| 1 | /* Generic symbol file reading for the GNU debugger, GDB. |
| 2 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996 |
| 3 | Free Software Foundation, Inc. |
| 4 | Contributed by Cygnus Support, using pieces from other GDB modules. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include "symtab.h" |
| 24 | #include "gdbtypes.h" |
| 25 | #include "gdbcore.h" |
| 26 | #include "frame.h" |
| 27 | #include "target.h" |
| 28 | #include "value.h" |
| 29 | #include "symfile.h" |
| 30 | #include "objfiles.h" |
| 31 | #include "gdbcmd.h" |
| 32 | #include "breakpoint.h" |
| 33 | #include "language.h" |
| 34 | #include "complaints.h" |
| 35 | #include "demangle.h" |
| 36 | #include "inferior.h" /* for write_pc */ |
| 37 | #include "gdb-stabs.h" |
| 38 | #include "obstack.h" |
| 39 | |
| 40 | #include <assert.h> |
| 41 | #include <sys/types.h> |
| 42 | #include <fcntl.h> |
| 43 | #include "gdb_string.h" |
| 44 | #include "gdb_stat.h" |
| 45 | #include <ctype.h> |
| 46 | #include <time.h> |
| 47 | #ifdef HAVE_UNISTD_H |
| 48 | #include <unistd.h> |
| 49 | #endif |
| 50 | |
| 51 | #ifndef O_BINARY |
| 52 | #define O_BINARY 0 |
| 53 | #endif |
| 54 | |
| 55 | int (*ui_load_progress_hook) PARAMS ((char *, unsigned long)); |
| 56 | |
| 57 | /* Global variables owned by this file */ |
| 58 | int readnow_symbol_files; /* Read full symbols immediately */ |
| 59 | |
| 60 | struct complaint oldsyms_complaint = { |
| 61 | "Replacing old symbols for `%s'", 0, 0 |
| 62 | }; |
| 63 | |
| 64 | struct complaint empty_symtab_complaint = { |
| 65 | "Empty symbol table found for `%s'", 0, 0 |
| 66 | }; |
| 67 | |
| 68 | /* External variables and functions referenced. */ |
| 69 | |
| 70 | extern int info_verbose; |
| 71 | |
| 72 | extern void report_transfer_performance PARAMS ((unsigned long, |
| 73 | time_t, time_t)); |
| 74 | |
| 75 | /* Functions this file defines */ |
| 76 | |
| 77 | #if 0 |
| 78 | static int simple_read_overlay_region_table PARAMS ((void)); |
| 79 | static void simple_free_overlay_region_table PARAMS ((void)); |
| 80 | #endif |
| 81 | |
| 82 | static void set_initial_language PARAMS ((void)); |
| 83 | |
| 84 | static void load_command PARAMS ((char *, int)); |
| 85 | |
| 86 | static void add_symbol_file_command PARAMS ((char *, int)); |
| 87 | |
| 88 | static void add_shared_symbol_files_command PARAMS ((char *, int)); |
| 89 | |
| 90 | static void cashier_psymtab PARAMS ((struct partial_symtab *)); |
| 91 | |
| 92 | static int compare_psymbols PARAMS ((const void *, const void *)); |
| 93 | |
| 94 | static int compare_symbols PARAMS ((const void *, const void *)); |
| 95 | |
| 96 | static bfd *symfile_bfd_open PARAMS ((char *)); |
| 97 | |
| 98 | static void find_sym_fns PARAMS ((struct objfile *)); |
| 99 | |
| 100 | static void decrement_reading_symtab PARAMS ((void *)); |
| 101 | |
| 102 | /* List of all available sym_fns. On gdb startup, each object file reader |
| 103 | calls add_symtab_fns() to register information on each format it is |
| 104 | prepared to read. */ |
| 105 | |
| 106 | static struct sym_fns *symtab_fns = NULL; |
| 107 | |
| 108 | /* Flag for whether user will be reloading symbols multiple times. |
| 109 | Defaults to ON for VxWorks, otherwise OFF. */ |
| 110 | |
| 111 | #ifdef SYMBOL_RELOADING_DEFAULT |
| 112 | int symbol_reloading = SYMBOL_RELOADING_DEFAULT; |
| 113 | #else |
| 114 | int symbol_reloading = 0; |
| 115 | #endif |
| 116 | |
| 117 | /* If true, then shared library symbols will be added automatically |
| 118 | when the inferior is created, new libraries are loaded, or when |
| 119 | attaching to the inferior. This is almost always what users |
| 120 | will want to have happen; but for very large programs, the startup |
| 121 | time will be excessive, and so if this is a problem, the user can |
| 122 | clear this flag and then add the shared library symbols as needed. |
| 123 | Note that there is a potential for confusion, since if the shared |
| 124 | library symbols are not loaded, commands like "info fun" will *not* |
| 125 | report all the functions that are actually present. */ |
| 126 | |
| 127 | int auto_solib_add = 1; |
| 128 | |
| 129 | \f |
| 130 | /* Since this function is called from within qsort, in an ANSI environment |
| 131 | it must conform to the prototype for qsort, which specifies that the |
| 132 | comparison function takes two "void *" pointers. */ |
| 133 | |
| 134 | static int |
| 135 | compare_symbols (s1p, s2p) |
| 136 | const PTR s1p; |
| 137 | const PTR s2p; |
| 138 | { |
| 139 | register struct symbol **s1, **s2; |
| 140 | |
| 141 | s1 = (struct symbol **) s1p; |
| 142 | s2 = (struct symbol **) s2p; |
| 143 | |
| 144 | return (STRCMP (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2))); |
| 145 | } |
| 146 | |
| 147 | /* |
| 148 | |
| 149 | LOCAL FUNCTION |
| 150 | |
| 151 | compare_psymbols -- compare two partial symbols by name |
| 152 | |
| 153 | DESCRIPTION |
| 154 | |
| 155 | Given pointers to pointers to two partial symbol table entries, |
| 156 | compare them by name and return -N, 0, or +N (ala strcmp). |
| 157 | Typically used by sorting routines like qsort(). |
| 158 | |
| 159 | NOTES |
| 160 | |
| 161 | Does direct compare of first two characters before punting |
| 162 | and passing to strcmp for longer compares. Note that the |
| 163 | original version had a bug whereby two null strings or two |
| 164 | identically named one character strings would return the |
| 165 | comparison of memory following the null byte. |
| 166 | |
| 167 | */ |
| 168 | |
| 169 | static int |
| 170 | compare_psymbols (s1p, s2p) |
| 171 | const PTR s1p; |
| 172 | const PTR s2p; |
| 173 | { |
| 174 | register char *st1 = SYMBOL_NAME (*(struct partial_symbol **) s1p); |
| 175 | register char *st2 = SYMBOL_NAME (*(struct partial_symbol **) s2p); |
| 176 | |
| 177 | if ((st1[0] - st2[0]) || !st1[0]) |
| 178 | { |
| 179 | return (st1[0] - st2[0]); |
| 180 | } |
| 181 | else if ((st1[1] - st2[1]) || !st1[1]) |
| 182 | { |
| 183 | return (st1[1] - st2[1]); |
| 184 | } |
| 185 | else |
| 186 | { |
| 187 | return (STRCMP (st1 + 2, st2 + 2)); |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | void |
| 192 | sort_pst_symbols (pst) |
| 193 | struct partial_symtab *pst; |
| 194 | { |
| 195 | /* Sort the global list; don't sort the static list */ |
| 196 | |
| 197 | qsort (pst -> objfile -> global_psymbols.list + pst -> globals_offset, |
| 198 | pst -> n_global_syms, sizeof (struct partial_symbol *), |
| 199 | compare_psymbols); |
| 200 | } |
| 201 | |
| 202 | /* Call sort_block_syms to sort alphabetically the symbols of one block. */ |
| 203 | |
| 204 | void |
| 205 | sort_block_syms (b) |
| 206 | register struct block *b; |
| 207 | { |
| 208 | qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b), |
| 209 | sizeof (struct symbol *), compare_symbols); |
| 210 | } |
| 211 | |
| 212 | /* Call sort_symtab_syms to sort alphabetically |
| 213 | the symbols of each block of one symtab. */ |
| 214 | |
| 215 | void |
| 216 | sort_symtab_syms (s) |
| 217 | register struct symtab *s; |
| 218 | { |
| 219 | register struct blockvector *bv; |
| 220 | int nbl; |
| 221 | int i; |
| 222 | register struct block *b; |
| 223 | |
| 224 | if (s == 0) |
| 225 | return; |
| 226 | bv = BLOCKVECTOR (s); |
| 227 | nbl = BLOCKVECTOR_NBLOCKS (bv); |
| 228 | for (i = 0; i < nbl; i++) |
| 229 | { |
| 230 | b = BLOCKVECTOR_BLOCK (bv, i); |
| 231 | if (BLOCK_SHOULD_SORT (b)) |
| 232 | sort_block_syms (b); |
| 233 | } |
| 234 | } |
| 235 | |
| 236 | /* Make a null terminated copy of the string at PTR with SIZE characters in |
| 237 | the obstack pointed to by OBSTACKP . Returns the address of the copy. |
| 238 | Note that the string at PTR does not have to be null terminated, I.E. it |
| 239 | may be part of a larger string and we are only saving a substring. */ |
| 240 | |
| 241 | char * |
| 242 | obsavestring (ptr, size, obstackp) |
| 243 | char *ptr; |
| 244 | int size; |
| 245 | struct obstack *obstackp; |
| 246 | { |
| 247 | register char *p = (char *) obstack_alloc (obstackp, size + 1); |
| 248 | /* Open-coded memcpy--saves function call time. These strings are usually |
| 249 | short. FIXME: Is this really still true with a compiler that can |
| 250 | inline memcpy? */ |
| 251 | { |
| 252 | register char *p1 = ptr; |
| 253 | register char *p2 = p; |
| 254 | char *end = ptr + size; |
| 255 | while (p1 != end) |
| 256 | *p2++ = *p1++; |
| 257 | } |
| 258 | p[size] = 0; |
| 259 | return p; |
| 260 | } |
| 261 | |
| 262 | /* Concatenate strings S1, S2 and S3; return the new string. Space is found |
| 263 | in the obstack pointed to by OBSTACKP. */ |
| 264 | |
| 265 | char * |
| 266 | obconcat (obstackp, s1, s2, s3) |
| 267 | struct obstack *obstackp; |
| 268 | const char *s1, *s2, *s3; |
| 269 | { |
| 270 | register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1; |
| 271 | register char *val = (char *) obstack_alloc (obstackp, len); |
| 272 | strcpy (val, s1); |
| 273 | strcat (val, s2); |
| 274 | strcat (val, s3); |
| 275 | return val; |
| 276 | } |
| 277 | |
| 278 | /* True if we are nested inside psymtab_to_symtab. */ |
| 279 | |
| 280 | int currently_reading_symtab = 0; |
| 281 | |
| 282 | static void |
| 283 | decrement_reading_symtab (dummy) |
| 284 | void *dummy; |
| 285 | { |
| 286 | currently_reading_symtab--; |
| 287 | } |
| 288 | |
| 289 | /* Get the symbol table that corresponds to a partial_symtab. |
| 290 | This is fast after the first time you do it. In fact, there |
| 291 | is an even faster macro PSYMTAB_TO_SYMTAB that does the fast |
| 292 | case inline. */ |
| 293 | |
| 294 | struct symtab * |
| 295 | psymtab_to_symtab (pst) |
| 296 | register struct partial_symtab *pst; |
| 297 | { |
| 298 | /* If it's been looked up before, return it. */ |
| 299 | if (pst->symtab) |
| 300 | return pst->symtab; |
| 301 | |
| 302 | /* If it has not yet been read in, read it. */ |
| 303 | if (!pst->readin) |
| 304 | { |
| 305 | struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL); |
| 306 | currently_reading_symtab++; |
| 307 | (*pst->read_symtab) (pst); |
| 308 | do_cleanups (back_to); |
| 309 | } |
| 310 | |
| 311 | return pst->symtab; |
| 312 | } |
| 313 | |
| 314 | /* Initialize entry point information for this objfile. */ |
| 315 | |
| 316 | void |
| 317 | init_entry_point_info (objfile) |
| 318 | struct objfile *objfile; |
| 319 | { |
| 320 | /* Save startup file's range of PC addresses to help blockframe.c |
| 321 | decide where the bottom of the stack is. */ |
| 322 | |
| 323 | if (bfd_get_file_flags (objfile -> obfd) & EXEC_P) |
| 324 | { |
| 325 | /* Executable file -- record its entry point so we'll recognize |
| 326 | the startup file because it contains the entry point. */ |
| 327 | objfile -> ei.entry_point = bfd_get_start_address (objfile -> obfd); |
| 328 | } |
| 329 | else |
| 330 | { |
| 331 | /* Examination of non-executable.o files. Short-circuit this stuff. */ |
| 332 | objfile -> ei.entry_point = INVALID_ENTRY_POINT; |
| 333 | } |
| 334 | objfile -> ei.entry_file_lowpc = INVALID_ENTRY_LOWPC; |
| 335 | objfile -> ei.entry_file_highpc = INVALID_ENTRY_HIGHPC; |
| 336 | objfile -> ei.entry_func_lowpc = INVALID_ENTRY_LOWPC; |
| 337 | objfile -> ei.entry_func_highpc = INVALID_ENTRY_HIGHPC; |
| 338 | objfile -> ei.main_func_lowpc = INVALID_ENTRY_LOWPC; |
| 339 | objfile -> ei.main_func_highpc = INVALID_ENTRY_HIGHPC; |
| 340 | } |
| 341 | |
| 342 | /* Get current entry point address. */ |
| 343 | |
| 344 | CORE_ADDR |
| 345 | entry_point_address() |
| 346 | { |
| 347 | return symfile_objfile ? symfile_objfile->ei.entry_point : 0; |
| 348 | } |
| 349 | |
| 350 | /* Remember the lowest-addressed loadable section we've seen. |
| 351 | This function is called via bfd_map_over_sections. |
| 352 | |
| 353 | In case of equal vmas, the section with the largest size becomes the |
| 354 | lowest-addressed loadable section. |
| 355 | |
| 356 | If the vmas and sizes are equal, the last section is considered the |
| 357 | lowest-addressed loadable section. */ |
| 358 | |
| 359 | void |
| 360 | find_lowest_section (abfd, sect, obj) |
| 361 | bfd *abfd; |
| 362 | asection *sect; |
| 363 | PTR obj; |
| 364 | { |
| 365 | asection **lowest = (asection **)obj; |
| 366 | |
| 367 | if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD)) |
| 368 | return; |
| 369 | if (!*lowest) |
| 370 | *lowest = sect; /* First loadable section */ |
| 371 | else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect)) |
| 372 | *lowest = sect; /* A lower loadable section */ |
| 373 | else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect) |
| 374 | && (bfd_section_size (abfd, (*lowest)) |
