| 1 | /* Generic symbol file reading for the GNU debugger, GDB. |
| 2 | |
| 3 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
| 4 | 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc. |
| 5 | |
| 6 | Contributed by Cygnus Support, using pieces from other GDB modules. |
| 7 | |
| 8 | This file is part of GDB. |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 2 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program; if not, write to the Free Software |
| 22 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 23 | Boston, MA 02111-1307, USA. */ |
| 24 | |
| 25 | #include "defs.h" |
| 26 | #include "bfdlink.h" |
| 27 | #include "symtab.h" |
| 28 | #include "gdbtypes.h" |
| 29 | #include "gdbcore.h" |
| 30 | #include "frame.h" |
| 31 | #include "target.h" |
| 32 | #include "value.h" |
| 33 | #include "symfile.h" |
| 34 | #include "objfiles.h" |
| 35 | #include "source.h" |
| 36 | #include "gdbcmd.h" |
| 37 | #include "breakpoint.h" |
| 38 | #include "language.h" |
| 39 | #include "complaints.h" |
| 40 | #include "demangle.h" |
| 41 | #include "inferior.h" /* for write_pc */ |
| 42 | #include "filenames.h" /* for DOSish file names */ |
| 43 | #include "gdb-stabs.h" |
| 44 | #include "gdb_obstack.h" |
| 45 | #include "completer.h" |
| 46 | #include "bcache.h" |
| 47 | #include "hashtab.h" |
| 48 | #include "readline/readline.h" |
| 49 | #include "gdb_assert.h" |
| 50 | #include "block.h" |
| 51 | |
| 52 | #include <sys/types.h> |
| 53 | #include <fcntl.h> |
| 54 | #include "gdb_string.h" |
| 55 | #include "gdb_stat.h" |
| 56 | #include <ctype.h> |
| 57 | #include <time.h> |
| 58 | |
| 59 | #ifndef O_BINARY |
| 60 | #define O_BINARY 0 |
| 61 | #endif |
| 62 | |
| 63 | int (*deprecated_ui_load_progress_hook) (const char *section, unsigned long num); |
| 64 | void (*deprecated_show_load_progress) (const char *section, |
| 65 | unsigned long section_sent, |
| 66 | unsigned long section_size, |
| 67 | unsigned long total_sent, |
| 68 | unsigned long total_size); |
| 69 | void (*deprecated_pre_add_symbol_hook) (const char *); |
| 70 | void (*deprecated_post_add_symbol_hook) (void); |
| 71 | void (*deprecated_target_new_objfile_hook) (struct objfile *); |
| 72 | |
| 73 | static void clear_symtab_users_cleanup (void *ignore); |
| 74 | |
| 75 | /* Global variables owned by this file */ |
| 76 | int readnow_symbol_files; /* Read full symbols immediately */ |
| 77 | |
| 78 | /* External variables and functions referenced. */ |
| 79 | |
| 80 | extern void report_transfer_performance (unsigned long, time_t, time_t); |
| 81 | |
| 82 | /* Functions this file defines */ |
| 83 | |
| 84 | #if 0 |
| 85 | static int simple_read_overlay_region_table (void); |
| 86 | static void simple_free_overlay_region_table (void); |
| 87 | #endif |
| 88 | |
| 89 | static void set_initial_language (void); |
| 90 | |
| 91 | static void load_command (char *, int); |
| 92 | |
| 93 | static void symbol_file_add_main_1 (char *args, int from_tty, int flags); |
| 94 | |
| 95 | static void add_symbol_file_command (char *, int); |
| 96 | |
| 97 | static void add_shared_symbol_files_command (char *, int); |
| 98 | |
| 99 | static void reread_separate_symbols (struct objfile *objfile); |
| 100 | |
| 101 | static void cashier_psymtab (struct partial_symtab *); |
| 102 | |
| 103 | bfd *symfile_bfd_open (char *); |
| 104 | |
| 105 | int get_section_index (struct objfile *, char *); |
| 106 | |
| 107 | static void find_sym_fns (struct objfile *); |
| 108 | |
| 109 | static void decrement_reading_symtab (void *); |
| 110 | |
| 111 | static void overlay_invalidate_all (void); |
| 112 | |
| 113 | static int overlay_is_mapped (struct obj_section *); |
| 114 | |
| 115 | void list_overlays_command (char *, int); |
| 116 | |
| 117 | void map_overlay_command (char *, int); |
| 118 | |
| 119 | void unmap_overlay_command (char *, int); |
| 120 | |
| 121 | static void overlay_auto_command (char *, int); |
| 122 | |
| 123 | static void overlay_manual_command (char *, int); |
| 124 | |
| 125 | static void overlay_off_command (char *, int); |
| 126 | |
| 127 | static void overlay_load_command (char *, int); |
| 128 | |
| 129 | static void overlay_command (char *, int); |
| 130 | |
| 131 | static void simple_free_overlay_table (void); |
| 132 | |
| 133 | static void read_target_long_array (CORE_ADDR, unsigned int *, int); |
| 134 | |
| 135 | static int simple_read_overlay_table (void); |
| 136 | |
| 137 | static int simple_overlay_update_1 (struct obj_section *); |
| 138 | |
| 139 | static void add_filename_language (char *ext, enum language lang); |
| 140 | |
| 141 | static void set_ext_lang_command (char *args, int from_tty); |
| 142 | |
| 143 | static void info_ext_lang_command (char *args, int from_tty); |
| 144 | |
| 145 | static char *find_separate_debug_file (struct objfile *objfile); |
| 146 | |
| 147 | static void init_filename_language_table (void); |
| 148 | |
| 149 | void _initialize_symfile (void); |
| 150 | |
| 151 | /* List of all available sym_fns. On gdb startup, each object file reader |
| 152 | calls add_symtab_fns() to register information on each format it is |
| 153 | prepared to read. */ |
| 154 | |
| 155 | static struct sym_fns *symtab_fns = NULL; |
| 156 | |
| 157 | /* Flag for whether user will be reloading symbols multiple times. |
| 158 | Defaults to ON for VxWorks, otherwise OFF. */ |
| 159 | |
| 160 | #ifdef SYMBOL_RELOADING_DEFAULT |
| 161 | int symbol_reloading = SYMBOL_RELOADING_DEFAULT; |
| 162 | #else |
| 163 | int symbol_reloading = 0; |
| 164 | #endif |
| 165 | |
| 166 | /* If non-zero, shared library symbols will be added automatically |
| 167 | when the inferior is created, new libraries are loaded, or when |
| 168 | attaching to the inferior. This is almost always what users will |
| 169 | want to have happen; but for very large programs, the startup time |
| 170 | will be excessive, and so if this is a problem, the user can clear |
| 171 | this flag and then add the shared library symbols as needed. Note |
| 172 | that there is a potential for confusion, since if the shared |
| 173 | library symbols are not loaded, commands like "info fun" will *not* |
| 174 | report all the functions that are actually present. */ |
| 175 | |
| 176 | int auto_solib_add = 1; |
| 177 | |
| 178 | /* For systems that support it, a threshold size in megabytes. If |
| 179 | automatically adding a new library's symbol table to those already |
| 180 | known to the debugger would cause the total shared library symbol |
| 181 | size to exceed this threshhold, then the shlib's symbols are not |
| 182 | added. The threshold is ignored if the user explicitly asks for a |
| 183 | shlib to be added, such as when using the "sharedlibrary" |
| 184 | command. */ |
| 185 | |
| 186 | int auto_solib_limit; |
| 187 | \f |
| 188 | |
| 189 | /* This compares two partial symbols by names, using strcmp_iw_ordered |
| 190 | for the comparison. */ |
| 191 | |
| 192 | static int |
| 193 | compare_psymbols (const void *s1p, const void *s2p) |
| 194 | { |
| 195 | struct partial_symbol *const *s1 = s1p; |
| 196 | struct partial_symbol *const *s2 = s2p; |
| 197 | |
| 198 | return strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*s1), |
| 199 | SYMBOL_SEARCH_NAME (*s2)); |
| 200 | } |
| 201 | |
| 202 | void |
| 203 | sort_pst_symbols (struct partial_symtab *pst) |
| 204 | { |
| 205 | /* Sort the global list; don't sort the static list */ |
| 206 | |
| 207 | qsort (pst->objfile->global_psymbols.list + pst->globals_offset, |
| 208 | pst->n_global_syms, sizeof (struct partial_symbol *), |
| 209 | compare_psymbols); |
| 210 | } |
| 211 | |
| 212 | /* Make a null terminated copy of the string at PTR with SIZE characters in |
| 213 | the obstack pointed to by OBSTACKP . Returns the address of the copy. |
| 214 | Note that the string at PTR does not have to be null terminated, I.E. it |
| 215 | may be part of a larger string and we are only saving a substring. */ |
| 216 | |
| 217 | char * |
| 218 | obsavestring (const char *ptr, int size, struct obstack *obstackp) |
| 219 | { |
| 220 | char *p = (char *) obstack_alloc (obstackp, size + 1); |
| 221 | /* Open-coded memcpy--saves function call time. These strings are usually |
| 222 | short. FIXME: Is this really still true with a compiler that can |
| 223 | inline memcpy? */ |
| 224 | { |
| 225 | const char *p1 = ptr; |
| 226 | char *p2 = p; |
| 227 | const char *end = ptr + size; |
| 228 | while (p1 != end) |
| 229 | *p2++ = *p1++; |
| 230 | } |
| 231 | p[size] = 0; |
| 232 | return p; |
| 233 | } |
| 234 | |
| 235 | /* Concatenate strings S1, S2 and S3; return the new string. Space is found |
| 236 | in the obstack pointed to by OBSTACKP. */ |
| 237 | |
| 238 | char * |
| 239 | obconcat (struct obstack *obstackp, const char *s1, const char *s2, |
| 240 | const char *s3) |
| 241 | { |
| 242 | int len = strlen (s1) + strlen (s2) + strlen (s3) + 1; |
| 243 | char *val = (char *) obstack_alloc (obstackp, len); |
| 244 | strcpy (val, s1); |
| 245 | strcat (val, s2); |
| 246 | strcat (val, s3); |
| 247 | return val; |
| 248 | } |
| 249 | |
| 250 | /* True if we are nested inside psymtab_to_symtab. */ |
| 251 | |
| 252 | int currently_reading_symtab = 0; |
| 253 | |
| 254 | static void |
| 255 | decrement_reading_symtab (void *dummy) |
| 256 | { |
| 257 | currently_reading_symtab--; |
| 258 | } |
| 259 | |
| 260 | /* Get the symbol table that corresponds to a partial_symtab. |
| 261 | This is fast after the first time you do it. In fact, there |
| 262 | is an even faster macro PSYMTAB_TO_SYMTAB that does the fast |
| 263 | case inline. */ |
| 264 | |
| 265 | struct symtab * |
| 266 | psymtab_to_symtab (struct partial_symtab *pst) |
| 267 | { |
| 268 | /* If it's been looked up before, return it. */ |
| 269 | if (pst->symtab) |
| 270 | return pst->symtab; |
| 271 | |
| 272 | /* If it has not yet been read in, read it. */ |
| 273 | if (!pst->readin) |
| 274 | { |
| 275 | struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL); |
| 276 | currently_reading_symtab++; |
| 277 | (*pst->read_symtab) (pst); |
| 278 | do_cleanups (back_to); |
| 279 | } |
| 280 | |
| 281 | return pst->symtab; |
| 282 | } |
| 283 | |
| 284 | /* Remember the lowest-addressed loadable section we've seen. |
| 285 | This function is called via bfd_map_over_sections. |
| 286 | |
| 287 | In case of equal vmas, the section with the largest size becomes the |
| 288 | lowest-addressed loadable section. |
| 289 | |
| 290 | If the vmas and sizes are equal, the last section is considered the |
| 291 | lowest-addressed loadable section. */ |
| 292 | |
| 293 | void |
| 294 | find_lowest_section (bfd *abfd, asection *sect, void *obj) |
| 295 | { |
| 296 | asection **lowest = (asection **) obj; |
| 297 | |
| 298 | if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD)) |
| 299 | return; |
| 300 | if (!*lowest) |
| 301 | *lowest = sect; /* First loadable section */ |
| 302 | else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect)) |
| 303 | *lowest = sect; /* A lower loadable section */ |
| 304 | else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect) |
| 305 | && (bfd_section_size (abfd, (*lowest)) |
| 306 | <= bfd_section_size (abfd, sect))) |
| 307 | *lowest = sect; |
| 308 | } |
| 309 | |
| 310 | /* Create a new section_addr_info, with room for NUM_SECTIONS. */ |
| 311 | |
| 312 | struct section_addr_info * |
| 313 | alloc_section_addr_info (size_t num_sections) |
| 314 | { |
| 315 | struct section_addr_info *sap; |
| 316 | size_t size; |
| 317 | |
| 318 | size = (sizeof (struct section_addr_info) |
| 319 | + sizeof (struct other_sections) * (num_sections - 1)); |
| 320 | sap = (struct section_addr_info *) xmalloc (size); |
| 321 | memset (sap, 0, size); |
| 322 | sap->num_sections = num_sections; |
| 323 | |
| 324 | return sap; |
| 325 | } |
| 326 | |
| 327 | |
| 328 | /* Return a freshly allocated copy of ADDRS. The section names, if |
| 329 | any, are also freshly allocated copies of those in ADDRS. */ |
| 330 | struct section_addr_info * |
| 331 | copy_section_addr_info (struct section_addr_info *addrs) |
| 332 | { |
| 333 | struct section_addr_info *copy |
| 334 | = alloc_section_addr_info (addrs->num_sections); |
| 335 | int i; |
| 336 | |
| 337 | copy->num_sections = addrs->num_sections; |
| 338 | for (i = 0; i < addrs->num_sections; i++) |
| 339 | { |
| 340 | copy->other[i].addr = addrs->other[i].addr; |
| 341 | if (addrs->other[i].name) |
| 342 | copy->other[i].name = xstrdup (addrs->other[i].name); |
| 343 | else |
| 344 | copy->other[i].name = NULL; |
| 345 | copy->other[i].sectindex = addrs->other[i].sectindex; |
| 346 | } |
| 347 | |
| 348 | return copy; |
| 349 | } |
| 350 | |
| 351 | |
| 352 | |
| 353 | /* Build (allocate and populate) a section_addr_info struct from |
| 354 | an existing section table. */ |
| 355 | |
| 356 | extern struct section_addr_info * |
| 357 | build_section_addr_info_from_section_table (const struct section_table *start, |
| 358 | const struct section_table *end) |
| 359 | { |
| 360 | struct section_addr_info *sap; |
| 361 | const struct section_table *stp; |
| 362 | int oidx; |
| 363 | |
| 364 | sap = alloc_section_addr_info (end - start); |
| 365 | |
| 366 | for (stp = start, oidx = 0; stp != end; stp++) |
| 367 | { |
| 368 | if (bfd_get_section_flags (stp->bfd, |
| 369 | stp->the_bfd_section) & (SEC_ALLOC | SEC_LOAD) |
| 370 | && oidx < end - start) |
| 371 | { |
| 372 | sap->other[oidx].addr = stp->addr; |
| 373 | sap->other[oidx].name |
| 374 | = xstrdup (bfd_section_name (stp->bfd, stp->the_bfd_section)); |
| 375 | sap->other[oidx].sectindex = stp->the_bfd_section->index; |
| 376 | oidx++; |
| 377 | } |
| 378 | } |
| 379 | |
| 380 | return sap; |
| 381 | } |
| 382 | |
| 383 | |
| 384 | /* Free all memory allocated by build_section_addr_info_from_section_table. */ |
| 385 | |
| 386 | extern void |
| 387 | free_section_addr_info (struct section_addr_info *sap) |
| 388 | { |
| 389 | int idx; |
| 390 | |
| 391 | for (idx = 0; idx < sap->num_sections; idx++) |
| 392 | if (sap->other[idx].name) |
| 393 | xfree (sap->other[idx].name); |
| 394 | xfree (sap); |
| 395 | } |
| 396 | |
| 397 | |
| 398 | /* Initialize OBJFILE's sect_index_* members. */ |
| 399 | static void |
| 400 | init_objfile_sect_indices (struct objfile *objfile) |
| 401 | { |
| 402 | asection *sect; |
| 403 | int i; |
| 404 | |
| 405 | sect = bfd_get_section_by_name (objfile->obfd, ".text"); |
| 406 | if (sect) |
| 407 | objfile->sect_index_text = sect->index; |
| 408 | |
| 409 | sect = bfd_get_section_by_name (objfile->obfd, ".data"); |
| 410 | if (sect) |
| 411 | objfile->sect_index_data = sect->index; |
| 412 | |
| 413 | sect = bfd_get_section_by_name (objfile->obfd, ".bss"); |
| 414 | if (sect) |
| 415 | objfile->sect_index_bss = sect->index; |
| 416 | |
| 417 | sect = bfd_get_section_by_name (objfile->obfd, ".rodata"); |
| 418 | if (sect) |
| 419 | objfile->sect_index_rodata = sect->index; |
| 420 | |
| 421 | /* This is where things get really weird... We MUST have valid |
| 422 | indices for the various sect_index_* members or gdb will abort. |
| 423 | So if for example, there is no ".text" section, we have to |
| 424 | accomodate that. Except when explicitly adding symbol files at |
| 425 | some address, section_offsets contains nothing but zeros, so it |
| 426 | doesn't matter which slot in section_offsets the individual |
| 427 | sect_index_* members index into. So if they are all zero, it is |
| 428 | safe to just point all the currently uninitialized indices to the |
| 429 | first slot. */ |
| 430 | |
| 431 | for (i = 0; i < objfile->num_sections; i++) |
| 432 | { |
| 433 | if (ANOFFSET (objfile->section_offsets, i) != 0) |
| 434 | { |
| 435 | break; |
| 436 | } |
| 437 | } |
| 438 | if (i == objfile->num_sections) |
| 439 | { |
| 440 | if (objfile->sect_index_text == -1) |
| 441 | objfile->sect_index_text = 0; |
| 442 | if (objfile->sect_index_data == -1) |
| 443 | objfile->sect_index_data = 0; |
| 444 | if (objfile->sect_index_bss == -1) |
| 445 | objfile->sect_index_bss = 0; |
| 446 | if (objfile->sect_index_rodata == -1) |
| 447 | objfile->sect_index_rodata = 0; |
| 448 | } |
| 449 | } |
| 450 | |
| 451 | |
| 452 | /* Parse the user's idea of an offset for dynamic linking, into our idea |
| 453 | of how to represent it for fast symbol reading. This is the default |
| 454 | version of the sym_fns.sym_offsets function for symbol readers that |
| 455 | don't need to do anything special. It allocates a section_offsets table |
| 456 | for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */ |
| 457 | |
| 458 | void |
| 459 | default_symfile_offsets (struct objfile *objfile, |
| 460 | struct section_addr_info *addrs) |
| 461 | { |
| 462 | int i; |
| 463 | |
| 464 | objfile->num_sections = bfd_count_sections (objfile->obfd); |
| 465 | objfile->section_offsets = (struct section_offsets *) |
| 466 | obstack_alloc (&objfile->objfile_obstack, |
| 467 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); |
| 468 | memset (objfile->section_offsets, 0, |
| 469 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); |
| 470 | |
| 471 | /* Now calculate offsets for section that were specified by the |
| 472 | caller. */ |
| 473 | for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++) |
| 474 | { |
| 475 | struct other_sections *osp ; |
| 476 | |
| 477 | osp = &addrs->other[i] ; |
| 478 | if (osp->addr == 0) |
| 479 | continue; |
| 480 | |
| 481 | /* Record all sections in offsets */ |
| 482 | /* The section_offsets in the objfile are here filled in using |
| 483 | the BFD index. */ |
| 484 | (objfile->section_offsets)->offsets[osp->sectindex] = osp->addr; |
