fortran); |
| 2849 | add_filename_language (".for", language_fortran); |
| 2850 | add_filename_language (".FOR", language_fortran); |
| 2851 | add_filename_language (".ftn", language_fortran); |
| 2852 | add_filename_language (".FTN", language_fortran); |
| 2853 | add_filename_language (".fpp", language_fortran); |
| 2854 | add_filename_language (".FPP", language_fortran); |
| 2855 | add_filename_language (".f90", language_fortran); |
| 2856 | add_filename_language (".F90", language_fortran); |
| 2857 | add_filename_language (".f95", language_fortran); |
| 2858 | add_filename_language (".F95", language_fortran); |
| 2859 | add_filename_language (".f03", language_fortran); |
| 2860 | add_filename_language (".F03", language_fortran); |
| 2861 | add_filename_language (".f08", language_fortran); |
| 2862 | add_filename_language (".F08", language_fortran); |
| 2863 | add_filename_language (".s", language_asm); |
| 2864 | add_filename_language (".sx", language_asm); |
| 2865 | add_filename_language (".S", language_asm); |
| 2866 | add_filename_language (".pas", language_pascal); |
| 2867 | add_filename_language (".p", language_pascal); |
| 2868 | add_filename_language (".pp", language_pascal); |
| 2869 | add_filename_language (".adb", language_ada); |
| 2870 | add_filename_language (".ads", language_ada); |
| 2871 | add_filename_language (".a", language_ada); |
| 2872 | add_filename_language (".ada", language_ada); |
| 2873 | add_filename_language (".dg", language_ada); |
| 2874 | } |
| 2875 | } |
| 2876 | |
| 2877 | enum language |
| 2878 | deduce_language_from_filename (const char *filename) |
| 2879 | { |
| 2880 | int i; |
| 2881 | char *cp; |
| 2882 | |
| 2883 | if (filename != NULL) |
| 2884 | if ((cp = strrchr (filename, '.')) != NULL) |
| 2885 | for (i = 0; i < fl_table_next; i++) |
| 2886 | if (strcmp (cp, filename_language_table[i].ext) == 0) |
| 2887 | return filename_language_table[i].lang; |
| 2888 | |
| 2889 | return language_unknown; |
| 2890 | } |
| 2891 | \f |
| 2892 | /* Allocate and initialize a new symbol table. |
| 2893 | CUST is from the result of allocate_compunit_symtab. */ |
| 2894 | |
| 2895 | struct symtab * |
| 2896 | allocate_symtab (struct compunit_symtab *cust, const char *filename) |
| 2897 | { |
| 2898 | struct objfile *objfile = cust->objfile; |
| 2899 | struct symtab *symtab |
| 2900 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct symtab); |
| 2901 | |
| 2902 | symtab->filename = bcache (filename, strlen (filename) + 1, |
| 2903 | objfile->per_bfd->filename_cache); |
| 2904 | symtab->fullname = NULL; |
| 2905 | symtab->language = deduce_language_from_filename (filename); |
| 2906 | |
| 2907 | /* This can be very verbose with lots of headers. |
| 2908 | Only print at higher debug levels. */ |
| 2909 | if (symtab_create_debug >= 2) |
| 2910 | { |
| 2911 | /* Be a bit clever with debugging messages, and don't print objfile |
| 2912 | every time, only when it changes. */ |
| 2913 | static char *last_objfile_name = NULL; |
| 2914 | |
| 2915 | if (last_objfile_name == NULL |
| 2916 | || strcmp (last_objfile_name, objfile_name (objfile)) != 0) |
| 2917 | { |
| 2918 | xfree (last_objfile_name); |
| 2919 | last_objfile_name = xstrdup (objfile_name (objfile)); |
| 2920 | fprintf_unfiltered (gdb_stdlog, |
| 2921 | "Creating one or more symtabs for objfile %s ...\n", |
| 2922 | last_objfile_name); |
| 2923 | } |
| 2924 | fprintf_unfiltered (gdb_stdlog, |
| 2925 | "Created symtab %s for module %s.\n", |
| 2926 | host_address_to_string (symtab), filename); |
| 2927 | } |
| 2928 | |
| 2929 | /* Add it to CUST's list of symtabs. */ |
| 2930 | if (cust->filetabs == NULL) |
| 2931 | { |
| 2932 | cust->filetabs = symtab; |
| 2933 | cust->last_filetab = symtab; |
| 2934 | } |
| 2935 | else |
| 2936 | { |
| 2937 | cust->last_filetab->next = symtab; |
| 2938 | cust->last_filetab = symtab; |
| 2939 | } |
| 2940 | |
| 2941 | /* Backlink to the containing compunit symtab. */ |
| 2942 | symtab->compunit_symtab = cust; |
| 2943 | |
| 2944 | return symtab; |
| 2945 | } |
| 2946 | |
| 2947 | /* Allocate and initialize a new compunit. |
| 2948 | NAME is the name of the main source file, if there is one, or some |
| 2949 | descriptive text if there are no source files. */ |
| 2950 | |
| 2951 | struct compunit_symtab * |
| 2952 | allocate_compunit_symtab (struct objfile *objfile, const char *name) |
| 2953 | { |
| 2954 | struct compunit_symtab *cu = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 2955 | struct compunit_symtab); |
| 2956 | const char *saved_name; |
| 2957 | |
| 2958 | cu->objfile = objfile; |
| 2959 | |
| 2960 | /* The name we record here is only for display/debugging purposes. |
| 2961 | Just save the basename to avoid path issues (too long for display, |
| 2962 | relative vs absolute, etc.). */ |
| 2963 | saved_name = lbasename (name); |
| 2964 | cu->name = obstack_copy0 (&objfile->objfile_obstack, saved_name, |
| 2965 | strlen (saved_name)); |
| 2966 | |
| 2967 | COMPUNIT_DEBUGFORMAT (cu) = "unknown"; |
| 2968 | |
| 2969 | if (symtab_create_debug) |
| 2970 | { |
| 2971 | fprintf_unfiltered (gdb_stdlog, |
| 2972 | "Created compunit symtab %s for %s.\n", |
| 2973 | host_address_to_string (cu), |
| 2974 | cu->name); |
| 2975 | } |
| 2976 | |
| 2977 | return cu; |
| 2978 | } |
| 2979 | |
| 2980 | /* Hook CU to the objfile it comes from. */ |
| 2981 | |
| 2982 | void |
| 2983 | add_compunit_symtab_to_objfile (struct compunit_symtab *cu) |
| 2984 | { |
| 2985 | cu->next = cu->objfile->compunit_symtabs; |
| 2986 | cu->objfile->compunit_symtabs = cu; |
| 2987 | } |
| 2988 | \f |
| 2989 | |
| 2990 | /* Reset all data structures in gdb which may contain references to symbol |
| 2991 | table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */ |
| 2992 | |
| 2993 | void |
| 2994 | clear_symtab_users (int add_flags) |
| 2995 | { |
| 2996 | /* Someday, we should do better than this, by only blowing away |
| 2997 | the things that really need to be blown. */ |
| 2998 | |
| 2999 | /* Clear the "current" symtab first, because it is no longer valid. |
| 3000 | breakpoint_re_set may try to access the current symtab. */ |