| 375 | <= bfd_section_size (abfd, sect))) |
| 376 | *lowest = sect; |
| 377 | } |
| 378 | |
| 379 | /* Parse the user's idea of an offset for dynamic linking, into our idea |
| 380 | of how to represent it for fast symbol reading. This is the default |
| 381 | version of the sym_fns.sym_offsets function for symbol readers that |
| 382 | don't need to do anything special. It allocates a section_offsets table |
| 383 | for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */ |
| 384 | |
| 385 | struct section_offsets * |
| 386 | default_symfile_offsets (objfile, addr) |
| 387 | struct objfile *objfile; |
| 388 | CORE_ADDR addr; |
| 389 | { |
| 390 | struct section_offsets *section_offsets; |
| 391 | int i; |
| 392 | |
| 393 | objfile->num_sections = SECT_OFF_MAX; |
| 394 | section_offsets = (struct section_offsets *) |
| 395 | obstack_alloc (&objfile -> psymbol_obstack, SIZEOF_SECTION_OFFSETS); |
| 396 | |
| 397 | for (i = 0; i < SECT_OFF_MAX; i++) |
| 398 | ANOFFSET (section_offsets, i) = addr; |
| 399 | |
| 400 | return section_offsets; |
| 401 | } |
| 402 | |
| 403 | |
| 404 | /* Process a symbol file, as either the main file or as a dynamically |
| 405 | loaded file. |
| 406 | |
| 407 | NAME is the file name (which will be tilde-expanded and made |
| 408 | absolute herein) (but we don't free or modify NAME itself). |
| 409 | FROM_TTY says how verbose to be. MAINLINE specifies whether this |
| 410 | is the main symbol file, or whether it's an extra symbol file such |
| 411 | as dynamically loaded code. If !mainline, ADDR is the address |
| 412 | where the text segment was loaded. If VERBO, the caller has printed |
| 413 | a verbose message about the symbol reading (and complaints can be |
| 414 | more terse about it). */ |
| 415 | |
| 416 | void |
| 417 | syms_from_objfile (objfile, addr, mainline, verbo) |
| 418 | struct objfile *objfile; |
| 419 | CORE_ADDR addr; |
| 420 | int mainline; |
| 421 | int verbo; |
| 422 | { |
| 423 | struct section_offsets *section_offsets; |
| 424 | asection *lowest_sect; |
| 425 | struct cleanup *old_chain; |
| 426 | |
| 427 | init_entry_point_info (objfile); |
| 428 | find_sym_fns (objfile); |
| 429 | |
| 430 | /* Make sure that partially constructed symbol tables will be cleaned up |
| 431 | if an error occurs during symbol reading. */ |
| 432 | old_chain = make_cleanup (free_objfile, objfile); |
| 433 | |
| 434 | if (mainline) |
| 435 | { |
| 436 | /* We will modify the main symbol table, make sure that all its users |
| 437 | will be cleaned up if an error occurs during symbol reading. */ |
| 438 | make_cleanup (clear_symtab_users, 0); |
| 439 | |
| 440 | /* Since no error yet, throw away the old symbol table. */ |
| 441 | |
| 442 | if (symfile_objfile != NULL) |
| 443 | { |
| 444 | free_objfile (symfile_objfile); |
| 445 | symfile_objfile = NULL; |
| 446 | } |
| 447 | |
| 448 | /* Currently we keep symbols from the add-symbol-file command. |
| 449 | If the user wants to get rid of them, they should do "symbol-file" |
| 450 | without arguments first. Not sure this is the best behavior |
| 451 | (PR 2207). */ |
| 452 | |
| 453 | (*objfile -> sf -> sym_new_init) (objfile); |
| 454 | } |
| 455 | |
| 456 | /* Convert addr into an offset rather than an absolute address. |
| 457 | We find the lowest address of a loaded segment in the objfile, |
| 458 | and assume that <addr> is where that got loaded. Due to historical |
| 459 | precedent, we warn if that doesn't happen to be a text segment. */ |
| 460 | |
| 461 | if (mainline) |
| 462 | { |
| 463 | addr = 0; /* No offset from objfile addresses. */ |
| 464 | } |
| 465 | else |
| 466 | { |
| 467 | lowest_sect = bfd_get_section_by_name (objfile->obfd, ".text"); |
| 468 | if (lowest_sect == NULL) |
| 469 | bfd_map_over_sections (objfile->obfd, find_lowest_section, |
| 470 | (PTR) &lowest_sect); |
| 471 | |
| 472 | if (lowest_sect == NULL) |
| 473 | warning ("no loadable sections found in added symbol-file %s", |
| 474 | objfile->name); |
| 475 | else if ((bfd_get_section_flags (objfile->obfd, lowest_sect) & SEC_CODE) |
| 476 | == 0) |
| 477 | /* FIXME-32x64--assumes bfd_vma fits in long. */ |
| 478 | warning ("Lowest section in %s is %s at 0x%lx", |
| 479 | objfile->name, |
| 480 | bfd_section_name (objfile->obfd, lowest_sect), |
| 481 | (unsigned long) bfd_section_vma (objfile->obfd, lowest_sect)); |
| 482 | |
| 483 | if (lowest_sect) |
| 484 | addr -= bfd_section_vma (objfile->obfd, lowest_sect); |
| 485 | } |
| 486 | |
| 487 | /* Initialize symbol reading routines for this objfile, allow complaints to |
| 488 | appear for this new file, and record how verbose to be, then do the |
| 489 | initial symbol reading for this file. */ |
| 490 | |
| 491 | (*objfile -> sf -> sym_init) (objfile); |
| 492 | clear_complaints (1, verbo); |
| 493 | |
| 494 | section_offsets = (*objfile -> sf -> sym_offsets) (objfile, addr); |
| 495 | objfile->section_offsets = section_offsets; |
| 496 | |
| 497 | #ifndef IBM6000_TARGET |
| 498 | /* This is a SVR4/SunOS specific hack, I think. In any event, it |
| 499 | screws RS/6000. sym_offsets should be doing this sort of thing, |
| 500 | because it knows the mapping between bfd sections and |
| 501 | section_offsets. */ |
| 502 | /* This is a hack. As far as I can tell, section offsets are not |
| 503 | target dependent. They are all set to addr with a couple of |
| 504 | exceptions. The exceptions are sysvr4 shared libraries, whose |
| 505 | offsets are kept in solib structures anyway and rs6000 xcoff |
| 506 | which handles shared libraries in a completely unique way. |
| 507 | |
| 508 | Section offsets are built similarly, except that they are built |
| 509 | by adding addr in all cases because there is no clear mapping |
| 510 | from section_offsets into actual sections. Note that solib.c |
| 511 | has a different algorythm for finding section offsets. |
| 512 | |
| 513 | These should probably all be collapsed into some target |
| 514 | independent form of shared library support. FIXME. */ |
| 515 | |
| 516 | if (addr) |
| 517 | { |
| 518 | struct obj_section *s; |
| 519 | |
| 520 | for (s = objfile->sections; s < objfile->sections_end; ++s) |
| 521 | { |
| 522 | s->addr -= s->offset; |
| 523 | s->addr += addr; |
| 524 | s->endaddr -= s->offset; |
| 525 | s->endaddr += addr; |
| 526 | s->offset += addr; |
| 527 | } |
| 528 | } |
| 529 | #endif /* not IBM6000_TARGET */ |
| 530 | |
| 531 | (*objfile -> sf -> sym_read) (objfile, section_offsets, mainline); |
| 532 | |
| 533 | if (!have_partial_symbols () && !have_full_symbols ()) |
| 534 | { |
| 535 | wrap_here (""); |
| 536 | printf_filtered ("(no debugging symbols found)..."); |
| 537 | wrap_here (""); |
| 538 | } |
| 539 | |
| 540 | /* Don't allow char * to have a typename (else would get caddr_t). |
| 541 | Ditto void *. FIXME: Check whether this is now done by all the |
| 542 | symbol readers themselves (many of them now do), and if so remove |
| 543 | it from here. */ |
| 544 | |
| 545 | TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0; |
| 546 | TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0; |
| 547 | |
| 548 | /* Mark the objfile has having had initial symbol read attempted. Note |
| 549 | that this does not mean we found any symbols... */ |
| 550 | |
| 551 | objfile -> flags |= OBJF_SYMS; |
| 552 | |
| 553 | /* Discard cleanups as symbol reading was successful. */ |
| 554 | |
| 555 | discard_cleanups (old_chain); |
| 556 | |
| 557 | /* Call this after reading in a new symbol table to give target dependant code |
| 558 | a crack at the new symbols. For instance, this could be used to update the |
| 559 | values of target-specific symbols GDB needs to keep track of (such as |
| 560 | _sigtramp, or whatever). */ |
| 561 | |
| 562 | TARGET_SYMFILE_POSTREAD (objfile); |
| 563 | } |
| 564 | |
| 565 | /* Perform required actions after either reading in the initial |
| 566 | symbols for a new objfile, or mapping in the symbols from a reusable |
| 567 | objfile. */ |
| 568 | |
| 569 | void |
| 570 | new_symfile_objfile (objfile, mainline, verbo) |
| 571 | struct objfile *objfile; |
| 572 | int mainline; |
| 573 | int verbo; |
| 574 | { |
| 575 | |
| 576 | /* If this is the main symbol file we have to clean up all users of the |
| 577 | old main symbol file. Otherwise it is sufficient to fixup all the |
| 578 | breakpoints that may have been redefined by this symbol file. */ |
| 579 | if (mainline) |
| 580 | { |
| 581 | /* OK, make it the "real" symbol file. */ |
| 582 | symfile_objfile = objfile; |
| 583 | |
| 584 | clear_symtab_users (); |
| 585 | } |
| 586 | else |
| 587 | { |
| 588 | breakpoint_re_set (); |
| 589 | } |
| 590 | |
| 591 | /* We're done reading the symbol file; finish off complaints. */ |
| 592 | clear_complaints (0, verbo); |
| 593 | } |
| 594 | |
| 595 | /* Process a symbol file, as either the main file or as a dynamically |
| 596 | loaded file. |
| 597 | |
| 598 | NAME is the file name (which will be tilde-expanded and made |
| 599 | absolute herein) (but we don't free or modify NAME itself). |
| 600 | FROM_TTY says how verbose to be. MAINLINE specifies whether this |
| 601 | is the main symbol file, or whether it's an extra symbol file such |
| 602 | as dynamically loaded code. If !mainline, ADDR is the address |
| 603 | where the text segment was loaded. |
| 604 | |
| 605 | Upon success, returns a pointer to the objfile that was added. |
| 606 | Upon failure, jumps back to command level (never returns). */ |
| 607 | |
| 608 | struct objfile * |
| 609 | symbol_file_add (name, from_tty, addr, mainline, mapped, readnow) |
| 610 | char *name; |
| 611 | int from_tty; |
| 612 | CORE_ADDR addr; |
| 613 | int mainline; |
| 614 | int mapped; |
| 615 | int readnow; |
| 616 | { |
| 617 | struct objfile *objfile; |
| 618 | struct partial_symtab *psymtab; |
| 619 | bfd *abfd; |
| 620 | |
| 621 | /* Open a bfd for the file, and give user a chance to burp if we'd be |
| 622 | interactively wiping out any existing symbols. */ |
| 623 | |
| 624 | abfd = symfile_bfd_open (name); |
| 625 | |
| 626 | if ((have_full_symbols () || have_partial_symbols ()) |
| 627 | && mainline |
| 628 | && from_tty |
| 629 | && !query ("Load new symbol table from \"%s\"? ", name)) |
| 630 | error ("Not confirmed."); |
| 631 | |
| 632 | objfile = allocate_objfile (abfd, mapped); |
| 633 | |
| 634 | /* If the objfile uses a mapped symbol file, and we have a psymtab for |
| 635 | it, then skip reading any symbols at this time. */ |
| 636 | |
| 637 | if ((objfile -> flags & OBJF_MAPPED) && (objfile -> flags & OBJF_SYMS)) |
| 638 | { |
| 639 | /* We mapped in an existing symbol table file that already has had |
| 640 | initial symbol reading performed, so we can skip that part. Notify |
| 641 | the user that instead of reading the symbols, they have been mapped. |
| 642 | */ |
| 643 | if (from_tty || info_verbose) |
| 644 | { |
| 645 | printf_filtered ("Mapped symbols for %s...", name); |
| 646 | wrap_here (""); |
| 647 | gdb_flush (gdb_stdout); |
| 648 | } |
| 649 | init_entry_point_info (objfile); |
| 650 | find_sym_fns (objfile); |
| 651 | } |
| 652 | else |
| 653 | { |
| 654 | /* We either created a new mapped symbol table, mapped an existing |
| 655 | symbol table file which has not had initial symbol reading |
| 656 | performed, or need to read an unmapped symbol table. */ |
| 657 | if (from_tty || info_verbose) |
| 658 | { |
| 659 | printf_filtered ("Reading symbols from %s...", name); |
| 660 | wrap_here (""); |
| 661 | gdb_flush (gdb_stdout); |
| 662 | } |
| 663 | syms_from_objfile (objfile, addr, mainline, from_tty); |
| 664 | } |
| 665 | |
| 666 | /* We now have at least a partial symbol table. Check to see if the |
| 667 | user requested that all symbols be read on initial access via either |
| 668 | the gdb startup command line or on a per symbol file basis. Expand |
| 669 | all partial symbol tables for this objfile if so. */ |
| 670 | |
| 671 | if (readnow || readnow_symbol_files) |
| 672 | { |
| 673 | if (from_tty || info_verbose) |
| 674 | { |
| 675 | printf_filtered ("expanding to full symbols..."); |
| 676 | wrap_here (""); |
| 677 | gdb_flush (gdb_stdout); |
| 678 | } |
| 679 | |
| 680 | for (psymtab = objfile -> psymtabs; |
| 681 | psymtab != NULL; |
| 682 | psymtab = psymtab -> next) |
| 683 | { |
| 684 | psymtab_to_symtab (psymtab); |
| 685 | } |
| 686 | } |
| 687 | |
| 688 | if (from_tty || info_verbose) |
| 689 | { |
| 690 | printf_filtered ("done.\n"); |
| 691 | gdb_flush (gdb_stdout); |
| 692 | } |
| 693 | |
| 694 | new_symfile_objfile (objfile, mainline, from_tty); |
| 695 | |
| 696 | target_new_objfile (objfile); |
| 697 | |
| 698 | return (objfile); |
| 699 | } |
| 700 | |