| 485 | } |
| 486 | |
| 487 | /* Remember the bfd indexes for the .text, .data, .bss and |
| 488 | .rodata sections. */ |
| 489 | init_objfile_sect_indices (objfile); |
| 490 | } |
| 491 | |
| 492 | |
| 493 | /* Process a symbol file, as either the main file or as a dynamically |
| 494 | loaded file. |
| 495 | |
| 496 | OBJFILE is where the symbols are to be read from. |
| 497 | |
| 498 | ADDRS is the list of section load addresses. If the user has given |
| 499 | an 'add-symbol-file' command, then this is the list of offsets and |
| 500 | addresses he or she provided as arguments to the command; or, if |
| 501 | we're handling a shared library, these are the actual addresses the |
| 502 | sections are loaded at, according to the inferior's dynamic linker |
| 503 | (as gleaned by GDB's shared library code). We convert each address |
| 504 | into an offset from the section VMA's as it appears in the object |
| 505 | file, and then call the file's sym_offsets function to convert this |
| 506 | into a format-specific offset table --- a `struct section_offsets'. |
| 507 | If ADDRS is non-zero, OFFSETS must be zero. |
| 508 | |
| 509 | OFFSETS is a table of section offsets already in the right |
| 510 | format-specific representation. NUM_OFFSETS is the number of |
| 511 | elements present in OFFSETS->offsets. If OFFSETS is non-zero, we |
| 512 | assume this is the proper table the call to sym_offsets described |
| 513 | above would produce. Instead of calling sym_offsets, we just dump |
| 514 | it right into objfile->section_offsets. (When we're re-reading |
| 515 | symbols from an objfile, we don't have the original load address |
| 516 | list any more; all we have is the section offset table.) If |
| 517 | OFFSETS is non-zero, ADDRS must be zero. |
| 518 | |
| 519 | MAINLINE is nonzero if this is the main symbol file, or zero if |
| 520 | it's an extra symbol file such as dynamically loaded code. |
| 521 | |
| 522 | VERBO is nonzero if the caller has printed a verbose message about |
| 523 | the symbol reading (and complaints can be more terse about it). */ |
| 524 | |
| 525 | void |
| 526 | syms_from_objfile (struct objfile *objfile, |
| 527 | struct section_addr_info *addrs, |
| 528 | struct section_offsets *offsets, |
| 529 | int num_offsets, |
| 530 | int mainline, |
| 531 | int verbo) |
| 532 | { |
| 533 | struct section_addr_info *local_addr = NULL; |
| 534 | struct cleanup *old_chain; |
| 535 | |
| 536 | gdb_assert (! (addrs && offsets)); |
| 537 | |
| 538 | init_entry_point_info (objfile); |
| 539 | find_sym_fns (objfile); |
| 540 | |
| 541 | if (objfile->sf == NULL) |
| 542 | return; /* No symbols. */ |
| 543 | |
| 544 | /* Make sure that partially constructed symbol tables will be cleaned up |
| 545 | if an error occurs during symbol reading. */ |
| 546 | old_chain = make_cleanup_free_objfile (objfile); |
| 547 | |
| 548 | /* If ADDRS and OFFSETS are both NULL, put together a dummy address |
| 549 | list. We now establish the convention that an addr of zero means |
| 550 | no load address was specified. */ |
| 551 | if (! addrs && ! offsets) |
| 552 | { |
| 553 | local_addr |
| 554 | = alloc_section_addr_info (bfd_count_sections (objfile->obfd)); |
| 555 | make_cleanup (xfree, local_addr); |
| 556 | addrs = local_addr; |
| 557 | } |
| 558 | |
| 559 | /* Now either addrs or offsets is non-zero. */ |
| 560 | |
| 561 | if (mainline) |
| 562 | { |
| 563 | /* We will modify the main symbol table, make sure that all its users |
| 564 | will be cleaned up if an error occurs during symbol reading. */ |
| 565 | make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/); |
| 566 | |
| 567 | /* Since no error yet, throw away the old symbol table. */ |
| 568 | |
| 569 | if (symfile_objfile != NULL) |
| 570 | { |
| 571 | free_objfile (symfile_objfile); |
| 572 | symfile_objfile = NULL; |
| 573 | } |
| 574 | |
| 575 | /* Currently we keep symbols from the add-symbol-file command. |
| 576 | If the user wants to get rid of them, they should do "symbol-file" |
| 577 | without arguments first. Not sure this is the best behavior |
| 578 | (PR 2207). */ |
| 579 | |
| 580 | (*objfile->sf->sym_new_init) (objfile); |
| 581 | } |
| 582 | |
| 583 | /* Convert addr into an offset rather than an absolute address. |
| 584 | We find the lowest address of a loaded segment in the objfile, |
| 585 | and assume that <addr> is where that got loaded. |
| 586 | |
| 587 | We no longer warn if the lowest section is not a text segment (as |
| 588 | happens for the PA64 port. */ |
| 589 | if (!mainline && addrs && addrs->other[0].name) |
| 590 | { |
| 591 | asection *lower_sect; |
| 592 | asection *sect; |
| 593 | CORE_ADDR lower_offset; |
| 594 | int i; |
| 595 | |
| 596 | /* Find lowest loadable section to be used as starting point for |
| 597 | continguous sections. FIXME!! won't work without call to find |
| 598 | .text first, but this assumes text is lowest section. */ |
| 599 | lower_sect = bfd_get_section_by_name (objfile->obfd, ".text"); |
| 600 | if (lower_sect == NULL) |
| 601 | bfd_map_over_sections (objfile->obfd, find_lowest_section, |
| 602 | &lower_sect); |
| 603 | if (lower_sect == NULL) |
| 604 | warning ("no loadable sections found in added symbol-file %s", |
| 605 | objfile->name); |
| 606 | else |
| 607 | if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE) == 0) |
| 608 | warning ("Lowest section in %s is %s at %s", |
| 609 | objfile->name, |
| 610 | bfd_section_name (objfile->obfd, lower_sect), |
| 611 | paddr (bfd_section_vma (objfile->obfd, lower_sect))); |
| 612 | if (lower_sect != NULL) |
| 613 | lower_offset = bfd_section_vma (objfile->obfd, lower_sect); |
| 614 | else |
| 615 | lower_offset = 0; |
| 616 | |
| 617 | /* Calculate offsets for the loadable sections. |
| 618 | FIXME! Sections must be in order of increasing loadable section |
| 619 | so that contiguous sections can use the lower-offset!!! |
| 620 | |
| 621 | Adjust offsets if the segments are not contiguous. |
| 622 | If the section is contiguous, its offset should be set to |
| 623 | the offset of the highest loadable section lower than it |
| 624 | (the loadable section directly below it in memory). |
| 625 | this_offset = lower_offset = lower_addr - lower_orig_addr */ |
| 626 | |
| 627 | for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++) |
| 628 | { |
| 629 | if (addrs->other[i].addr != 0) |
| 630 | { |
| 631 | sect = bfd_get_section_by_name (objfile->obfd, |
| 632 | addrs->other[i].name); |
| 633 | if (sect) |
| 634 | { |
| 635 | addrs->other[i].addr |
| 636 | -= bfd_section_vma (objfile->obfd, sect); |
| 637 | lower_offset = addrs->other[i].addr; |
| 638 | /* This is the index used by BFD. */ |
| 639 | addrs->other[i].sectindex = sect->index ; |
| 640 | } |
| 641 | else |
| 642 | { |
| 643 | warning ("section %s not found in %s", |
| 644 | addrs->other[i].name, |
| 645 | objfile->name); |
| 646 | addrs->other[i].addr = 0; |
| 647 | } |
| 648 | } |
| 649 | else |
| 650 | addrs->other[i].addr = lower_offset; |
| 651 | } |
| 652 | } |
| 653 | |
| 654 | /* Initialize symbol reading routines for this objfile, allow complaints to |
| 655 | appear for this new file, and record how verbose to be, then do the |
| 656 | initial symbol reading for this file. */ |
| 657 | |
| 658 | (*objfile->sf->sym_init) (objfile); |
| 659 | clear_complaints (&symfile_complaints, 1, verbo); |
| 660 | |
| 661 | if (addrs) |
| 662 | (*objfile->sf->sym_offsets) (objfile, addrs); |
| 663 | else |
| 664 | { |
| 665 | size_t size = SIZEOF_N_SECTION_OFFSETS (num_offsets); |
| 666 | |
| 667 | /* Just copy in the offset table directly as given to us. */ |
| 668 | objfile->num_sections = num_offsets; |
| 669 | objfile->section_offsets |
| 670 | = ((struct section_offsets *) |
| 671 | obstack_alloc (&objfile->objfile_obstack, size)); |
| 672 | memcpy (objfile->section_offsets, offsets, size); |
| 673 | |
| 674 | init_objfile_sect_indices (objfile); |
| 675 | } |
| 676 | |
| 677 | #ifndef DEPRECATED_IBM6000_TARGET |
| 678 | /* This is a SVR4/SunOS specific hack, I think. In any event, it |
| 679 | screws RS/6000. sym_offsets should be doing this sort of thing, |
| 680 | because it knows the mapping between bfd sections and |
| 681 | section_offsets. */ |
| 682 | /* This is a hack. As far as I can tell, section offsets are not |
| 683 | target dependent. They are all set to addr with a couple of |
| 684 | exceptions. The exceptions are sysvr4 shared libraries, whose |
| 685 | offsets are kept in solib structures anyway and rs6000 xcoff |
| 686 | which handles shared libraries in a completely unique way. |
| 687 | |
| 688 | Section offsets are built similarly, except that they are built |
| 689 | by adding addr in all cases because there is no clear mapping |
| 690 | from section_offsets into actual sections. Note that solib.c |
| 691 | has a different algorithm for finding section offsets. |
| 692 | |
| 693 | These should probably all be collapsed into some target |
| 694 | independent form of shared library support. FIXME. */ |
| 695 | |
| 696 | if (addrs) |
| 697 | { |
| 698 | struct obj_section *s; |
| 699 | |
| 700 | /* Map section offsets in "addr" back to the object's |
| 701 | sections by comparing the section names with bfd's |
| 702 | section names. Then adjust the section address by |
| 703 | the offset. */ /* for gdb/13815 */ |
| 704 | |
| 705 | ALL_OBJFILE_OSECTIONS (objfile, s) |
| 706 | { |
| 707 | CORE_ADDR s_addr = 0; |
| 708 | int i; |
| 709 | |
| 710 | for (i = 0; |
| 711 | !s_addr && i < addrs->num_sections && addrs->other[i].name; |
| 712 | i++) |
| 713 | if (strcmp (bfd_section_name (s->objfile->obfd, |
| 714 | s->the_bfd_section), |
| 715 | addrs->other[i].name) == 0) |
| 716 | s_addr = addrs->other[i].addr; /* end added for gdb/13815 */ |
| 717 | |
| 718 | s->addr -= s->offset; |
| 719 | s->addr += s_addr; |
| 720 | s->endaddr -= s->offset; |
| 721 | s->endaddr += s_addr; |
| 722 | s->offset += s_addr; |
| 723 | } |
| 724 | } |
| 725 | #endif /* not DEPRECATED_IBM6000_TARGET */ |
| 726 | |
| 727 | (*objfile->sf->sym_read) (objfile, mainline); |
| 728 | |
| 729 | /* Don't allow char * to have a typename (else would get caddr_t). |
| 730 | Ditto void *. FIXME: Check whether this is now done by all the |
| 731 | symbol readers themselves (many of them now do), and if so remove |
| 732 | it from here. */ |
| 733 | |
| 734 | TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0; |
| 735 | TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0; |
| 736 | |
| 737 | /* Mark the objfile has having had initial symbol read attempted. Note |
| 738 | that this does not mean we found any symbols... */ |
| 739 | |
| 740 | objfile->flags |= OBJF_SYMS; |
| 741 | |
| 742 | /* Discard cleanups as symbol reading was successful. */ |
| 743 | |
| 744 | discard_cleanups (old_chain); |
| 745 | } |
| 746 | |
| 747 | /* Perform required actions after either reading in the initial |
| 748 | symbols for a new objfile, or mapping in the symbols from a reusable |
| 749 | objfile. */ |
| 750 | |
| 751 | void |
| 752 | new_symfile_objfile (struct objfile *objfile, int mainline, int verbo) |
| 753 | { |
| 754 | |
| 755 | /* If this is the main symbol file we have to clean up all users of the |
| 756 | old main symbol file. Otherwise it is sufficient to fixup all the |
| 757 | breakpoints that may have been redefined by this symbol file. */ |
| 758 | if (mainline) |
| 759 | { |
| 760 | /* OK, make it the "real" symbol file. */ |
| 761 | symfile_objfile = objfile; |
| 762 | |
| 763 | clear_symtab_users (); |
| 764 | } |
| 765 | else |
| 766 | { |
| 767 | breakpoint_re_set (); |
| 768 | } |
| 769 | |
| 770 | /* We're done reading the symbol file; finish off complaints. */ |
| 771 | clear_complaints (&symfile_complaints, 0, verbo); |
| 772 | } |
| 773 | |
| 774 | /* Process a symbol file, as either the main file or as a dynamically |
| 775 | loaded file. |
| 776 | |
| 777 | ABFD is a BFD already open on the file, as from symfile_bfd_open. |
| 778 | This BFD will be closed on error, and is always consumed by this function. |
| 779 | |
| 780 | FROM_TTY says how verbose to be. |
| 781 | |
| 782 | MAINLINE specifies whether this is the main symbol file, or whether |
| 783 | it's an extra symbol file such as dynamically loaded code. |
| 784 | |
| 785 | ADDRS, OFFSETS, and NUM_OFFSETS are as described for |
| 786 | syms_from_objfile, above. ADDRS is ignored when MAINLINE is |
| 787 | non-zero. |
| 788 | |
| 789 | Upon success, returns a pointer to the objfile that was added. |
| 790 | Upon failure, jumps back to command level (never returns). */ |
| 791 | static struct objfile * |
| 792 | symbol_file_add_with_addrs_or_offsets (bfd *abfd, int from_tty, |
| 793 | struct section_addr_info *addrs, |
| 794 | struct section_offsets *offsets, |
| 795 | int num_offsets, |
| 796 | int mainline, int flags) |
| 797 | { |
| 798 | struct objfile *objfile; |
| 799 | struct partial_symtab *psymtab; |
| 800 | char *debugfile; |
| 801 | struct section_addr_info *orig_addrs = NULL; |
| 802 | struct cleanup *my_cleanups; |
| 803 | const char *name = bfd_get_filename (abfd); |
| 804 | |
| 805 | my_cleanups = make_cleanup_bfd_close (abfd); |
| 806 | |
| 807 | /* Give user a chance to burp if we'd be |
| 808 | interactively wiping out any existing symbols. */ |
| 809 | |
| 810 | if ((have_full_symbols () || have_partial_symbols ()) |
| 811 | && mainline |
| 812 | && from_tty |
| 813 | && !query ("Load new symbol table from \"%s\"? ", name)) |
| 814 | error ("Not confirmed."); |
| 815 | |
| 816 | objfile = allocate_objfile (abfd, flags); |
| 817 | discard_cleanups (my_cleanups); |
| 818 | |
| 819 | if (addrs) |
| 820 | { |
| 821 | orig_addrs = copy_section_addr_info (addrs); |
| 822 | make_cleanup_free_section_addr_info (orig_addrs); |
| 823 | } |
| 824 | |
| 825 | /* We either created a new mapped symbol table, mapped an existing |
| 826 | symbol table file which has not had initial symbol reading |
| 827 | performed, or need to read an unmapped symbol table. */ |
| 828 | if (from_tty || info_verbose) |
| 829 | { |
| 830 | if (deprecated_pre_add_symbol_hook) |
| 831 | deprecated_pre_add_symbol_hook (name); |
| 832 | else |
| 833 | { |
| 834 | printf_unfiltered ("Reading symbols from %s...", name); |
| 835 | wrap_here (""); |
| 836 | gdb_flush (gdb_stdout); |
| 837 | } |
| 838 | } |
| 839 | syms_from_objfile (objfile, addrs, offsets, num_offsets, |
| 840 | mainline, from_tty); |
| 841 | |
| 842 | /* We now have at least a partial symbol table. Check to see if the |
| 843 | user requested that all symbols be read on initial access via either |
| 844 | the gdb startup command line or on a per symbol file basis. Expand |
| 845 | all partial symbol tables for this objfile if so. */ |
| 846 | |
| 847 | if ((flags & OBJF_READNOW) || readnow_symbol_files) |
| 848 | { |
| 849 | if (from_tty || info_verbose) |
| 850 | { |
| 851 | printf_unfiltered ("expanding to full symbols..."); |
| 852 | wrap_here (""); |
| 853 | gdb_flush (gdb_stdout); |
| 854 | } |
| 855 | |
| 856 | for (psymtab = objfile->psymtabs; |
| 857 | psymtab != NULL; |
| 858 | psymtab = psymtab->next) |
| 859 | { |
| 860 | psymtab_to_symtab (psymtab); |
| 861 | } |
| 862 | } |
| 863 | |
| 864 | debugfile = find_separate_debug_file (objfile); |
| 865 | if (debugfile) |
| 866 | { |
| 867 | if (addrs != NULL) |
| 868 | { |
| 869 | objfile->separate_debug_objfile |
| 870 | = symbol_file_add (debugfile, from_tty, orig_addrs, 0, flags); |
| 871 | } |
| 872 | else |
| 873 | { |
| 874 | objfile->separate_debug_objfile |
| 875 | = symbol_file_add (debugfile, from_tty, NULL, 0, flags); |
| 876 | } |
| 877 | objfile->separate_debug_objfile->separate_debug_objfile_backlink |
| 878 | = objfile; |
| 879 | |
| 880 | /* Put the separate debug object before the normal one, this is so that |
| 881 | usage of the ALL_OBJFILES_SAFE macro will stay safe. */ |
| 882 | put_objfile_before (objfile->separate_debug_objfile, objfile); |
| 883 | |
| 884 | xfree (debugfile); |
| 885 | } |
| 886 | |
| 887 | if (!have_partial_symbols () && !have_full_symbols ()) |
| 888 | { |
| 889 | wrap_here (""); |
| 890 | printf_filtered ("(no debugging symbols found)"); |
| 891 | if (from_tty || info_verbose) |
| 892 | printf_filtered ("..."); |
| 893 | else |
| 894 | printf_filtered ("\n"); |
| 895 | wrap_here (""); |
| 896 | } |
| 897 | |
| 898 | if (from_tty || info_verbose) |
| 899 | { |
| 900 | if (deprecated_post_add_symbol_hook) |
| 901 | deprecated_post_add_symbol_hook (); |
| 902 | else |
| 903 | { |
| 904 | printf_unfiltered ("done.\n"); |
| 905 | } |
| 906 | } |
| 907 | |
| 908 | /* We print some messages regardless of whether 'from_tty || |
| 909 | info_verbose' is true, so make sure they go out at the right |
| 910 | time. */ |
| 911 | gdb_flush (gdb_stdout); |
| 912 | |
| 913 | do_cleanups (my_cleanups); |
| 914 | |
| 915 | if (objfile->sf == NULL) |
| 916 | return objfile; /* No symbols. */ |
| 917 | |
| 918 | new_symfile_objfile (objfile, mainline, from_tty); |
| 919 | |
| 920 | if (deprecated_target_new_objfile_hook) |
| 921 | deprecated_target_new_objfile_hook (objfile); |
| 922 | |
| 923 | bfd_cache_close_all (); |
| 924 | return (objfile); |
| 925 | } |
| 926 | |
| 927 | |
| 928 | /* Process the symbol file ABFD, as either the main file or as a |
| 929 | dynamically loaded file. |
| 930 | |
| 931 | See symbol_file_add_with_addrs_or_offsets's comments for |
| 932 | details. */ |
| 933 | struct objfile * |
| 934 | symbol_file_add_from_bfd (bfd *abfd, int from_tty, |
| 935 | struct section_addr_info *addrs, |
| 936 | int mainline, int flags) |
| 937 | { |