| 3001 | clear_current_source_symtab_and_line (); |
| 3002 | |
| 3003 | clear_displays (); |
| 3004 | clear_last_displayed_sal (); |
| 3005 | clear_pc_function_cache (); |
| 3006 | observer_notify_new_objfile (NULL); |
| 3007 | |
| 3008 | /* Clear globals which might have pointed into a removed objfile. |
| 3009 | FIXME: It's not clear which of these are supposed to persist |
| 3010 | between expressions and which ought to be reset each time. */ |
| 3011 | expression_context_block = NULL; |
| 3012 | innermost_block = NULL; |
| 3013 | |
| 3014 | /* Varobj may refer to old symbols, perform a cleanup. */ |
| 3015 | varobj_invalidate (); |
| 3016 | |
| 3017 | /* Now that the various caches have been cleared, we can re_set |
| 3018 | our breakpoints without risking it using stale data. */ |
| 3019 | if ((add_flags & SYMFILE_DEFER_BP_RESET) == 0) |
| 3020 | breakpoint_re_set (); |
| 3021 | } |
| 3022 | |
| 3023 | static void |
| 3024 | clear_symtab_users_cleanup (void *ignore) |
| 3025 | { |
| 3026 | clear_symtab_users (0); |
| 3027 | } |
| 3028 | \f |
| 3029 | /* OVERLAYS: |
| 3030 | The following code implements an abstraction for debugging overlay sections. |
| 3031 | |
| 3032 | The target model is as follows: |
| 3033 | 1) The gnu linker will permit multiple sections to be mapped into the |
| 3034 | same VMA, each with its own unique LMA (or load address). |
| 3035 | 2) It is assumed that some runtime mechanism exists for mapping the |
| 3036 | sections, one by one, from the load address into the VMA address. |
| 3037 | 3) This code provides a mechanism for gdb to keep track of which |
| 3038 | sections should be considered to be mapped from the VMA to the LMA. |
| 3039 | This information is used for symbol lookup, and memory read/write. |
| 3040 | For instance, if a section has been mapped then its contents |
| 3041 | should be read from the VMA, otherwise from the LMA. |
| 3042 | |
| 3043 | Two levels of debugger support for overlays are available. One is |
| 3044 | "manual", in which the debugger relies on the user to tell it which |
| 3045 | overlays are currently mapped. This level of support is |
| 3046 | implemented entirely in the core debugger, and the information about |
| 3047 | whether a section is mapped is kept in the objfile->obj_section table. |
| 3048 | |
| 3049 | The second level of support is "automatic", and is only available if |
| 3050 | the target-specific code provides functionality to read the target's |
| 3051 | overlay mapping table, and translate its contents for the debugger |
| 3052 | (by updating the mapped state information in the obj_section tables). |
| 3053 | |
| 3054 | The interface is as follows: |
| 3055 | User commands: |
| 3056 | overlay map <name> -- tell gdb to consider this section mapped |
| 3057 | overlay unmap <name> -- tell gdb to consider this section unmapped |
| 3058 | overlay list -- list the sections that GDB thinks are mapped |
| 3059 | overlay read-target -- get the target's state of what's mapped |
| 3060 | overlay off/manual/auto -- set overlay debugging state |
| 3061 | Functional interface: |
| 3062 | find_pc_mapped_section(pc): if the pc is in the range of a mapped |
| 3063 | section, return that section. |
| 3064 | find_pc_overlay(pc): find any overlay section that contains |
| 3065 | the pc, either in its VMA or its LMA |
| 3066 | section_is_mapped(sect): true if overlay is marked as mapped |
| 3067 | section_is_overlay(sect): true if section's VMA != LMA |
| 3068 | pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA |
| 3069 | pc_in_unmapped_range(...): true if pc belongs to section's LMA |
| 3070 | sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap |
| 3071 | overlay_mapped_address(...): map an address from section's LMA to VMA |
| 3072 | overlay_unmapped_address(...): map an address from section's VMA to LMA |
| 3073 | symbol_overlayed_address(...): Return a "current" address for symbol: |
| 3074 | either in VMA or LMA depending on whether |
| 3075 | the symbol's section is currently mapped. */ |
| 3076 | |
| 3077 | /* Overlay debugging state: */ |
| 3078 | |
| 3079 | enum overlay_debugging_state overlay_debugging = ovly_off; |
| 3080 | int overlay_cache_invalid = 0; /* True if need to refresh mapped state. */ |
| 3081 | |
| 3082 | /* Function: section_is_overlay (SECTION) |
| 3083 | Returns true if SECTION has VMA not equal to LMA, ie. |
| 3084 | SECTION is loaded at an address different from where it will "run". */ |
| 3085 | |
| 3086 | int |
| 3087 | section_is_overlay (struct obj_section *section) |
| 3088 | { |
| 3089 | if (overlay_debugging && section) |
| 3090 | { |
| 3091 | bfd *abfd = section->objfile->obfd; |
| 3092 | asection *bfd_section = section->the_bfd_section; |
| 3093 | |
| 3094 | if (bfd_section_lma (abfd, bfd_section) != 0 |
| 3095 | && bfd_section_lma (abfd, bfd_section) |
| 3096 | != bfd_section_vma (abfd, bfd_section)) |
| 3097 | return 1; |
| 3098 | } |
| 3099 | |
| 3100 | return 0; |
| 3101 | } |
| 3102 | |
| 3103 | /* Function: overlay_invalidate_all (void) |
| 3104 | Invalidate the mapped state of all overlay sections (mark it as stale). */ |
| 3105 | |
| 3106 | static void |
| 3107 | overlay_invalidate_all (void) |
| 3108 | { |
| 3109 | struct objfile *objfile; |
| 3110 | struct obj_section *sect; |
| 3111 | |
| 3112 | ALL_OBJSECTIONS (objfile, sect) |
| 3113 | if (section_is_overlay (sect)) |
| 3114 | sect->ovly_mapped = -1; |
| 3115 | } |
| 3116 | |
| 3117 | /* Function: section_is_mapped (SECTION) |
| 3118 | Returns true if section is an overlay, and is currently mapped. |
| 3119 | |
| 3120 | Access to the ovly_mapped flag is restricted to this function, so |
| 3121 | that we can do automatic update. If the global flag |
| 3122 | OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call |
| 3123 | overlay_invalidate_all. If the mapped state of the particular |
| 3124 | section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */ |
| 3125 | |
| 3126 | int |
| 3127 | section_is_mapped (struct obj_section *osect) |
| 3128 | { |
| 3129 | struct gdbarch *gdbarch; |
| 3130 | |
| 3131 | if (osect == 0 || !section_is_overlay (osect)) |
| 3132 | return 0; |
| 3133 | |