| 701 | /* This is the symbol-file command. Read the file, analyze its |
| 702 | symbols, and add a struct symtab to a symtab list. The syntax of |
| 703 | the command is rather bizarre--(1) buildargv implements various |
| 704 | quoting conventions which are undocumented and have little or |
| 705 | nothing in common with the way things are quoted (or not quoted) |
| 706 | elsewhere in GDB, (2) options are used, which are not generally |
| 707 | used in GDB (perhaps "set mapped on", "set readnow on" would be |
| 708 | better), (3) the order of options matters, which is contrary to GNU |
| 709 | conventions (because it is confusing and inconvenient). */ |
| 710 | |
| 711 | void |
| 712 | symbol_file_command (args, from_tty) |
| 713 | char *args; |
| 714 | int from_tty; |
| 715 | { |
| 716 | char **argv; |
| 717 | char *name = NULL; |
| 718 | CORE_ADDR text_relocation = 0; /* text_relocation */ |
| 719 | struct cleanup *cleanups; |
| 720 | int mapped = 0; |
| 721 | int readnow = 0; |
| 722 | |
| 723 | dont_repeat (); |
| 724 | |
| 725 | if (args == NULL) |
| 726 | { |
| 727 | if ((have_full_symbols () || have_partial_symbols ()) |
| 728 | && from_tty |
| 729 | && !query ("Discard symbol table from `%s'? ", |
| 730 | symfile_objfile -> name)) |
| 731 | error ("Not confirmed."); |
| 732 | free_all_objfiles (); |
| 733 | symfile_objfile = NULL; |
| 734 | if (from_tty) |
| 735 | { |
| 736 | printf_unfiltered ("No symbol file now.\n"); |
| 737 | } |
| 738 | } |
| 739 | else |
| 740 | { |
| 741 | if ((argv = buildargv (args)) == NULL) |
| 742 | { |
| 743 | nomem (0); |
| 744 | } |
| 745 | cleanups = make_cleanup (freeargv, (char *) argv); |
| 746 | while (*argv != NULL) |
| 747 | { |
| 748 | if (STREQ (*argv, "-mapped")) |
| 749 | { |
| 750 | mapped = 1; |
| 751 | } |
| 752 | else if (STREQ (*argv, "-readnow")) |
| 753 | { |
| 754 | readnow = 1; |
| 755 | } |
| 756 | else if (**argv == '-') |
| 757 | { |
| 758 | error ("unknown option `%s'", *argv); |
| 759 | } |
| 760 | else |
| 761 | { |
| 762 | char *p; |
| 763 | |
| 764 | name = *argv; |
| 765 | |
| 766 | /* this is for rombug remote only, to get the text relocation by |
| 767 | using link command */ |
| 768 | p = strrchr(name, '/'); |
| 769 | if (p != NULL) p++; |
| 770 | else p = name; |
| 771 | |
| 772 | target_link(p, &text_relocation); |
| 773 | |
| 774 | if (text_relocation == (CORE_ADDR)0) |
| 775 | return; |
| 776 | else if (text_relocation == (CORE_ADDR)-1) |
| 777 | symbol_file_add (name, from_tty, (CORE_ADDR)0, 1, mapped, |
| 778 | readnow); |
| 779 | else |
| 780 | symbol_file_add (name, from_tty, (CORE_ADDR)text_relocation, |
| 781 | 0, mapped, readnow); |
| 782 | |
| 783 | /* Getting new symbols may change our opinion about what is |
| 784 | frameless. */ |
| 785 | reinit_frame_cache (); |
| 786 | |
| 787 | set_initial_language (); |
| 788 | } |
| 789 | argv++; |
| 790 | } |
| 791 | |
| 792 | if (name == NULL) |
| 793 | { |
| 794 | error ("no symbol file name was specified"); |
| 795 | } |
| 796 | do_cleanups (cleanups); |
| 797 | } |
| 798 | } |
| 799 | |
| 800 | /* Set the initial language. |
| 801 | |
| 802 | A better solution would be to record the language in the psymtab when reading |
| 803 | partial symbols, and then use it (if known) to set the language. This would |
| 804 | be a win for formats that encode the language in an easily discoverable place, |
| 805 | such as DWARF. For stabs, we can jump through hoops looking for specially |
| 806 | named symbols or try to intuit the language from the specific type of stabs |
| 807 | we find, but we can't do that until later when we read in full symbols. |
| 808 | FIXME. */ |
| 809 | |
| 810 | static void |
| 811 | set_initial_language () |
| 812 | { |
| 813 | struct partial_symtab *pst; |
| 814 | enum language lang = language_unknown; |
| 815 | |
| 816 | pst = find_main_psymtab (); |
| 817 | if (pst != NULL) |
| 818 | { |
| 819 | if (pst -> filename != NULL) |
| 820 | { |
| 821 | lang = deduce_language_from_filename (pst -> filename); |
| 822 | } |
| 823 | if (lang == language_unknown) |
| 824 | { |
| 825 | /* Make C the default language */ |
| 826 | lang = language_c; |
| 827 | } |
| 828 | set_language (lang); |
| 829 | expected_language = current_language; /* Don't warn the user */ |
| 830 | } |
| 831 | } |
| 832 | |
| 833 | /* Open file specified by NAME and hand it off to BFD for preliminary |
| 834 | analysis. Result is a newly initialized bfd *, which includes a newly |
| 835 | malloc'd` copy of NAME (tilde-expanded and made absolute). |
| 836 | In case of trouble, error() is called. */ |
| 837 | |
| 838 | static bfd * |
| 839 | symfile_bfd_open (name) |
| 840 | char *name; |
| 841 | { |
| 842 | bfd *sym_bfd; |
| 843 | int desc; |
| 844 | char *absolute_name; |
| 845 | |
| 846 | name = tilde_expand (name); /* Returns 1st new malloc'd copy */ |
| 847 | |
| 848 | /* Look down path for it, allocate 2nd new malloc'd copy. */ |
| 849 | desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name); |
| 850 | #if defined(__GO32__) || defined(_WIN32) |
| 851 | if (desc < 0) |
| 852 | { |
| 853 | char *exename = alloca (strlen (name) + 5); |
| 854 | strcat (strcpy (exename, name), ".exe"); |
| 855 | desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY, |
| 856 | 0, &absolute_name); |
| 857 | } |
| 858 | #endif |
| 859 | if (desc < 0) |
| 860 | { |
| 861 | make_cleanup (free, name); |
| 862 | perror_with_name (name); |
| 863 | } |
| 864 | free (name); /* Free 1st new malloc'd copy */ |
| 865 | name = absolute_name; /* Keep 2nd malloc'd copy in bfd */ |
| 866 | /* It'll be freed in free_objfile(). */ |
| 867 | |
| 868 | sym_bfd = bfd_fdopenr (name, gnutarget, desc); |
| 869 | if (!sym_bfd) |
| 870 | { |
| 871 | close (desc); |
| 872 | make_cleanup (free, name); |
| 873 | error ("\"%s\": can't open to read symbols: %s.", name, |
| 874 | bfd_errmsg (bfd_get_error ())); |
| 875 | } |
| 876 | sym_bfd->cacheable = true; |
| 877 | |
| 878 | if (!bfd_check_format (sym_bfd, bfd_object)) |
| 879 | { |
| 880 | /* FIXME: should be checking for errors from bfd_close (for one thing, |
| 881 | on error it does not free all the storage associated with the |
| 882 | bfd). */ |
| 883 | bfd_close (sym_bfd); /* This also closes desc */ |
| 884 | make_cleanup (free, name); |
| 885 | error ("\"%s\": can't read symbols: %s.", name, |
| 886 | bfd_errmsg (bfd_get_error ())); |
| 887 | } |
| 888 | |
| 889 | return (sym_bfd); |
| 890 | } |
| 891 | |
| 892 | /* Link a new symtab_fns into the global symtab_fns list. Called on gdb |
| 893 | startup by the _initialize routine in each object file format reader, |
| 894 | to register information about each format the the reader is prepared |
| 895 | to handle. */ |
| 896 | |
| 897 | void |
| 898 | add_symtab_fns (sf) |
| 899 | struct sym_fns *sf; |
| 900 | { |
| 901 | sf->next = symtab_fns; |
| 902 | symtab_fns = sf; |
| 903 | } |
| 904 | |
| 905 | |
| 906 | /* Initialize to read symbols from the symbol file sym_bfd. It either |
| 907 | returns or calls error(). The result is an initialized struct sym_fns |
| 908 | in the objfile structure, that contains cached information about the |
| 909 | symbol file. */ |
| 910 | |
| 911 | static void |
| 912 | find_sym_fns (objfile) |
| 913 | struct objfile *objfile; |
| 914 | { |
| 915 | struct sym_fns *sf; |
| 916 | enum bfd_flavour our_flavour = bfd_get_flavour (objfile -> obfd); |
| 917 | char *our_target = bfd_get_target (objfile -> obfd); |
| 918 | |
| 919 | /* Special kludge for RS/6000 and PowerMac. See xcoffread.c. */ |
| 920 | if (STREQ (our_target, "aixcoff-rs6000") || |
| 921 | STREQ (our_target, "xcoff-powermac")) |
| 922 | our_flavour = (enum bfd_flavour)-1; |
| 923 | |
| 924 | /* Special kludge for apollo. See dstread.c. */ |
| 925 | if (STREQN (our_target, "apollo", 6)) |
| 926 | our_flavour = (enum bfd_flavour)-2; |
| 927 | |
| 928 | for (sf = symtab_fns; sf != NULL; sf = sf -> next) |
| 929 | { |
| 930 | if (our_flavour == sf -> sym_flavour) |
| 931 | { |
| 932 | objfile -> sf = sf; |
| 933 | return; |
| 934 | } |
| 935 | } |
| 936 | error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.", |
| 937 | bfd_get_target (objfile -> obfd)); |
| 938 | } |
| 939 | \f |
| 940 | /* This function runs the load command of our current target. */ |
| 941 | |
| 942 | static void |
| 943 | load_command (arg, from_tty) |
| 944 | char *arg; |
| 945 | int from_tty; |
| 946 | { |
| 947 | if (arg == NULL) |
| 948 | arg = get_exec_file (1); |
| 949 | target_load (arg, from_tty); |
| 950 | } |
| 951 | |
| 952 | /* This version of "load" should be usable for any target. Currently |
| 953 | it is just used for remote targets, not inftarg.c or core files, |
| 954 | on the theory that only in that case is it useful. |
| 955 | |
| 956 | Avoiding xmodem and the like seems like a win (a) because we don't have |
| 957 | to worry about finding it, and (b) On VMS, fork() is very slow and so |
| 958 | we don't want to run a subprocess. On the other hand, I'm not sure how |
| 959 | performance compares. */ |
| 960 | void |
| 961 | generic_load (filename, from_tty) |
| 962 | char *filename; |
| 963 | int from_tty; |
| 964 | { |
| 965 | struct cleanup *old_cleanups; |
| 966 | asection *s; |
| 967 | bfd *loadfile_bfd; |
| 968 | time_t start_time, end_time; /* Start and end times of download */ |
| 969 | unsigned long data_count = 0; /* Number of bytes transferred to memory */ |
| 970 | int n; |
| 971 | unsigned long load_offset = 0; /* offset to add to vma for each section */ |
| 972 | char buf[128]; |
| 973 | |
| 974 | /* enable user to specify address for downloading as 2nd arg to load */ |
| 975 | n = sscanf(filename, "%s 0x%lx", buf, &load_offset); |
| 976 | if (n > 1 ) |
| 977 | filename = buf; |
| 978 | else |
| 979 | load_offset = 0; |
| 980 | |
| 981 | loadfile_bfd = bfd_openr (filename, gnutarget); |
| 982 | if (loadfile_bfd == NULL) |
| 983 | { |
| 984 | perror_with_name (filename); |
| 985 | return; |
| 986 | } |
| 987 | /* FIXME: should be checking for errors from bfd_close (for one thing, |
| 988 | on error it does not free all the storage associated with the |
| 989 | bfd). */ |
| 990 | old_cleanups = make_cleanup (bfd_close, loadfile_bfd); |
| 991 | |
| 992 | if (!bfd_check_format (loadfile_bfd, bfd_object)) |
| 993 | { |
| 994 | error ("\"%s\" is not an object file: %s", filename, |
| 995 | bfd_errmsg (bfd_get_error ())); |
| 996 | } |
| 997 | |
| 998 | start_time = time (NULL); |
| 999 | |
| 1000 | for (s = loadfile_bfd->sections; s; s = s->next) |
| 1001 | { |
| 1002 | if (s->flags & SEC_LOAD) |
| 1003 | { |
| 1004 | bfd_size_type size; |
| 1005 | |
| 1006 | size = bfd_get_section_size_before_reloc (s); |
| 1007 | if (size > 0) |
| 1008 | { |
| 1009 | char *buffer; |
| 1010 | struct cleanup *old_chain; |
| 1011 | bfd_vma lma; |
| 1012 | unsigned long l = size / 100; |
| 1013 | int err; |
| 1014 | char *sect; |
| 1015 | unsigned long sent; |
| 1016 | unsigned long len; |
| 1017 | |
| 1018 | l = l > 100 ? l : 100; |
| 1019 | data_count += size; |
| 1020 | |
| 1021 | buffer = xmalloc (size); |
| 1022 | old_chain = make_cleanup (free, buffer); |
| 1023 | |
| 1024 | lma = s->lma; |
| 1025 | lma += load_offset; |
| 1026 | |
| 1027 | /* Is this really necessary? I guess it gives the user something |
| 1028 | to look at during a long download. */ |
| 1029 | printf_filtered ("Loading section %s, size 0x%lx lma ", |
| 1030 | bfd_get_section_name (loadfile_bfd, s), |
| 1031 | (unsigned long) size); |
| 1032 | print_address_numeric (lma, 1, gdb_stdout); |
| 1033 | printf_filtered ("\n"); |
| 1034 | |
| 1035 | bfd_get_section_contents (loadfile_bfd, s, buffer, 0, size); |
| 1036 | |
| 1037 | sect = bfd_get_section_name (loadfile_bfd, s); |
| 1038 | sent = 0; |
| 1039 | do |
| 1040 | { |
| 1041 | len = (size - sent) < l ? (size - sent) : l; |
| 1042 | sent += len; |
| 1043 | err = target_write_memory (lma, buffer, len); |
| 1044 | if (ui_load_progress_hook) |
| 1045 | if (ui_load_progress_hook (sect, sent)) |
| 1046 | error ("Canceled the download"); |
| 1047 | lma += len; |
| 1048 | buffer += len; |
| 1049 | } |
| 1050 | while (err == 0 && sent < size); |
| 1051 | |
| 1052 | if (err != 0) |
| 1053 | error ("Memory access error while loading section %s.", |
| 1054 | bfd_get_section_name (loadfile_bfd, s)); |
| 1055 | |
| 1056 | do_cleanups (old_chain); |
| 1057 | } |
| 1058 | } |
| 1059 | } |
| 1060 | |
| 1061 | end_time = time (NULL); |
| 1062 | |
| 1063 | printf_filtered ("Start address 0x%lx\n", loadfile_bfd->start_address); |
| 1064 | |
| 1065 | /* We were doing this in remote-mips.c, I suspect it is right |
| 1066 | for other targets too. */ |