| 938 | return symbol_file_add_with_addrs_or_offsets (abfd, |
| 939 | from_tty, addrs, 0, 0, |
| 940 | mainline, flags); |
| 941 | } |
| 942 | |
| 943 | |
| 944 | /* Process a symbol file, as either the main file or as a dynamically |
| 945 | loaded file. See symbol_file_add_with_addrs_or_offsets's comments |
| 946 | for details. */ |
| 947 | struct objfile * |
| 948 | symbol_file_add (char *name, int from_tty, struct section_addr_info *addrs, |
| 949 | int mainline, int flags) |
| 950 | { |
| 951 | return symbol_file_add_from_bfd (symfile_bfd_open (name), from_tty, |
| 952 | addrs, mainline, flags); |
| 953 | } |
| 954 | |
| 955 | |
| 956 | /* Call symbol_file_add() with default values and update whatever is |
| 957 | affected by the loading of a new main(). |
| 958 | Used when the file is supplied in the gdb command line |
| 959 | and by some targets with special loading requirements. |
| 960 | The auxiliary function, symbol_file_add_main_1(), has the flags |
| 961 | argument for the switches that can only be specified in the symbol_file |
| 962 | command itself. */ |
| 963 | |
| 964 | void |
| 965 | symbol_file_add_main (char *args, int from_tty) |
| 966 | { |
| 967 | symbol_file_add_main_1 (args, from_tty, 0); |
| 968 | } |
| 969 | |
| 970 | static void |
| 971 | symbol_file_add_main_1 (char *args, int from_tty, int flags) |
| 972 | { |
| 973 | symbol_file_add (args, from_tty, NULL, 1, flags); |
| 974 | |
| 975 | /* Getting new symbols may change our opinion about |
| 976 | what is frameless. */ |
| 977 | reinit_frame_cache (); |
| 978 | |
| 979 | set_initial_language (); |
| 980 | } |
| 981 | |
| 982 | void |
| 983 | symbol_file_clear (int from_tty) |
| 984 | { |
| 985 | if ((have_full_symbols () || have_partial_symbols ()) |
| 986 | && from_tty |
| 987 | && !query ("Discard symbol table from `%s'? ", |
| 988 | symfile_objfile->name)) |
| 989 | error ("Not confirmed."); |
| 990 | free_all_objfiles (); |
| 991 | |
| 992 | /* solib descriptors may have handles to objfiles. Since their |
| 993 | storage has just been released, we'd better wipe the solib |
| 994 | descriptors as well. |
| 995 | */ |
| 996 | #if defined(SOLIB_RESTART) |
| 997 | SOLIB_RESTART (); |
| 998 | #endif |
| 999 | |
| 1000 | symfile_objfile = NULL; |
| 1001 | if (from_tty) |
| 1002 | printf_unfiltered ("No symbol file now.\n"); |
| 1003 | } |
| 1004 | |
| 1005 | static char * |
| 1006 | get_debug_link_info (struct objfile *objfile, unsigned long *crc32_out) |
| 1007 | { |
| 1008 | asection *sect; |
| 1009 | bfd_size_type debuglink_size; |
| 1010 | unsigned long crc32; |
| 1011 | char *contents; |
| 1012 | int crc_offset; |
| 1013 | unsigned char *p; |
| 1014 | |
| 1015 | sect = bfd_get_section_by_name (objfile->obfd, ".gnu_debuglink"); |
| 1016 | |
| 1017 | if (sect == NULL) |
| 1018 | return NULL; |
| 1019 | |
| 1020 | debuglink_size = bfd_section_size (objfile->obfd, sect); |
| 1021 | |
| 1022 | contents = xmalloc (debuglink_size); |
| 1023 | bfd_get_section_contents (objfile->obfd, sect, contents, |
| 1024 | (file_ptr)0, (bfd_size_type)debuglink_size); |
| 1025 | |
| 1026 | /* Crc value is stored after the filename, aligned up to 4 bytes. */ |
| 1027 | crc_offset = strlen (contents) + 1; |
| 1028 | crc_offset = (crc_offset + 3) & ~3; |
| 1029 | |
| 1030 | crc32 = bfd_get_32 (objfile->obfd, (bfd_byte *) (contents + crc_offset)); |
| 1031 | |
| 1032 | *crc32_out = crc32; |
| 1033 | return contents; |
| 1034 | } |
| 1035 | |
| 1036 | static int |
| 1037 | separate_debug_file_exists (const char *name, unsigned long crc) |
| 1038 | { |
| 1039 | unsigned long file_crc = 0; |
| 1040 | int fd; |
| 1041 | char buffer[8*1024]; |
| 1042 | int count; |
| 1043 | |
| 1044 | fd = open (name, O_RDONLY | O_BINARY); |
| 1045 | if (fd < 0) |
| 1046 | return 0; |
| 1047 | |
| 1048 | while ((count = read (fd, buffer, sizeof (buffer))) > 0) |
| 1049 | file_crc = gnu_debuglink_crc32 (file_crc, buffer, count); |
| 1050 | |
| 1051 | close (fd); |
| 1052 | |
| 1053 | return crc == file_crc; |
| 1054 | } |
| 1055 | |
| 1056 | static char *debug_file_directory = NULL; |
| 1057 | |
| 1058 | #if ! defined (DEBUG_SUBDIRECTORY) |
| 1059 | #define DEBUG_SUBDIRECTORY ".debug" |
| 1060 | #endif |
| 1061 | |
| 1062 | static char * |
| 1063 | find_separate_debug_file (struct objfile *objfile) |
| 1064 | { |
| 1065 | asection *sect; |
| 1066 | char *basename; |
| 1067 | char *dir; |
| 1068 | char *debugfile; |
| 1069 | char *name_copy; |
| 1070 | bfd_size_type debuglink_size; |
| 1071 | unsigned long crc32; |
| 1072 | int i; |
| 1073 | |
| 1074 | basename = get_debug_link_info (objfile, &crc32); |
| 1075 | |
| 1076 | if (basename == NULL) |
| 1077 | return NULL; |
| 1078 | |
| 1079 | dir = xstrdup (objfile->name); |
| 1080 | |
| 1081 | /* Strip off the final filename part, leaving the directory name, |
| 1082 | followed by a slash. Objfile names should always be absolute and |
| 1083 | tilde-expanded, so there should always be a slash in there |
| 1084 | somewhere. */ |
| 1085 | for (i = strlen(dir) - 1; i >= 0; i--) |
| 1086 | { |
| 1087 | if (IS_DIR_SEPARATOR (dir[i])) |
| 1088 | break; |
| 1089 | } |
| 1090 | gdb_assert (i >= 0 && IS_DIR_SEPARATOR (dir[i])); |
| 1091 | dir[i+1] = '\0'; |
| 1092 | |
| 1093 | debugfile = alloca (strlen (debug_file_directory) + 1 |
| 1094 | + strlen (dir) |
| 1095 | + strlen (DEBUG_SUBDIRECTORY) |
| 1096 | + strlen ("/") |
| 1097 | + strlen (basename) |
| 1098 | + 1); |
| 1099 | |
| 1100 | /* First try in the same directory as the original file. */ |
| 1101 | strcpy (debugfile, dir); |
| 1102 | strcat (debugfile, basename); |
| 1103 | |
| 1104 | if (separate_debug_file_exists (debugfile, crc32)) |
| 1105 | { |
| 1106 | xfree (basename); |
| 1107 | xfree (dir); |
| 1108 | return xstrdup (debugfile); |
| 1109 | } |
| 1110 | |
| 1111 | /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */ |
| 1112 | strcpy (debugfile, dir); |
| 1113 | strcat (debugfile, DEBUG_SUBDIRECTORY); |
| 1114 | strcat (debugfile, "/"); |
| 1115 | strcat (debugfile, basename); |
| 1116 | |
| 1117 | if (separate_debug_file_exists (debugfile, crc32)) |
| 1118 | { |
| 1119 | xfree (basename); |
| 1120 | xfree (dir); |
| 1121 | return xstrdup (debugfile); |
| 1122 | } |
| 1123 | |
| 1124 | /* Then try in the global debugfile directory. */ |
| 1125 | strcpy (debugfile, debug_file_directory); |
| 1126 | strcat (debugfile, "/"); |
| 1127 | strcat (debugfile, dir); |
| 1128 | strcat (debugfile, basename); |
| 1129 | |
| 1130 | if (separate_debug_file_exists (debugfile, crc32)) |
| 1131 | { |
| 1132 | xfree (basename); |
| 1133 | xfree (dir); |
| 1134 | return xstrdup (debugfile); |
| 1135 | } |
| 1136 | |
| 1137 | xfree (basename); |
| 1138 | xfree (dir); |
| 1139 | return NULL; |
| 1140 | } |
| 1141 | |
| 1142 | |
| 1143 | /* This is the symbol-file command. Read the file, analyze its |
| 1144 | symbols, and add a struct symtab to a symtab list. The syntax of |
| 1145 | the command is rather bizarre--(1) buildargv implements various |
| 1146 | quoting conventions which are undocumented and have little or |
| 1147 | nothing in common with the way things are quoted (or not quoted) |
| 1148 | elsewhere in GDB, (2) options are used, which are not generally |
| 1149 | used in GDB (perhaps "set mapped on", "set readnow on" would be |
| 1150 | better), (3) the order of options matters, which is contrary to GNU |
| 1151 | conventions (because it is confusing and inconvenient). */ |
| 1152 | /* Note: ezannoni 2000-04-17. This function used to have support for |
| 1153 | rombug (see remote-os9k.c). It consisted of a call to target_link() |
| 1154 | (target.c) to get the address of the text segment from the target, |
| 1155 | and pass that to symbol_file_add(). This is no longer supported. */ |
| 1156 | |
| 1157 | void |
| 1158 | symbol_file_command (char *args, int from_tty) |
| 1159 | { |
| 1160 | char **argv; |
| 1161 | char *name = NULL; |
| 1162 | struct cleanup *cleanups; |
| 1163 | int flags = OBJF_USERLOADED; |
| 1164 | |
| 1165 | dont_repeat (); |
| 1166 | |
| 1167 | if (args == NULL) |
| 1168 | { |
| 1169 | symbol_file_clear (from_tty); |
| 1170 | } |
| 1171 | else |
| 1172 | { |
| 1173 | if ((argv = buildargv (args)) == NULL) |
| 1174 | { |
| 1175 | nomem (0); |
| 1176 | } |
| 1177 | cleanups = make_cleanup_freeargv (argv); |
| 1178 | while (*argv != NULL) |
| 1179 | { |
| 1180 | if (strcmp (*argv, "-readnow") == 0) |
| 1181 | flags |= OBJF_READNOW; |
| 1182 | else if (**argv == '-') |
| 1183 | error ("unknown option `%s'", *argv); |
| 1184 | else |
| 1185 | { |
| 1186 | name = *argv; |
| 1187 | |
| 1188 | symbol_file_add_main_1 (name, from_tty, flags); |
| 1189 | } |
| 1190 | argv++; |
| 1191 | } |
| 1192 | |
| 1193 | if (name == NULL) |
| 1194 | { |
| 1195 | error ("no symbol file name was specified"); |
| 1196 | } |
| 1197 | do_cleanups (cleanups); |
| 1198 | } |
| 1199 | } |
| 1200 | |
| 1201 | /* Set the initial language. |
| 1202 | |
| 1203 | A better solution would be to record the language in the psymtab when reading |
| 1204 | partial symbols, and then use it (if known) to set the language. This would |
| 1205 | be a win for formats that encode the language in an easily discoverable place, |
| 1206 | such as DWARF. For stabs, we can jump through hoops looking for specially |
| 1207 | named symbols or try to intuit the language from the specific type of stabs |
| 1208 | we find, but we can't do that until later when we read in full symbols. |
| 1209 | FIXME. */ |
| 1210 | |
| 1211 | static void |
| 1212 | set_initial_language (void) |
| 1213 | { |
| 1214 | struct partial_symtab *pst; |
| 1215 | enum language lang = language_unknown; |
| 1216 | |
| 1217 | pst = find_main_psymtab (); |
| 1218 | if (pst != NULL) |
| 1219 | { |
| 1220 | if (pst->filename != NULL) |
| 1221 | { |
| 1222 | lang = deduce_language_from_filename (pst->filename); |
| 1223 | } |
| 1224 | if (lang == language_unknown) |
| 1225 | { |
| 1226 | /* Make C the default language */ |
| 1227 | lang = language_c; |
| 1228 | } |
| 1229 | set_language (lang); |
| 1230 | expected_language = current_language; /* Don't warn the user */ |
| 1231 | } |
| 1232 | } |
| 1233 | |
| 1234 | /* Open file specified by NAME and hand it off to BFD for preliminary |
| 1235 | analysis. Result is a newly initialized bfd *, which includes a newly |
| 1236 | malloc'd` copy of NAME (tilde-expanded and made absolute). |
| 1237 | In case of trouble, error() is called. */ |
| 1238 | |
| 1239 | bfd * |
| 1240 | symfile_bfd_open (char *name) |
| 1241 | { |
| 1242 | bfd *sym_bfd; |
| 1243 | int desc; |
| 1244 | char *absolute_name; |
| 1245 | |
| 1246 | |
| 1247 | |
| 1248 | name = tilde_expand (name); /* Returns 1st new malloc'd copy */ |
| 1249 | |
| 1250 | /* Look down path for it, allocate 2nd new malloc'd copy. */ |
| 1251 | desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, name, O_RDONLY | O_BINARY, |
| 1252 | 0, &absolute_name); |
| 1253 | #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__) |
| 1254 | if (desc < 0) |
| 1255 | { |
| 1256 | char *exename = alloca (strlen (name) + 5); |
| 1257 | strcat (strcpy (exename, name), ".exe"); |
| 1258 | desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, exename, |
| 1259 | O_RDONLY | O_BINARY, 0, &absolute_name); |
| 1260 | } |
| 1261 | #endif |
| 1262 | if (desc < 0) |
| 1263 | { |
| 1264 | make_cleanup (xfree, name); |
| 1265 | perror_with_name (name); |
| 1266 | } |
| 1267 | xfree (name); /* Free 1st new malloc'd copy */ |
| 1268 | name = absolute_name; /* Keep 2nd malloc'd copy in bfd */ |
| 1269 | /* It'll be freed in free_objfile(). */ |
| 1270 | |
| 1271 | sym_bfd = bfd_fdopenr (name, gnutarget, desc); |
| 1272 | if (!sym_bfd) |
| 1273 | { |
| 1274 | close (desc); |
| 1275 | make_cleanup (xfree, name); |
| 1276 | error ("\"%s\": can't open to read symbols: %s.", name, |
| 1277 | bfd_errmsg (bfd_get_error ())); |
| 1278 | } |
| 1279 | bfd_set_cacheable (sym_bfd, 1); |
| 1280 | |
| 1281 | if (!bfd_check_format (sym_bfd, bfd_object)) |
| 1282 | { |
| 1283 | /* FIXME: should be checking for errors from bfd_close (for one thing, |
| 1284 | on error it does not free all the storage associated with the |
| 1285 | bfd). */ |
| 1286 | bfd_close (sym_bfd); /* This also closes desc */ |
| 1287 | make_cleanup (xfree, name); |
| 1288 | error ("\"%s\": can't read symbols: %s.", name, |
| 1289 | bfd_errmsg (bfd_get_error ())); |
| 1290 | } |
| 1291 | return (sym_bfd); |
| 1292 | } |
| 1293 | |
| 1294 | /* Return the section index for the given section name. Return -1 if |
| 1295 | the section was not found. */ |
| 1296 | int |
| 1297 | get_section_index (struct objfile *objfile, char *section_name) |
| 1298 | { |
| 1299 | asection *sect = bfd_get_section_by_name (objfile->obfd, section_name); |
| 1300 | if (sect) |
| 1301 | return sect->index; |
| 1302 | else |
| 1303 | return -1; |
| 1304 | } |
| 1305 | |
| 1306 | /* Link a new symtab_fns into the global symtab_fns list. Called on gdb |
| 1307 | startup by the _initialize routine in each object file format reader, |
| 1308 | to register information about each format the the reader is prepared |
| 1309 | to handle. */ |
| 1310 | |
| 1311 | void |
| 1312 | add_symtab_fns (struct sym_fns *sf) |
| 1313 | { |
| 1314 | sf->next = symtab_fns; |
| 1315 | symtab_fns = sf; |
| 1316 | } |
| 1317 | |
| 1318 | |
| 1319 | /* Initialize to read symbols from the symbol file sym_bfd. It either |
| 1320 | returns or calls error(). The result is an initialized struct sym_fns |
| 1321 | in the objfile structure, that contains cached information about the |
| 1322 | symbol file. */ |
| 1323 | |
| 1324 | static void |
| 1325 | find_sym_fns (struct objfile *objfile) |
| 1326 | { |
| 1327 | struct sym_fns *sf; |
| 1328 | enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd); |
| 1329 | char *our_target = bfd_get_target (objfile->obfd); |
| 1330 | |
| 1331 | if (our_flavour == bfd_target_srec_flavour |
| 1332 | || our_flavour == bfd_target_ihex_flavour |
| 1333 | || our_flavour == bfd_target_tekhex_flavour) |
| 1334 | return; /* No symbols. */ |
| 1335 | |
| 1336 | for (sf = symtab_fns; sf != NULL; sf = sf->next) |
| 1337 | { |
| 1338 | if (our_flavour == sf->sym_flavour) |
| 1339 | { |
| 1340 | objfile->sf = sf; |
| 1341 | return; |
| 1342 | } |
| 1343 | } |
| 1344 | error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.", |
| 1345 | bfd_get_target (objfile->obfd)); |
| 1346 | } |
| 1347 | \f |
| 1348 | /* This function runs the load command of our current target. */ |
| 1349 | |
| 1350 | static void |
| 1351 | load_command (char *arg, int from_tty) |
| 1352 | { |
| 1353 | if (arg == NULL) |
| 1354 | arg = get_exec_file (1); |
| 1355 | target_load (arg, from_tty); |
| 1356 | |
| 1357 | /* After re-loading the executable, we don't really know which |
| 1358 | overlays are mapped any more. */ |
| 1359 | overlay_cache_invalid = 1; |
| 1360 | } |
| 1361 | |
| 1362 | /* This version of "load" should be usable for any target. Currently |
| 1363 | it is just used for remote targets, not inftarg.c or core files, |
| 1364 | on the theory that only in that case is it useful. |
| 1365 | |
| 1366 | Avoiding xmodem and the like seems like a win (a) because we don't have |
| 1367 | to worry about finding it, and (b) On VMS, fork() is very slow and so |
| 1368 | we don't want to run a subprocess. On the other hand, I'm not sure how |
| 1369 | performance compares. */ |
| 1370 | |
| 1371 | static int download_write_size = 512; |
| 1372 | static int validate_download = 0; |
| 1373 | |
| 1374 | /* Callback service function for generic_load (bfd_map_over_sections). */ |
| 1375 | |
| 1376 | static void |
| 1377 | add_section_size_callback (bfd *abfd, asection *asec, void *data) |
| 1378 | { |
| 1379 | bfd_size_type *sum = data; |
| 1380 | |
| 1381 | *sum += bfd_get_section_size (asec); |
| 1382 | } |
| 1383 | |
| 1384 | /* Opaque data for load_section_callback. */ |
| 1385 | struct load_section_data { |
| 1386 | unsigned long load_offset; |
| 1387 | unsigned long write_count; |
| 1388 | unsigned long data_count; |
| 1389 | bfd_size_type total_size; |
| 1390 | }; |
| 1391 | |
| 1392 | /* Callback service function for generic_load (bfd_map_over_sections). */ |
| 1393 | |
| 1394 | static void |
| 1395 | load_section_callback (bfd *abfd, asection *asec, void *data) |
| 1396 | { |
| 1397 | struct load_section_data *args = data; |
| 1398 | |
| 1399 | if (bfd_get_section_flags (abfd, asec) & SEC_LOAD) |
| 1400 | { |
| 1401 | bfd_size_type size = bfd_get_section_size (asec); |
| 1402 | if (size > 0) |
| 1403 | { |
| 1404 | char *buffer; |
| 1405 | struct cleanup *old_chain; |
| 1406 | CORE_ADDR lma = bfd_section_lma (abfd, asec) + args->load_offset; |
| 1407 | bfd_size_type block_size; |
| 1408 | int err; |
| 1409 | const char *sect_name = bfd_get_section_name (abfd, asec); |
| 1410 | bfd_size_type sent; |
| 1411 | |
| 1412 | if (download_write_size > 0 && size > download_write_size) |
| 1413 | block_size = download_write_size; |
| 1414 | else |
| 1415 | block_size = size; |
| 1416 | |
| 1417 | buffer = xmalloc (size); |
| 1418 | old_chain = make_cleanup (xfree, buffer); |
| 1419 | |
| 1420 | /* Is this really necessary? I guess it gives the user something |
| 1421 | to look at during a long download. */ |
| 1422 | ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n", |
| 1423 | sect_name, paddr_nz (size), paddr_nz (lma)); |
| 1424 | |
| 1425 | bfd_get_section_contents (abfd, asec, buffer, 0, size); |
| 1426 | |
| 1427 | sent = 0; |
| 1428 | do |
| 1429 | { |
| 1430 | int len; |
| 1431 | bfd_size_type this_transfer = size - sent; |
| 1432 | |