| 3134 | switch (overlay_debugging) |
| 3135 | { |
| 3136 | default: |
| 3137 | case ovly_off: |
| 3138 | return 0; /* overlay debugging off */ |
| 3139 | case ovly_auto: /* overlay debugging automatic */ |
| 3140 | /* Unles there is a gdbarch_overlay_update function, |
| 3141 | there's really nothing useful to do here (can't really go auto). */ |
| 3142 | gdbarch = get_objfile_arch (osect->objfile); |
| 3143 | if (gdbarch_overlay_update_p (gdbarch)) |
| 3144 | { |
| 3145 | if (overlay_cache_invalid) |
| 3146 | { |
| 3147 | overlay_invalidate_all (); |
| 3148 | overlay_cache_invalid = 0; |
| 3149 | } |
| 3150 | if (osect->ovly_mapped == -1) |
| 3151 | gdbarch_overlay_update (gdbarch, osect); |
| 3152 | } |
| 3153 | /* fall thru to manual case */ |
| 3154 | case ovly_on: /* overlay debugging manual */ |
| 3155 | return osect->ovly_mapped == 1; |
| 3156 | } |
| 3157 | } |
| 3158 | |
| 3159 | /* Function: pc_in_unmapped_range |
| 3160 | If PC falls into the lma range of SECTION, return true, else false. */ |
| 3161 | |
| 3162 | CORE_ADDR |
| 3163 | pc_in_unmapped_range (CORE_ADDR pc, struct obj_section *section) |
| 3164 | { |
| 3165 | if (section_is_overlay (section)) |
| 3166 | { |
| 3167 | bfd *abfd = section->objfile->obfd; |
| 3168 | asection *bfd_section = section->the_bfd_section; |
| 3169 | |
| 3170 | /* We assume the LMA is relocated by the same offset as the VMA. */ |
| 3171 | bfd_vma size = bfd_get_section_size (bfd_section); |
| 3172 | CORE_ADDR offset = obj_section_offset (section); |
| 3173 | |
| 3174 | if (bfd_get_section_lma (abfd, bfd_section) + offset <= pc |
| 3175 | && pc < bfd_get_section_lma (abfd, bfd_section) + offset + size) |
| 3176 | return 1; |
| 3177 | } |
| 3178 | |
| 3179 | return 0; |
| 3180 | } |
| 3181 | |
| 3182 | /* Function: pc_in_mapped_range |
| 3183 | If PC falls into the vma range of SECTION, return true, else false. */ |
| 3184 | |
| 3185 | CORE_ADDR |
| 3186 | pc_in_mapped_range (CORE_ADDR pc, struct obj_section *section) |
| 3187 | { |
| 3188 | if (section_is_overlay (section)) |
| 3189 | { |
| 3190 | if (obj_section_addr (section) <= pc |
| 3191 | && pc < obj_section_endaddr (section)) |
| 3192 | return 1; |
| 3193 | } |
| 3194 | |
| 3195 | return 0; |
| 3196 | } |
| 3197 | |
| 3198 | /* Return true if the mapped ranges of sections A and B overlap, false |
| 3199 | otherwise. */ |
| 3200 | |
| 3201 | static int |
| 3202 | sections_overlap (struct obj_section *a, struct obj_section *b) |
| 3203 | { |
| 3204 | CORE_ADDR a_start = obj_section_addr (a); |
| 3205 | CORE_ADDR a_end = obj_section_endaddr (a); |
| 3206 | CORE_ADDR b_start = obj_section_addr (b); |
| 3207 | CORE_ADDR b_end = obj_section_endaddr (b); |
| 3208 | |
| 3209 | return (a_start < b_end && b_start < a_end); |
| 3210 | } |
| 3211 | |
| 3212 | /* Function: overlay_unmapped_address (PC, SECTION) |
| 3213 | Returns the address corresponding to PC in the unmapped (load) range. |
| 3214 | May be the same as PC. */ |
| 3215 | |
| 3216 | CORE_ADDR |
| 3217 | overlay_unmapped_address (CORE_ADDR pc, struct obj_section *section) |
| 3218 | { |
| 3219 | if (section_is_overlay (section) && pc_in_mapped_range (pc, section)) |
| 3220 | { |
| 3221 | bfd *abfd = section->objfile->obfd; |
| 3222 | asection *bfd_section = section->the_bfd_section; |
| 3223 | |
| 3224 | return pc + bfd_section_lma (abfd, bfd_section) |
| 3225 | - bfd_section_vma (abfd, bfd_section); |
| 3226 | } |
| 3227 | |
| 3228 | return pc; |
| 3229 | } |
| 3230 | |
| 3231 | /* Function: overlay_mapped_address (PC, SECTION) |
| 3232 | Returns the address corresponding to PC in the mapped (runtime) range. |
| 3233 | May be the same as PC. */ |
| 3234 | |
| 3235 | CORE_ADDR |
| 3236 | overlay_mapped_address (CORE_ADDR pc, struct obj_section *section) |
| 3237 | { |
| 3238 | if (section_is_overlay (section) && pc_in_unmapped_range (pc, section)) |
| 3239 | { |
| 3240 | bfd *abfd = section->objfile->obfd; |
| 3241 | asection *bfd_section = section->the_bfd_section; |
| 3242 | |
| 3243 | return pc + bfd_section_vma (abfd, bfd_section) |
| 3244 | - bfd_section_lma (abfd, bfd_section); |
| 3245 | } |
| 3246 | |
| 3247 | return pc; |
| 3248 | } |
| 3249 | |
| 3250 | /* Function: symbol_overlayed_address |
| 3251 | Return one of two addresses (relative to the VMA or to the LMA), |
| 3252 | depending on whether the section is mapped or not. */ |
| 3253 | |
| 3254 | CORE_ADDR |
| 3255 | symbol_overlayed_address (CORE_ADDR address, struct obj_section *section) |
| 3256 | { |
| 3257 | if (overlay_debugging) |
| 3258 | { |
| 3259 | /* If the symbol has no section, just return its regular address. */ |
| 3260 | if (section == 0) |
| 3261 | return address; |
| 3262 | /* If the symbol's section is not an overlay, just return its |
| 3263 | address. */ |
| 3264 | if (!section_is_overlay (section)) |
| 3265 | return address; |
| 3266 | /* If the symbol's section is mapped, just return its address. */ |
| 3267 | if (section_is_mapped (section)) |
| 3268 | return address; |
| 3269 | /* |
| 3270 | * HOWEVER: if the symbol is in an overlay section which is NOT mapped, |
| 3271 | * then return its LOADED address rather than its vma address!! |
| 3272 | */ |
| 3273 | return overlay_unmapped_address (address, section); |
| 3274 | } |
| 3275 | return address; |
| 3276 | } |
| 3277 | |
| 3278 | /* Function: find_pc_overlay (PC) |
| 3279 | Return the best-match overlay section for PC: |
| 3280 | If PC matches a mapped overlay section's VMA, return that section. |
| 3281 | Else if PC matches an unmapped section's VMA, return that section. |
| 3282 | Else if PC matches an unmapped section's LMA, return that section. */ |
| 3283 | |
| 3284 | struct obj_section * |
| 3285 | find_pc_overlay (CORE_ADDR pc) |
| 3286 | { |
| 3287 | struct objfile *objfile; |
| 3288 | struct obj_section *osect, *best_match = NULL; |
| 3289 | |
| 3290 | if (overlay_debugging) |
| 3291 | ALL_OBJSECTIONS (objfile, osect) |
| 3292 | if (section_is_overlay (osect)) |
| 3293 | { |
| 3294 | if (pc_in_mapped_range (pc, osect)) |
| 3295 | { |
| 3296 | if (section_is_mapped (osect)) |
| 3297 | return osect; |
| 3298 | else |
| 3299 | best_match = osect; |
| 3300 | } |