| 1067 | write_pc (loadfile_bfd->start_address); |
| 1068 | |
| 1069 | /* FIXME: are we supposed to call symbol_file_add or not? According to |
| 1070 | a comment from remote-mips.c (where a call to symbol_file_add was |
| 1071 | commented out), making the call confuses GDB if more than one file is |
| 1072 | loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c |
| 1073 | does. */ |
| 1074 | |
| 1075 | report_transfer_performance (data_count, start_time, end_time); |
| 1076 | |
| 1077 | do_cleanups (old_cleanups); |
| 1078 | } |
| 1079 | |
| 1080 | /* Report how fast the transfer went. */ |
| 1081 | |
| 1082 | void |
| 1083 | report_transfer_performance (data_count, start_time, end_time) |
| 1084 | unsigned long data_count; |
| 1085 | time_t start_time, end_time; |
| 1086 | { |
| 1087 | printf_filtered ("Transfer rate: "); |
| 1088 | if (end_time != start_time) |
| 1089 | printf_filtered ("%d bits/sec", |
| 1090 | (data_count * 8) / (end_time - start_time)); |
| 1091 | else |
| 1092 | printf_filtered ("%d bits in <1 sec", (data_count * 8)); |
| 1093 | printf_filtered (".\n"); |
| 1094 | } |
| 1095 | |
| 1096 | /* This function allows the addition of incrementally linked object files. |
| 1097 | It does not modify any state in the target, only in the debugger. */ |
| 1098 | |
| 1099 | /* ARGSUSED */ |
| 1100 | static void |
| 1101 | add_symbol_file_command (args, from_tty) |
| 1102 | char *args; |
| 1103 | int from_tty; |
| 1104 | { |
| 1105 | char *name = NULL; |
| 1106 | CORE_ADDR text_addr; |
| 1107 | char *arg; |
| 1108 | int readnow = 0; |
| 1109 | int mapped = 0; |
| 1110 | |
| 1111 | dont_repeat (); |
| 1112 | |
| 1113 | if (args == NULL) |
| 1114 | { |
| 1115 | error ("add-symbol-file takes a file name and an address"); |
| 1116 | } |
| 1117 | |
| 1118 | /* Make a copy of the string that we can safely write into. */ |
| 1119 | |
| 1120 | args = strdup (args); |
| 1121 | make_cleanup (free, args); |
| 1122 | |
| 1123 | /* Pick off any -option args and the file name. */ |
| 1124 | |
| 1125 | while ((*args != '\000') && (name == NULL)) |
| 1126 | { |
| 1127 | while (isspace (*args)) {args++;} |
| 1128 | arg = args; |
| 1129 | while ((*args != '\000') && !isspace (*args)) {args++;} |
| 1130 | if (*args != '\000') |
| 1131 | { |
| 1132 | *args++ = '\000'; |
| 1133 | } |
| 1134 | if (*arg != '-') |
| 1135 | { |
| 1136 | name = arg; |
| 1137 | } |
| 1138 | else if (STREQ (arg, "-mapped")) |
| 1139 | { |
| 1140 | mapped = 1; |
| 1141 | } |
| 1142 | else if (STREQ (arg, "-readnow")) |
| 1143 | { |
| 1144 | readnow = 1; |
| 1145 | } |
| 1146 | else |
| 1147 | { |
| 1148 | error ("unknown option `%s'", arg); |
| 1149 | } |
| 1150 | } |
| 1151 | |
| 1152 | /* After picking off any options and the file name, args should be |
| 1153 | left pointing at the remainder of the command line, which should |
| 1154 | be the address expression to evaluate. */ |
| 1155 | |
| 1156 | if (name == NULL) |
| 1157 | { |
| 1158 | error ("add-symbol-file takes a file name"); |
| 1159 | } |
| 1160 | name = tilde_expand (name); |
| 1161 | make_cleanup (free, name); |
| 1162 | |
| 1163 | if (*args != '\000') |
| 1164 | { |
| 1165 | text_addr = parse_and_eval_address (args); |
| 1166 | } |
| 1167 | else |
| 1168 | { |
| 1169 | target_link(name, &text_addr); |
| 1170 | if (text_addr == (CORE_ADDR)-1) |
| 1171 | error("Don't know how to get text start location for this file"); |
| 1172 | } |
| 1173 | |
| 1174 | /* FIXME-32x64: Assumes text_addr fits in a long. */ |
| 1175 | if (!query ("add symbol table from file \"%s\" at text_addr = %s?\n", |
| 1176 | name, local_hex_string ((unsigned long)text_addr))) |
| 1177 | error ("Not confirmed."); |
| 1178 | |
| 1179 | symbol_file_add (name, 0, text_addr, 0, mapped, readnow); |
| 1180 | |
| 1181 | /* Getting new symbols may change our opinion about what is |
| 1182 | frameless. */ |
| 1183 | reinit_frame_cache (); |
| 1184 | } |
| 1185 | \f |
| 1186 | static void |
| 1187 | add_shared_symbol_files_command (args, from_tty) |
| 1188 | char *args; |
| 1189 | int from_tty; |
| 1190 | { |
| 1191 | #ifdef ADD_SHARED_SYMBOL_FILES |
| 1192 | ADD_SHARED_SYMBOL_FILES (args, from_tty); |
| 1193 | #else |
| 1194 | error ("This command is not available in this configuration of GDB."); |
| 1195 | #endif |
| 1196 | } |
| 1197 | \f |
| 1198 | /* Re-read symbols if a symbol-file has changed. */ |
| 1199 | void |
| 1200 | reread_symbols () |
| 1201 | { |
| 1202 | struct objfile *objfile; |
| 1203 | long new_modtime; |
| 1204 | int reread_one = 0; |
| 1205 | struct stat new_statbuf; |
| 1206 | int res; |
| 1207 | |
| 1208 | /* With the addition of shared libraries, this should be modified, |
| 1209 | the load time should be saved in the partial symbol tables, since |
| 1210 | different tables may come from different source files. FIXME. |
| 1211 | This routine should then walk down each partial symbol table |
| 1212 | and see if the symbol table that it originates from has been changed */ |
| 1213 | |
| 1214 | for (objfile = object_files; objfile; objfile = objfile->next) { |
| 1215 | if (objfile->obfd) { |
| 1216 | #ifdef IBM6000_TARGET |
| 1217 | /* If this object is from a shared library, then you should |
| 1218 | stat on the library name, not member name. */ |
| 1219 | |
| 1220 | if (objfile->obfd->my_archive) |
| 1221 | res = stat (objfile->obfd->my_archive->filename, &new_statbuf); |
| 1222 | else |
| 1223 | #endif |
| 1224 | res = stat (objfile->name, &new_statbuf); |
| 1225 | if (res != 0) { |
| 1226 | /* FIXME, should use print_sys_errmsg but it's not filtered. */ |
| 1227 | printf_filtered ("`%s' has disappeared; keeping its symbols.\n", |
| 1228 | objfile->name); |
| 1229 | continue; |
| 1230 | } |
| 1231 | new_modtime = new_statbuf.st_mtime; |
| 1232 | if (new_modtime != objfile->mtime) |
| 1233 | { |
| 1234 | struct cleanup *old_cleanups; |
| 1235 | struct section_offsets *offsets; |
| 1236 | int num_offsets; |
| 1237 | int section_offsets_size; |
| 1238 | char *obfd_filename; |
| 1239 | |
| 1240 | printf_filtered ("`%s' has changed; re-reading symbols.\n", |
| 1241 | objfile->name); |
| 1242 | |
| 1243 | /* There are various functions like symbol_file_add, |
| 1244 | symfile_bfd_open, syms_from_objfile, etc., which might |
| 1245 | appear to do what we want. But they have various other |
| 1246 | effects which we *don't* want. So we just do stuff |
| 1247 | ourselves. We don't worry about mapped files (for one thing, |
| 1248 | any mapped file will be out of date). */ |
| 1249 | |
| 1250 | /* If we get an error, blow away this objfile (not sure if |
| 1251 | that is the correct response for things like shared |
| 1252 | libraries). */ |
| 1253 | old_cleanups = make_cleanup (free_objfile, objfile); |
| 1254 | /* We need to do this whenever any symbols go away. */ |
| 1255 | make_cleanup (clear_symtab_users, 0); |
| 1256 | |
| 1257 | /* Clean up any state BFD has sitting around. We don't need |
| 1258 | to close the descriptor but BFD lacks a way of closing the |
| 1259 | BFD without closing the descriptor. */ |
| 1260 | obfd_filename = bfd_get_filename (objfile->obfd); |
| 1261 | if (!bfd_close (objfile->obfd)) |
| 1262 | error ("Can't close BFD for %s: %s", objfile->name, |
| 1263 | bfd_errmsg (bfd_get_error ())); |
| 1264 | objfile->obfd = bfd_openr (obfd_filename, gnutarget); |
| 1265 | if (objfile->obfd == NULL) |
| 1266 | error ("Can't open %s to read symbols.", objfile->name); |
| 1267 | /* bfd_openr sets cacheable to true, which is what we want. */ |
| 1268 | if (!bfd_check_format (objfile->obfd, bfd_object)) |
| 1269 | error ("Can't read symbols from %s: %s.", objfile->name, |
| 1270 | bfd_errmsg (bfd_get_error ())); |
| 1271 | |
| 1272 | /* Save the offsets, we will nuke them with the rest of the |
| 1273 | psymbol_obstack. */ |
| 1274 | num_offsets = objfile->num_sections; |
| 1275 | section_offsets_size = |
| 1276 | sizeof (struct section_offsets) |
| 1277 | + sizeof (objfile->section_offsets->offsets) * num_offsets; |
| 1278 | offsets = (struct section_offsets *) alloca (section_offsets_size); |
| 1279 | memcpy (offsets, objfile->section_offsets, section_offsets_size); |
| 1280 | |
| 1281 | /* Nuke all the state that we will re-read. Much of the following |
| 1282 | code which sets things to NULL really is necessary to tell |
| 1283 | other parts of GDB that there is nothing currently there. */ |
| 1284 | |
| 1285 | /* FIXME: Do we have to free a whole linked list, or is this |
| 1286 | enough? */ |
| 1287 | if (objfile->global_psymbols.list) |
| 1288 | mfree (objfile->md, objfile->global_psymbols.list); |
| 1289 | memset (&objfile -> global_psymbols, 0, |
| 1290 | sizeof (objfile -> global_psymbols)); |
| 1291 | if (objfile->static_psymbols.list) |
| 1292 | mfree (objfile->md, objfile->static_psymbols.list); |
| 1293 | memset (&objfile -> static_psymbols, 0, |
| 1294 | sizeof (objfile -> static_psymbols)); |
| 1295 | |
| 1296 | /* Free the obstacks for non-reusable objfiles */ |
| 1297 | obstack_free (&objfile -> psymbol_cache.cache, 0); |
| 1298 | memset (&objfile -> psymbol_cache, 0, |
| 1299 | sizeof (objfile -> psymbol_cache)); |
| 1300 | obstack_free (&objfile -> psymbol_obstack, 0); |
| 1301 | obstack_free (&objfile -> symbol_obstack, 0); |
| 1302 | obstack_free (&objfile -> type_obstack, 0); |
| 1303 | objfile->sections = NULL; |
| 1304 | objfile->symtabs = NULL; |
| 1305 | objfile->psymtabs = NULL; |
| 1306 | objfile->free_psymtabs = NULL; |
| 1307 | objfile->msymbols = NULL; |
| 1308 | objfile->minimal_symbol_count= 0; |
| 1309 | objfile->fundamental_types = NULL; |
| 1310 | if (objfile -> sf != NULL) |
| 1311 | { |
| 1312 | (*objfile -> sf -> sym_finish) (objfile); |
| 1313 | } |
| 1314 | |
| 1315 | /* We never make this a mapped file. */ |
| 1316 | objfile -> md = NULL; |
| 1317 | /* obstack_specify_allocation also initializes the obstack so |
| 1318 | it is empty. */ |
| 1319 | obstack_specify_allocation (&objfile -> psymbol_cache.cache, 0, 0, |
| 1320 | xmalloc, free); |
| 1321 | obstack_specify_allocation (&objfile -> psymbol_obstack, 0, 0, |
| 1322 | xmalloc, free); |
| 1323 | obstack_specify_allocation (&objfile -> symbol_obstack, 0, 0, |
| 1324 | xmalloc, free); |
| 1325 | obstack_specify_allocation (&objfile -> type_obstack, 0, 0, |
| 1326 | xmalloc, free); |
| 1327 | if (build_objfile_section_table (objfile)) |
| 1328 | { |
| 1329 | error ("Can't find the file sections in `%s': %s", |
| 1330 | objfile -> name, bfd_errmsg (bfd_get_error ())); |
| 1331 | } |
| 1332 | |
| 1333 | /* We use the same section offsets as from last time. I'm not |
| 1334 | sure whether that is always correct for shared libraries. */ |
| 1335 | objfile->section_offsets = (struct section_offsets *) |
| 1336 | obstack_alloc (&objfile -> psymbol_obstack, section_offsets_size); |
| 1337 | memcpy (objfile->section_offsets, offsets, section_offsets_size); |
| 1338 | objfile->num_sections = num_offsets; |
| 1339 | |
| 1340 | /* What the hell is sym_new_init for, anyway? The concept of |
| 1341 | distinguishing between the main file and additional files |
| 1342 | in this way seems rather dubious. */ |
| 1343 | if (objfile == symfile_objfile) |
| 1344 | (*objfile->sf->sym_new_init) (objfile); |
| 1345 | |
| 1346 | (*objfile->sf->sym_init) (objfile); |
| 1347 | clear_complaints (1, 1); |
| 1348 | /* The "mainline" parameter is a hideous hack; I think leaving it |
| 1349 | zero is OK since dbxread.c also does what it needs to do if |
| 1350 | objfile->global_psymbols.size is 0. */ |
| 1351 | (*objfile->sf->sym_read) (objfile, objfile->section_offsets, 0); |
| 1352 | if (!have_partial_symbols () && !have_full_symbols ()) |
| 1353 | { |
| 1354 | wrap_here (""); |
| 1355 | printf_filtered ("(no debugging symbols found)\n"); |
| 1356 | wrap_here (""); |
| 1357 | } |
| 1358 | objfile -> flags |= OBJF_SYMS; |
| 1359 | |
| 1360 | /* We're done reading the symbol file; finish off complaints. */ |
| 1361 | clear_complaints (0, 1); |
| 1362 | |
| 1363 | /* Getting new symbols may change our opinion about what is |
| 1364 | frameless. */ |
| 1365 | |
| 1366 | reinit_frame_cache (); |
| 1367 | |
| 1368 | /* Discard cleanups as symbol reading was successful. */ |
| 1369 | discard_cleanups (old_cleanups); |
| 1370 | |
| 1371 | /* If the mtime has changed between the time we set new_modtime |
| 1372 | and now, we *want* this to be out of date, so don't call stat |
| 1373 | again now. */ |
| 1374 | objfile->mtime = new_modtime; |
| 1375 | reread_one = 1; |
| 1376 | |
| 1377 | /* Call this after reading in a new symbol table to give target |
| 1378 | dependant code a crack at the new symbols. For instance, this |
| 1379 | could be used to update the values of target-specific symbols GDB |