| 1433 | if (this_transfer >= block_size) |
| 1434 | this_transfer = block_size; |
| 1435 | len = target_write_memory_partial (lma, buffer, |
| 1436 | this_transfer, &err); |
| 1437 | if (err) |
| 1438 | break; |
| 1439 | if (validate_download) |
| 1440 | { |
| 1441 | /* Broken memories and broken monitors manifest |
| 1442 | themselves here when bring new computers to |
| 1443 | life. This doubles already slow downloads. */ |
| 1444 | /* NOTE: cagney/1999-10-18: A more efficient |
| 1445 | implementation might add a verify_memory() |
| 1446 | method to the target vector and then use |
| 1447 | that. remote.c could implement that method |
| 1448 | using the ``qCRC'' packet. */ |
| 1449 | char *check = xmalloc (len); |
| 1450 | struct cleanup *verify_cleanups = |
| 1451 | make_cleanup (xfree, check); |
| 1452 | |
| 1453 | if (target_read_memory (lma, check, len) != 0) |
| 1454 | error ("Download verify read failed at 0x%s", |
| 1455 | paddr (lma)); |
| 1456 | if (memcmp (buffer, check, len) != 0) |
| 1457 | error ("Download verify compare failed at 0x%s", |
| 1458 | paddr (lma)); |
| 1459 | do_cleanups (verify_cleanups); |
| 1460 | } |
| 1461 | args->data_count += len; |
| 1462 | lma += len; |
| 1463 | buffer += len; |
| 1464 | args->write_count += 1; |
| 1465 | sent += len; |
| 1466 | if (quit_flag |
| 1467 | || (deprecated_ui_load_progress_hook != NULL |
| 1468 | && deprecated_ui_load_progress_hook (sect_name, sent))) |
| 1469 | error ("Canceled the download"); |
| 1470 | |
| 1471 | if (deprecated_show_load_progress != NULL) |
| 1472 | deprecated_show_load_progress (sect_name, sent, size, |
| 1473 | args->data_count, |
| 1474 | args->total_size); |
| 1475 | } |
| 1476 | while (sent < size); |
| 1477 | |
| 1478 | if (err != 0) |
| 1479 | error ("Memory access error while loading section %s.", sect_name); |
| 1480 | |
| 1481 | do_cleanups (old_chain); |
| 1482 | } |
| 1483 | } |
| 1484 | } |
| 1485 | |
| 1486 | void |
| 1487 | generic_load (char *args, int from_tty) |
| 1488 | { |
| 1489 | asection *s; |
| 1490 | bfd *loadfile_bfd; |
| 1491 | time_t start_time, end_time; /* Start and end times of download */ |
| 1492 | char *filename; |
| 1493 | struct cleanup *old_cleanups; |
| 1494 | char *offptr; |
| 1495 | struct load_section_data cbdata; |
| 1496 | CORE_ADDR entry; |
| 1497 | |
| 1498 | cbdata.load_offset = 0; /* Offset to add to vma for each section. */ |
| 1499 | cbdata.write_count = 0; /* Number of writes needed. */ |
| 1500 | cbdata.data_count = 0; /* Number of bytes written to target memory. */ |
| 1501 | cbdata.total_size = 0; /* Total size of all bfd sectors. */ |
| 1502 | |
| 1503 | /* Parse the input argument - the user can specify a load offset as |
| 1504 | a second argument. */ |
| 1505 | filename = xmalloc (strlen (args) + 1); |
| 1506 | old_cleanups = make_cleanup (xfree, filename); |
| 1507 | strcpy (filename, args); |
| 1508 | offptr = strchr (filename, ' '); |
| 1509 | if (offptr != NULL) |
| 1510 | { |
| 1511 | char *endptr; |
| 1512 | |
| 1513 | cbdata.load_offset = strtoul (offptr, &endptr, 0); |
| 1514 | if (offptr == endptr) |
| 1515 | error ("Invalid download offset:%s\n", offptr); |
| 1516 | *offptr = '\0'; |
| 1517 | } |
| 1518 | else |
| 1519 | cbdata.load_offset = 0; |
| 1520 | |
| 1521 | /* Open the file for loading. */ |
| 1522 | loadfile_bfd = bfd_openr (filename, gnutarget); |
| 1523 | if (loadfile_bfd == NULL) |
| 1524 | { |
| 1525 | perror_with_name (filename); |
| 1526 | return; |
| 1527 | } |
| 1528 | |
| 1529 | /* FIXME: should be checking for errors from bfd_close (for one thing, |
| 1530 | on error it does not free all the storage associated with the |
| 1531 | bfd). */ |
| 1532 | make_cleanup_bfd_close (loadfile_bfd); |
| 1533 | |
| 1534 | if (!bfd_check_format (loadfile_bfd, bfd_object)) |
| 1535 | { |
| 1536 | error ("\"%s\" is not an object file: %s", filename, |
| 1537 | bfd_errmsg (bfd_get_error ())); |
| 1538 | } |
| 1539 | |
| 1540 | bfd_map_over_sections (loadfile_bfd, add_section_size_callback, |
| 1541 | (void *) &cbdata.total_size); |
| 1542 | |
| 1543 | start_time = time (NULL); |
| 1544 | |
| 1545 | bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata); |
| 1546 | |
| 1547 | end_time = time (NULL); |
| 1548 | |
| 1549 | entry = bfd_get_start_address (loadfile_bfd); |
| 1550 | ui_out_text (uiout, "Start address "); |
| 1551 | ui_out_field_fmt (uiout, "address", "0x%s", paddr_nz (entry)); |
| 1552 | ui_out_text (uiout, ", load size "); |
| 1553 | ui_out_field_fmt (uiout, "load-size", "%lu", cbdata.data_count); |
| 1554 | ui_out_text (uiout, "\n"); |
| 1555 | /* We were doing this in remote-mips.c, I suspect it is right |
| 1556 | for other targets too. */ |
| 1557 | write_pc (entry); |
| 1558 | |
| 1559 | /* FIXME: are we supposed to call symbol_file_add or not? According |
| 1560 | to a comment from remote-mips.c (where a call to symbol_file_add |
| 1561 | was commented out), making the call confuses GDB if more than one |
| 1562 | file is loaded in. Some targets do (e.g., remote-vx.c) but |
| 1563 | others don't (or didn't - perhaps they have all been deleted). */ |
| 1564 | |
| 1565 | print_transfer_performance (gdb_stdout, cbdata.data_count, |
| 1566 | cbdata.write_count, end_time - start_time); |
| 1567 | |
| 1568 | do_cleanups (old_cleanups); |
| 1569 | } |
| 1570 | |
| 1571 | /* Report how fast the transfer went. */ |
| 1572 | |
| 1573 | /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being |
| 1574 | replaced by print_transfer_performance (with a very different |
| 1575 | function signature). */ |
| 1576 | |
| 1577 | void |
| 1578 | report_transfer_performance (unsigned long data_count, time_t start_time, |
| 1579 | time_t end_time) |
| 1580 | { |
| 1581 | print_transfer_performance (gdb_stdout, data_count, |
| 1582 | end_time - start_time, 0); |
| 1583 | } |
| 1584 | |
| 1585 | void |
| 1586 | print_transfer_performance (struct ui_file *stream, |
| 1587 | unsigned long data_count, |
| 1588 | unsigned long write_count, |
| 1589 | unsigned long time_count) |
| 1590 | { |
| 1591 | ui_out_text (uiout, "Transfer rate: "); |
| 1592 | if (time_count > 0) |
| 1593 | { |
| 1594 | ui_out_field_fmt (uiout, "transfer-rate", "%lu", |
| 1595 | (data_count * 8) / time_count); |
| 1596 | ui_out_text (uiout, " bits/sec"); |
| 1597 | } |
| 1598 | else |
| 1599 | { |
| 1600 | ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8)); |
| 1601 | ui_out_text (uiout, " bits in <1 sec"); |
| 1602 | } |
| 1603 | if (write_count > 0) |
| 1604 | { |
| 1605 | ui_out_text (uiout, ", "); |
| 1606 | ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count); |
| 1607 | ui_out_text (uiout, " bytes/write"); |
| 1608 | } |
| 1609 | ui_out_text (uiout, ".\n"); |
| 1610 | } |
| 1611 | |
| 1612 | /* This function allows the addition of incrementally linked object files. |
| 1613 | It does not modify any state in the target, only in the debugger. */ |
| 1614 | /* Note: ezannoni 2000-04-13 This function/command used to have a |
| 1615 | special case syntax for the rombug target (Rombug is the boot |
| 1616 | monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the |
| 1617 | rombug case, the user doesn't need to supply a text address, |
| 1618 | instead a call to target_link() (in target.c) would supply the |
| 1619 | value to use. We are now discontinuing this type of ad hoc syntax. */ |
| 1620 | |
| 1621 | static void |
| 1622 | add_symbol_file_command (char *args, int from_tty) |
| 1623 | { |
| 1624 | char *filename = NULL; |
| 1625 | int flags = OBJF_USERLOADED; |
| 1626 | char *arg; |
| 1627 | int expecting_option = 0; |
| 1628 | int section_index = 0; |
| 1629 | int argcnt = 0; |
| 1630 | int sec_num = 0; |
| 1631 | int i; |
| 1632 | int expecting_sec_name = 0; |
| 1633 | int expecting_sec_addr = 0; |
| 1634 | |
| 1635 | struct sect_opt |
| 1636 | { |
| 1637 | char *name; |
| 1638 | char *value; |
| 1639 | }; |
| 1640 | |
| 1641 | struct section_addr_info *section_addrs; |
| 1642 | struct sect_opt *sect_opts = NULL; |
| 1643 | size_t num_sect_opts = 0; |
| 1644 | struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL); |
| 1645 | |
| 1646 | num_sect_opts = 16; |
| 1647 | sect_opts = (struct sect_opt *) xmalloc (num_sect_opts |
| 1648 | * sizeof (struct sect_opt)); |
| 1649 | |
| 1650 | dont_repeat (); |
| 1651 | |
| 1652 | if (args == NULL) |
| 1653 | error ("add-symbol-file takes a file name and an address"); |
| 1654 | |
| 1655 | /* Make a copy of the string that we can safely write into. */ |
| 1656 | args = xstrdup (args); |
| 1657 | |
| 1658 | while (*args != '\000') |
| 1659 | { |
| 1660 | /* Any leading spaces? */ |
| 1661 | while (isspace (*args)) |
| 1662 | args++; |
| 1663 | |
| 1664 | /* Point arg to the beginning of the argument. */ |
| 1665 | arg = args; |
| 1666 | |
| 1667 | /* Move args pointer over the argument. */ |
| 1668 | while ((*args != '\000') && !isspace (*args)) |
| 1669 | args++; |
| 1670 | |
| 1671 | /* If there are more arguments, terminate arg and |
| 1672 | proceed past it. */ |
| 1673 | if (*args != '\000') |
| 1674 | *args++ = '\000'; |
| 1675 | |
| 1676 | /* Now process the argument. */ |
| 1677 | if (argcnt == 0) |
| 1678 | { |
| 1679 | /* The first argument is the file name. */ |
| 1680 | filename = tilde_expand (arg); |
| 1681 | make_cleanup (xfree, filename); |
| 1682 | } |
| 1683 | else |
| 1684 | if (argcnt == 1) |
| 1685 | { |
| 1686 | /* The second argument is always the text address at which |
| 1687 | to load the program. */ |
| 1688 | sect_opts[section_index].name = ".text"; |
| 1689 | sect_opts[section_index].value = arg; |
| 1690 | if (++section_index > num_sect_opts) |
| 1691 | { |
| 1692 | num_sect_opts *= 2; |
| 1693 | sect_opts = ((struct sect_opt *) |
| 1694 | xrealloc (sect_opts, |
| 1695 | num_sect_opts |
| 1696 | * sizeof (struct sect_opt))); |
| 1697 | } |
| 1698 | } |
| 1699 | else |
| 1700 | { |
| 1701 | /* It's an option (starting with '-') or it's an argument |
| 1702 | to an option */ |
| 1703 | |
| 1704 | if (*arg == '-') |
| 1705 | { |
| 1706 | if (strcmp (arg, "-readnow") == 0) |
| 1707 | flags |= OBJF_READNOW; |
| 1708 | else if (strcmp (arg, "-s") == 0) |
| 1709 | { |
| 1710 | expecting_sec_name = 1; |
| 1711 | expecting_sec_addr = 1; |
| 1712 | } |
| 1713 | } |
| 1714 | else |
| 1715 | { |
| 1716 | if (expecting_sec_name) |
| 1717 | { |
| 1718 | sect_opts[section_index].name = arg; |
| 1719 | expecting_sec_name = 0; |
| 1720 | } |
| 1721 | else |
| 1722 | if (expecting_sec_addr) |
| 1723 | { |
| 1724 | sect_opts[section_index].value = arg; |
| 1725 | expecting_sec_addr = 0; |
| 1726 | if (++section_index > num_sect_opts) |
| 1727 | { |
| 1728 | num_sect_opts *= 2; |
| 1729 | sect_opts = ((struct sect_opt *) |
| 1730 | xrealloc (sect_opts, |
| 1731 | num_sect_opts |
| 1732 | * sizeof (struct sect_opt))); |
| 1733 | } |
| 1734 | } |
| 1735 | else |
| 1736 | error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"); |
| 1737 | } |
| 1738 | } |
| 1739 | argcnt++; |
| 1740 | } |
| 1741 | |
| 1742 | /* Print the prompt for the query below. And save the arguments into |
| 1743 | a sect_addr_info structure to be passed around to other |
| 1744 | functions. We have to split this up into separate print |
| 1745 | statements because local_hex_string returns a local static |
| 1746 | string. */ |
| 1747 | |
| 1748 | printf_unfiltered ("add symbol table from file \"%s\" at\n", filename); |
| 1749 | section_addrs = alloc_section_addr_info (section_index); |
| 1750 | make_cleanup (xfree, section_addrs); |
| 1751 | for (i = 0; i < section_index; i++) |
| 1752 | { |
| 1753 | CORE_ADDR addr; |
| 1754 | char *val = sect_opts[i].value; |
| 1755 | char *sec = sect_opts[i].name; |
| 1756 | |
| 1757 | addr = parse_and_eval_address (val); |
| 1758 | |
| 1759 | /* Here we store the section offsets in the order they were |
| 1760 | entered on the command line. */ |
| 1761 | section_addrs->other[sec_num].name = sec; |
| 1762 | section_addrs->other[sec_num].addr = addr; |
| 1763 | printf_unfiltered ("\t%s_addr = %s\n", |
| 1764 | sec, |
| 1765 | local_hex_string ((unsigned long)addr)); |
| 1766 | sec_num++; |
| 1767 | |
| 1768 | /* The object's sections are initialized when a |
| 1769 | call is made to build_objfile_section_table (objfile). |
| 1770 | This happens in reread_symbols. |
| 1771 | At this point, we don't know what file type this is, |
| 1772 | so we can't determine what section names are valid. */ |
| 1773 | } |
| 1774 | |
| 1775 | if (from_tty && (!query ("%s", ""))) |
| 1776 | error ("Not confirmed."); |
| 1777 | |
| 1778 | symbol_file_add (filename, from_tty, section_addrs, 0, flags); |
| 1779 | |
| 1780 | /* Getting new symbols may change our opinion about what is |
| 1781 | frameless. */ |
| 1782 | reinit_frame_cache (); |
| 1783 | do_cleanups (my_cleanups); |
| 1784 | } |
| 1785 | \f |
| 1786 | static void |
| 1787 | add_shared_symbol_files_command (char *args, int from_tty) |
| 1788 | { |
| 1789 | #ifdef ADD_SHARED_SYMBOL_FILES |
| 1790 | ADD_SHARED_SYMBOL_FILES (args, from_tty); |
| 1791 | #else |
| 1792 | error ("This command is not available in this configuration of GDB."); |
| 1793 | #endif |
| 1794 | } |
| 1795 | \f |
| 1796 | /* Re-read symbols if a symbol-file has changed. */ |
| 1797 | void |
| 1798 | reread_symbols (void) |
| 1799 | { |
| 1800 | struct objfile *objfile; |
| 1801 | long new_modtime; |
| 1802 | int reread_one = 0; |
| 1803 | struct stat new_statbuf; |
| 1804 | int res; |
| 1805 | |
| 1806 | /* With the addition of shared libraries, this should be modified, |
| 1807 | the load time should be saved in the partial symbol tables, since |
| 1808 | different tables may come from different source files. FIXME. |
| 1809 | This routine should then walk down each partial symbol table |
| 1810 | and see if the symbol table that it originates from has been changed */ |
| 1811 | |
| 1812 | for (objfile = object_files; objfile; objfile = objfile->next) |
| 1813 | { |
| 1814 | if (objfile->obfd) |
| 1815 | { |
| 1816 | #ifdef DEPRECATED_IBM6000_TARGET |
| 1817 | /* If this object is from a shared library, then you should |
| 1818 | stat on the library name, not member name. */ |
| 1819 | |
| 1820 | if (objfile->obfd->my_archive) |
| 1821 | res = stat (objfile->obfd->my_archive->filename, &new_statbuf); |
| 1822 | else |
| 1823 | #endif |
| 1824 | res = stat (objfile->name, &new_statbuf); |
| 1825 | if (res != 0) |
| 1826 | { |
| 1827 | /* FIXME, should use print_sys_errmsg but it's not filtered. */ |
| 1828 | printf_unfiltered ("`%s' has disappeared; keeping its symbols.\n", |
| 1829 | objfile->name); |
| 1830 | continue; |
| 1831 | } |
| 1832 | new_modtime = new_statbuf.st_mtime; |
| 1833 | if (new_modtime != objfile->mtime) |
| 1834 | { |
| 1835 | struct cleanup *old_cleanups; |
| 1836 | struct section_offsets *offsets; |
| 1837 | int num_offsets; |
| 1838 | char *obfd_filename; |
| 1839 | |
| 1840 | printf_unfiltered ("`%s' has changed; re-reading symbols.\n", |
| 1841 | objfile->name); |
| 1842 | |
| 1843 | /* There are various functions like symbol_file_add, |
| 1844 | symfile_bfd_open, syms_from_objfile, etc., which might |
| 1845 | appear to do what we want. But they have various other |
| 1846 | effects which we *don't* want. So we just do stuff |
| 1847 | ourselves. We don't worry about mapped files (for one thing, |
| 1848 | any mapped file will be out of date). */ |
| 1849 | |
| 1850 | /* If we get an error, blow away this objfile (not sure if |
| 1851 | that is the correct response for things like shared |
| 1852 | libraries). */ |
| 1853 | old_cleanups = make_cleanup_free_objfile (objfile); |
| 1854 | /* We need to do this whenever any symbols go away. */ |
| 1855 | make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/); |
| 1856 | |
| 1857 | /* Clean up any state BFD has sitting around. We don't need |
| 1858 | to close the descriptor but BFD lacks a way of closing the |
| 1859 | BFD without closing the descriptor. */ |
| 1860 | obfd_filename = bfd_get_filename (objfile->obfd); |
| 1861 | if (!bfd_close (objfile->obfd)) |
| 1862 | error ("Can't close BFD for %s: %s", objfile->name, |
| 1863 | bfd_errmsg (bfd_get_error ())); |
| 1864 | objfile->obfd = bfd_openr (obfd_filename, gnutarget); |
| 1865 | if (objfile->obfd == NULL) |
| 1866 | error ("Can't open %s to read symbols.", objfile->name); |
| 1867 | /* bfd_openr sets cacheable to true, which is what we want. */ |
| 1868 | if (!bfd_check_format (objfile->obfd, bfd_object)) |
| 1869 | error ("Can't read symbols from %s: %s.", objfile->name, |
| 1870 | bfd_errmsg (bfd_get_error ())); |
| 1871 | |
| 1872 | /* Save the offsets, we will nuke them with the rest of the |
| 1873 | objfile_obstack. */ |
| 1874 | num_offsets = objfile->num_sections; |
| 1875 | offsets = ((struct section_offsets *) |
| 1876 | alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets))); |
| 1877 | memcpy (offsets, objfile->section_offsets, |
| 1878 | SIZEOF_N_SECTION_OFFSETS (num_offsets)); |
| 1879 | |
| 1880 | /* Nuke all the state that we will re-read. Much of the following |
| 1881 | code which sets things to NULL really is necessary to tell |
| 1882 | other parts of GDB that there is nothing currently there. */ |
| 1883 | |
| 1884 | /* FIXME: Do we have to free a whole linked list, or is this |
| 1885 | enough? */ |
| 1886 | if (objfile->global_psymbols.list) |
| 1887 | xfree (objfile->global_psymbols.list); |
| 1888 | memset (&objfile->global_psymbols, 0, |
| 1889 | sizeof (objfile->global_psymbols)); |
| 1890 | if (objfile->static_psymbols.list) |
| 1891 | xfree (objfile->static_psymbols.list); |
| 1892 | memset (&objfile->static_psymbols, 0, |