| 3301 | else if (pc_in_unmapped_range (pc, osect)) |
| 3302 | best_match = osect; |
| 3303 | } |
| 3304 | return best_match; |
| 3305 | } |
| 3306 | |
| 3307 | /* Function: find_pc_mapped_section (PC) |
| 3308 | If PC falls into the VMA address range of an overlay section that is |
| 3309 | currently marked as MAPPED, return that section. Else return NULL. */ |
| 3310 | |
| 3311 | struct obj_section * |
| 3312 | find_pc_mapped_section (CORE_ADDR pc) |
| 3313 | { |
| 3314 | struct objfile *objfile; |
| 3315 | struct obj_section *osect; |
| 3316 | |
| 3317 | if (overlay_debugging) |
| 3318 | ALL_OBJSECTIONS (objfile, osect) |
| 3319 | if (pc_in_mapped_range (pc, osect) && section_is_mapped (osect)) |
| 3320 | return osect; |
| 3321 | |
| 3322 | return NULL; |
| 3323 | } |
| 3324 | |
| 3325 | /* Function: list_overlays_command |
| 3326 | Print a list of mapped sections and their PC ranges. */ |
| 3327 | |
| 3328 | static void |
| 3329 | list_overlays_command (char *args, int from_tty) |
| 3330 | { |
| 3331 | int nmapped = 0; |
| 3332 | struct objfile *objfile; |
| 3333 | struct obj_section *osect; |
| 3334 | |
| 3335 | if (overlay_debugging) |
| 3336 | ALL_OBJSECTIONS (objfile, osect) |
| 3337 | if (section_is_mapped (osect)) |
| 3338 | { |
| 3339 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 3340 | const char *name; |
| 3341 | bfd_vma lma, vma; |
| 3342 | int size; |
| 3343 | |
| 3344 | vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section); |
| 3345 | lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section); |
| 3346 | size = bfd_get_section_size (osect->the_bfd_section); |
| 3347 | name = bfd_section_name (objfile->obfd, osect->the_bfd_section); |
| 3348 | |
| 3349 | printf_filtered ("Section %s, loaded at ", name); |
| 3350 | fputs_filtered (paddress (gdbarch, lma), gdb_stdout); |
| 3351 | puts_filtered (" - "); |
| 3352 | fputs_filtered (paddress (gdbarch, lma + size), gdb_stdout); |
| 3353 | printf_filtered (", mapped at "); |
| 3354 | fputs_filtered (paddress (gdbarch, vma), gdb_stdout); |
| 3355 | puts_filtered (" - "); |
| 3356 | fputs_filtered (paddress (gdbarch, vma + size), gdb_stdout); |
| 3357 | puts_filtered ("\n"); |
| 3358 | |
| 3359 | nmapped++; |
| 3360 | } |
| 3361 | if (nmapped == 0) |
| 3362 | printf_filtered (_("No sections are mapped.\n")); |
| 3363 | } |
| 3364 | |
| 3365 | /* Function: map_overlay_command |
| 3366 | Mark the named section as mapped (ie. residing at its VMA address). */ |
| 3367 | |
| 3368 | static void |
| 3369 | map_overlay_command (char *args, int from_tty) |
| 3370 | { |
| 3371 | struct objfile *objfile, *objfile2; |
| 3372 | struct obj_section *sec, *sec2; |
| 3373 | |
| 3374 | if (!overlay_debugging) |
| 3375 | error (_("Overlay debugging not enabled. Use " |
| 3376 | "either the 'overlay auto' or\n" |
| 3377 | "the 'overlay manual' command.")); |
| 3378 | |
| 3379 | if (args == 0 || *args == 0) |
| 3380 | error (_("Argument required: name of an overlay section")); |
| 3381 | |
| 3382 | /* First, find a section matching the user supplied argument. */ |
| 3383 | ALL_OBJSECTIONS (objfile, sec) |
| 3384 | if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) |
| 3385 | { |
| 3386 | /* Now, check to see if the section is an overlay. */ |
| 3387 | if (!section_is_overlay (sec)) |
| 3388 | continue; /* not an overlay section */ |
| 3389 | |
| 3390 | /* Mark the overlay as "mapped". */ |
| 3391 | sec->ovly_mapped = 1; |
| 3392 | |
| 3393 | /* Next, make a pass and unmap any sections that are |
| 3394 | overlapped by this new section: */ |
| 3395 | ALL_OBJSECTIONS (objfile2, sec2) |
| 3396 | if (sec2->ovly_mapped && sec != sec2 && sections_overlap (sec, sec2)) |
| 3397 | { |
| 3398 | if (info_verbose) |
| 3399 | printf_unfiltered (_("Note: section %s unmapped by overlap\n"), |
| 3400 | bfd_section_name (objfile->obfd, |
| 3401 | sec2->the_bfd_section)); |
| 3402 | sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2. */ |
| 3403 | } |
| 3404 | return; |
| 3405 | } |
| 3406 | error (_("No overlay section called %s"), args); |
| 3407 | } |
| 3408 | |
| 3409 | /* Function: unmap_overlay_command |
| 3410 | Mark the overlay section as unmapped |
| 3411 | (ie. resident in its LMA address range, rather than the VMA range). */ |
| 3412 | |
| 3413 | static void |
| 3414 | unmap_overlay_command (char *args, int from_tty) |
| 3415 | { |
| 3416 | struct objfile *objfile; |
| 3417 | struct obj_section *sec = NULL; |
| 3418 | |
| 3419 | if (!overlay_debugging) |
| 3420 | error (_("Overlay debugging not enabled. " |
| 3421 | "Use either the 'overlay auto' or\n" |
| 3422 | "the 'overlay manual' command.")); |
| 3423 | |
| 3424 | if (args == 0 || *args == 0) |
| 3425 | error (_("Argument required: name of an overlay section")); |
| 3426 | |
| 3427 | /* First, find a section matching the user supplied argument. */ |
| 3428 | ALL_OBJSECTIONS (objfile, sec) |
| 3429 | if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) |
| 3430 | { |
| 3431 | if (!sec->ovly_mapped) |
| 3432 | error (_("Section %s is not mapped"), args); |
| 3433 | sec->ovly_mapped = 0; |
| 3434 | return; |
| 3435 | } |
| 3436 | error (_("No overlay section called %s"), args); |
| 3437 | } |
| 3438 | |
| 3439 | /* Function: overlay_auto_command |
| 3440 | A utility command to turn on overlay debugging. |
| 3441 | Possibly this should be done via a set/show command. */ |
| 3442 | |
| 3443 | static void |
| 3444 | overlay_auto_command (char *args, int from_tty) |
| 3445 | { |
| 3446 | overlay_debugging = ovly_auto; |
| 3447 | enable_overlay_breakpoints (); |
| 3448 | if (info_verbose) |
| 3449 | printf_unfiltered (_("Automatic overlay debugging enabled.")); |
| 3450 | } |
| 3451 | |
| 3452 | /* Function: overlay_manual_command |
| 3453 | A utility command to turn on overlay debugging. |
| 3454 | Possibly this should be done via a set/show command. */ |
| 3455 | |
| 3456 | static void |
| 3457 | overlay_manual_command (char *args, int from_tty) |
| 3458 | { |
| 3459 | overlay_debugging = ovly_on; |
| 3460 | disable_overlay_breakpoints (); |
| 3461 | if (info_verbose) |
| 3462 | printf_unfiltered (_("Overlay debugging enabled.")); |
| 3463 | } |
| 3464 | |
