| 1 | /* Read dbx symbol tables and convert to internal format, for GDB. |
| 2 | Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 20 | |
| 21 | /* This module provides three functions: dbx_symfile_init, |
| 22 | which initializes to read a symbol file; dbx_new_init, which |
| 23 | discards existing cached information when all symbols are being |
| 24 | discarded; and dbx_symfile_read, which reads a symbol table |
| 25 | from a file. |
| 26 | |
| 27 | dbx_symfile_read only does the minimum work necessary for letting the |
| 28 | user "name" things symbolically; it does not read the entire symtab. |
| 29 | Instead, it reads the external and static symbols and puts them in partial |
| 30 | symbol tables. When more extensive information is requested of a |
| 31 | file, the corresponding partial symbol table is mutated into a full |
| 32 | fledged symbol table by going back and reading the symbols |
| 33 | for real. dbx_psymtab_to_symtab() is the function that does this */ |
| 34 | |
| 35 | #include "defs.h" |
| 36 | #include <string.h> |
| 37 | |
| 38 | #if defined(USG) || defined(__CYGNUSCLIB__) |
| 39 | #include <sys/types.h> |
| 40 | #include <fcntl.h> |
| 41 | #endif |
| 42 | |
| 43 | #include <obstack.h> |
| 44 | #include <sys/param.h> |
| 45 | #ifndef NO_SYS_FILE |
| 46 | #include <sys/file.h> |
| 47 | #endif |
| 48 | #include <sys/stat.h> |
| 49 | #include <ctype.h> |
| 50 | #include "symtab.h" |
| 51 | #include "breakpoint.h" |
| 52 | #include "command.h" |
| 53 | #include "target.h" |
| 54 | #include "gdbcore.h" /* for bfd stuff */ |
| 55 | #include "libbfd.h" /* FIXME Secret internal BFD stuff (bfd_read) */ |
| 56 | #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */ |
| 57 | #include "symfile.h" |
| 58 | #include "objfiles.h" |
| 59 | #include "buildsym.h" |
| 60 | #include "stabsread.h" |
| 61 | #include "gdb-stabs.h" |
| 62 | #include "demangle.h" |
| 63 | #include "language.h" /* Needed inside partial-stab.h */ |
| 64 | #include "complaints.h" |
| 65 | |
| 66 | #include "aout/aout64.h" |
| 67 | #include "aout/stab_gnu.h" /* We always use GNU stabs, not native, now */ |
| 68 | |
| 69 | #if !defined (SEEK_SET) |
| 70 | #define SEEK_SET 0 |
| 71 | #define SEEK_CUR 1 |
| 72 | #endif |
| 73 | |
| 74 | /* Each partial symbol table entry contains a pointer to private data for the |
| 75 | read_symtab() function to use when expanding a partial symbol table entry |
| 76 | to a full symbol table entry. |
| 77 | |
| 78 | For dbxread this structure contains the offset within the file symbol table |
| 79 | of first local symbol for this file, and length (in bytes) of the section |
| 80 | of the symbol table devoted to this file's symbols (actually, the section |
| 81 | bracketed may contain more than just this file's symbols). It also contains |
| 82 | further information needed to locate the symbols if they are in an ELF file. |
| 83 | |
| 84 | If ldsymlen is 0, the only reason for this thing's existence is the |
| 85 | dependency list. Nothing else will happen when it is read in. */ |
| 86 | |
| 87 | #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff) |
| 88 | #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen) |
| 89 | #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private)) |
| 90 | #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size) |
| 91 | #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset) |
| 92 | #define STRING_OFFSET(p) (SYMLOC(p)->string_offset) |
| 93 | #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset) |
| 94 | |
| 95 | struct symloc { |
| 96 | int ldsymoff; |
| 97 | int ldsymlen; |