| 1380 | needs to keep track of (such as _sigtramp, or whatever). */ |
| 1381 | |
| 1382 | TARGET_SYMFILE_POSTREAD (objfile); |
| 1383 | } |
| 1384 | } |
| 1385 | } |
| 1386 | |
| 1387 | if (reread_one) |
| 1388 | clear_symtab_users (); |
| 1389 | } |
| 1390 | |
| 1391 | \f |
| 1392 | enum language |
| 1393 | deduce_language_from_filename (filename) |
| 1394 | char *filename; |
| 1395 | { |
| 1396 | char *c; |
| 1397 | |
| 1398 | if (0 == filename) |
| 1399 | ; /* Get default */ |
| 1400 | else if (0 == (c = strrchr (filename, '.'))) |
| 1401 | ; /* Get default. */ |
| 1402 | else if (STREQ (c, ".c")) |
| 1403 | return language_c; |
| 1404 | else if (STREQ (c, ".cc") || STREQ (c, ".C") || STREQ (c, ".cxx") |
| 1405 | || STREQ (c, ".cpp") || STREQ (c, ".cp") || STREQ (c, ".c++")) |
| 1406 | return language_cplus; |
| 1407 | else if (STREQ (c, ".java")) |
| 1408 | return language_java; |
| 1409 | else if (STREQ (c, ".ch") || STREQ (c, ".c186") || STREQ (c, ".c286")) |
| 1410 | return language_chill; |
| 1411 | else if (STREQ (c, ".f") || STREQ (c, ".F")) |
| 1412 | return language_fortran; |
| 1413 | else if (STREQ (c, ".mod")) |
| 1414 | return language_m2; |
| 1415 | else if (STREQ (c, ".s") || STREQ (c, ".S")) |
| 1416 | return language_asm; |
| 1417 | |
| 1418 | return language_unknown; /* default */ |
| 1419 | } |
| 1420 | \f |
| 1421 | /* allocate_symtab: |
| 1422 | |
| 1423 | Allocate and partly initialize a new symbol table. Return a pointer |
| 1424 | to it. error() if no space. |
| 1425 | |
| 1426 | Caller must set these fields: |
| 1427 | LINETABLE(symtab) |
| 1428 | symtab->blockvector |
| 1429 | symtab->dirname |
| 1430 | symtab->free_code |
| 1431 | symtab->free_ptr |
| 1432 | initialize any EXTRA_SYMTAB_INFO |
| 1433 | possibly free_named_symtabs (symtab->filename); |
| 1434 | */ |
| 1435 | |
| 1436 | struct symtab * |
| 1437 | allocate_symtab (filename, objfile) |
| 1438 | char *filename; |
| 1439 | struct objfile *objfile; |
| 1440 | { |
| 1441 | register struct symtab *symtab; |
| 1442 | |
| 1443 | symtab = (struct symtab *) |
| 1444 | obstack_alloc (&objfile -> symbol_obstack, sizeof (struct symtab)); |
| 1445 | memset (symtab, 0, sizeof (*symtab)); |
| 1446 | symtab -> filename = obsavestring (filename, strlen (filename), |
| 1447 | &objfile -> symbol_obstack); |
| 1448 | symtab -> fullname = NULL; |
| 1449 | symtab -> language = deduce_language_from_filename (filename); |
| 1450 | symtab -> debugformat = obsavestring ("unknown", 7, |
| 1451 | &objfile -> symbol_obstack); |
| 1452 | |
| 1453 | /* Hook it to the objfile it comes from */ |
| 1454 | |
| 1455 | symtab -> objfile = objfile; |
| 1456 | symtab -> next = objfile -> symtabs; |
| 1457 | objfile -> symtabs = symtab; |
| 1458 | |
| 1459 | #ifdef INIT_EXTRA_SYMTAB_INFO |
| 1460 | INIT_EXTRA_SYMTAB_INFO (symtab); |
| 1461 | #endif |
| 1462 | |
| 1463 | return (symtab); |
| 1464 | } |
| 1465 | |
| 1466 | struct partial_symtab * |
| 1467 | allocate_psymtab (filename, objfile) |
| 1468 | char *filename; |
| 1469 | struct objfile *objfile; |
| 1470 | { |
| 1471 | struct partial_symtab *psymtab; |
| 1472 | |
| 1473 | if (objfile -> free_psymtabs) |
| 1474 | { |
| 1475 | psymtab = objfile -> free_psymtabs; |
| 1476 | objfile -> free_psymtabs = psymtab -> next; |
| 1477 | } |
| 1478 | else |
| 1479 | psymtab = (struct partial_symtab *) |
| 1480 | obstack_alloc (&objfile -> psymbol_obstack, |
| 1481 | sizeof (struct partial_symtab)); |
| 1482 | |
| 1483 | memset (psymtab, 0, sizeof (struct partial_symtab)); |
| 1484 | psymtab -> filename = obsavestring (filename, strlen (filename), |
| 1485 | &objfile -> psymbol_obstack); |
| 1486 | psymtab -> symtab = NULL; |
| 1487 | |
| 1488 | /* Prepend it to the psymtab list for the objfile it belongs to. |
| 1489 | Psymtabs are searched in most recent inserted -> least recent |
| 1490 | inserted order. */ |
| 1491 | |
| 1492 | psymtab -> objfile = objfile; |
| 1493 | psymtab -> next = objfile -> psymtabs; |
| 1494 | objfile -> psymtabs = psymtab; |
| 1495 | #if 0 |
| 1496 | { |
| 1497 | struct partial_symtab **prev_pst; |
| 1498 | psymtab -> objfile = objfile; |
| 1499 | psymtab -> next = NULL; |
| 1500 | prev_pst = &(objfile -> psymtabs); |
| 1501 | while ((*prev_pst) != NULL) |
| 1502 | prev_pst = &((*prev_pst) -> next); |
| 1503 | (*prev_pst) = psymtab; |
| 1504 | } |
| 1505 | #endif |
| 1506 | |
| 1507 | return (psymtab); |
| 1508 | } |
| 1509 | |
| 1510 | void |
| 1511 | discard_psymtab (pst) |
| 1512 | struct partial_symtab *pst; |
| 1513 | { |
| 1514 | struct partial_symtab **prev_pst; |
| 1515 | |
| 1516 | /* From dbxread.c: |
| 1517 | Empty psymtabs happen as a result of header files which don't |
| 1518 | have any symbols in them. There can be a lot of them. But this |
| 1519 | check is wrong, in that a psymtab with N_SLINE entries but |
| 1520 | nothing else is not empty, but we don't realize that. Fixing |
| 1521 | that without slowing things down might be tricky. */ |
| 1522 | |
| 1523 | /* First, snip it out of the psymtab chain */ |
| 1524 | |
| 1525 | prev_pst = &(pst->objfile->psymtabs); |
| 1526 | while ((*prev_pst) != pst) |
| 1527 | prev_pst = &((*prev_pst)->next); |
| 1528 | (*prev_pst) = pst->next; |
| 1529 | |
| 1530 | /* Next, put it on a free list for recycling */ |
| 1531 | |
| 1532 | pst->next = pst->objfile->free_psymtabs; |
| 1533 | pst->objfile->free_psymtabs = pst; |
| 1534 | } |
| 1535 | |
| 1536 | \f |
| 1537 | /* Reset all data structures in gdb which may contain references to symbol |
| 1538 | table data. */ |
| 1539 | |
| 1540 | void |
| 1541 | clear_symtab_users () |
| 1542 | { |
| 1543 | /* Someday, we should do better than this, by only blowing away |
| 1544 | the things that really need to be blown. */ |
| 1545 | clear_value_history (); |
| 1546 | clear_displays (); |
| 1547 | clear_internalvars (); |
| 1548 | breakpoint_re_set (); |
| 1549 | set_default_breakpoint (0, 0, 0, 0); |
| 1550 | current_source_symtab = 0; |
| 1551 | current_source_line = 0; |
| 1552 | clear_pc_function_cache (); |
| 1553 | target_new_objfile (NULL); |
| 1554 | } |
| 1555 | |
| 1556 | /* clear_symtab_users_once: |
| 1557 | |
| 1558 | This function is run after symbol reading, or from a cleanup. |
| 1559 | If an old symbol table was obsoleted, the old symbol table |
| 1560 | has been blown away, but the other GDB data structures that may |
| 1561 | reference it have not yet been cleared or re-directed. (The old |
| 1562 | symtab was zapped, and the cleanup queued, in free_named_symtab() |
| 1563 | below.) |
| 1564 | |
| 1565 | This function can be queued N times as a cleanup, or called |
| 1566 | directly; it will do all the work the first time, and then will be a |
| 1567 | no-op until the next time it is queued. This works by bumping a |
| 1568 | counter at queueing time. Much later when the cleanup is run, or at |
| 1569 | the end of symbol processing (in case the cleanup is discarded), if |
| 1570 | the queued count is greater than the "done-count", we do the work |
| 1571 | and set the done-count to the queued count. If the queued count is |
| 1572 | less than or equal to the done-count, we just ignore the call. This |
| 1573 | is needed because reading a single .o file will often replace many |
| 1574 | symtabs (one per .h file, for example), and we don't want to reset |
| 1575 | the breakpoints N times in the user's face. |
| 1576 | |
| 1577 | The reason we both queue a cleanup, and call it directly after symbol |
| 1578 | reading, is because the cleanup protects us in case of errors, but is |
| 1579 | discarded if symbol reading is successful. */ |
| 1580 | |
| 1581 | #if 0 |
| 1582 | /* FIXME: As free_named_symtabs is currently a big noop this function |
| 1583 | is no longer needed. */ |
| 1584 | static void |
| 1585 | clear_symtab_users_once PARAMS ((void)); |
| 1586 | |
| 1587 | static int clear_symtab_users_queued; |
| 1588 | static int clear_symtab_users_done; |
| 1589 | |
| 1590 | static void |
| 1591 | clear_symtab_users_once () |
| 1592 | { |
| 1593 | /* Enforce once-per-`do_cleanups'-semantics */ |
| 1594 | if (clear_symtab_users_queued <= clear_symtab_users_done) |
| 1595 | return; |
| 1596 | clear_symtab_users_done = clear_symtab_users_queued; |
| 1597 | |
| 1598 | clear_symtab_users (); |
| 1599 | } |
| 1600 | #endif |
| 1601 | |
| 1602 | /* Delete the specified psymtab, and any others that reference it. */ |
| 1603 | |
| 1604 | static void |
| 1605 | cashier_psymtab (pst) |
| 1606 | struct partial_symtab *pst; |
| 1607 | { |
| 1608 | struct partial_symtab *ps, *pprev = NULL; |
| 1609 | int i; |
| 1610 | |
| 1611 | /* Find its previous psymtab in the chain */ |
| 1612 | for (ps = pst->objfile->psymtabs; ps; ps = ps->next) { |
| 1613 | if (ps == pst) |
| 1614 | break; |
| 1615 | pprev = ps; |
| 1616 | } |
| 1617 | |
| 1618 | if (ps) { |
| 1619 | /* Unhook it from the chain. */ |
| 1620 | if (ps == pst->objfile->psymtabs) |
| 1621 | pst->objfile->psymtabs = ps->next; |
| 1622 | else |
| 1623 | pprev->next = ps->next; |
| 1624 | |
| 1625 | /* FIXME, we can't conveniently deallocate the entries in the |
| 1626 | partial_symbol lists (global_psymbols/static_psymbols) that |
| 1627 | this psymtab points to. These just take up space until all |
| 1628 | the psymtabs are reclaimed. Ditto the dependencies list and |
| 1629 | filename, which are all in the psymbol_obstack. */ |
| 1630 | |
| 1631 | /* We need to cashier any psymtab that has this one as a dependency... */ |
| 1632 | again: |
| 1633 | for (ps = pst->objfile->psymtabs; ps; ps = ps->next) { |
| 1634 | for (i = 0; i < ps->number_of_dependencies; i++) { |
| 1635 | if (ps->dependencies[i] == pst) { |
| 1636 | cashier_psymtab (ps); |
| 1637 | goto again; /* Must restart, chain has been munged. */ |
| 1638 | } |
| 1639 | } |
| 1640 | } |
| 1641 | } |
| 1642 | } |
| 1643 | |
| 1644 | /* If a symtab or psymtab for filename NAME is found, free it along |
| 1645 | with any dependent breakpoints, displays, etc. |
| 1646 | Used when loading new versions of object modules with the "add-file" |
| 1647 | command. This is only called on the top-level symtab or psymtab's name; |
| 1648 | it is not called for subsidiary files such as .h files. |
| 1649 | |
| 1650 | Return value is 1 if we blew away the environment, 0 if not. |
| 1651 | FIXME. The return valu appears to never be used. |
| 1652 | |
| 1653 | FIXME. I think this is not the best way to do this. We should |
| 1654 | work on being gentler to the environment while still cleaning up |
| 1655 | all stray pointers into the freed symtab. */ |
| 1656 | |
| 1657 | int |
| 1658 | free_named_symtabs (name) |
| 1659 | char *name; |
| 1660 | { |
| 1661 | #if 0 |
| 1662 | /* FIXME: With the new method of each objfile having it's own |
| 1663 | psymtab list, this function needs serious rethinking. In particular, |
| 1664 | why was it ever necessary to toss psymtabs with specific compilation |
| 1665 | unit filenames, as opposed to all psymtabs from a particular symbol |
| 1666 | file? -- fnf |
| 1667 | Well, the answer is that some systems permit reloading of particular |
| 1668 | compilation units. We want to blow away any old info about these |
| 1669 | compilation units, regardless of which objfiles they arrived in. --gnu. */ |
| 1670 | |
| 1671 | register struct symtab *s; |
| 1672 | register struct symtab *prev; |
| 1673 | register struct partial_symtab *ps; |
| 1674 | struct blockvector *bv; |
| 1675 | int blewit = 0; |
| 1676 | |
| 1677 | /* We only wack things if the symbol-reload switch is set. */ |
| 1678 | if (!symbol_reloading) |
| 1679 | return 0; |
| 1680 | |
| 1681 | /* Some symbol formats have trouble providing file names... */ |
| 1682 | if (name == 0 || *name == '\0') |
| 1683 | return 0; |
| 1684 | |
| 1685 | /* Look for a psymtab with the specified name. */ |
| 1686 | |
| 1687 | again2: |
| 1688 | for (ps = partial_symtab_list; ps; ps = ps->next) { |
| 1689 | if (STREQ (name, ps->filename)) { |
| 1690 | cashier_psymtab (ps); /* Blow it away...and its little dog, too. */ |
| 1691 | goto again2; /* Must restart, chain has been munged */ |
| 1692 | } |
| 1693 | } |
| 1694 | |
| 1695 | /* Look for a symtab with the specified name. */ |
| 1696 | |
| 1697 | for (s = symtab_list; s; s = s->next) |
| 1698 | { |
| 1699 | if (STREQ (name, s->filename)) |
| 1700 | break; |
| 1701 | prev = s; |
| 1702 | } |
| 1703 | |
| 1704 | if (s) |
| 1705 | { |
| 1706 | if (s == symtab_list) |
| 1707 | symtab_list = s->next; |
| 1708 | else |
| 1709 | prev->next = s->next; |
| 1710 | |
| 1711 | /* For now, queue a delete for all breakpoints, displays, etc., whether |