| 3465 | /* Function: overlay_off_command |
| 3466 | A utility command to turn on overlay debugging. |
| 3467 | Possibly this should be done via a set/show command. */ |
| 3468 | |
| 3469 | static void |
| 3470 | overlay_off_command (char *args, int from_tty) |
| 3471 | { |
| 3472 | overlay_debugging = ovly_off; |
| 3473 | disable_overlay_breakpoints (); |
| 3474 | if (info_verbose) |
| 3475 | printf_unfiltered (_("Overlay debugging disabled.")); |
| 3476 | } |
| 3477 | |
| 3478 | static void |
| 3479 | overlay_load_command (char *args, int from_tty) |
| 3480 | { |
| 3481 | struct gdbarch *gdbarch = get_current_arch (); |
| 3482 | |
| 3483 | if (gdbarch_overlay_update_p (gdbarch)) |
| 3484 | gdbarch_overlay_update (gdbarch, NULL); |
| 3485 | else |
| 3486 | error (_("This target does not know how to read its overlay state.")); |
| 3487 | } |
| 3488 | |
| 3489 | /* Function: overlay_command |
| 3490 | A place-holder for a mis-typed command. */ |
| 3491 | |
| 3492 | /* Command list chain containing all defined "overlay" subcommands. */ |
| 3493 | static struct cmd_list_element *overlaylist; |
| 3494 | |
| 3495 | static void |
| 3496 | overlay_command (char *args, int from_tty) |
| 3497 | { |
| 3498 | printf_unfiltered |
| 3499 | ("\"overlay\" must be followed by the name of an overlay command.\n"); |
| 3500 | help_list (overlaylist, "overlay ", all_commands, gdb_stdout); |
| 3501 | } |
| 3502 | |
| 3503 | /* Target Overlays for the "Simplest" overlay manager: |
| 3504 | |
| 3505 | This is GDB's default target overlay layer. It works with the |
| 3506 | minimal overlay manager supplied as an example by Cygnus. The |
| 3507 | entry point is via a function pointer "gdbarch_overlay_update", |
| 3508 | so targets that use a different runtime overlay manager can |
| 3509 | substitute their own overlay_update function and take over the |
| 3510 | function pointer. |
| 3511 | |
| 3512 | The overlay_update function pokes around in the target's data structures |
| 3513 | to see what overlays are mapped, and updates GDB's overlay mapping with |
| 3514 | this information. |
| 3515 | |
| 3516 | In this simple implementation, the target data structures are as follows: |
| 3517 | unsigned _novlys; /# number of overlay sections #/ |
| 3518 | unsigned _ovly_table[_novlys][4] = { |
| 3519 | {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/ |
| 3520 | {..., ..., ..., ...}, |
| 3521 | } |
| 3522 | unsigned _novly_regions; /# number of overlay regions #/ |
| 3523 | unsigned _ovly_region_table[_novly_regions][3] = { |
| 3524 | {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/ |
| 3525 | {..., ..., ...}, |
| 3526 | } |
| 3527 | These functions will attempt to update GDB's mappedness state in the |
| 3528 | symbol section table, based on the target's mappedness state. |
| 3529 | |
| 3530 | To do this, we keep a cached copy of the target's _ovly_table, and |
| 3531 | attempt to detect when the cached copy is invalidated. The main |
| 3532 | entry point is "simple_overlay_update(SECT), which looks up SECT in |
| 3533 | the cached table and re-reads only the entry for that section from |
| 3534 | the target (whenever possible). */ |
| 3535 | |
| 3536 | /* Cached, dynamically allocated copies of the target data structures: */ |
| 3537 | static unsigned (*cache_ovly_table)[4] = 0; |
| 3538 | static unsigned cache_novlys = 0; |
| 3539 | static CORE_ADDR cache_ovly_table_base = 0; |
| 3540 | enum ovly_index |
| 3541 | { |
| 3542 | VMA, OSIZE, LMA, MAPPED |
| 3543 | }; |
| 3544 | |
| 3545 | /* Throw away the cached copy of _ovly_table. */ |
| 3546 | |
| 3547 | static void |
| 3548 | simple_free_overlay_table (void) |
| 3549 | { |
| 3550 | if (cache_ovly_table) |
| 3551 | xfree (cache_ovly_table); |
| 3552 | cache_novlys = 0; |
| 3553 | cache_ovly_table = NULL; |
| 3554 | cache_ovly_table_base = 0; |
| 3555 | } |
| 3556 | |
| 3557 | /* Read an array of ints of size SIZE from the target into a local buffer. |
| 3558 | Convert to host order. int LEN is number of ints. */ |
| 3559 | |
| 3560 | static void |
| 3561 | read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr, |
| 3562 | int len, int size, enum bfd_endian byte_order) |
| 3563 | { |
| 3564 | /* FIXME (alloca): Not safe if array is very large. */ |
| 3565 | gdb_byte *buf = alloca (len * size); |
| 3566 | int i; |
| 3567 | |
| 3568 | read_memory (memaddr, buf, len * size); |
| 3569 | for (i = 0; i < len; i++) |
| 3570 | myaddr[i] = extract_unsigned_integer (size * i + buf, size, byte_order); |
| 3571 | } |
| 3572 | |
| 3573 | /* Find and grab a copy of the target _ovly_table |
| 3574 | (and _novlys, which is needed for the table's size). */ |
| 3575 | |
| 3576 | static int |
| 3577 | simple_read_overlay_table (void) |
| 3578 | { |
| 3579 | struct bound_minimal_symbol novlys_msym; |
| 3580 | struct bound_minimal_symbol ovly_table_msym; |
| 3581 | struct gdbarch *gdbarch; |
| 3582 | int word_size; |
| 3583 | enum bfd_endian byte_order; |
| 3584 | |
| 3585 | simple_free_overlay_table (); |
| 3586 | novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL); |
| 3587 | if (! novlys_msym.minsym) |
| 3588 | { |
| 3589 | error (_("Error reading inferior's overlay table: " |
| 3590 | "couldn't find `_novlys' variable\n" |
| 3591 | "in inferior. Use `overlay manual' mode.")); |
| 3592 | return 0; |
| 3593 | } |
| 3594 | |
| 3595 | ovly_table_msym = lookup_bound_minimal_symbol ("_ovly_table"); |
| 3596 | if (! ovly_table_msym.minsym) |
| 3597 | { |
| 3598 | error (_("Error reading inferior's overlay table: couldn't find " |
| 3599 | "`_ovly_table' array\n" |
| 3600 | "in inferior. Use `overlay manual' mode.")); |
| 3601 | return 0; |
| 3602 | } |
| 3603 | |
| 3604 | gdbarch = get_objfile_arch (ovly_table_msym.objfile); |
| 3605 | word_size = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT; |
| 3606 | byte_order = gdbarch_byte_order (gdbarch); |
| 3607 | |
| 3608 | cache_novlys = read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym), |
| 3609 | 4, byte_order); |
| 3610 | cache_ovly_table |
| 3611 | = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table)); |
| 3612 | cache_ovly_table_base = BMSYMBOL_VALUE_ADDRESS (ovly_table_msym); |