| 98 | int symbol_size; |
| 99 | int symbol_offset; |
| 100 | int string_offset; |
| 101 | int file_string_offset; |
| 102 | }; |
| 103 | |
| 104 | /* Macro to determine which symbols to ignore when reading the first symbol |
| 105 | of a file. Some machines override this definition. */ |
| 106 | #ifndef IGNORE_SYMBOL |
| 107 | /* This code is used on Ultrix systems. Ignore it */ |
| 108 | #define IGNORE_SYMBOL(type) (type == (int)N_NSYMS) |
| 109 | #endif |
| 110 | |
| 111 | /* Macro for name of symbol to indicate a file compiled with gcc. */ |
| 112 | #ifndef GCC_COMPILED_FLAG_SYMBOL |
| 113 | #define GCC_COMPILED_FLAG_SYMBOL "gcc_compiled." |
| 114 | #endif |
| 115 | |
| 116 | /* Macro for name of symbol to indicate a file compiled with gcc2. */ |
| 117 | #ifndef GCC2_COMPILED_FLAG_SYMBOL |
| 118 | #define GCC2_COMPILED_FLAG_SYMBOL "gcc2_compiled." |
| 119 | #endif |
| 120 | |
| 121 | /* Define this as 1 if a pcc declaration of a char or short argument |
| 122 | gives the correct address. Otherwise assume pcc gives the |
| 123 | address of the corresponding int, which is not the same on a |
| 124 | big-endian machine. */ |
| 125 | |
| 126 | #ifndef BELIEVE_PCC_PROMOTION |
| 127 | #define BELIEVE_PCC_PROMOTION 0 |
| 128 | #endif |
| 129 | |
| 130 | /* Remember what we deduced to be the source language of this psymtab. */ |
| 131 | |
| 132 | static enum language psymtab_language = language_unknown; |
| 133 | |
| 134 | /* Nonzero means give verbose info on gdb action. From main.c. */ |
| 135 | extern int info_verbose; |
| 136 | |
| 137 | /* The BFD for this file -- implicit parameter to next_symbol_text. */ |
| 138 | |
| 139 | static bfd *symfile_bfd; |
| 140 | |
| 141 | /* The size of each symbol in the symbol file (in external form). |
| 142 | This is set by dbx_symfile_read when building psymtabs, and by |
| 143 | dbx_psymtab_to_symtab when building symtabs. */ |
| 144 | |
| 145 | static unsigned symbol_size; |
| 146 | |
| 147 | /* This is the offset of the symbol table in the executable file */ |
| 148 | static unsigned symbol_table_offset; |
| 149 | |
| 150 | /* This is the offset of the string table in the executable file */ |
| 151 | static unsigned string_table_offset; |
| 152 | |
| 153 | /* For elf+stab executables, the n_strx field is not a simple index |
| 154 | into the string table. Instead, each .o file has a base offset |
| 155 | in the string table, and the associated symbols contain offsets |
| 156 | from this base. The following two variables contain the base |
| 157 | offset for the current and next .o files. */ |
| 158 | static unsigned int file_string_table_offset; |
| 159 | static unsigned int next_file_string_table_offset; |
| 160 | |
| 161 | /* Complaints about the symbols we have encountered. */ |
| 162 | |
| 163 | struct complaint lbrac_complaint = |
| 164 | {"bad block start address patched", 0, 0}; |
| 165 | |
| 166 | struct complaint string_table_offset_complaint = |
| 167 | {"bad string table offset in symbol %d", 0, 0}; |
| 168 | |
| 169 | struct complaint unknown_symtype_complaint = |
| 170 | {"unknown symbol type %s", 0, 0}; |
| 171 | |
| 172 | struct complaint unknown_symchar_complaint = |
| 173 | {"unknown symbol type character `%c'", 0, 0}; |
| 174 | |
| 175 | struct complaint lbrac_rbrac_complaint = |
| 176 | {"block start larger than block end", 0, 0}; |
| 177 | |
| 178 | struct complaint lbrac_unmatched_complaint = |
| 179 | {"unmatched N_LBRAC before symtab pos %d", 0, 0}; |
| 180 | |
| 181 | struct complaint lbrac_mismatch_complaint = |
| 182 | {"N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d", 0, 0}; |