| 1712 | or not they depend on the symtab being freed. This should be |
| 1713 | changed so that only those data structures affected are deleted. */ |
| 1714 | |
| 1715 | /* But don't delete anything if the symtab is empty. |
| 1716 | This test is necessary due to a bug in "dbxread.c" that |
| 1717 | causes empty symtabs to be created for N_SO symbols that |
| 1718 | contain the pathname of the object file. (This problem |
| 1719 | has been fixed in GDB 3.9x). */ |
| 1720 | |
| 1721 | bv = BLOCKVECTOR (s); |
| 1722 | if (BLOCKVECTOR_NBLOCKS (bv) > 2 |
| 1723 | || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) |
| 1724 | || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK))) |
| 1725 | { |
| 1726 | complain (&oldsyms_complaint, name); |
| 1727 | |
| 1728 | clear_symtab_users_queued++; |
| 1729 | make_cleanup (clear_symtab_users_once, 0); |
| 1730 | blewit = 1; |
| 1731 | } else { |
| 1732 | complain (&empty_symtab_complaint, name); |
| 1733 | } |
| 1734 | |
| 1735 | free_symtab (s); |
| 1736 | } |
| 1737 | else |
| 1738 | { |
| 1739 | /* It is still possible that some breakpoints will be affected |
| 1740 | even though no symtab was found, since the file might have |
| 1741 | been compiled without debugging, and hence not be associated |
| 1742 | with a symtab. In order to handle this correctly, we would need |
| 1743 | to keep a list of text address ranges for undebuggable files. |
| 1744 | For now, we do nothing, since this is a fairly obscure case. */ |
| 1745 | ; |
| 1746 | } |
| 1747 | |
| 1748 | /* FIXME, what about the minimal symbol table? */ |
| 1749 | return blewit; |
| 1750 | #else |
| 1751 | return (0); |
| 1752 | #endif |
| 1753 | } |
| 1754 | \f |
| 1755 | /* Allocate and partially fill a partial symtab. It will be |
| 1756 | completely filled at the end of the symbol list. |
| 1757 | |
| 1758 | SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR |
| 1759 | is the address relative to which its symbols are (incremental) or 0 |
| 1760 | (normal). */ |
| 1761 | |
| 1762 | |
| 1763 | struct partial_symtab * |
| 1764 | start_psymtab_common (objfile, section_offsets, |
| 1765 | filename, textlow, global_syms, static_syms) |
| 1766 | struct objfile *objfile; |
| 1767 | struct section_offsets *section_offsets; |
| 1768 | char *filename; |
| 1769 | CORE_ADDR textlow; |
| 1770 | struct partial_symbol **global_syms; |
| 1771 | struct partial_symbol **static_syms; |
| 1772 | { |
| 1773 | struct partial_symtab *psymtab; |
| 1774 | |
| 1775 | psymtab = allocate_psymtab (filename, objfile); |
| 1776 | psymtab -> section_offsets = section_offsets; |
| 1777 | psymtab -> textlow = textlow; |
| 1778 | psymtab -> texthigh = psymtab -> textlow; /* default */ |
| 1779 | psymtab -> globals_offset = global_syms - objfile -> global_psymbols.list; |
| 1780 | psymtab -> statics_offset = static_syms - objfile -> static_psymbols.list; |
| 1781 | return (psymtab); |
| 1782 | } |
| 1783 | \f |
| 1784 | /* Add a symbol with a long value to a psymtab. |
| 1785 | Since one arg is a struct, we pass in a ptr and deref it (sigh). */ |
| 1786 | |
| 1787 | void |
| 1788 | add_psymbol_to_list (name, namelength, namespace, class, list, val, coreaddr, |
| 1789 | language, objfile) |
| 1790 | char *name; |
| 1791 | int namelength; |
| 1792 | namespace_enum namespace; |
| 1793 | enum address_class class; |
| 1794 | struct psymbol_allocation_list *list; |
| 1795 | long val; /* Value as a long */ |
| 1796 | CORE_ADDR coreaddr; /* Value as a CORE_ADDR */ |
| 1797 | enum language language; |
| 1798 | struct objfile *objfile; |
| 1799 | { |
| 1800 | register struct partial_symbol *psym; |
| 1801 | char *buf = alloca (namelength + 1); |
| 1802 | /* psymbol is static so that there will be no uninitialized gaps in the |
| 1803 | structure which might contain random data, causing cache misses in |
| 1804 | bcache. */ |
| 1805 | static struct partial_symbol psymbol; |
| 1806 | |
| 1807 | /* Create local copy of the partial symbol */ |
| 1808 | memcpy (buf, name, namelength); |
| 1809 | buf[namelength] = '\0'; |
| 1810 | SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache); |
| 1811 | /* val and coreaddr are mutually exclusive, one of them *will* be zero */ |
| 1812 | if (val != 0) |
| 1813 | { |
| 1814 | SYMBOL_VALUE (&psymbol) = val; |
| 1815 | } |
| 1816 | else |
| 1817 | { |
| 1818 | SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr; |
| 1819 | } |
| 1820 | SYMBOL_SECTION (&psymbol) = 0; |
| 1821 | SYMBOL_LANGUAGE (&psymbol) = language; |
| 1822 | PSYMBOL_NAMESPACE (&psymbol) = namespace; |
| 1823 | PSYMBOL_CLASS (&psymbol) = class; |
| 1824 | SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language); |
| 1825 | |
| 1826 | /* Stash the partial symbol away in the cache */ |
| 1827 | psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache); |
| 1828 | |
| 1829 | /* Save pointer to partial symbol in psymtab, growing symtab if needed. */ |
| 1830 | if (list->next >= list->list + list->size) |
| 1831 | { |
| 1832 | extend_psymbol_list (list, objfile); |
| 1833 | } |
| 1834 | *list->next++ = psym; |
| 1835 | OBJSTAT (objfile, n_psyms++); |
| 1836 | } |
| 1837 | |
| 1838 | /* Initialize storage for partial symbols. */ |
| 1839 | |
| 1840 | void |
| 1841 | init_psymbol_list (objfile, total_symbols) |
| 1842 | struct objfile *objfile; |
| 1843 | int total_symbols; |
| 1844 | { |
| 1845 | /* Free any previously allocated psymbol lists. */ |
| 1846 | |
| 1847 | if (objfile -> global_psymbols.list) |
| 1848 | { |
| 1849 | mfree (objfile -> md, (PTR)objfile -> global_psymbols.list); |
| 1850 | } |
| 1851 | if (objfile -> static_psymbols.list) |
| 1852 | { |
| 1853 | mfree (objfile -> md, (PTR)objfile -> static_psymbols.list); |
| 1854 | } |
| 1855 | |
| 1856 | /* Current best guess is that approximately a twentieth |
| 1857 | of the total symbols (in a debugging file) are global or static |
| 1858 | oriented symbols */ |
| 1859 | |
| 1860 | objfile -> global_psymbols.size = total_symbols / 10; |
| 1861 | objfile -> static_psymbols.size = total_symbols / 10; |
| 1862 | |
| 1863 | if (objfile -> global_psymbols.size > 0) |
| 1864 | { |
| 1865 | objfile -> global_psymbols.next = |
| 1866 | objfile -> global_psymbols.list = (struct partial_symbol **) |
| 1867 | xmmalloc (objfile -> md, (objfile -> global_psymbols.size |
| 1868 | * sizeof (struct partial_symbol *))); |
| 1869 | } |
| 1870 | if (objfile -> static_psymbols.size > 0) |
| 1871 | { |
| 1872 | objfile -> static_psymbols.next = |
| 1873 | objfile -> static_psymbols.list = (struct partial_symbol **) |
| 1874 | xmmalloc (objfile -> md, (objfile -> static_psymbols.size |
| 1875 | * sizeof (struct partial_symbol *))); |
| 1876 | } |
| 1877 | } |
| 1878 | |
| 1879 | /* OVERLAYS: |
| 1880 | The following code implements an abstraction for debugging overlay sections. |
| 1881 | |
| 1882 | The target model is as follows: |
| 1883 | 1) The gnu linker will permit multiple sections to be mapped into the |
| 1884 | same VMA, each with its own unique LMA (or load address). |
| 1885 | 2) It is assumed that some runtime mechanism exists for mapping the |
| 1886 | sections, one by one, from the load address into the VMA address. |
| 1887 | 3) This code provides a mechanism for gdb to keep track of which |
| 1888 | sections should be considered to be mapped from the VMA to the LMA. |
| 1889 | This information is used for symbol lookup, and memory read/write. |
| 1890 | For instance, if a section has been mapped then its contents |
| 1891 | should be read from the VMA, otherwise from the LMA. |
| 1892 | |
| 1893 | Two levels of debugger support for overlays are available. One is |
| 1894 | "manual", in which the debugger relies on the user to tell it which |
| 1895 | overlays are currently mapped. This level of support is |
| 1896 | implemented entirely in the core debugger, and the information about |
| 1897 | whether a section is mapped is kept in the objfile->obj_section table. |
| 1898 | |
| 1899 | The second level of support is "automatic", and is only available if |
| 1900 | the target-specific code provides functionality to read the target's |
| 1901 | overlay mapping table, and translate its contents for the debugger |
| 1902 | (by updating the mapped state information in the obj_section tables). |
| 1903 | |
| 1904 | The interface is as follows: |
| 1905 | User commands: |
| 1906 | overlay map <name> -- tell gdb to consider this section mapped |
| 1907 | overlay unmap <name> -- tell gdb to consider this section unmapped |
| 1908 | overlay list -- list the sections that GDB thinks are mapped |
| 1909 | overlay read-target -- get the target's state of what's mapped |
| 1910 | overlay off/manual/auto -- set overlay debugging state |
| 1911 | Functional interface: |
| 1912 | find_pc_mapped_section(pc): if the pc is in the range of a mapped |
| 1913 | section, return that section. |
| 1914 | find_pc_overlay(pc): find any overlay section that contains |
| 1915 | the pc, either in its VMA or its LMA |
| 1916 | overlay_is_mapped(sect): true if overlay is marked as mapped |
| 1917 | section_is_overlay(sect): true if section's VMA != LMA |
| 1918 | pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA |
| 1919 | pc_in_unmapped_range(...): true if pc belongs to section's LMA |
| 1920 | overlay_mapped_address(...): map an address from section's LMA to VMA |
| 1921 | overlay_unmapped_address(...): map an address from section's VMA to LMA |
| 1922 | symbol_overlayed_address(...): Return a "current" address for symbol: |
| 1923 | either in VMA or LMA depending on whether |
| 1924 | the symbol's section is currently mapped |
| 1925 | */ |
| 1926 | |
| 1927 | /* Overlay debugging state: */ |
| 1928 | |
| 1929 | int overlay_debugging = 0; /* 0 == off, 1 == manual, -1 == auto */ |
| 1930 | int overlay_cache_invalid = 0; /* True if need to refresh mapped state */ |
| 1931 | |
| 1932 | /* Target vector for refreshing overlay mapped state */ |
| 1933 | static void simple_overlay_update PARAMS ((struct obj_section *)); |
| 1934 | void (*target_overlay_update) PARAMS ((struct obj_section *)) |
| 1935 | = simple_overlay_update; |
| 1936 | |
| 1937 | /* Function: section_is_overlay (SECTION) |
| 1938 | Returns true if SECTION has VMA not equal to LMA, ie. |
| 1939 | SECTION is loaded at an address different from where it will "run". */ |
| 1940 | |
| 1941 | int |
| 1942 | section_is_overlay (section) |
| 1943 | asection *section; |
| 1944 | { |
| 1945 | if (overlay_debugging) |
| 1946 | if (section && section->lma != 0 && |
| 1947 | section->vma != section->lma) |
| 1948 | return 1; |
| 1949 | |
| 1950 | return 0; |
| 1951 | } |
| 1952 | |
| 1953 | /* Function: overlay_invalidate_all (void) |
| 1954 | Invalidate the mapped state of all overlay sections (mark it as stale). */ |
| 1955 | |
| 1956 | static void |
| 1957 | overlay_invalidate_all () |
| 1958 | { |
| 1959 | struct objfile *objfile; |
| 1960 | struct obj_section *sect; |
| 1961 | |
| 1962 | ALL_OBJSECTIONS (objfile, sect) |
| 1963 | if (section_is_overlay (sect->the_bfd_section)) |
| 1964 | sect->ovly_mapped = -1; |
| 1965 | } |
| 1966 | |
| 1967 | /* Function: overlay_is_mapped (SECTION) |
| 1968 | Returns true if section is an overlay, and is currently mapped. |
| 1969 | Private: public access is thru function section_is_mapped. |
| 1970 | |
| 1971 | Access to the ovly_mapped flag is restricted to this function, so |
| 1972 | that we can do automatic update. If the global flag |
| 1973 | OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call |
| 1974 | overlay_invalidate_all. If the mapped state of the particular |
| 1975 | section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */ |
| 1976 | |
| 1977 | static int |
| 1978 | overlay_is_mapped (osect) |
| 1979 | struct obj_section *osect; |
| 1980 | { |
| 1981 | if (osect == 0 || !section_is_overlay (osect->the_bfd_section)) |
| 1982 | return 0; |
| 1983 | |
| 1984 | switch (overlay_debugging) |
| 1985 | { |
| 1986 | default: |
| 1987 | case 0: return 0; /* overlay debugging off */ |
| 1988 | case -1: /* overlay debugging automatic */ |
| 1989 | /* Unles there is a target_overlay_update function, |
| 1990 | there's really nothing useful to do here (can't really go auto) */ |
| 1991 | if (target_overlay_update) |
| 1992 | { |
| 1993 | if (overlay_cache_invalid) |
| 1994 | { |
| 1995 | overlay_invalidate_all (); |
| 1996 | overlay_cache_invalid = 0; |
| 1997 | } |
| 1998 | if (osect->ovly_mapped == -1) |
| 1999 | (*target_overlay_update) (osect); |
| 2000 | } |
| 2001 | /* fall thru to manual case */ |
| 2002 | case 1: /* overlay debugging manual */ |
| 2003 | return osect->ovly_mapped == 1; |
| 2004 | } |
| 2005 | } |
| 2006 | |