| 3613 | read_target_long_array (cache_ovly_table_base, |
| 3614 | (unsigned int *) cache_ovly_table, |
| 3615 | cache_novlys * 4, word_size, byte_order); |
| 3616 | |
| 3617 | return 1; /* SUCCESS */ |
| 3618 | } |
| 3619 | |
| 3620 | /* Function: simple_overlay_update_1 |
| 3621 | A helper function for simple_overlay_update. Assuming a cached copy |
| 3622 | of _ovly_table exists, look through it to find an entry whose vma, |
| 3623 | lma and size match those of OSECT. Re-read the entry and make sure |
| 3624 | it still matches OSECT (else the table may no longer be valid). |
| 3625 | Set OSECT's mapped state to match the entry. Return: 1 for |
| 3626 | success, 0 for failure. */ |
| 3627 | |
| 3628 | static int |
| 3629 | simple_overlay_update_1 (struct obj_section *osect) |
| 3630 | { |
| 3631 | int i, size; |
| 3632 | bfd *obfd = osect->objfile->obfd; |
| 3633 | asection *bsect = osect->the_bfd_section; |
| 3634 | struct gdbarch *gdbarch = get_objfile_arch (osect->objfile); |
| 3635 | int word_size = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT; |
| 3636 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 3637 | |
| 3638 | size = bfd_get_section_size (osect->the_bfd_section); |
| 3639 | for (i = 0; i < cache_novlys; i++) |
| 3640 | if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) |
| 3641 | && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) |
| 3642 | /* && cache_ovly_table[i][OSIZE] == size */ ) |
| 3643 | { |
| 3644 | read_target_long_array (cache_ovly_table_base + i * word_size, |
| 3645 | (unsigned int *) cache_ovly_table[i], |
| 3646 | 4, word_size, byte_order); |
| 3647 | if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) |
| 3648 | && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) |
| 3649 | /* && cache_ovly_table[i][OSIZE] == size */ ) |
| 3650 | { |
| 3651 | osect->ovly_mapped = cache_ovly_table[i][MAPPED]; |
| 3652 | return 1; |
| 3653 | } |
| 3654 | else /* Warning! Warning! Target's ovly table has changed! */ |
| 3655 | return 0; |
| 3656 | } |
| 3657 | return 0; |
| 3658 | } |
| 3659 | |
| 3660 | /* Function: simple_overlay_update |
| 3661 | If OSECT is NULL, then update all sections' mapped state |
| 3662 | (after re-reading the entire target _ovly_table). |
| 3663 | If OSECT is non-NULL, then try to find a matching entry in the |
| 3664 | cached ovly_table and update only OSECT's mapped state. |
| 3665 | If a cached entry can't be found or the cache isn't valid, then |
| 3666 | re-read the entire cache, and go ahead and update all sections. */ |
| 3667 | |
| 3668 | void |
| 3669 | simple_overlay_update (struct obj_section *osect) |
| 3670 | { |
| 3671 | struct objfile *objfile; |
| 3672 | |
| 3673 | /* Were we given an osect to look up? NULL means do all of them. */ |
| 3674 | if (osect) |
| 3675 | /* Have we got a cached copy of the target's overlay table? */ |
| 3676 | if (cache_ovly_table != NULL) |
| 3677 | { |
| 3678 | /* Does its cached location match what's currently in the |
| 3679 | symtab? */ |
| 3680 | struct bound_minimal_symbol minsym |
| 3681 | = lookup_minimal_symbol ("_ovly_table", NULL, NULL); |
| 3682 | |
| 3683 | if (minsym.minsym == NULL) |
| 3684 | error (_("Error reading inferior's overlay table: couldn't " |
| 3685 | "find `_ovly_table' array\n" |
| 3686 | "in inferior. Use `overlay manual' mode.")); |
| 3687 | |
| 3688 | if (cache_ovly_table_base == BMSYMBOL_VALUE_ADDRESS (minsym)) |
| 3689 | /* Then go ahead and try to look up this single section in |
| 3690 | the cache. */ |
| 3691 | if (simple_overlay_update_1 (osect)) |
| 3692 | /* Found it! We're done. */ |
| 3693 | return; |
| 3694 | } |
| 3695 | |
| 3696 | /* Cached table no good: need to read the entire table anew. |
| 3697 | Or else we want all the sections, in which case it's actually |
| 3698 | more efficient to read the whole table in one block anyway. */ |
| 3699 | |
| 3700 | if (! simple_read_overlay_table ()) |
| 3701 | return; |
| 3702 | |
| 3703 | /* Now may as well update all sections, even if only one was requested. */ |
| 3704 | ALL_OBJSECTIONS (objfile, osect) |
| 3705 | if (section_is_overlay (osect)) |
| 3706 | { |
| 3707 | int i, size; |
| 3708 | bfd *obfd = osect->objfile->obfd; |
| 3709 | asection *bsect = osect->the_bfd_section; |
| 3710 | |
| 3711 | size = bfd_get_section_size (bsect); |
| 3712 | for (i = 0; i < cache_novlys; i++) |
| 3713 | if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) |
| 3714 | && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) |
| 3715 | /* && cache_ovly_table[i][OSIZE] == size */ ) |
| 3716 | { /* obj_section matches i'th entry in ovly_table. */ |
| 3717 | osect->ovly_mapped = cache_ovly_table[i][MAPPED]; |
| 3718 | break; /* finished with inner for loop: break out. */ |
| 3719 | } |
| 3720 | } |
| 3721 | } |
| 3722 | |
| 3723 | /* Set the output sections and output offsets for section SECTP in |
| 3724 | ABFD. The relocation code in BFD will read these offsets, so we |
| 3725 | need to be sure they're initialized. We map each section to itself, |
| 3726 | with no offset; this means that SECTP->vma will be honored. */ |
| 3727 | |
| 3728 | static void |
| 3729 | symfile_dummy_outputs (bfd *abfd, asection *sectp, void *dummy) |
| 3730 | { |
| 3731 | sectp->output_section = sectp; |
| 3732 | sectp->output_offset = 0; |
| 3733 | } |
| 3734 | |
| 3735 | /* Default implementation for sym_relocate. */ |
| 3736 | |
| 3737 | bfd_byte * |
| 3738 | default_symfile_relocate (struct objfile *objfile, asection *sectp, |
| 3739 | bfd_byte *buf) |
| 3740 | { |
| 3741 | /* Use sectp->owner instead of objfile->obfd. sectp may point to a |
| 3742 | DWO file. */ |
| 3743 | bfd *abfd = sectp->owner; |
| 3744 | |
| 3745 | /* We're only interested in sections with relocation |
| 3746 | information. */ |
| 3747 | if ((sectp->flags & SEC_RELOC) == 0) |
| 3748 | return NULL; |
| 3749 | |
| 3750 | /* We will handle section offsets properly elsewhere, so relocate as if |
| 3751 | all sections begin at 0. */ |
| 3752 | bfd_map_over_sections (abfd, symfile_dummy_outputs, NULL); |
| 3753 | |
| 3754 | return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL); |
| 3755 | } |