| 1893 | sizeof (objfile->static_psymbols)); |
| 1894 | |
| 1895 | /* Free the obstacks for non-reusable objfiles */ |
| 1896 | bcache_xfree (objfile->psymbol_cache); |
| 1897 | objfile->psymbol_cache = bcache_xmalloc (); |
| 1898 | bcache_xfree (objfile->macro_cache); |
| 1899 | objfile->macro_cache = bcache_xmalloc (); |
| 1900 | if (objfile->demangled_names_hash != NULL) |
| 1901 | { |
| 1902 | htab_delete (objfile->demangled_names_hash); |
| 1903 | objfile->demangled_names_hash = NULL; |
| 1904 | } |
| 1905 | obstack_free (&objfile->objfile_obstack, 0); |
| 1906 | objfile->sections = NULL; |
| 1907 | objfile->symtabs = NULL; |
| 1908 | objfile->psymtabs = NULL; |
| 1909 | objfile->free_psymtabs = NULL; |
| 1910 | objfile->cp_namespace_symtab = NULL; |
| 1911 | objfile->msymbols = NULL; |
| 1912 | objfile->sym_private = NULL; |
| 1913 | objfile->minimal_symbol_count = 0; |
| 1914 | memset (&objfile->msymbol_hash, 0, |
| 1915 | sizeof (objfile->msymbol_hash)); |
| 1916 | memset (&objfile->msymbol_demangled_hash, 0, |
| 1917 | sizeof (objfile->msymbol_demangled_hash)); |
| 1918 | objfile->fundamental_types = NULL; |
| 1919 | clear_objfile_data (objfile); |
| 1920 | if (objfile->sf != NULL) |
| 1921 | { |
| 1922 | (*objfile->sf->sym_finish) (objfile); |
| 1923 | } |
| 1924 | |
| 1925 | /* We never make this a mapped file. */ |
| 1926 | objfile->md = NULL; |
| 1927 | objfile->psymbol_cache = bcache_xmalloc (); |
| 1928 | objfile->macro_cache = bcache_xmalloc (); |
| 1929 | /* obstack_init also initializes the obstack so it is |
| 1930 | empty. We could use obstack_specify_allocation but |
| 1931 | gdb_obstack.h specifies the alloc/dealloc |
| 1932 | functions. */ |
| 1933 | obstack_init (&objfile->objfile_obstack); |
| 1934 | if (build_objfile_section_table (objfile)) |
| 1935 | { |
| 1936 | error ("Can't find the file sections in `%s': %s", |
| 1937 | objfile->name, bfd_errmsg (bfd_get_error ())); |
| 1938 | } |
| 1939 | terminate_minimal_symbol_table (objfile); |
| 1940 | |
| 1941 | /* We use the same section offsets as from last time. I'm not |
| 1942 | sure whether that is always correct for shared libraries. */ |
| 1943 | objfile->section_offsets = (struct section_offsets *) |
| 1944 | obstack_alloc (&objfile->objfile_obstack, |
| 1945 | SIZEOF_N_SECTION_OFFSETS (num_offsets)); |
| 1946 | memcpy (objfile->section_offsets, offsets, |
| 1947 | SIZEOF_N_SECTION_OFFSETS (num_offsets)); |
| 1948 | objfile->num_sections = num_offsets; |
| 1949 | |
| 1950 | /* What the hell is sym_new_init for, anyway? The concept of |
| 1951 | distinguishing between the main file and additional files |
| 1952 | in this way seems rather dubious. */ |
| 1953 | if (objfile == symfile_objfile) |
| 1954 | { |
| 1955 | (*objfile->sf->sym_new_init) (objfile); |
| 1956 | } |
| 1957 | |
| 1958 | (*objfile->sf->sym_init) (objfile); |
| 1959 | clear_complaints (&symfile_complaints, 1, 1); |
| 1960 | /* The "mainline" parameter is a hideous hack; I think leaving it |
| 1961 | zero is OK since dbxread.c also does what it needs to do if |
| 1962 | objfile->global_psymbols.size is 0. */ |
| 1963 | (*objfile->sf->sym_read) (objfile, 0); |
| 1964 | if (!have_partial_symbols () && !have_full_symbols ()) |
| 1965 | { |
| 1966 | wrap_here (""); |
| 1967 | printf_unfiltered ("(no debugging symbols found)\n"); |
| 1968 | wrap_here (""); |
| 1969 | } |
| 1970 | objfile->flags |= OBJF_SYMS; |
| 1971 | |
| 1972 | /* We're done reading the symbol file; finish off complaints. */ |
| 1973 | clear_complaints (&symfile_complaints, 0, 1); |
| 1974 | |
| 1975 | /* Getting new symbols may change our opinion about what is |
| 1976 | frameless. */ |
| 1977 | |
| 1978 | reinit_frame_cache (); |
| 1979 | |
| 1980 | /* Discard cleanups as symbol reading was successful. */ |
| 1981 | discard_cleanups (old_cleanups); |
| 1982 | |
| 1983 | /* If the mtime has changed between the time we set new_modtime |
| 1984 | and now, we *want* this to be out of date, so don't call stat |
| 1985 | again now. */ |
| 1986 | objfile->mtime = new_modtime; |
| 1987 | reread_one = 1; |
| 1988 | reread_separate_symbols (objfile); |
| 1989 | } |
| 1990 | } |
| 1991 | } |
| 1992 | |
| 1993 | if (reread_one) |
| 1994 | clear_symtab_users (); |
| 1995 | } |
| 1996 | |
| 1997 | |
| 1998 | /* Handle separate debug info for OBJFILE, which has just been |
| 1999 | re-read: |
| 2000 | - If we had separate debug info before, but now we don't, get rid |
| 2001 | of the separated objfile. |
| 2002 | - If we didn't have separated debug info before, but now we do, |
| 2003 | read in the new separated debug info file. |
| 2004 | - If the debug link points to a different file, toss the old one |
| 2005 | and read the new one. |
| 2006 | This function does *not* handle the case where objfile is still |
| 2007 | using the same separate debug info file, but that file's timestamp |
| 2008 | has changed. That case should be handled by the loop in |
| 2009 | reread_symbols already. */ |
| 2010 | static void |
| 2011 | reread_separate_symbols (struct objfile *objfile) |
| 2012 | { |
| 2013 | char *debug_file; |
| 2014 | unsigned long crc32; |
| 2015 | |
| 2016 | /* Does the updated objfile's debug info live in a |
| 2017 | separate file? */ |
| 2018 | debug_file = find_separate_debug_file (objfile); |
| 2019 | |
| 2020 | if (objfile->separate_debug_objfile) |
| 2021 | { |
| 2022 | /* There are two cases where we need to get rid of |
| 2023 | the old separated debug info objfile: |
| 2024 | - if the new primary objfile doesn't have |
| 2025 | separated debug info, or |
| 2026 | - if the new primary objfile has separate debug |
| 2027 | info, but it's under a different filename. |
| 2028 | |
| 2029 | If the old and new objfiles both have separate |
| 2030 | debug info, under the same filename, then we're |
| 2031 | okay --- if the separated file's contents have |
| 2032 | changed, we will have caught that when we |
| 2033 | visited it in this function's outermost |
| 2034 | loop. */ |
| 2035 | if (! debug_file |
| 2036 | || strcmp (debug_file, objfile->separate_debug_objfile->name) != 0) |
| 2037 | free_objfile (objfile->separate_debug_objfile); |
| 2038 | } |
| 2039 | |
| 2040 | /* If the new objfile has separate debug info, and we |
| 2041 | haven't loaded it already, do so now. */ |
| 2042 | if (debug_file |
| 2043 | && ! objfile->separate_debug_objfile) |
| 2044 | { |
| 2045 | /* Use the same section offset table as objfile itself. |
| 2046 | Preserve the flags from objfile that make sense. */ |
| 2047 | objfile->separate_debug_objfile |
| 2048 | = (symbol_file_add_with_addrs_or_offsets |
| 2049 | (symfile_bfd_open (debug_file), |
| 2050 | info_verbose, /* from_tty: Don't override the default. */ |
| 2051 | 0, /* No addr table. */ |
| 2052 | objfile->section_offsets, objfile->num_sections, |
| 2053 | 0, /* Not mainline. See comments about this above. */ |
| 2054 | objfile->flags & (OBJF_REORDERED | OBJF_SHARED | OBJF_READNOW |
| 2055 | | OBJF_USERLOADED))); |
| 2056 | objfile->separate_debug_objfile->separate_debug_objfile_backlink |
| 2057 | = objfile; |
| 2058 | } |
| 2059 | } |
| 2060 | |
| 2061 | |
| 2062 | \f |
| 2063 | |
| 2064 | |
| 2065 | typedef struct |
| 2066 | { |
| 2067 | char *ext; |
| 2068 | enum language lang; |
| 2069 | } |
| 2070 | filename_language; |
| 2071 | |
| 2072 | static filename_language *filename_language_table; |
| 2073 | static int fl_table_size, fl_table_next; |
| 2074 | |
| 2075 | static void |
| 2076 | add_filename_language (char *ext, enum language lang) |
| 2077 | { |
| 2078 | if (fl_table_next >= fl_table_size) |
| 2079 | { |
| 2080 | fl_table_size += 10; |
| 2081 | filename_language_table = |
| 2082 | xrealloc (filename_language_table, |
| 2083 | fl_table_size * sizeof (*filename_language_table)); |
| 2084 | } |
| 2085 | |
| 2086 | filename_language_table[fl_table_next].ext = xstrdup (ext); |
| 2087 | filename_language_table[fl_table_next].lang = lang; |
| 2088 | fl_table_next++; |
| 2089 | } |
| 2090 | |
| 2091 | static char *ext_args; |
| 2092 | |
| 2093 | static void |
| 2094 | set_ext_lang_command (char *args, int from_tty) |
| 2095 | { |
| 2096 | int i; |
| 2097 | char *cp = ext_args; |
| 2098 | enum language lang; |
| 2099 | |
| 2100 | /* First arg is filename extension, starting with '.' */ |
| 2101 | if (*cp != '.') |
| 2102 | error ("'%s': Filename extension must begin with '.'", ext_args); |
| 2103 | |
| 2104 | /* Find end of first arg. */ |
| 2105 | while (*cp && !isspace (*cp)) |
| 2106 | cp++; |
| 2107 | |
| 2108 | if (*cp == '\0') |
| 2109 | error ("'%s': two arguments required -- filename extension and language", |
| 2110 | ext_args); |
| 2111 | |
| 2112 | /* Null-terminate first arg */ |
| 2113 | *cp++ = '\0'; |
| 2114 | |
| 2115 | /* Find beginning of second arg, which should be a source language. */ |
| 2116 | while (*cp && isspace (*cp)) |
| 2117 | cp++; |
| 2118 | |
| 2119 | if (*cp == '\0') |
| 2120 | error ("'%s': two arguments required -- filename extension and language", |
| 2121 | ext_args); |
| 2122 | |
| 2123 | /* Lookup the language from among those we know. */ |
| 2124 | lang = language_enum (cp); |
| 2125 | |
| 2126 | /* Now lookup the filename extension: do we already know it? */ |
| 2127 | for (i = 0; i < fl_table_next; i++) |
| 2128 | if (0 == strcmp (ext_args, filename_language_table[i].ext)) |
| 2129 | break; |
| 2130 | |
| 2131 | if (i >= fl_table_next) |
| 2132 | { |
| 2133 | /* new file extension */ |
| 2134 | add_filename_language (ext_args, lang); |
| 2135 | } |
| 2136 | else |
| 2137 | { |
| 2138 | /* redefining a previously known filename extension */ |
| 2139 | |
| 2140 | /* if (from_tty) */ |
| 2141 | /* query ("Really make files of type %s '%s'?", */ |
| 2142 | /* ext_args, language_str (lang)); */ |
| 2143 | |
| 2144 | xfree (filename_language_table[i].ext); |
| 2145 | filename_language_table[i].ext = xstrdup (ext_args); |
| 2146 | filename_language_table[i].lang = lang; |
| 2147 | } |
| 2148 | } |
| 2149 | |
| 2150 | static void |
| 2151 | info_ext_lang_command (char *args, int from_tty) |
| 2152 | { |
| 2153 | int i; |
| 2154 | |
| 2155 | printf_filtered ("Filename extensions and the languages they represent:"); |
| 2156 | printf_filtered ("\n\n"); |
| 2157 | for (i = 0; i < fl_table_next; i++) |
| 2158 | printf_filtered ("\t%s\t- %s\n", |
| 2159 | filename_language_table[i].ext, |
| 2160 | language_str (filename_language_table[i].lang)); |
| 2161 | } |
| 2162 | |
| 2163 | static void |
| 2164 | init_filename_language_table (void) |
| 2165 | { |
| 2166 | if (fl_table_size == 0) /* protect against repetition */ |
| 2167 | { |
| 2168 | fl_table_size = 20; |
| 2169 | fl_table_next = 0; |
| 2170 | filename_language_table = |
| 2171 | xmalloc (fl_table_size * sizeof (*filename_language_table)); |
| 2172 | add_filename_language (".c", language_c); |
| 2173 | add_filename_language (".C", language_cplus); |
| 2174 | add_filename_language (".cc", language_cplus); |
| 2175 | add_filename_language (".cp", language_cplus); |
| 2176 | add_filename_language (".cpp", language_cplus); |
| 2177 | add_filename_language (".cxx", language_cplus); |
| 2178 | add_filename_language (".c++", language_cplus); |
| 2179 | add_filename_language (".java", language_java); |
| 2180 | add_filename_language (".class", language_java); |
| 2181 | add_filename_language (".m", language_objc); |
| 2182 | add_filename_language (".f", language_fortran); |
| 2183 | add_filename_language (".F", language_fortran); |
| 2184 | add_filename_language (".s", language_asm); |
| 2185 | add_filename_language (".S", language_asm); |
| 2186 | add_filename_language (".pas", language_pascal); |
| 2187 | add_filename_language (".p", language_pascal); |
| 2188 | add_filename_language (".pp", language_pascal); |
| 2189 | } |
| 2190 | } |
| 2191 | |
| 2192 | enum language |
| 2193 | deduce_language_from_filename (char *filename) |
| 2194 | { |
| 2195 | int i; |
| 2196 | char *cp; |
| 2197 | |
| 2198 | if (filename != NULL) |
| 2199 | if ((cp = strrchr (filename, '.')) != NULL) |
| 2200 | for (i = 0; i < fl_table_next; i++) |
| 2201 | if (strcmp (cp, filename_language_table[i].ext) == 0) |
| 2202 | return filename_language_table[i].lang; |
| 2203 | |
| 2204 | return language_unknown; |
| 2205 | } |
| 2206 | \f |
| 2207 | /* allocate_symtab: |
| 2208 | |
| 2209 | Allocate and partly initialize a new symbol table. Return a pointer |
| 2210 | to it. error() if no space. |
| 2211 | |
| 2212 | Caller must set these fields: |
| 2213 | LINETABLE(symtab) |
| 2214 | symtab->blockvector |
| 2215 | symtab->dirname |
| 2216 | symtab->free_code |
| 2217 | symtab->free_ptr |
| 2218 | possibly free_named_symtabs (symtab->filename); |
| 2219 | */ |
| 2220 | |
| 2221 | struct symtab * |
| 2222 | allocate_symtab (char *filename, struct objfile *objfile) |
| 2223 | { |
| 2224 | struct symtab *symtab; |
| 2225 | |
| 2226 | symtab = (struct symtab *) |
| 2227 | obstack_alloc (&objfile->objfile_obstack, sizeof (struct symtab)); |
| 2228 | memset (symtab, 0, sizeof (*symtab)); |
| 2229 | symtab->filename = obsavestring (filename, strlen (filename), |
| 2230 | &objfile->objfile_obstack); |
| 2231 | symtab->fullname = NULL; |
| 2232 | symtab->language = deduce_language_from_filename (filename); |
| 2233 | symtab->debugformat = obsavestring ("unknown", 7, |
| 2234 | &objfile->objfile_obstack); |
| 2235 | |
| 2236 | /* Hook it to the objfile it comes from */ |
| 2237 | |
| 2238 | symtab->objfile = objfile; |
| 2239 | symtab->next = objfile->symtabs; |
| 2240 | objfile->symtabs = symtab; |
| 2241 | |
| 2242 | /* FIXME: This should go away. It is only defined for the Z8000, |
| 2243 | and the Z8000 definition of this macro doesn't have anything to |
| 2244 | do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just |
| 2245 | here for convenience. */ |
| 2246 | #ifdef INIT_EXTRA_SYMTAB_INFO |
| 2247 | INIT_EXTRA_SYMTAB_INFO (symtab); |
| 2248 | #endif |
| 2249 | |
| 2250 | return (symtab); |
| 2251 | } |
| 2252 | |
| 2253 | struct partial_symtab * |
| 2254 | allocate_psymtab (char *filename, struct objfile *objfile) |
| 2255 | { |
| 2256 | struct partial_symtab *psymtab; |
| 2257 | |
| 2258 | if (objfile->free_psymtabs) |
| 2259 | { |
| 2260 | psymtab = objfile->free_psymtabs; |
| 2261 | objfile->free_psymtabs = psymtab->next; |
| 2262 | } |
| 2263 | else |
| 2264 | psymtab = (struct partial_symtab *) |
| 2265 | obstack_alloc (&objfile->objfile_obstack, |
| 2266 | sizeof (struct partial_symtab)); |
| 2267 | |
| 2268 | memset (psymtab, 0, sizeof (struct partial_symtab)); |
| 2269 | psymtab->filename = obsavestring (filename, strlen (filename), |
| 2270 | &objfile->objfile_obstack); |
| 2271 | psymtab->symtab = NULL; |
| 2272 | |
| 2273 | /* Prepend it to the psymtab list for the objfile it belongs to. |
| 2274 | Psymtabs are searched in most recent inserted -> least recent |
| 2275 | inserted order. */ |
| 2276 | |
| 2277 | psymtab->objfile = objfile; |
| 2278 | psymtab->next = objfile->psymtabs; |
| 2279 | objfile->psymtabs = psymtab; |
| 2280 | #if 0 |
| 2281 | { |
| 2282 | struct partial_symtab **prev_pst; |
| 2283 | psymtab->objfile = objfile; |
| 2284 | psymtab->next = NULL; |
| 2285 | prev_pst = &(objfile->psymtabs); |
| 2286 | while ((*prev_pst) != NULL) |
| 2287 | prev_pst = &((*prev_pst)->next); |
| 2288 | (*prev_pst) = psymtab; |
| 2289 | } |
| 2290 | #endif |
| 2291 | |
| 2292 | return (psymtab); |
| 2293 | } |
| 2294 | |
| 2295 | void |
| 2296 | discard_psymtab (struct partial_symtab *pst) |
| 2297 | { |
| 2298 | struct partial_symtab **prev_pst; |
| 2299 | |
| 2300 | /* From dbxread.c: |
| 2301 | Empty psymtabs happen as a result of header files which don't |
| 2302 | have any symbols in them. There can be a lot of them. But this |
| 2303 | check is wrong, in that a psymtab with N_SLINE entries but |
| 2304 | nothing else is not empty, but we don't realize that. Fixing |
| 2305 | that without slowing things down might be tricky. */ |
| 2306 | |
| 2307 | /* First, snip it out of the psymtab chain */ |
| 2308 | |
| 2309 | prev_pst = &(pst->objfile->psymtabs); |
| 2310 | while ((*prev_pst) != pst) |
| 2311 | prev_pst = &((*prev_pst)->next); |
| 2312 | (*prev_pst) = pst->next; |
| 2313 | |
| 2314 | /* Next, put it on a free list for recycling */ |
| 2315 | |
| 2316 | pst->next = pst->objfile->free_psymtabs; |
| 2317 | pst->objfile->free_psymtabs = pst; |
| 2318 | } |
| 2319 | \f |
| 2320 | |
| 2321 | /* Reset all data structures in gdb which may contain references to symbol |
| 2322 | table data. */ |
| 2323 | |
| 2324 | void |
| 2325 | clear_symtab_users (void) |
| 2326 | { |
| 2327 | /* Someday, we should do better than this, by only blowing away |
| 2328 | the things that really need to be blown. */ |
| 2329 | clear_value_history (); |
| 2330 | clear_displays (); |
| 2331 | clear_internalvars (); |
| 2332 | breakpoint_re_set (); |
| 2333 | set_default_breakpoint (0, 0, 0, 0); |
| 2334 | clear_current_source_symtab_and_line (); |
| 2335 | clear_pc_function_cache (); |
| 2336 | if (deprecated_target_new_objfile_hook) |
| 2337 | deprecated_target_new_objfile_hook (NULL); |
| 2338 | } |
| 2339 | |
| 2340 | static void |
| 2341 | clear_symtab_users_cleanup (void *ignore) |
| 2342 | { |
| 2343 | clear_symtab_users (); |
| 2344 | } |
| 2345 | |
| 2346 | /* clear_symtab_users_once: |
| 2347 | |
| 2348 | This function is run after symbol reading, or from a cleanup. |
| 2349 | If an old symbol table was obsoleted, the old symbol table |
| 2350 | has been blown away, but the other GDB data structures that may |
| 2351 | reference it have not yet been cleared or re-directed. (The old |
| 2352 | symtab was zapped, and the cleanup queued, in free_named_symtab() |