| 2007 | /* Function: section_is_mapped |
| 2008 | Returns true if section is an overlay, and is currently mapped. */ |
| 2009 | |
| 2010 | int |
| 2011 | section_is_mapped (section) |
| 2012 | asection *section; |
| 2013 | { |
| 2014 | struct objfile *objfile; |
| 2015 | struct obj_section *osect; |
| 2016 | |
| 2017 | if (overlay_debugging) |
| 2018 | if (section && section_is_overlay (section)) |
| 2019 | ALL_OBJSECTIONS (objfile, osect) |
| 2020 | if (osect->the_bfd_section == section) |
| 2021 | return overlay_is_mapped (osect); |
| 2022 | |
| 2023 | return 0; |
| 2024 | } |
| 2025 | |
| 2026 | /* Function: pc_in_unmapped_range |
| 2027 | If PC falls into the lma range of SECTION, return true, else false. */ |
| 2028 | |
| 2029 | CORE_ADDR |
| 2030 | pc_in_unmapped_range (pc, section) |
| 2031 | CORE_ADDR pc; |
| 2032 | asection *section; |
| 2033 | { |
| 2034 | int size; |
| 2035 | |
| 2036 | if (overlay_debugging) |
| 2037 | if (section && section_is_overlay (section)) |
| 2038 | { |
| 2039 | size = bfd_get_section_size_before_reloc (section); |
| 2040 | if (section->lma <= pc && pc < section->lma + size) |
| 2041 | return 1; |
| 2042 | } |
| 2043 | return 0; |
| 2044 | } |
| 2045 | |
| 2046 | /* Function: pc_in_mapped_range |
| 2047 | If PC falls into the vma range of SECTION, return true, else false. */ |
| 2048 | |
| 2049 | CORE_ADDR |
| 2050 | pc_in_mapped_range (pc, section) |
| 2051 | CORE_ADDR pc; |
| 2052 | asection *section; |
| 2053 | { |
| 2054 | int size; |
| 2055 | |
| 2056 | if (overlay_debugging) |
| 2057 | if (section && section_is_overlay (section)) |
| 2058 | { |
| 2059 | size = bfd_get_section_size_before_reloc (section); |
| 2060 | if (section->vma <= pc && pc < section->vma + size) |
| 2061 | return 1; |
| 2062 | } |
| 2063 | return 0; |
| 2064 | } |
| 2065 | |
| 2066 | /* Function: overlay_unmapped_address (PC, SECTION) |
| 2067 | Returns the address corresponding to PC in the unmapped (load) range. |
| 2068 | May be the same as PC. */ |
| 2069 | |
| 2070 | CORE_ADDR |
| 2071 | overlay_unmapped_address (pc, section) |
| 2072 | CORE_ADDR pc; |
| 2073 | asection *section; |
| 2074 | { |
| 2075 | if (overlay_debugging) |
| 2076 | if (section && section_is_overlay (section) && |
| 2077 | pc_in_mapped_range (pc, section)) |
| 2078 | return pc + section->lma - section->vma; |
| 2079 | |
| 2080 | return pc; |
| 2081 | } |
| 2082 | |
| 2083 | /* Function: overlay_mapped_address (PC, SECTION) |
| 2084 | Returns the address corresponding to PC in the mapped (runtime) range. |
| 2085 | May be the same as PC. */ |
| 2086 | |
| 2087 | CORE_ADDR |
| 2088 | overlay_mapped_address (pc, section) |
| 2089 | CORE_ADDR pc; |
| 2090 | asection *section; |
| 2091 | { |
| 2092 | if (overlay_debugging) |
| 2093 | if (section && section_is_overlay (section) && |
| 2094 | pc_in_unmapped_range (pc, section)) |
| 2095 | return pc + section->vma - section->lma; |
| 2096 | |
| 2097 | return pc; |
| 2098 | } |
| 2099 | |
| 2100 | |
| 2101 | /* Function: symbol_overlayed_address |
| 2102 | Return one of two addresses (relative to the VMA or to the LMA), |
| 2103 | depending on whether the section is mapped or not. */ |
| 2104 | |
| 2105 | CORE_ADDR |
| 2106 | symbol_overlayed_address (address, section) |
| 2107 | CORE_ADDR address; |
| 2108 | asection *section; |
| 2109 | { |
| 2110 | if (overlay_debugging) |
| 2111 | { |
| 2112 | /* If the symbol has no section, just return its regular address. */ |
| 2113 | if (section == 0) |
| 2114 | return address; |
| 2115 | /* If the symbol's section is not an overlay, just return its address */ |
| 2116 | if (!section_is_overlay (section)) |
| 2117 | return address; |
| 2118 | /* If the symbol's section is mapped, just return its address */ |
| 2119 | if (section_is_mapped (section)) |
| 2120 | return address; |
| 2121 | /* |
| 2122 | * HOWEVER: if the symbol is in an overlay section which is NOT mapped, |
| 2123 | * then return its LOADED address rather than its vma address!! |
| 2124 | */ |
| 2125 | return overlay_unmapped_address (address, section); |
| 2126 | } |
| 2127 | return address; |
| 2128 | } |
| 2129 | |
| 2130 | /* Function: find_pc_overlay (PC) |
| 2131 | Return the best-match overlay section for PC: |
| 2132 | If PC matches a mapped overlay section's VMA, return that section. |
| 2133 | Else if PC matches an unmapped section's VMA, return that section. |
| 2134 | Else if PC matches an unmapped section's LMA, return that section. */ |
| 2135 | |
| 2136 | asection * |
| 2137 | find_pc_overlay (pc) |
| 2138 | CORE_ADDR pc; |
| 2139 | { |
| 2140 | struct objfile *objfile; |
| 2141 | struct obj_section *osect, *best_match = NULL; |
| 2142 | |
| 2143 | if (overlay_debugging) |
| 2144 | ALL_OBJSECTIONS (objfile, osect) |
| 2145 | if (section_is_overlay (osect->the_bfd_section)) |
| 2146 | { |
| 2147 | if (pc_in_mapped_range (pc, osect->the_bfd_section)) |
| 2148 | { |
| 2149 | if (overlay_is_mapped (osect)) |
| 2150 | return osect->the_bfd_section; |
| 2151 | else |
| 2152 | best_match = osect; |
| 2153 | } |
| 2154 | else if (pc_in_unmapped_range (pc, osect->the_bfd_section)) |
| 2155 | best_match = osect; |
| 2156 | } |
| 2157 | return best_match ? best_match->the_bfd_section : NULL; |
| 2158 | } |
| 2159 | |
| 2160 | /* Function: find_pc_mapped_section (PC) |
| 2161 | If PC falls into the VMA address range of an overlay section that is |
| 2162 | currently marked as MAPPED, return that section. Else return NULL. */ |
| 2163 | |
| 2164 | asection * |
| 2165 | find_pc_mapped_section (pc) |
| 2166 | CORE_ADDR pc; |
| 2167 | { |
| 2168 | struct objfile *objfile; |
| 2169 | struct obj_section *osect; |
| 2170 | |
| 2171 | if (overlay_debugging) |
| 2172 | ALL_OBJSECTIONS (objfile, osect) |
| 2173 | if (pc_in_mapped_range (pc, osect->the_bfd_section) && |
| 2174 | overlay_is_mapped (osect)) |
| 2175 | return osect->the_bfd_section; |
| 2176 | |
| 2177 | return NULL; |
| 2178 | } |
| 2179 | |
| 2180 | /* Function: list_overlays_command |
| 2181 | Print a list of mapped sections and their PC ranges */ |
| 2182 | |
| 2183 | void |
| 2184 | list_overlays_command (args, from_tty) |
| 2185 | char *args; |
| 2186 | int from_tty; |
| 2187 | { |
| 2188 | int nmapped = 0; |
| 2189 | struct objfile *objfile; |
| 2190 | struct obj_section *osect; |
| 2191 | |
| 2192 | if (overlay_debugging) |
| 2193 | ALL_OBJSECTIONS (objfile, osect) |
| 2194 | if (overlay_is_mapped (osect)) |
| 2195 | { |
| 2196 | const char *name; |
| 2197 | bfd_vma lma, vma; |
| 2198 | int size; |
| 2199 | |
| 2200 | vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section); |
| 2201 | lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section); |
| 2202 | size = bfd_get_section_size_before_reloc (osect->the_bfd_section); |
| 2203 | name = bfd_section_name (objfile->obfd, osect->the_bfd_section); |
| 2204 | printf_filtered ("Section %s, loaded at %08x - %08x, ", |
| 2205 | name, lma, lma + size); |
| 2206 | printf_filtered ("mapped at %08x - %08x\n", |
| 2207 | vma, vma + size); |
| 2208 | nmapped ++; |
| 2209 | } |
| 2210 | if (nmapped == 0) |
| 2211 | printf_filtered ("No sections are mapped.\n"); |
| 2212 | } |
| 2213 | |
| 2214 | /* Function: map_overlay_command |
| 2215 | Mark the named section as mapped (ie. residing at its VMA address). */ |
| 2216 | |
| 2217 | void |
| 2218 | map_overlay_command (args, from_tty) |
| 2219 | char *args; |
| 2220 | int from_tty; |
| 2221 | { |
| 2222 | struct objfile *objfile, *objfile2; |
| 2223 | struct obj_section *sec, *sec2; |
| 2224 | asection *bfdsec; |
| 2225 | |
| 2226 | if (!overlay_debugging) |
| 2227 | error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command."); |
| 2228 | |
| 2229 | if (args == 0 || *args == 0) |
| 2230 | error ("Argument required: name of an overlay section"); |
| 2231 | |
| 2232 | /* First, find a section matching the user supplied argument */ |
| 2233 | ALL_OBJSECTIONS (objfile, sec) |
| 2234 | if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) |
| 2235 | { |
| 2236 | /* Now, check to see if the section is an overlay. */ |
| 2237 | bfdsec = sec->the_bfd_section; |
| 2238 | if (!section_is_overlay (bfdsec)) |
| 2239 | continue; /* not an overlay section */ |
| 2240 | |
| 2241 | /* Mark the overlay as "mapped" */ |
| 2242 | sec->ovly_mapped = 1; |
| 2243 | |
| 2244 | /* Next, make a pass and unmap any sections that are |
| 2245 | overlapped by this new section: */ |
| 2246 | ALL_OBJSECTIONS (objfile2, sec2) |
| 2247 | if (sec2->ovly_mapped && |
| 2248 | sec != sec2 && |
| 2249 | sec->the_bfd_section != sec2->the_bfd_section && |
| 2250 | (pc_in_mapped_range (sec2->addr, sec->the_bfd_section) || |
| 2251 | pc_in_mapped_range (sec2->endaddr, sec->the_bfd_section))) |
| 2252 | { |
| 2253 | if (info_verbose) |
| 2254 | printf_filtered ("Note: section %s unmapped by overlap\n", |
| 2255 | bfd_section_name (objfile->obfd, |
| 2256 | sec2->the_bfd_section)); |
| 2257 | sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */ |
| 2258 | } |
| 2259 | return; |
| 2260 | } |
| 2261 | error ("No overlay section called %s", args); |
| 2262 | } |
| 2263 | |
| 2264 | /* Function: unmap_overlay_command |
| 2265 | Mark the overlay section as unmapped |
| 2266 | (ie. resident in its LMA address range, rather than the VMA range). */ |
| 2267 | |
| 2268 | void |
| 2269 | unmap_overlay_command (args, from_tty) |
| 2270 | char *args; |
| 2271 | int from_tty; |
| 2272 | { |
| 2273 | struct objfile *objfile; |
| 2274 | struct obj_section *sec; |
| 2275 | |
| 2276 | if (!overlay_debugging) |
| 2277 | error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command."); |
| 2278 | |
| 2279 | if (args == 0 || *args == 0) |
| 2280 | error ("Argument required: name of an overlay section"); |
| 2281 | |
| 2282 | /* First, find a section matching the user supplied argument */ |
| 2283 | ALL_OBJSECTIONS (objfile, sec) |
| 2284 | if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) |
| 2285 | { |
| 2286 | if (!sec->ovly_mapped) |
| 2287 | error ("Section %s is not mapped", args); |
| 2288 | sec->ovly_mapped = 0; |
| 2289 | return; |
| 2290 | } |
| 2291 | error ("No overlay section called %s", args); |
| 2292 | } |
| 2293 | |
| 2294 | /* Function: overlay_auto_command |
| 2295 | A utility command to turn on overlay debugging. |
| 2296 | Possibly this should be done via a set/show command. */ |
| 2297 | |
| 2298 | static void |
| 2299 | overlay_auto_command (args, from_tty) |
| 2300 | { |
| 2301 | overlay_debugging = -1; |
| 2302 | if (info_verbose) |
| 2303 | printf_filtered ("Automatic overlay debugging enabled."); |
| 2304 | } |
| 2305 | |
| 2306 | /* Function: overlay_manual_command |
| 2307 | A utility command to turn on overlay debugging. |
| 2308 | Possibly this should be done via a set/show command. */ |
| 2309 | |
| 2310 | static void |
| 2311 | overlay_manual_command (args, from_tty) |
| 2312 | { |
| 2313 | overlay_debugging = 1; |
| 2314 | if (info_verbose) |
| 2315 | printf_filtered ("Overlay debugging enabled."); |
| 2316 | } |
| 2317 | |
| 2318 | /* Function: overlay_off_command |
| 2319 | A utility command to turn on overlay debugging. |
| 2320 | Possibly this should be done via a set/show command. */ |
| 2321 | |
| 2322 | static void |
| 2323 | overlay_off_command (args, from_tty) |
| 2324 | { |
| 2325 | overlay_debugging = 0; |
| 2326 | if (info_verbose) |
| 2327 | printf_filtered ("Overlay debugging disabled."); |
| 2328 | } |
| 2329 | |
| 2330 | static void |
| 2331 | overlay_load_command (args, from_tty) |
| 2332 | { |
| 2333 | if (target_overlay_update) |
| 2334 | (*target_overlay_update) (NULL); |
| 2335 | else |
| 2336 | error ("This target does not know how to read its overlay state."); |
| 2337 | } |
| 2338 | |
| 2339 | /* Function: overlay_command |
| 2340 | A place-holder for a mis-typed command */ |
| 2341 | |
| 2342 | /* Command list chain containing all defined "overlay" subcommands. */ |
| 2343 | struct cmd_list_element *overlaylist; |
| 2344 | |
| 2345 | static void |
| 2346 | overlay_command (args, from_tty) |
| 2347 | char *args; |
| 2348 | int from_tty; |
| 2349 | { |
| 2350 | printf_unfiltered |
| 2351 | ("\"overlay\" must be followed by the name of an overlay command.\n"); |
| 2352 | help_list (overlaylist, "overlay ", -1, gdb_stdout); |
| 2353 | } |
| 2354 | |
| 2355 | |
| 2356 | /* Target Overlays for the "Simplest" overlay manager: |
| 2357 | |
| 2358 | This is GDB's default target overlay layer. It works with the |
| 2359 | minimal overlay manager supplied as an example by Cygnus. The |
| 2360 | entry point is via a function pointer "target_overlay_update", |
| 2361 | so targets that use a different runtime overlay manager can |