| 3756 | |
| 3757 | /* Relocate the contents of a debug section SECTP in ABFD. The |
| 3758 | contents are stored in BUF if it is non-NULL, or returned in a |
| 3759 | malloc'd buffer otherwise. |
| 3760 | |
| 3761 | For some platforms and debug info formats, shared libraries contain |
| 3762 | relocations against the debug sections (particularly for DWARF-2; |
| 3763 | one affected platform is PowerPC GNU/Linux, although it depends on |
| 3764 | the version of the linker in use). Also, ELF object files naturally |
| 3765 | have unresolved relocations for their debug sections. We need to apply |
| 3766 | the relocations in order to get the locations of symbols correct. |
| 3767 | Another example that may require relocation processing, is the |
| 3768 | DWARF-2 .eh_frame section in .o files, although it isn't strictly a |
| 3769 | debug section. */ |
| 3770 | |
| 3771 | bfd_byte * |
| 3772 | symfile_relocate_debug_section (struct objfile *objfile, |
| 3773 | asection *sectp, bfd_byte *buf) |
| 3774 | { |
| 3775 | gdb_assert (objfile->sf->sym_relocate); |
| 3776 | |
| 3777 | return (*objfile->sf->sym_relocate) (objfile, sectp, buf); |
| 3778 | } |
| 3779 | |
| 3780 | struct symfile_segment_data * |
| 3781 | get_symfile_segment_data (bfd *abfd) |
| 3782 | { |
| 3783 | const struct sym_fns *sf = find_sym_fns (abfd); |
| 3784 | |
| 3785 | if (sf == NULL) |
| 3786 | return NULL; |
| 3787 | |
| 3788 | return sf->sym_segments (abfd); |
| 3789 | } |
| 3790 | |
| 3791 | void |
| 3792 | free_symfile_segment_data (struct symfile_segment_data *data) |
| 3793 | { |
| 3794 | xfree (data->segment_bases); |
| 3795 | xfree (data->segment_sizes); |
| 3796 | xfree (data->segment_info); |
| 3797 | xfree (data); |
| 3798 | } |
| 3799 | |
| 3800 | /* Given: |
| 3801 | - DATA, containing segment addresses from the object file ABFD, and |
| 3802 | the mapping from ABFD's sections onto the segments that own them, |
| 3803 | and |
| 3804 | - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual |
| 3805 | segment addresses reported by the target, |
| 3806 | store the appropriate offsets for each section in OFFSETS. |
| 3807 | |
| 3808 | If there are fewer entries in SEGMENT_BASES than there are segments |
| 3809 | in DATA, then apply SEGMENT_BASES' last entry to all the segments. |
| 3810 | |
| 3811 | If there are more entries, then ignore the extra. The target may |
| 3812 | not be able to distinguish between an empty data segment and a |
| 3813 | missing data segment; a missing text segment is less plausible. */ |
| 3814 | |
| 3815 | int |
| 3816 | symfile_map_offsets_to_segments (bfd *abfd, |
| 3817 | const struct symfile_segment_data *data, |
| 3818 | struct section_offsets *offsets, |
| 3819 | int num_segment_bases, |
| 3820 | const CORE_ADDR *segment_bases) |
| 3821 | { |
| 3822 | int i; |
| 3823 | asection *sect; |
| 3824 | |
| 3825 | /* It doesn't make sense to call this function unless you have some |
| 3826 | segment base addresses. */ |
| 3827 | gdb_assert (num_segment_bases > 0); |
| 3828 | |
| 3829 | /* If we do not have segment mappings for the object file, we |
| 3830 | can not relocate it by segments. */ |
| 3831 | gdb_assert (data != NULL); |
| 3832 | gdb_assert (data->num_segments > 0); |
| 3833 | |
| 3834 | for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next) |
| 3835 | { |
| 3836 | int which = data->segment_info[i]; |
| 3837 | |
| 3838 | gdb_assert (0 <= which && which <= data->num_segments); |
| 3839 | |
| 3840 | /* Don't bother computing offsets for sections that aren't |
| 3841 | loaded as part of any segment. */ |
| 3842 | if (! which) |
| 3843 | continue; |
| 3844 | |
| 3845 | /* Use the last SEGMENT_BASES entry as the address of any extra |
| 3846 | segments mentioned in DATA->segment_info. */ |
| 3847 | if (which > num_segment_bases) |
| 3848 | which = num_segment_bases; |
| 3849 | |
| 3850 | offsets->offsets[i] = (segment_bases[which - 1] |
| 3851 | - data->segment_bases[which - 1]); |
| 3852 | } |
| 3853 | |
| 3854 | return 1; |
| 3855 | } |
| 3856 | |
| 3857 | static void |
| 3858 | symfile_find_segment_sections (struct objfile *objfile) |
| 3859 | { |
| 3860 | bfd *abfd = objfile->obfd; |
| 3861 | int i; |
| 3862 | asection *sect; |
| 3863 | struct symfile_segment_data *data; |
| 3864 | |
| 3865 | data = get_symfile_segment_data (objfile->obfd); |
| 3866 | if (data == NULL) |
| 3867 | return; |
| 3868 | |
| 3869 | if (data->num_segments != 1 && data->num_segments != 2) |
| 3870 | { |
| 3871 | free_symfile_segment_data (data); |
| 3872 | return; |
| 3873 | } |
| 3874 | |
| 3875 | for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next) |
| 3876 | { |
| 3877 | int which = data->segment_info[i]; |
| 3878 | |
| 3879 | if (which == 1) |
| 3880 | { |
| 3881 | if (objfile->sect_index_text == -1) |
| 3882 | objfile->sect_index_text = sect->index; |
| 3883 | |
| 3884 | if (objfile->sect_index_rodata == -1) |
| 3885 | objfile->sect_index_rodata = sect->index; |
| 3886 | } |
| 3887 | else if (which == 2) |
| 3888 | { |
| 3889 | if (objfile->sect_index_data == -1) |
| 3890 | objfile->sect_index_data = sect->index; |
| 3891 | |
| 3892 | if (objfile->sect_index_bss == -1) |
| 3893 | objfile->sect_index_bss = sect->index; |
| 3894 | } |
| 3895 | } |
| 3896 | |
| 3897 | free_symfile_segment_data (data); |
| 3898 | } |
| 3899 | |
| 3900 | /* Listen for free_objfile events. */ |
| 3901 | |
| 3902 | static void |
| 3903 | symfile_free_objfile (struct objfile *objfile) |
| 3904 | { |
| 3905 | /* Remove the target sections owned by this objfile. */ |
| 3906 | if (objfile != NULL) |
| 3907 | remove_target_sections ((void *) objfile); |
| 3908 | } |
| 3909 | |
| 3910 | /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method". |
| 3911 | Expand all symtabs that match the specified criteria. |
| 3912 | See quick_symbol_functions.expand_symtabs_matching for details. */ |
| 3913 | |
| 3914 | void |
| 3915 | expand_symtabs_matching (expand_symtabs_file_matcher_ftype *file_matcher, |
| 3916 | expand_symtabs_symbol_matcher_ftype *symbol_matcher, |
| 3917 | expand_symtabs_exp_notify_ftype *expansion_notify, |
| 3918 | enum search_domain kind, |
| 3919 | void *data) |