| 2353 | below.) |
| 2354 | |
| 2355 | This function can be queued N times as a cleanup, or called |
| 2356 | directly; it will do all the work the first time, and then will be a |
| 2357 | no-op until the next time it is queued. This works by bumping a |
| 2358 | counter at queueing time. Much later when the cleanup is run, or at |
| 2359 | the end of symbol processing (in case the cleanup is discarded), if |
| 2360 | the queued count is greater than the "done-count", we do the work |
| 2361 | and set the done-count to the queued count. If the queued count is |
| 2362 | less than or equal to the done-count, we just ignore the call. This |
| 2363 | is needed because reading a single .o file will often replace many |
| 2364 | symtabs (one per .h file, for example), and we don't want to reset |
| 2365 | the breakpoints N times in the user's face. |
| 2366 | |
| 2367 | The reason we both queue a cleanup, and call it directly after symbol |
| 2368 | reading, is because the cleanup protects us in case of errors, but is |
| 2369 | discarded if symbol reading is successful. */ |
| 2370 | |
| 2371 | #if 0 |
| 2372 | /* FIXME: As free_named_symtabs is currently a big noop this function |
| 2373 | is no longer needed. */ |
| 2374 | static void clear_symtab_users_once (void); |
| 2375 | |
| 2376 | static int clear_symtab_users_queued; |
| 2377 | static int clear_symtab_users_done; |
| 2378 | |
| 2379 | static void |
| 2380 | clear_symtab_users_once (void) |
| 2381 | { |
| 2382 | /* Enforce once-per-`do_cleanups'-semantics */ |
| 2383 | if (clear_symtab_users_queued <= clear_symtab_users_done) |
| 2384 | return; |
| 2385 | clear_symtab_users_done = clear_symtab_users_queued; |
| 2386 | |
| 2387 | clear_symtab_users (); |
| 2388 | } |
| 2389 | #endif |
| 2390 | |
| 2391 | /* Delete the specified psymtab, and any others that reference it. */ |
| 2392 | |
| 2393 | static void |
| 2394 | cashier_psymtab (struct partial_symtab *pst) |
| 2395 | { |
| 2396 | struct partial_symtab *ps, *pprev = NULL; |
| 2397 | int i; |
| 2398 | |
| 2399 | /* Find its previous psymtab in the chain */ |
| 2400 | for (ps = pst->objfile->psymtabs; ps; ps = ps->next) |
| 2401 | { |
| 2402 | if (ps == pst) |
| 2403 | break; |
| 2404 | pprev = ps; |
| 2405 | } |
| 2406 | |
| 2407 | if (ps) |
| 2408 | { |
| 2409 | /* Unhook it from the chain. */ |
| 2410 | if (ps == pst->objfile->psymtabs) |
| 2411 | pst->objfile->psymtabs = ps->next; |
| 2412 | else |
| 2413 | pprev->next = ps->next; |
| 2414 | |
| 2415 | /* FIXME, we can't conveniently deallocate the entries in the |
| 2416 | partial_symbol lists (global_psymbols/static_psymbols) that |
| 2417 | this psymtab points to. These just take up space until all |
| 2418 | the psymtabs are reclaimed. Ditto the dependencies list and |
| 2419 | filename, which are all in the objfile_obstack. */ |
| 2420 | |
| 2421 | /* We need to cashier any psymtab that has this one as a dependency... */ |
| 2422 | again: |
| 2423 | for (ps = pst->objfile->psymtabs; ps; ps = ps->next) |
| 2424 | { |
| 2425 | for (i = 0; i < ps->number_of_dependencies; i++) |
| 2426 | { |
| 2427 | if (ps->dependencies[i] == pst) |
| 2428 | { |
| 2429 | cashier_psymtab (ps); |
| 2430 | goto again; /* Must restart, chain has been munged. */ |
| 2431 | } |
| 2432 | } |
| 2433 | } |
| 2434 | } |
| 2435 | } |
| 2436 | |
| 2437 | /* If a symtab or psymtab for filename NAME is found, free it along |
| 2438 | with any dependent breakpoints, displays, etc. |
| 2439 | Used when loading new versions of object modules with the "add-file" |
| 2440 | command. This is only called on the top-level symtab or psymtab's name; |
| 2441 | it is not called for subsidiary files such as .h files. |
| 2442 | |
| 2443 | Return value is 1 if we blew away the environment, 0 if not. |
| 2444 | FIXME. The return value appears to never be used. |
| 2445 | |
| 2446 | FIXME. I think this is not the best way to do this. We should |
| 2447 | work on being gentler to the environment while still cleaning up |
| 2448 | all stray pointers into the freed symtab. */ |
| 2449 | |
| 2450 | int |
| 2451 | free_named_symtabs (char *name) |
| 2452 | { |
| 2453 | #if 0 |
| 2454 | /* FIXME: With the new method of each objfile having it's own |
| 2455 | psymtab list, this function needs serious rethinking. In particular, |
| 2456 | why was it ever necessary to toss psymtabs with specific compilation |
| 2457 | unit filenames, as opposed to all psymtabs from a particular symbol |
| 2458 | file? -- fnf |
| 2459 | Well, the answer is that some systems permit reloading of particular |
| 2460 | compilation units. We want to blow away any old info about these |
| 2461 | compilation units, regardless of which objfiles they arrived in. --gnu. */ |
| 2462 | |
| 2463 | struct symtab *s; |
| 2464 | struct symtab *prev; |
| 2465 | struct partial_symtab *ps; |
| 2466 | struct blockvector *bv; |
| 2467 | int blewit = 0; |
| 2468 | |
| 2469 | /* We only wack things if the symbol-reload switch is set. */ |
| 2470 | if (!symbol_reloading) |
| 2471 | return 0; |
| 2472 | |
| 2473 | /* Some symbol formats have trouble providing file names... */ |
| 2474 | if (name == 0 || *name == '\0') |
| 2475 | return 0; |
| 2476 | |
| 2477 | /* Look for a psymtab with the specified name. */ |
| 2478 | |
| 2479 | again2: |
| 2480 | for (ps = partial_symtab_list; ps; ps = ps->next) |
| 2481 | { |
| 2482 | if (strcmp (name, ps->filename) == 0) |
| 2483 | { |
| 2484 | cashier_psymtab (ps); /* Blow it away...and its little dog, too. */ |
| 2485 | goto again2; /* Must restart, chain has been munged */ |
| 2486 | } |
| 2487 | } |
| 2488 | |
| 2489 | /* Look for a symtab with the specified name. */ |
| 2490 | |
| 2491 | for (s = symtab_list; s; s = s->next) |
| 2492 | { |
| 2493 | if (strcmp (name, s->filename) == 0) |
| 2494 | break; |
| 2495 | prev = s; |
| 2496 | } |
| 2497 | |
| 2498 | if (s) |
| 2499 | { |
| 2500 | if (s == symtab_list) |
| 2501 | symtab_list = s->next; |
| 2502 | else |
| 2503 | prev->next = s->next; |
| 2504 | |
| 2505 | /* For now, queue a delete for all breakpoints, displays, etc., whether |
| 2506 | or not they depend on the symtab being freed. This should be |
| 2507 | changed so that only those data structures affected are deleted. */ |
| 2508 | |
| 2509 | /* But don't delete anything if the symtab is empty. |
| 2510 | This test is necessary due to a bug in "dbxread.c" that |
| 2511 | causes empty symtabs to be created for N_SO symbols that |
| 2512 | contain the pathname of the object file. (This problem |
| 2513 | has been fixed in GDB 3.9x). */ |
| 2514 | |
| 2515 | bv = BLOCKVECTOR (s); |
| 2516 | if (BLOCKVECTOR_NBLOCKS (bv) > 2 |
| 2517 | || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) |
| 2518 | || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK))) |
| 2519 | { |
| 2520 | complaint (&symfile_complaints, "Replacing old symbols for `%s'", |
| 2521 | name); |
| 2522 | clear_symtab_users_queued++; |
| 2523 | make_cleanup (clear_symtab_users_once, 0); |
| 2524 | blewit = 1; |
| 2525 | } |
| 2526 | else |
| 2527 | { |
| 2528 | complaint (&symfile_complaints, "Empty symbol table found for `%s'", |
| 2529 | name); |
| 2530 | } |
| 2531 | |
| 2532 | free_symtab (s); |
| 2533 | } |
| 2534 | else |
| 2535 | { |
| 2536 | /* It is still possible that some breakpoints will be affected |
| 2537 | even though no symtab was found, since the file might have |
| 2538 | been compiled without debugging, and hence not be associated |
| 2539 | with a symtab. In order to handle this correctly, we would need |
| 2540 | to keep a list of text address ranges for undebuggable files. |
| 2541 | For now, we do nothing, since this is a fairly obscure case. */ |
| 2542 | ; |
| 2543 | } |
| 2544 | |
| 2545 | /* FIXME, what about the minimal symbol table? */ |
| 2546 | return blewit; |
| 2547 | #else |
| 2548 | return (0); |
| 2549 | #endif |
| 2550 | } |
| 2551 | \f |
| 2552 | /* Allocate and partially fill a partial symtab. It will be |
| 2553 | completely filled at the end of the symbol list. |
| 2554 | |
| 2555 | FILENAME is the name of the symbol-file we are reading from. */ |
| 2556 | |
| 2557 | struct partial_symtab * |
| 2558 | start_psymtab_common (struct objfile *objfile, |
| 2559 | struct section_offsets *section_offsets, char *filename, |
| 2560 | CORE_ADDR textlow, struct partial_symbol **global_syms, |
| 2561 | struct partial_symbol **static_syms) |
| 2562 | { |
| 2563 | struct partial_symtab *psymtab; |
| 2564 | |
| 2565 | psymtab = allocate_psymtab (filename, objfile); |
| 2566 | psymtab->section_offsets = section_offsets; |
| 2567 | psymtab->textlow = textlow; |
| 2568 | psymtab->texthigh = psymtab->textlow; /* default */ |
| 2569 | psymtab->globals_offset = global_syms - objfile->global_psymbols.list; |
| 2570 | psymtab->statics_offset = static_syms - objfile->static_psymbols.list; |
| 2571 | return (psymtab); |
| 2572 | } |
| 2573 | \f |
| 2574 | /* Add a symbol with a long value to a psymtab. |
| 2575 | Since one arg is a struct, we pass in a ptr and deref it (sigh). |
| 2576 | Return the partial symbol that has been added. */ |
| 2577 | |
| 2578 | /* NOTE: carlton/2003-09-11: The reason why we return the partial |
| 2579 | symbol is so that callers can get access to the symbol's demangled |
| 2580 | name, which they don't have any cheap way to determine otherwise. |
| 2581 | (Currenly, dwarf2read.c is the only file who uses that information, |
| 2582 | though it's possible that other readers might in the future.) |
| 2583 | Elena wasn't thrilled about that, and I don't blame her, but we |
| 2584 | couldn't come up with a better way to get that information. If |
| 2585 | it's needed in other situations, we could consider breaking up |
| 2586 | SYMBOL_SET_NAMES to provide access to the demangled name lookup |
| 2587 | cache. */ |
| 2588 | |
| 2589 | const struct partial_symbol * |
| 2590 | add_psymbol_to_list (char *name, int namelength, domain_enum domain, |
| 2591 | enum address_class class, |
| 2592 | struct psymbol_allocation_list *list, long val, /* Value as a long */ |
| 2593 | CORE_ADDR coreaddr, /* Value as a CORE_ADDR */ |
| 2594 | enum language language, struct objfile *objfile) |
| 2595 | { |
| 2596 | struct partial_symbol *psym; |
| 2597 | char *buf = alloca (namelength + 1); |
| 2598 | /* psymbol is static so that there will be no uninitialized gaps in the |
| 2599 | structure which might contain random data, causing cache misses in |
| 2600 | bcache. */ |
| 2601 | static struct partial_symbol psymbol; |
| 2602 | |
| 2603 | /* Create local copy of the partial symbol */ |
| 2604 | memcpy (buf, name, namelength); |
| 2605 | buf[namelength] = '\0'; |
| 2606 | /* val and coreaddr are mutually exclusive, one of them *will* be zero */ |
| 2607 | if (val != 0) |
| 2608 | { |
| 2609 | SYMBOL_VALUE (&psymbol) = val; |
| 2610 | } |
| 2611 | else |
| 2612 | { |
| 2613 | SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr; |
| 2614 | } |
| 2615 | SYMBOL_SECTION (&psymbol) = 0; |
| 2616 | SYMBOL_LANGUAGE (&psymbol) = language; |
| 2617 | PSYMBOL_DOMAIN (&psymbol) = domain; |
| 2618 | PSYMBOL_CLASS (&psymbol) = class; |
| 2619 | |
| 2620 | SYMBOL_SET_NAMES (&psymbol, buf, namelength, objfile); |
| 2621 | |
| 2622 | /* Stash the partial symbol away in the cache */ |
| 2623 | psym = deprecated_bcache (&psymbol, sizeof (struct partial_symbol), |
| 2624 | objfile->psymbol_cache); |
| 2625 | |
| 2626 | /* Save pointer to partial symbol in psymtab, growing symtab if needed. */ |
| 2627 | if (list->next >= list->list + list->size) |
| 2628 | { |
| 2629 | extend_psymbol_list (list, objfile); |
| 2630 | } |
| 2631 | *list->next++ = psym; |
| 2632 | OBJSTAT (objfile, n_psyms++); |
| 2633 | |
| 2634 | return psym; |
| 2635 | } |
| 2636 | |
| 2637 | /* Add a symbol with a long value to a psymtab. This differs from |
| 2638 | * add_psymbol_to_list above in taking both a mangled and a demangled |
| 2639 | * name. */ |
| 2640 | |
| 2641 | void |
| 2642 | add_psymbol_with_dem_name_to_list (char *name, int namelength, char *dem_name, |
| 2643 | int dem_namelength, domain_enum domain, |
| 2644 | enum address_class class, |
| 2645 | struct psymbol_allocation_list *list, long val, /* Value as a long */ |
| 2646 | CORE_ADDR coreaddr, /* Value as a CORE_ADDR */ |
| 2647 | enum language language, |
| 2648 | struct objfile *objfile) |
| 2649 | { |
| 2650 | struct partial_symbol *psym; |
| 2651 | char *buf = alloca (namelength + 1); |
| 2652 | /* psymbol is static so that there will be no uninitialized gaps in the |
| 2653 | structure which might contain random data, causing cache misses in |
| 2654 | bcache. */ |
| 2655 | static struct partial_symbol psymbol; |
| 2656 | |
| 2657 | /* Create local copy of the partial symbol */ |
| 2658 | |
| 2659 | memcpy (buf, name, namelength); |
| 2660 | buf[namelength] = '\0'; |
| 2661 | DEPRECATED_SYMBOL_NAME (&psymbol) = deprecated_bcache (buf, namelength + 1, |
| 2662 | objfile->psymbol_cache); |
| 2663 | |
| 2664 | buf = alloca (dem_namelength + 1); |
| 2665 | memcpy (buf, dem_name, dem_namelength); |
| 2666 | buf[dem_namelength] = '\0'; |
| 2667 | |
| 2668 | switch (language) |
| 2669 | { |
| 2670 | case language_c: |
| 2671 | case language_cplus: |
| 2672 | SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) = |
| 2673 | deprecated_bcache (buf, dem_namelength + 1, objfile->psymbol_cache); |
| 2674 | break; |
| 2675 | /* FIXME What should be done for the default case? Ignoring for now. */ |
| 2676 | } |
| 2677 | |
| 2678 | /* val and coreaddr are mutually exclusive, one of them *will* be zero */ |
| 2679 | if (val != 0) |
| 2680 | { |
| 2681 | SYMBOL_VALUE (&psymbol) = val; |
| 2682 | } |
| 2683 | else |
| 2684 | { |
| 2685 | SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr; |
| 2686 | } |
| 2687 | SYMBOL_SECTION (&psymbol) = 0; |
| 2688 | SYMBOL_LANGUAGE (&psymbol) = language; |
| 2689 | PSYMBOL_DOMAIN (&psymbol) = domain; |
| 2690 | PSYMBOL_CLASS (&psymbol) = class; |
| 2691 | SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language); |
| 2692 | |
| 2693 | /* Stash the partial symbol away in the cache */ |
| 2694 | psym = deprecated_bcache (&psymbol, sizeof (struct partial_symbol), |
| 2695 | objfile->psymbol_cache); |
| 2696 | |
| 2697 | /* Save pointer to partial symbol in psymtab, growing symtab if needed. */ |
| 2698 | if (list->next >= list->list + list->size) |
| 2699 | { |
| 2700 | extend_psymbol_list (list, objfile); |
| 2701 | } |
| 2702 | *list->next++ = psym; |
| 2703 | OBJSTAT (objfile, n_psyms++); |
| 2704 | } |
| 2705 | |
| 2706 | /* Initialize storage for partial symbols. */ |
| 2707 | |
| 2708 | void |
| 2709 | init_psymbol_list (struct objfile *objfile, int total_symbols) |
| 2710 | { |
| 2711 | /* Free any previously allocated psymbol lists. */ |
| 2712 | |
| 2713 | if (objfile->global_psymbols.list) |
| 2714 | { |
| 2715 | xfree (objfile->global_psymbols.list); |
| 2716 | } |
| 2717 | if (objfile->static_psymbols.list) |
| 2718 | { |
| 2719 | xfree (objfile->static_psymbols.list); |
| 2720 | } |
| 2721 | |
| 2722 | /* Current best guess is that approximately a twentieth |
| 2723 | of the total symbols (in a debugging file) are global or static |
| 2724 | oriented symbols */ |
| 2725 | |
| 2726 | objfile->global_psymbols.size = total_symbols / 10; |
| 2727 | objfile->static_psymbols.size = total_symbols / 10; |
| 2728 | |
| 2729 | if (objfile->global_psymbols.size > 0) |
| 2730 | { |
| 2731 | objfile->global_psymbols.next = |
| 2732 | objfile->global_psymbols.list = (struct partial_symbol **) |
| 2733 | xmalloc ((objfile->global_psymbols.size |
| 2734 | * sizeof (struct partial_symbol *))); |
| 2735 | } |
| 2736 | if (objfile->static_psymbols.size > 0) |
| 2737 | { |
| 2738 | objfile->static_psymbols.next = |
| 2739 | objfile->static_psymbols.list = (struct partial_symbol **) |
| 2740 | xmalloc ((objfile->static_psymbols.size |
| 2741 | * sizeof (struct partial_symbol *))); |
| 2742 | } |
| 2743 | } |
| 2744 | |
| 2745 | /* OVERLAYS: |
| 2746 | The following code implements an abstraction for debugging overlay sections. |
| 2747 | |
| 2748 | The target model is as follows: |
| 2749 | 1) The gnu linker will permit multiple sections to be mapped into the |
| 2750 | same VMA, each with its own unique LMA (or load address). |
| 2751 | 2) It is assumed that some runtime mechanism exists for mapping the |
| 2752 | sections, one by one, from the load address into the VMA address. |
| 2753 | 3) This code provides a mechanism for gdb to keep track of which |
| 2754 | sections should be considered to be mapped from the VMA to the LMA. |
| 2755 | This information is used for symbol lookup, and memory read/write. |
| 2756 | For instance, if a section has been mapped then its contents |
| 2757 | should be read from the VMA, otherwise from the LMA. |
| 2758 | |
| 2759 | Two levels of debugger support for overlays are available. One is |
| 2760 | "manual", in which the debugger relies on the user to tell it which |
| 2761 | overlays are currently mapped. This level of support is |
| 2762 | implemented entirely in the core debugger, and the information about |
| 2763 | whether a section is mapped is kept in the objfile->obj_section table. |
| 2764 | |
| 2765 | The second level of support is "automatic", and is only available if |
| 2766 | the target-specific code provides functionality to read the target's |
| 2767 | overlay mapping table, and translate its contents for the debugger |
| 2768 | (by updating the mapped state information in the obj_section tables). |
| 2769 | |
| 2770 | The interface is as follows: |