| 2362 | substitute their own overlay_update function and take over the |
| 2363 | function pointer. |
| 2364 | |
| 2365 | The overlay_update function pokes around in the target's data structures |
| 2366 | to see what overlays are mapped, and updates GDB's overlay mapping with |
| 2367 | this information. |
| 2368 | |
| 2369 | In this simple implementation, the target data structures are as follows: |
| 2370 | unsigned _novlys; /# number of overlay sections #/ |
| 2371 | unsigned _ovly_table[_novlys][4] = { |
| 2372 | {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/ |
| 2373 | {..., ..., ..., ...}, |
| 2374 | } |
| 2375 | unsigned _novly_regions; /# number of overlay regions #/ |
| 2376 | unsigned _ovly_region_table[_novly_regions][3] = { |
| 2377 | {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/ |
| 2378 | {..., ..., ...}, |
| 2379 | } |
| 2380 | These functions will attempt to update GDB's mappedness state in the |
| 2381 | symbol section table, based on the target's mappedness state. |
| 2382 | |
| 2383 | To do this, we keep a cached copy of the target's _ovly_table, and |
| 2384 | attempt to detect when the cached copy is invalidated. The main |
| 2385 | entry point is "simple_overlay_update(SECT), which looks up SECT in |
| 2386 | the cached table and re-reads only the entry for that section from |
| 2387 | the target (whenever possible). |
| 2388 | */ |
| 2389 | |
| 2390 | /* Cached, dynamically allocated copies of the target data structures: */ |
| 2391 | static unsigned (*cache_ovly_table)[4] = 0; |
| 2392 | #if 0 |
| 2393 | static unsigned (*cache_ovly_region_table)[3] = 0; |
| 2394 | #endif |
| 2395 | static unsigned cache_novlys = 0; |
| 2396 | #if 0 |
| 2397 | static unsigned cache_novly_regions = 0; |
| 2398 | #endif |
| 2399 | static CORE_ADDR cache_ovly_table_base = 0; |
| 2400 | #if 0 |
| 2401 | static CORE_ADDR cache_ovly_region_table_base = 0; |
| 2402 | #endif |
| 2403 | enum ovly_index { VMA, SIZE, LMA, MAPPED}; |
| 2404 | #define TARGET_INT_BYTES (TARGET_INT_BIT / TARGET_CHAR_BIT) |
| 2405 | |
| 2406 | /* Throw away the cached copy of _ovly_table */ |
| 2407 | static void |
| 2408 | simple_free_overlay_table () |
| 2409 | { |
| 2410 | if (cache_ovly_table) |
| 2411 | free(cache_ovly_table); |
| 2412 | cache_novlys = 0; |
| 2413 | cache_ovly_table = NULL; |
| 2414 | cache_ovly_table_base = 0; |
| 2415 | } |
| 2416 | |
| 2417 | #if 0 |
| 2418 | /* Throw away the cached copy of _ovly_region_table */ |
| 2419 | static void |
| 2420 | simple_free_overlay_region_table () |
| 2421 | { |
| 2422 | if (cache_ovly_region_table) |
| 2423 | free(cache_ovly_region_table); |
| 2424 | cache_novly_regions = 0; |
| 2425 | cache_ovly_region_table = NULL; |
| 2426 | cache_ovly_region_table_base = 0; |
| 2427 | } |
| 2428 | #endif |
| 2429 | |
| 2430 | /* Read an array of ints from the target into a local buffer. |
| 2431 | Convert to host order. int LEN is number of ints */ |
| 2432 | static void |
| 2433 | read_target_int_array (memaddr, myaddr, len) |
| 2434 | CORE_ADDR memaddr; |
| 2435 | unsigned int *myaddr; |
| 2436 | int len; |
| 2437 | { |
| 2438 | char *buf = alloca (len * TARGET_INT_BYTES); |
| 2439 | int i; |
| 2440 | |
| 2441 | read_memory (memaddr, buf, len * TARGET_INT_BYTES); |
| 2442 | for (i = 0; i < len; i++) |
| 2443 | myaddr[i] = extract_unsigned_integer (TARGET_INT_BYTES * i + buf, |
| 2444 | TARGET_INT_BYTES); |
| 2445 | } |
| 2446 | |
| 2447 | /* Find and grab a copy of the target _ovly_table |
| 2448 | (and _novlys, which is needed for the table's size) */ |
| 2449 | static int |
| 2450 | simple_read_overlay_table () |
| 2451 | { |
| 2452 | struct minimal_symbol *msym; |
| 2453 | |
| 2454 | simple_free_overlay_table (); |
| 2455 | msym = lookup_minimal_symbol ("_novlys", 0, 0); |
| 2456 | if (msym != NULL) |
| 2457 | cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4); |
| 2458 | else |
| 2459 | return 0; /* failure */ |
| 2460 | cache_ovly_table = (void *) xmalloc (cache_novlys * sizeof(*cache_ovly_table)); |
| 2461 | if (cache_ovly_table != NULL) |
| 2462 | { |
| 2463 | msym = lookup_minimal_symbol ("_ovly_table", 0, 0); |
| 2464 | if (msym != NULL) |
| 2465 | { |
| 2466 | cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (msym); |
| 2467 | read_target_int_array (cache_ovly_table_base, |
| 2468 | (int *) cache_ovly_table, |
| 2469 | cache_novlys * 4); |
| 2470 | } |
| 2471 | else |
| 2472 | return 0; /* failure */ |
| 2473 | } |
| 2474 | else |
| 2475 | return 0; /* failure */ |
| 2476 | return 1; /* SUCCESS */ |
| 2477 | } |
| 2478 | |
| 2479 | #if 0 |
| 2480 | /* Find and grab a copy of the target _ovly_region_table |
| 2481 | (and _novly_regions, which is needed for the table's size) */ |
| 2482 | static int |
| 2483 | simple_read_overlay_region_table () |
| 2484 | { |
| 2485 | struct minimal_symbol *msym; |
| 2486 | |
| 2487 | simple_free_overlay_region_table (); |
| 2488 | msym = lookup_minimal_symbol ("_novly_regions", 0, 0); |
| 2489 | if (msym != NULL) |
| 2490 | cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4); |
| 2491 | else |
| 2492 | return 0; /* failure */ |
| 2493 | cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12); |
| 2494 | if (cache_ovly_region_table != NULL) |
| 2495 | { |
| 2496 | msym = lookup_minimal_symbol ("_ovly_region_table", 0, 0); |
| 2497 | if (msym != NULL) |
| 2498 | { |
| 2499 | cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym); |
| 2500 | read_target_int_array (cache_ovly_region_table_base, |
| 2501 | (int *) cache_ovly_region_table, |
| 2502 | cache_novly_regions * 3); |
| 2503 | } |
| 2504 | else |
| 2505 | return 0; /* failure */ |
| 2506 | } |
| 2507 | else |
| 2508 | return 0; /* failure */ |
| 2509 | return 1; /* SUCCESS */ |
| 2510 | } |
| 2511 | #endif |
| 2512 | |
| 2513 | /* Function: simple_overlay_update_1 |
| 2514 | A helper function for simple_overlay_update. Assuming a cached copy |
| 2515 | of _ovly_table exists, look through it to find an entry whose vma, |
| 2516 | lma and size match those of OSECT. Re-read the entry and make sure |
| 2517 | it still matches OSECT (else the table may no longer be valid). |
| 2518 | Set OSECT's mapped state to match the entry. Return: 1 for |
| 2519 | success, 0 for failure. */ |
| 2520 | |
| 2521 | static int |
| 2522 | simple_overlay_update_1 (osect) |
| 2523 | struct obj_section *osect; |
| 2524 | { |
| 2525 | int i, size; |
| 2526 | |
| 2527 | size = bfd_get_section_size_before_reloc (osect->the_bfd_section); |
| 2528 | for (i = 0; i < cache_novlys; i++) |
| 2529 | if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma && |
| 2530 | cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* && |
| 2531 | cache_ovly_table[i][SIZE] == size */) |
| 2532 | { |
| 2533 | read_target_int_array (cache_ovly_table_base + i * TARGET_INT_BYTES, |
| 2534 | (int *) &cache_ovly_table[i], 4); |
| 2535 | if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma && |
| 2536 | cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* && |
| 2537 | cache_ovly_table[i][SIZE] == size */) |
| 2538 | { |
| 2539 | osect->ovly_mapped = cache_ovly_table[i][MAPPED]; |
| 2540 | return 1; |
| 2541 | } |
| 2542 | else /* Warning! Warning! Target's ovly table has changed! */ |
| 2543 | return 0; |
| 2544 | } |
| 2545 | return 0; |
| 2546 | } |
| 2547 | |
| 2548 | /* Function: simple_overlay_update |
| 2549 | If OSECT is NULL, then update all sections' mapped state |
| 2550 | (after re-reading the entire target _ovly_table). |
| 2551 | If OSECT is non-NULL, then try to find a matching entry in the |
| 2552 | cached ovly_table and update only OSECT's mapped state. |
| 2553 | If a cached entry can't be found or the cache isn't valid, then |
| 2554 | re-read the entire cache, and go ahead and update all sections. */ |
| 2555 | |
| 2556 | static void |
| 2557 | simple_overlay_update (osect) |
| 2558 | struct obj_section *osect; |
| 2559 | { |
| 2560 | struct objfile *objfile; |
| 2561 | |
| 2562 | /* Were we given an osect to look up? NULL means do all of them. */ |
| 2563 | if (osect) |
| 2564 | /* Have we got a cached copy of the target's overlay table? */ |
| 2565 | if (cache_ovly_table != NULL) |
| 2566 | /* Does its cached location match what's currently in the symtab? */ |
| 2567 | if (cache_ovly_table_base == |
| 2568 | SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0))) |
| 2569 | /* Then go ahead and try to look up this single section in the cache */ |
| 2570 | if (simple_overlay_update_1 (osect)) |
| 2571 | /* Found it! We're done. */ |
| 2572 | return; |
| 2573 | |
| 2574 | /* Cached table no good: need to read the entire table anew. |
| 2575 | Or else we want all the sections, in which case it's actually |
| 2576 | more efficient to read the whole table in one block anyway. */ |
| 2577 | |
| 2578 | if (simple_read_overlay_table () == 0) /* read failed? No table? */ |
| 2579 | { |
| 2580 | warning ("Failed to read the target overlay mapping table."); |
| 2581 | return; |
| 2582 | } |
| 2583 | /* Now may as well update all sections, even if only one was requested. */ |
| 2584 | ALL_OBJSECTIONS (objfile, osect) |
| 2585 | if (section_is_overlay (osect->the_bfd_section)) |
| 2586 | { |
| 2587 | int i, size; |
| 2588 | |
| 2589 | size = bfd_get_section_size_before_reloc (osect->the_bfd_section); |
| 2590 | for (i = 0; i < cache_novlys; i++) |
| 2591 | if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma && |
| 2592 | cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* && |
| 2593 | cache_ovly_table[i][SIZE] == size */) |
| 2594 | { /* obj_section matches i'th entry in ovly_table */ |
| 2595 | osect->ovly_mapped = cache_ovly_table[i][MAPPED]; |
| 2596 | break; /* finished with inner for loop: break out */ |
| 2597 | } |
| 2598 | } |
| 2599 | } |
| 2600 | |
| 2601 | |
| 2602 | void |
| 2603 | _initialize_symfile () |
| 2604 | { |
| 2605 | struct cmd_list_element *c; |
| 2606 | |
| 2607 | c = add_cmd ("symbol-file", class_files, symbol_file_command, |
| 2608 | "Load symbol table from executable file FILE.\n\ |
| 2609 | The `file' command can also load symbol tables, as well as setting the file\n\ |
| 2610 | to execute.", &cmdlist); |
| 2611 | c->completer = filename_completer; |
| 2612 | |
| 2613 | c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, |
| 2614 | "Usage: add-symbol-file FILE ADDR\n\ |
| 2615 | Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\ |
| 2616 | ADDR is the starting address of the file's text.", |
| 2617 | &cmdlist); |
| 2618 | c->completer = filename_completer; |
| 2619 | |
| 2620 | c = add_cmd ("add-shared-symbol-files", class_files, |
| 2621 | add_shared_symbol_files_command, |
| 2622 | "Load the symbols from shared objects in the dynamic linker's link map.", |
| 2623 | &cmdlist); |
| 2624 | c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1, |
| 2625 | &cmdlist); |
| 2626 | |
| 2627 | c = add_cmd ("load", class_files, load_command, |
| 2628 | "Dynamically load FILE into the running program, and record its symbols\n\ |
| 2629 | for access from GDB.", &cmdlist); |
| 2630 | c->completer = filename_completer; |
| 2631 | |
| 2632 | add_show_from_set |
| 2633 | (add_set_cmd ("symbol-reloading", class_support, var_boolean, |
| 2634 | (char *)&symbol_reloading, |
| 2635 | "Set dynamic symbol table reloading multiple times in one run.", |
| 2636 | &setlist), |
| 2637 | &showlist); |
| 2638 | |
| 2639 | add_prefix_cmd ("overlay", class_support, overlay_command, |
| 2640 | "Commands for debugging overlays.", &overlaylist, |
| 2641 | "overlay ", 0, &cmdlist); |
| 2642 | |
| 2643 | add_com_alias ("ovly", "overlay", class_alias, 1); |
| 2644 | add_com_alias ("ov", "overlay", class_alias, 1); |
| 2645 | |
| 2646 | add_cmd ("map-overlay", class_support, map_overlay_command, |
| 2647 | "Assert that an overlay section is mapped.", &overlaylist); |
| 2648 | |
| 2649 | add_cmd ("unmap-overlay", class_support, unmap_overlay_command, |
| 2650 | "Assert that an overlay section is unmapped.", &overlaylist); |
| 2651 | |
| 2652 | add_cmd ("list-overlays", class_support, list_overlays_command, |
| 2653 | "List mappings of overlay sections.", &overlaylist); |
| 2654 | |
| 2655 | add_cmd ("manual", class_support, overlay_manual_command, |
| 2656 | "Enable overlay debugging.", &overlaylist); |
| 2657 | add_cmd ("off", class_support, overlay_off_command, |
| 2658 | "Disable overlay debugging.", &overlaylist); |
| 2659 | add_cmd ("auto", class_support, overlay_auto_command, |
| 2660 | "Enable automatic overlay debugging.", &overlaylist); |
| 2661 | add_cmd ("load-target", class_support, overlay_load_command, |
| 2662 | "Read the overlay mapping state from the target.", &overlaylist); |
| 2663 | } |