| 3920 | { |
| 3921 | struct objfile *objfile; |
| 3922 | |
| 3923 | ALL_OBJFILES (objfile) |
| 3924 | { |
| 3925 | if (objfile->sf) |
| 3926 | objfile->sf->qf->expand_symtabs_matching (objfile, file_matcher, |
| 3927 | symbol_matcher, |
| 3928 | expansion_notify, kind, |
| 3929 | data); |
| 3930 | } |
| 3931 | } |
| 3932 | |
| 3933 | /* Wrapper around the quick_symbol_functions map_symbol_filenames "method". |
| 3934 | Map function FUN over every file. |
| 3935 | See quick_symbol_functions.map_symbol_filenames for details. */ |
| 3936 | |
| 3937 | void |
| 3938 | map_symbol_filenames (symbol_filename_ftype *fun, void *data, |
| 3939 | int need_fullname) |
| 3940 | { |
| 3941 | struct objfile *objfile; |
| 3942 | |
| 3943 | ALL_OBJFILES (objfile) |
| 3944 | { |
| 3945 | if (objfile->sf) |
| 3946 | objfile->sf->qf->map_symbol_filenames (objfile, fun, data, |
| 3947 | need_fullname); |
| 3948 | } |
| 3949 | } |
| 3950 | |
| 3951 | void |
| 3952 | _initialize_symfile (void) |
| 3953 | { |
| 3954 | struct cmd_list_element *c; |
| 3955 | |
| 3956 | observer_attach_free_objfile (symfile_free_objfile); |
| 3957 | |
| 3958 | c = add_cmd ("symbol-file", class_files, symbol_file_command, _("\ |
| 3959 | Load symbol table from executable file FILE.\n\ |
| 3960 | The `file' command can also load symbol tables, as well as setting the file\n\ |
| 3961 | to execute."), &cmdlist); |
| 3962 | set_cmd_completer (c, filename_completer); |
| 3963 | |
| 3964 | c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, _("\ |
| 3965 | Load symbols from FILE, assuming FILE has been dynamically loaded.\n\ |
| 3966 | Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\ |
| 3967 | ...]\nADDR is the starting address of the file's text.\n\ |
| 3968 | The optional arguments are section-name section-address pairs and\n\ |
| 3969 | should be specified if the data and bss segments are not contiguous\n\ |
| 3970 | with the text. SECT is a section name to be loaded at SECT_ADDR."), |
| 3971 | &cmdlist); |
| 3972 | set_cmd_completer (c, filename_completer); |
| 3973 | |
| 3974 | c = add_cmd ("remove-symbol-file", class_files, |
| 3975 | remove_symbol_file_command, _("\ |
| 3976 | Remove a symbol file added via the add-symbol-file command.\n\ |
| 3977 | Usage: remove-symbol-file FILENAME\n\ |
| 3978 | remove-symbol-file -a ADDRESS\n\ |
| 3979 | The file to remove can be identified by its filename or by an address\n\ |
| 3980 | that lies within the boundaries of this symbol file in memory."), |
| 3981 | &cmdlist); |
| 3982 | |
| 3983 | c = add_cmd ("load", class_files, load_command, _("\ |
| 3984 | Dynamically load FILE into the running program, and record its symbols\n\ |
| 3985 | for access from GDB.\n\ |
| 3986 | A load OFFSET may also be given."), &cmdlist); |
| 3987 | set_cmd_completer (c, filename_completer); |
| 3988 | |
| 3989 | add_prefix_cmd ("overlay", class_support, overlay_command, |
| 3990 | _("Commands for debugging overlays."), &overlaylist, |
| 3991 | "overlay ", 0, &cmdlist); |
| 3992 | |
| 3993 | add_com_alias ("ovly", "overlay", class_alias, 1); |
| 3994 | add_com_alias ("ov", "overlay", class_alias, 1); |
| 3995 | |
| 3996 | add_cmd ("map-overlay", class_support, map_overlay_command, |
| 3997 | _("Assert that an overlay section is mapped."), &overlaylist); |
| 3998 | |
| 3999 | add_cmd ("unmap-overlay", class_support, unmap_overlay_command, |
| 4000 | _("Assert that an overlay section is unmapped."), &overlaylist); |
| 4001 | |
| 4002 | add_cmd ("list-overlays", class_support, list_overlays_command, |
| 4003 | _("List mappings of overlay sections."), &overlaylist); |
| 4004 | |
| 4005 | add_cmd ("manual", class_support, overlay_manual_command, |
| 4006 | _("Enable overlay debugging."), &overlaylist); |
| 4007 | add_cmd ("off", class_support, overlay_off_command, |
| 4008 | _("Disable overlay debugging."), &overlaylist); |
| 4009 | add_cmd ("auto", class_support, overlay_auto_command, |
| 4010 | _("Enable automatic overlay debugging."), &overlaylist); |
| 4011 | add_cmd ("load-target", class_support, overlay_load_command, |
| 4012 | _("Read the overlay mapping state from the target."), &overlaylist); |
| 4013 | |
| 4014 | /* Filename extension to source language lookup table: */ |
| 4015 | init_filename_language_table (); |
| 4016 | add_setshow_string_noescape_cmd ("extension-language", class_files, |
| 4017 | &ext_args, _("\ |
| 4018 | Set mapping between filename extension and source language."), _("\ |
| 4019 | Show mapping between filename extension and source language."), _("\ |
| 4020 | Usage: set extension-language .foo bar"), |
| 4021 | set_ext_lang_command, |
| 4022 | show_ext_args, |
| 4023 | &setlist, &showlist); |
| 4024 | |
| 4025 | add_info ("extensions", info_ext_lang_command, |
| 4026 | _("All filename extensions associated with a source language.")); |
| 4027 | |
| 4028 | add_setshow_optional_filename_cmd ("debug-file-directory", class_support, |
| 4029 | &debug_file_directory, _("\ |
| 4030 | Set the directories where separate debug symbols are searched for."), _("\ |
| 4031 | Show the directories where separate debug symbols are searched for."), _("\ |
| 4032 | Separate debug symbols are first searched for in the same\n\ |
| 4033 | directory as the binary, then in the `" DEBUG_SUBDIRECTORY "' subdirectory,\n\ |
| 4034 | and lastly at the path of the directory of the binary with\n\ |
| 4035 | each global debug-file-directory component prepended."), |
| 4036 | NULL, |
| 4037 | show_debug_file_directory, |
| 4038 | &setlist, &showlist); |
| 4039 | |
| 4040 | add_setshow_enum_cmd ("symbol-loading", no_class, |
| 4041 | print_symbol_loading_enums, &print_symbol_loading, |
| 4042 | _("\ |
| 4043 | Set printing of symbol loading messages."), _("\ |
| 4044 | Show printing of symbol loading messages."), _("\ |
| 4045 | off == turn all messages off\n\ |
| 4046 | brief == print messages for the executable,\n\ |
| 4047 | and brief messages for shared libraries\n\ |
| 4048 | full == print messages for the executable,\n\ |
| 4049 | and messages for each shared library."), |
| 4050 | NULL, |
| 4051 | NULL, |
| 4052 | &setprintlist, &showprintlist); |
| 4053 | } |