| 2771 | User commands: |
| 2772 | overlay map <name> -- tell gdb to consider this section mapped |
| 2773 | overlay unmap <name> -- tell gdb to consider this section unmapped |
| 2774 | overlay list -- list the sections that GDB thinks are mapped |
| 2775 | overlay read-target -- get the target's state of what's mapped |
| 2776 | overlay off/manual/auto -- set overlay debugging state |
| 2777 | Functional interface: |
| 2778 | find_pc_mapped_section(pc): if the pc is in the range of a mapped |
| 2779 | section, return that section. |
| 2780 | find_pc_overlay(pc): find any overlay section that contains |
| 2781 | the pc, either in its VMA or its LMA |
| 2782 | overlay_is_mapped(sect): true if overlay is marked as mapped |
| 2783 | section_is_overlay(sect): true if section's VMA != LMA |
| 2784 | pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA |
| 2785 | pc_in_unmapped_range(...): true if pc belongs to section's LMA |
| 2786 | sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap |
| 2787 | overlay_mapped_address(...): map an address from section's LMA to VMA |
| 2788 | overlay_unmapped_address(...): map an address from section's VMA to LMA |
| 2789 | symbol_overlayed_address(...): Return a "current" address for symbol: |
| 2790 | either in VMA or LMA depending on whether |
| 2791 | the symbol's section is currently mapped |
| 2792 | */ |
| 2793 | |
| 2794 | /* Overlay debugging state: */ |
| 2795 | |
| 2796 | enum overlay_debugging_state overlay_debugging = ovly_off; |
| 2797 | int overlay_cache_invalid = 0; /* True if need to refresh mapped state */ |
| 2798 | |
| 2799 | /* Target vector for refreshing overlay mapped state */ |
| 2800 | static void simple_overlay_update (struct obj_section *); |
| 2801 | void (*target_overlay_update) (struct obj_section *) = simple_overlay_update; |
| 2802 | |
| 2803 | /* Function: section_is_overlay (SECTION) |
| 2804 | Returns true if SECTION has VMA not equal to LMA, ie. |
| 2805 | SECTION is loaded at an address different from where it will "run". */ |
| 2806 | |
| 2807 | int |
| 2808 | section_is_overlay (asection *section) |
| 2809 | { |
| 2810 | /* FIXME: need bfd *, so we can use bfd_section_lma methods. */ |
| 2811 | |
| 2812 | if (overlay_debugging) |
| 2813 | if (section && section->lma != 0 && |
| 2814 | section->vma != section->lma) |
| 2815 | return 1; |
| 2816 | |
| 2817 | return 0; |
| 2818 | } |
| 2819 | |
| 2820 | /* Function: overlay_invalidate_all (void) |
| 2821 | Invalidate the mapped state of all overlay sections (mark it as stale). */ |
| 2822 | |
| 2823 | static void |
| 2824 | overlay_invalidate_all (void) |
| 2825 | { |
| 2826 | struct objfile *objfile; |
| 2827 | struct obj_section *sect; |
| 2828 | |
| 2829 | ALL_OBJSECTIONS (objfile, sect) |
| 2830 | if (section_is_overlay (sect->the_bfd_section)) |
| 2831 | sect->ovly_mapped = -1; |
| 2832 | } |
| 2833 | |
| 2834 | /* Function: overlay_is_mapped (SECTION) |
| 2835 | Returns true if section is an overlay, and is currently mapped. |
| 2836 | Private: public access is thru function section_is_mapped. |
| 2837 | |
| 2838 | Access to the ovly_mapped flag is restricted to this function, so |
| 2839 | that we can do automatic update. If the global flag |
| 2840 | OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call |
| 2841 | overlay_invalidate_all. If the mapped state of the particular |
| 2842 | section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */ |
| 2843 | |
| 2844 | static int |
| 2845 | overlay_is_mapped (struct obj_section *osect) |
| 2846 | { |
| 2847 | if (osect == 0 || !section_is_overlay (osect->the_bfd_section)) |
| 2848 | return 0; |
| 2849 | |
| 2850 | switch (overlay_debugging) |
| 2851 | { |
| 2852 | default: |
| 2853 | case ovly_off: |
| 2854 | return 0; /* overlay debugging off */ |
| 2855 | case ovly_auto: /* overlay debugging automatic */ |
| 2856 | /* Unles there is a target_overlay_update function, |
| 2857 | there's really nothing useful to do here (can't really go auto) */ |
| 2858 | if (target_overlay_update) |
| 2859 | { |
| 2860 | if (overlay_cache_invalid) |
| 2861 | { |
| 2862 | overlay_invalidate_all (); |
| 2863 | overlay_cache_invalid = 0; |
| 2864 | } |
| 2865 | if (osect->ovly_mapped == -1) |
| 2866 | (*target_overlay_update) (osect); |
| 2867 | } |
| 2868 | /* fall thru to manual case */ |
| 2869 | case ovly_on: /* overlay debugging manual */ |
| 2870 | return osect->ovly_mapped == 1; |
| 2871 | } |
| 2872 | } |
| 2873 | |
| 2874 | /* Function: section_is_mapped |
| 2875 | Returns true if section is an overlay, and is currently mapped. */ |
| 2876 | |
| 2877 | int |
| 2878 | section_is_mapped (asection *section) |
| 2879 | { |
| 2880 | struct objfile *objfile; |
| 2881 | struct obj_section *osect; |
| 2882 | |
| 2883 | if (overlay_debugging) |
| 2884 | if (section && section_is_overlay (section)) |
| 2885 | ALL_OBJSECTIONS (objfile, osect) |
| 2886 | if (osect->the_bfd_section == section) |
| 2887 | return overlay_is_mapped (osect); |
| 2888 | |
| 2889 | return 0; |
| 2890 | } |
| 2891 | |
| 2892 | /* Function: pc_in_unmapped_range |
| 2893 | If PC falls into the lma range of SECTION, return true, else false. */ |
| 2894 | |
| 2895 | CORE_ADDR |
| 2896 | pc_in_unmapped_range (CORE_ADDR pc, asection *section) |
| 2897 | { |
| 2898 | /* FIXME: need bfd *, so we can use bfd_section_lma methods. */ |
| 2899 | |
| 2900 | int size; |
| 2901 | |
| 2902 | if (overlay_debugging) |
| 2903 | if (section && section_is_overlay (section)) |
| 2904 | { |
| 2905 | size = bfd_get_section_size (section); |
| 2906 | if (section->lma <= pc && pc < section->lma + size) |
| 2907 | return 1; |
| 2908 | } |
| 2909 | return 0; |
| 2910 | } |
| 2911 | |
| 2912 | /* Function: pc_in_mapped_range |
| 2913 | If PC falls into the vma range of SECTION, return true, else false. */ |
| 2914 | |
| 2915 | CORE_ADDR |
| 2916 | pc_in_mapped_range (CORE_ADDR pc, asection *section) |
| 2917 | { |
| 2918 | /* FIXME: need bfd *, so we can use bfd_section_vma methods. */ |
| 2919 | |
| 2920 | int size; |
| 2921 | |
| 2922 | if (overlay_debugging) |
| 2923 | if (section && section_is_overlay (section)) |
| 2924 | { |
| 2925 | size = bfd_get_section_size (section); |
| 2926 | if (section->vma <= pc && pc < section->vma + size) |
| 2927 | return 1; |
| 2928 | } |
| 2929 | return 0; |
| 2930 | } |
| 2931 | |
| 2932 | |
| 2933 | /* Return true if the mapped ranges of sections A and B overlap, false |
| 2934 | otherwise. */ |
| 2935 | static int |
| 2936 | sections_overlap (asection *a, asection *b) |
| 2937 | { |
| 2938 | /* FIXME: need bfd *, so we can use bfd_section_vma methods. */ |
| 2939 | |
| 2940 | CORE_ADDR a_start = a->vma; |
| 2941 | CORE_ADDR a_end = a->vma + bfd_get_section_size (a); |
| 2942 | CORE_ADDR b_start = b->vma; |
| 2943 | CORE_ADDR b_end = b->vma + bfd_get_section_size (b); |
| 2944 | |
| 2945 | return (a_start < b_end && b_start < a_end); |
| 2946 | } |
| 2947 | |
| 2948 | /* Function: overlay_unmapped_address (PC, SECTION) |
| 2949 | Returns the address corresponding to PC in the unmapped (load) range. |
| 2950 | May be the same as PC. */ |
| 2951 | |
| 2952 | CORE_ADDR |
| 2953 | overlay_unmapped_address (CORE_ADDR pc, asection *section) |
| 2954 | { |
| 2955 | /* FIXME: need bfd *, so we can use bfd_section_lma methods. */ |
| 2956 | |
| 2957 | if (overlay_debugging) |
| 2958 | if (section && section_is_overlay (section) && |
| 2959 | pc_in_mapped_range (pc, section)) |
| 2960 | return pc + section->lma - section->vma; |
| 2961 | |
| 2962 | return pc; |
| 2963 | } |
| 2964 | |
| 2965 | /* Function: overlay_mapped_address (PC, SECTION) |
| 2966 | Returns the address corresponding to PC in the mapped (runtime) range. |
| 2967 | May be the same as PC. */ |
| 2968 | |
| 2969 | CORE_ADDR |
| 2970 | overlay_mapped_address (CORE_ADDR pc, asection *section) |
| 2971 | { |
| 2972 | /* FIXME: need bfd *, so we can use bfd_section_vma methods. */ |
| 2973 | |
| 2974 | if (overlay_debugging) |
| 2975 | if (section && section_is_overlay (section) && |
| 2976 | pc_in_unmapped_range (pc, section)) |
| 2977 | return pc + section->vma - section->lma; |
| 2978 | |
| 2979 | return pc; |
| 2980 | } |
| 2981 | |
| 2982 | |
| 2983 | /* Function: symbol_overlayed_address |
| 2984 | Return one of two addresses (relative to the VMA or to the LMA), |
| 2985 | depending on whether the section is mapped or not. */ |
| 2986 | |
| 2987 | CORE_ADDR |
| 2988 | symbol_overlayed_address (CORE_ADDR address, asection *section) |
| 2989 | { |
| 2990 | if (overlay_debugging) |
| 2991 | { |
| 2992 | /* If the symbol has no section, just return its regular address. */ |
| 2993 | if (section == 0) |
| 2994 | return address; |
| 2995 | /* If the symbol's section is not an overlay, just return its address */ |
| 2996 | if (!section_is_overlay (section)) |
| 2997 | return address; |
| 2998 | /* If the symbol's section is mapped, just return its address */ |
| 2999 | if (section_is_mapped (section)) |
| 3000 | return address; |
| 3001 | /* |
| 3002 | * HOWEVER: if the symbol is in an overlay section which is NOT mapped, |
| 3003 | * then return its LOADED address rather than its vma address!! |
| 3004 | */ |
| 3005 | return overlay_unmapped_address (address, section); |
| 3006 | } |
| 3007 | return address; |
| 3008 | } |
| 3009 | |
| 3010 | /* Function: find_pc_overlay (PC) |
| 3011 | Return the best-match overlay section for PC: |
| 3012 | If PC matches a mapped overlay section's VMA, return that section. |
| 3013 | Else if PC matches an unmapped section's VMA, return that section. |
| 3014 | Else if PC matches an unmapped section's LMA, return that section. */ |
| 3015 | |
| 3016 | asection * |
| 3017 | find_pc_overlay (CORE_ADDR pc) |
| 3018 | { |
| 3019 | struct objfile *objfile; |
| 3020 | struct obj_section *osect, *best_match = NULL; |
| 3021 | |
| 3022 | if (overlay_debugging) |
| 3023 | ALL_OBJSECTIONS (objfile, osect) |
| 3024 | if (section_is_overlay (osect->the_bfd_section)) |
| 3025 | { |
| 3026 | if (pc_in_mapped_range (pc, osect->the_bfd_section)) |
| 3027 | { |
| 3028 | if (overlay_is_mapped (osect)) |
| 3029 | return osect->the_bfd_section; |
| 3030 | else |
| 3031 | best_match = osect; |
| 3032 | } |
| 3033 | else if (pc_in_unmapped_range (pc, osect->the_bfd_section)) |
| 3034 | best_match = osect; |
| 3035 | } |
| 3036 | return best_match ? best_match->the_bfd_section : NULL; |
| 3037 | } |
| 3038 | |
| 3039 | /* Function: find_pc_mapped_section (PC) |
| 3040 | If PC falls into the VMA address range of an overlay section that is |
| 3041 | currently marked as MAPPED, return that section. Else return NULL. */ |
| 3042 | |
| 3043 | asection * |
| 3044 | find_pc_mapped_section (CORE_ADDR pc) |
| 3045 | { |
| 3046 | struct objfile *objfile; |
| 3047 | struct obj_section *osect; |
| 3048 | |
| 3049 | if (overlay_debugging) |
| 3050 | ALL_OBJSECTIONS (objfile, osect) |
| 3051 | if (pc_in_mapped_range (pc, osect->the_bfd_section) && |
| 3052 | overlay_is_mapped (osect)) |
| 3053 | return osect->the_bfd_section; |
| 3054 | |
| 3055 | return NULL; |
| 3056 | } |
| 3057 | |
| 3058 | /* Function: list_overlays_command |
| 3059 | Print a list of mapped sections and their PC ranges */ |
| 3060 | |
| 3061 | void |
| 3062 | list_overlays_command (char *args, int from_tty) |
| 3063 | { |
| 3064 | int nmapped = 0; |
| 3065 | struct objfile *objfile; |
| 3066 | struct obj_section *osect; |
| 3067 | |
| 3068 | if (overlay_debugging) |
| 3069 | ALL_OBJSECTIONS (objfile, osect) |
| 3070 | if (overlay_is_mapped (osect)) |
| 3071 | { |
| 3072 | const char *name; |
| 3073 | bfd_vma lma, vma; |
| 3074 | int size; |
| 3075 | |
| 3076 | vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section); |
| 3077 | lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section); |
| 3078 | size = bfd_get_section_size (osect->the_bfd_section); |
| 3079 | name = bfd_section_name (objfile->obfd, osect->the_bfd_section); |
| 3080 | |
| 3081 | printf_filtered ("Section %s, loaded at ", name); |
| 3082 | print_address_numeric (lma, 1, gdb_stdout); |
| 3083 | puts_filtered (" - "); |
| 3084 | print_address_numeric (lma + size, 1, gdb_stdout); |
| 3085 | printf_filtered (", mapped at "); |
| 3086 | print_address_numeric (vma, 1, gdb_stdout); |
| 3087 | puts_filtered (" - "); |
| 3088 | print_address_numeric (vma + size, 1, gdb_stdout); |
| 3089 | puts_filtered ("\n"); |
| 3090 | |
| 3091 | nmapped++; |
| 3092 | } |
| 3093 | if (nmapped == 0) |
| 3094 | printf_filtered ("No sections are mapped.\n"); |
| 3095 | } |
| 3096 | |
| 3097 | /* Function: map_overlay_command |
| 3098 | Mark the named section as mapped (ie. residing at its VMA address). */ |
| 3099 | |
| 3100 | void |
| 3101 | map_overlay_command (char *args, int from_tty) |
| 3102 | { |
| 3103 | struct objfile *objfile, *objfile2; |
| 3104 | struct obj_section *sec, *sec2; |
| 3105 | asection *bfdsec; |
| 3106 | |
| 3107 | if (!overlay_debugging) |
| 3108 | error ("\ |
| 3109 | Overlay debugging not enabled. Use either the 'overlay auto' or\n\ |
| 3110 | the 'overlay manual' command."); |
| 3111 | |
| 3112 | if (args == 0 || *args == 0) |
| 3113 | error ("Argument required: name of an overlay section"); |
| 3114 | |
| 3115 | /* First, find a section matching the user supplied argument */ |
| 3116 | ALL_OBJSECTIONS (objfile, sec) |
| 3117 | if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) |
| 3118 | { |
| 3119 | /* Now, check to see if the section is an overlay. */ |
| 3120 | bfdsec = sec->the_bfd_section; |
| 3121 | if (!section_is_overlay (bfdsec)) |
| 3122 | continue; /* not an overlay section */ |
| 3123 | |
| 3124 | /* Mark the overlay as "mapped" */ |
| 3125 | sec->ovly_mapped = 1; |
| 3126 | |
| 3127 | /* Next, make a pass and unmap any sections that are |
| 3128 | overlapped by this new section: */ |
| 3129 | ALL_OBJSECTIONS (objfile2, sec2) |
| 3130 | if (sec2->ovly_mapped |
| 3131 | && sec != sec2 |
| 3132 | && sec->the_bfd_section != sec2->the_bfd_section |
| 3133 | && sections_overlap (sec->the_bfd_section, |
| 3134 | sec2->the_bfd_section)) |
| 3135 | { |
| 3136 | if (info_verbose) |
| 3137 | printf_unfiltered ("Note: section %s unmapped by overlap\n", |
| 3138 | bfd_section_name (objfile->obfd, |
| 3139 | sec2->the_bfd_section)); |
| 3140 | sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */ |
| 3141 | } |
| 3142 | return; |
| 3143 | } |
| 3144 | error ("No overlay section called %s", args); |
| 3145 | } |
| 3146 | |
| 3147 | /* Function: unmap_overlay_command |
| 3148 | Mark the overlay section as unmapped |
| 3149 | (ie. resident in its LMA address range, rather than the VMA range). */ |
| 3150 | |
| 3151 | void |
| 3152 | unmap_overlay_command (char *args, int from_tty) |
| 3153 | { |
| 3154 | struct objfile *objfile; |
| 3155 | struct obj_section *sec; |
| 3156 | |
| 3157 | if (!overlay_debugging) |
| 3158 | error ("\ |
| 3159 | Overlay debugging not enabled. Use either the 'overlay auto' or\n\ |
| 3160 | the 'overlay manual' command."); |
| 3161 | |
| 3162 | if (args == 0 || *args == 0) |
| 3163 | error ("Argument required: name of an overlay section"); |
| 3164 | |
| 3165 | /* First, find a section matching the user supplied argument */ |
| 3166 | ALL_OBJSECTIONS (objfile, sec) |
| 3167 | if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) |
| 3168 | { |
| 3169 | if (!sec->ovly_mapped) |
| 3170 | error ("Section %s is not mapped", args); |
| 3171 | sec->ovly_mapped = 0; |
| 3172 | return; |
| 3173 | } |
| 3174 | error ("No overlay section called %s", args); |
| 3175 | } |
| 3176 | |
| 3177 | /* Function: overlay_auto_command |
| 3178 | A utility command to turn on overlay debugging. |
| 3179 | Possibly this should be done via a set/show command. */ |
| 3180 | |
| 3181 | static void |
| 3182 | overlay_auto_command (char *args, int from_tty) |
| 3183 | { |
| 3184 | overlay_debugging = ovly_auto; |
| 3185 | enable_overlay_breakpoints (); |
| 3186 | if (info_verbose) |
| 3187 | printf_unfiltered ("Automatic overlay debugging enabled."); |
| 3188 | } |
| 3189 | |
| 3190 | /* Function: overlay_manual_command |
| 3191 | A utility command to turn on overlay debugging. |
| 3192 | Possibly this should be done via a set/show command. */ |
| 3193 | |
| 3194 | static void |
| 3195 | overlay_manual_command (char *args, int from_tty) |
| 3196 | { |
| 3197 | overlay_debugging = ovly_on; |
| 3198 | disable_overlay_breakpoints (); |
| 3199 | if (info_verbose) |
| 3200 | printf_unfiltered ("Overlay debugging enabled."); |
| 3201 | } |
| 3202 | |
| 3203 | /* Function: overlay_off_command |
| 3204 | A utility command to turn on overlay debugging. |
| 3205 | Possibly this should be done via a set/show command. */ |
| 3206 | |
| 3207 | static void |
| 3208 | overlay_off_command (char *args, int from_tty) |
| 3209 | { |
| 3210 | overlay_debugging = ovly_off; |
| 3211 | disable_overlay_breakpoints (); |
| 3212 | if (info_verbose) |
| 3213 | printf_unfiltered ("Overlay debugging disabled."); |
| 3214 | } |
| 3215 | |
| 3216 | static void |
| 3217 | overlay_load_command (char *args, int from_tty) |
| 3218 | { |
| 3219 | if (target_overlay_update) |
| 3220 | (*target_overlay_update) (NULL); |
| 3221 | else |
| 3222 | error ("This target does not know how to read its overlay state."); |
| 3223 | } |
| 3224 | |
| 3225 | /* Function: overlay_command |
| 3226 | A place-holder for a mis-typed command */ |
| 3227 | |
| 3228 | /* Command list chain containing all defined "overlay" subcommands. */ |
| 3229 | struct cmd_list_element *overlaylist; |
| 3230 | |
| 3231 | static void |
| 3232 | overlay_command (char *args, int from_tty) |
| 3233 | { |
| 3234 | printf_unfiltered |
| 3235 | ("\"overlay\" must be followed by the name of an overlay command.\n"); |
| 3236 | help_list (overlaylist, "overlay ", -1, gdb_stdout); |
| 3237 | } |
| 3238 | |
| 3239 | |
| 3240 | /* Target Overlays for the "Simplest" overlay manager: |
| 3241 | |
| 3242 | This is GDB's default target overlay layer. It works with the |
| 3243 | minimal overlay manager supplied as an example by Cygnus. The |
| 3244 | entry point is via a function pointer "target_overlay_update", |
| 3245 | so targets that use a different runtime overlay manager can |
| 3246 | substitute their own overlay_update function and take over the |
| 3247 | function pointer. |
| 3248 | |
| 3249 | The overlay_update function pokes around in the target's data structures |
| 3250 | to see what overlays are mapped, and updates GDB's overlay mapping with |
| 3251 | this information. |
| 3252 | |
| 3253 | In this simple implementation, the target data structures are as follows: |
| 3254 | unsigned _novlys; /# number of overlay sections #/ |
| 3255 | unsigned _ovly_table[_novlys][4] = { |
| 3256 | {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/ |
| 3257 | {..., ..., ..., ...}, |
| 3258 | } |
| 3259 | unsigned _novly_regions; /# number of overlay regions #/ |
| 3260 | unsigned _ovly_region_table[_novly_regions][3] = { |
| 3261 | {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/ |
| 3262 | {..., ..., ...}, |
| 3263 | } |
| 3264 | These functions will attempt to update GDB's mappedness state in the |
| 3265 | symbol section table, based on the target's mappedness state. |
| 3266 | |
| 3267 | To do this, we keep a cached copy of the target's _ovly_table, and |
| 3268 | attempt to detect when the cached copy is invalidated. The main |
| 3269 | entry point is "simple_overlay_update(SECT), which looks up SECT in |
| 3270 | the cached table and re-reads only the entry for that section from |
| 3271 | the target (whenever possible). |
| 3272 | */ |
| 3273 | |
| 3274 | /* Cached, dynamically allocated copies of the target data structures: */ |
| 3275 | static unsigned (*cache_ovly_table)[4] = 0; |
| 3276 | #if 0 |
| 3277 | static unsigned (*cache_ovly_region_table)[3] = 0; |
| 3278 | #endif |
| 3279 | static unsigned cache_novlys = 0; |
| 3280 | #if 0 |
| 3281 | static unsigned cache_novly_regions = 0; |
| 3282 | #endif |
| 3283 | static CORE_ADDR cache_ovly_table_base = 0; |
| 3284 | #if 0 |
| 3285 | static CORE_ADDR cache_ovly_region_table_base = 0; |
| 3286 | #endif |
| 3287 | enum ovly_index |
| 3288 | { |
| 3289 | VMA, SIZE, LMA, MAPPED |
| 3290 | }; |
| 3291 | #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT) |
| 3292 | |
| 3293 | /* Throw away the cached copy of _ovly_table */ |
| 3294 | static void |
| 3295 | simple_free_overlay_table (void) |
| 3296 | { |
| 3297 | if (cache_ovly_table) |
| 3298 | xfree (cache_ovly_table); |
| 3299 | cache_novlys = 0; |
| 3300 | cache_ovly_table = NULL; |
| 3301 | cache_ovly_table_base = 0; |
| 3302 | } |
| 3303 | |
| 3304 | #if 0 |
| 3305 | /* Throw away the cached copy of _ovly_region_table */ |
| 3306 | static void |
| 3307 | simple_free_overlay_region_table (void) |
| 3308 | { |
| 3309 | if (cache_ovly_region_table) |
| 3310 | xfree (cache_ovly_region_table); |
| 3311 | cache_novly_regions = 0; |
| 3312 | cache_ovly_region_table = NULL; |
| 3313 | cache_ovly_region_table_base = 0; |
| 3314 | } |
| 3315 | #endif |
| 3316 | |
| 3317 | /* Read an array of ints from the target into a local buffer. |
| 3318 | Convert to host order. int LEN is number of ints */ |
| 3319 | static void |
| 3320 | read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr, int len) |
| 3321 | { |
| 3322 | /* FIXME (alloca): Not safe if array is very large. */ |
| 3323 | char *buf = alloca (len * TARGET_LONG_BYTES); |
| 3324 | int i; |
| 3325 | |
| 3326 | read_memory (memaddr, buf, len * TARGET_LONG_BYTES); |
| 3327 | for (i = 0; i < len; i++) |
| 3328 | myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf, |
| 3329 | TARGET_LONG_BYTES); |
| 3330 | } |
| 3331 | |
| 3332 | /* Find and grab a copy of the target _ovly_table |
| 3333 | (and _novlys, which is needed for the table's size) */ |
| 3334 | static int |
| 3335 | simple_read_overlay_table (void) |
| 3336 | { |
| 3337 | struct minimal_symbol *novlys_msym, *ovly_table_msym; |
| 3338 | |
| 3339 | simple_free_overlay_table (); |
| 3340 | novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL); |
| 3341 | if (! novlys_msym) |
| 3342 | { |
| 3343 | error ("Error reading inferior's overlay table: " |
| 3344 | "couldn't find `_novlys' variable\n" |
| 3345 | "in inferior. Use `overlay manual' mode."); |
| 3346 | return 0; |
| 3347 | } |
| 3348 | |
| 3349 | ovly_table_msym = lookup_minimal_symbol ("_ovly_table", NULL, NULL); |
| 3350 | if (! ovly_table_msym) |
| 3351 | { |
| 3352 | error ("Error reading inferior's overlay table: couldn't find " |
| 3353 | "`_ovly_table' array\n" |
| 3354 | "in inferior. Use `overlay manual' mode."); |
| 3355 | return 0; |
| 3356 | } |
| 3357 | |
| 3358 | cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym), 4); |
| 3359 | cache_ovly_table |
| 3360 | = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table)); |
| 3361 | cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym); |
| 3362 | read_target_long_array (cache_ovly_table_base, |
| 3363 | (int *) cache_ovly_table, |
| 3364 | cache_novlys * 4); |
| 3365 | |
| 3366 | return 1; /* SUCCESS */ |
| 3367 | } |
| 3368 | |
| 3369 | #if 0 |
| 3370 | /* Find and grab a copy of the target _ovly_region_table |
| 3371 | (and _novly_regions, which is needed for the table's size) */ |
| 3372 | static int |
| 3373 | simple_read_overlay_region_table (void) |
| 3374 | { |
| 3375 | struct minimal_symbol *msym; |
| 3376 | |
| 3377 | simple_free_overlay_region_table (); |
| 3378 | msym = lookup_minimal_symbol ("_novly_regions", NULL, NULL); |
| 3379 | if (msym != NULL) |
| 3380 | cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4); |
| 3381 | else |
| 3382 | return 0; /* failure */ |
| 3383 | cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12); |
| 3384 | if (cache_ovly_region_table != NULL) |
| 3385 | { |
| 3386 | msym = lookup_minimal_symbol ("_ovly_region_table", NULL, NULL); |
| 3387 | if (msym != NULL) |
| 3388 | { |
| 3389 | cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym); |
| 3390 | read_target_long_array (cache_ovly_region_table_base, |
| 3391 | (int *) cache_ovly_region_table, |
| 3392 | cache_novly_regions * 3); |
| 3393 | } |
| 3394 | else |
| 3395 | return 0; /* failure */ |
| 3396 | } |
| 3397 | else |
| 3398 | return 0; /* failure */ |
| 3399 | return 1; /* SUCCESS */ |
| 3400 | } |
| 3401 | #endif |
| 3402 | |
| 3403 | /* Function: simple_overlay_update_1 |
| 3404 | A helper function for simple_overlay_update. Assuming a cached copy |
| 3405 | of _ovly_table exists, look through it to find an entry whose vma, |
| 3406 | lma and size match those of OSECT. Re-read the entry and make sure |
| 3407 | it still matches OSECT (else the table may no longer be valid). |
| 3408 | Set OSECT's mapped state to match the entry. Return: 1 for |
| 3409 | success, 0 for failure. */ |
| 3410 | |
| 3411 | static int |
| 3412 | simple_overlay_update_1 (struct obj_section *osect) |
| 3413 | { |
| 3414 | int i, size; |
| 3415 | bfd *obfd = osect->objfile->obfd; |
| 3416 | asection *bsect = osect->the_bfd_section; |
| 3417 | |
| 3418 | size = bfd_get_section_size (osect->the_bfd_section); |
| 3419 | for (i = 0; i < cache_novlys; i++) |
| 3420 | if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) |
| 3421 | && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) |
| 3422 | /* && cache_ovly_table[i][SIZE] == size */ ) |
| 3423 | { |
| 3424 | read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES, |
| 3425 | (int *) cache_ovly_table[i], 4); |
| 3426 | if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) |
| 3427 | && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) |
| 3428 | /* && cache_ovly_table[i][SIZE] == size */ ) |
| 3429 | { |
| 3430 | osect->ovly_mapped = cache_ovly_table[i][MAPPED]; |
| 3431 | return 1; |
| 3432 | } |
| 3433 | else /* Warning! Warning! Target's ovly table has changed! */ |
| 3434 | return 0; |
| 3435 | } |
| 3436 | return 0; |
| 3437 | } |
| 3438 | |
| 3439 | /* Function: simple_overlay_update |
| 3440 | If OSECT is NULL, then update all sections' mapped state |
| 3441 | (after re-reading the entire target _ovly_table). |
| 3442 | If OSECT is non-NULL, then try to find a matching entry in the |
| 3443 | cached ovly_table and update only OSECT's mapped state. |
| 3444 | If a cached entry can't be found or the cache isn't valid, then |
| 3445 | re-read the entire cache, and go ahead and update all sections. */ |
| 3446 | |
| 3447 | static void |
| 3448 | simple_overlay_update (struct obj_section *osect) |
| 3449 | { |
| 3450 | struct objfile *objfile; |
| 3451 | |
| 3452 | /* Were we given an osect to look up? NULL means do all of them. */ |
| 3453 | if (osect) |
| 3454 | /* Have we got a cached copy of the target's overlay table? */ |
| 3455 | if (cache_ovly_table != NULL) |
| 3456 | /* Does its cached location match what's currently in the symtab? */ |
| 3457 | if (cache_ovly_table_base == |
| 3458 | SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL, NULL))) |
| 3459 | /* Then go ahead and try to look up this single section in the cache */ |
| 3460 | if (simple_overlay_update_1 (osect)) |
| 3461 | /* Found it! We're done. */ |
| 3462 | return; |
| 3463 | |
| 3464 | /* Cached table no good: need to read the entire table anew. |
| 3465 | Or else we want all the sections, in which case it's actually |
| 3466 | more efficient to read the whole table in one block anyway. */ |
| 3467 | |
| 3468 | if (! simple_read_overlay_table ()) |
| 3469 | return; |
| 3470 | |
| 3471 | /* Now may as well update all sections, even if only one was requested. */ |
| 3472 | ALL_OBJSECTIONS (objfile, osect) |
| 3473 | if (section_is_overlay (osect->the_bfd_section)) |
| 3474 | { |
| 3475 | int i, size; |
| 3476 | bfd *obfd = osect->objfile->obfd; |
| 3477 | asection *bsect = osect->the_bfd_section; |
| 3478 | |
| 3479 | size = bfd_get_section_size (bsect); |
| 3480 | for (i = 0; i < cache_novlys; i++) |
| 3481 | if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) |
| 3482 | && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) |
| 3483 | /* && cache_ovly_table[i][SIZE] == size */ ) |
| 3484 | { /* obj_section matches i'th entry in ovly_table */ |
| 3485 | osect->ovly_mapped = cache_ovly_table[i][MAPPED]; |
| 3486 | break; /* finished with inner for loop: break out */ |
| 3487 | } |
| 3488 | } |
| 3489 | } |
| 3490 | |
| 3491 | /* Set the output sections and output offsets for section SECTP in |
| 3492 | ABFD. The relocation code in BFD will read these offsets, so we |
| 3493 | need to be sure they're initialized. We map each section to itself, |
| 3494 | with no offset; this means that SECTP->vma will be honored. */ |
| 3495 | |
| 3496 | static void |
| 3497 | symfile_dummy_outputs (bfd *abfd, asection *sectp, void *dummy) |
| 3498 | { |
| 3499 | sectp->output_section = sectp; |
| 3500 | sectp->output_offset = 0; |
| 3501 | } |
| 3502 | |
| 3503 | /* Relocate the contents of a debug section SECTP in ABFD. The |
| 3504 | contents are stored in BUF if it is non-NULL, or returned in a |
| 3505 | malloc'd buffer otherwise. |
| 3506 | |
| 3507 | For some platforms and debug info formats, shared libraries contain |
| 3508 | relocations against the debug sections (particularly for DWARF-2; |
| 3509 | one affected platform is PowerPC GNU/Linux, although it depends on |
| 3510 | the version of the linker in use). Also, ELF object files naturally |
| 3511 | have unresolved relocations for their debug sections. We need to apply |
| 3512 | the relocations in order to get the locations of symbols correct. */ |
| 3513 | |
| 3514 | bfd_byte * |
| 3515 | symfile_relocate_debug_section (bfd *abfd, asection *sectp, bfd_byte *buf) |
| 3516 | { |
| 3517 | /* We're only interested in debugging sections with relocation |
| 3518 | information. */ |
| 3519 | if ((sectp->flags & SEC_RELOC) == 0) |
| 3520 | return NULL; |
| 3521 | if ((sectp->flags & SEC_DEBUGGING) == 0) |
| 3522 | return NULL; |
| 3523 | |
| 3524 | /* We will handle section offsets properly elsewhere, so relocate as if |
| 3525 | all sections begin at 0. */ |
| 3526 | bfd_map_over_sections (abfd, symfile_dummy_outputs, NULL); |
| 3527 | |
| 3528 | return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL); |
| 3529 | } |
| 3530 | |
| 3531 | void |
| 3532 | _initialize_symfile (void) |
| 3533 | { |
| 3534 | struct cmd_list_element *c; |
| 3535 | |
| 3536 | c = add_cmd ("symbol-file", class_files, symbol_file_command, |
| 3537 | "Load symbol table from executable file FILE.\n\ |
| 3538 | The `file' command can also load symbol tables, as well as setting the file\n\ |
| 3539 | to execute.", &cmdlist); |
| 3540 | set_cmd_completer (c, filename_completer); |
| 3541 | |
| 3542 | c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, |
| 3543 | "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\ |
| 3544 | Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\ |
| 3545 | ADDR is the starting address of the file's text.\n\ |
| 3546 | The optional arguments are section-name section-address pairs and\n\ |
| 3547 | should be specified if the data and bss segments are not contiguous\n\ |
| 3548 | with the text. SECT is a section name to be loaded at SECT_ADDR.", |
| 3549 | &cmdlist); |
| 3550 | set_cmd_completer (c, filename_completer); |
| 3551 | |
| 3552 | c = add_cmd ("add-shared-symbol-files", class_files, |
| 3553 | add_shared_symbol_files_command, |
| 3554 | "Load the symbols from shared objects in the dynamic linker's link map.", |
| 3555 | &cmdlist); |
| 3556 | c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1, |
| 3557 | &cmdlist); |
| 3558 | |
| 3559 | c = add_cmd ("load", class_files, load_command, |
| 3560 | "Dynamically load FILE into the running program, and record its symbols\n\ |
| 3561 | for access from GDB.", &cmdlist); |
| 3562 | set_cmd_completer (c, filename_completer); |
| 3563 | |
| 3564 | deprecated_add_show_from_set |
| 3565 | (add_set_cmd ("symbol-reloading", class_support, var_boolean, |
| 3566 | (char *) &symbol_reloading, |
| 3567 | "Set dynamic symbol table reloading multiple times in one run.", |
| 3568 | &setlist), |
| 3569 | &showlist); |
| 3570 | |
| 3571 | add_prefix_cmd ("overlay", class_support, overlay_command, |
| 3572 | "Commands for debugging overlays.", &overlaylist, |
| 3573 | "overlay ", 0, &cmdlist); |
| 3574 | |
| 3575 | add_com_alias ("ovly", "overlay", class_alias, 1); |
| 3576 | add_com_alias ("ov", "overlay", class_alias, 1); |
| 3577 | |
| 3578 | add_cmd ("map-overlay", class_support, map_overlay_command, |
| 3579 | "Assert that an overlay section is mapped.", &overlaylist); |
| 3580 | |
| 3581 | add_cmd ("unmap-overlay", class_support, unmap_overlay_command, |
| 3582 | "Assert that an overlay section is unmapped.", &overlaylist); |
| 3583 | |
| 3584 | add_cmd ("list-overlays", class_support, list_overlays_command, |
| 3585 | "List mappings of overlay sections.", &overlaylist); |
| 3586 | |
| 3587 | add_cmd ("manual", class_support, overlay_manual_command, |
| 3588 | "Enable overlay debugging.", &overlaylist); |
| 3589 | add_cmd ("off", class_support, overlay_off_command, |
| 3590 | "Disable overlay debugging.", &overlaylist); |
| 3591 | add_cmd ("auto", class_support, overlay_auto_command, |
| 3592 | "Enable automatic overlay debugging.", &overlaylist); |
| 3593 | add_cmd ("load-target", class_support, overlay_load_command, |
| 3594 | "Read the overlay mapping state from the target.", &overlaylist); |
| 3595 | |
| 3596 | /* Filename extension to source language lookup table: */ |
| 3597 | init_filename_language_table (); |
| 3598 | c = add_set_cmd ("extension-language", class_files, var_string_noescape, |
| 3599 | (char *) &ext_args, |
| 3600 | "Set mapping between filename extension and source language.\n\ |
| 3601 | Usage: set extension-language .foo bar", |
| 3602 | &setlist); |
| 3603 | set_cmd_cfunc (c, set_ext_lang_command); |
| 3604 | |
| 3605 | add_info ("extensions", info_ext_lang_command, |
| 3606 | "All filename extensions associated with a source language."); |
| 3607 | |
| 3608 | deprecated_add_show_from_set |
| 3609 | (add_set_cmd ("download-write-size", class_obscure, |
| 3610 | var_integer, (char *) &download_write_size, |
| 3611 | "Set the write size used when downloading a program.\n" |
| 3612 | "Only used when downloading a program onto a remote\n" |
| 3613 | "target. Specify zero, or a negative value, to disable\n" |
| 3614 | "blocked writes. The actual size of each transfer is also\n" |
| 3615 | "limited by the size of the target packet and the memory\n" |
| 3616 | "cache.\n", |
| 3617 | &setlist), |
| 3618 | &showlist); |
| 3619 | |
| 3620 | debug_file_directory = xstrdup (DEBUGDIR); |
| 3621 | c = (add_set_cmd |
| 3622 | ("debug-file-directory", class_support, var_string, |
| 3623 | (char *) &debug_file_directory, |
| 3624 | "Set the directory where separate debug symbols are searched for.\n" |
| 3625 | "Separate debug symbols are first searched for in the same\n" |
| 3626 | "directory as the binary, then in the `" DEBUG_SUBDIRECTORY |
| 3627 | "' subdirectory,\n" |
| 3628 | "and lastly at the path of the directory of the binary with\n" |
| 3629 | "the global debug-file directory prepended\n", |
| 3630 | &setlist)); |
| 3631 | deprecated_add_show_from_set (c, &showlist); |
| 3632 | set_cmd_completer (c, filename_completer); |
| 3633 | } |