| 183 | |
| 184 | struct complaint repeated_header_complaint = |
| 185 | {"\"repeated\" header file not previously seen, at symtab pos %d", 0, 0}; |
| 186 | |
| 187 | struct complaint repeated_header_name_complaint = |
| 188 | {"\"repeated\" header file not previously seen, named %s", 0, 0}; |
| 189 | \f |
| 190 | /* During initial symbol readin, we need to have a structure to keep |
| 191 | track of which psymtabs have which bincls in them. This structure |
| 192 | is used during readin to setup the list of dependencies within each |
| 193 | partial symbol table. */ |
| 194 | |
| 195 | struct header_file_location |
| 196 | { |
| 197 | char *name; /* Name of header file */ |
| 198 | int instance; /* See above */ |
| 199 | struct partial_symtab *pst; /* Partial symtab that has the |
| 200 | BINCL/EINCL defs for this file */ |
| 201 | }; |
| 202 | |
| 203 | /* The actual list and controling variables */ |
| 204 | static struct header_file_location *bincl_list, *next_bincl; |
| 205 | static int bincls_allocated; |
| 206 | |
| 207 | /* Local function prototypes */ |
| 208 | |
| 209 | static void |
| 210 | free_header_files PARAMS ((void)); |
| 211 | |
| 212 | static void |
| 213 | init_header_files PARAMS ((void)); |
| 214 | |
| 215 | static struct pending * |
| 216 | copy_pending PARAMS ((struct pending *, int, struct pending *)); |
| 217 | |
| 218 | static void |
| 219 | read_ofile_symtab PARAMS ((struct partial_symtab *)); |
| 220 | |
| 221 | static void |
| 222 | dbx_psymtab_to_symtab PARAMS ((struct partial_symtab *)); |
| 223 | |
| 224 | static void |
| 225 | dbx_psymtab_to_symtab_1 PARAMS ((struct partial_symtab *)); |
| 226 | |
| 227 | static void |
| 228 | read_dbx_symtab PARAMS ((struct section_offsets *, struct objfile *, |
| 229 | CORE_ADDR, int)); |
| 230 | |
| 231 | static void |
| 232 | free_bincl_list PARAMS ((struct objfile *)); |
| 233 | |
| 234 | static struct partial_symtab * |
| 235 | find_corresponding_bincl_psymtab PARAMS ((char *, int)); |
| 236 | |
| 237 | static void |
| 238 | add_bincl_to_list PARAMS ((struct partial_symtab *, char *, int)); |
| 239 | |
| 240 | static void |
| 241 | init_bincl_list PARAMS ((int, struct objfile *)); |
| 242 | |
| 243 | static void |
| 244 | init_psymbol_list PARAMS ((struct objfile *)); |
| 245 | |
| 246 | static char * |
| 247 | dbx_next_symbol_text PARAMS ((void)); |
| 248 | |
| 249 | static void |
| 250 | fill_symbuf PARAMS ((bfd *)); |
| 251 | |
| 252 | static void |
| 253 | dbx_symfile_init PARAMS ((struct objfile *)); |
| 254 | |
| 255 | static void |
| 256 | dbx_new_init PARAMS ((struct objfile *)); |
| 257 | |
| 258 | static void |
| 259 | dbx_symfile_read PARAMS ((struct objfile *, struct section_offsets *, int)); |
| 260 | |
| 261 | static void |
| 262 | dbx_symfile_finish PARAMS ((struct objfile *)); |
| 263 | |
| 264 | static void |
| 265 | record_minimal_symbol PARAMS ((char *, CORE_ADDR, int, struct objfile *)); |
| 266 | |
| 267 | static void |
| 268 | add_new_header_file PARAMS ((char *, int)); |
| 269 | |
| 270 | static void |
| 271 | add_old_header_file PARAMS ((char *, int)); |
| 272 | |
| 273 | static void |
| 274 | add_this_object_header_file PARAMS ((int)); |
| 275 | |
| 276 | /* Free up old header file tables */ |
| 277 | |
| 278 | static void |
| 279 | free_header_files () |
| 280 | { |
| 281 | register int i; |
| 282 | |
| 283 | if (header_files != NULL) |
| 284 | { |
| 285 | for (i = 0; i < n_header_files; i++) |
| 286 | { |
| 287 | free (header_files[i].name); |
| 288 | } |
| 289 | free ((PTR)header_files); |
| 290 | header_files = NULL; |
| 291 | n_header_files = 0; |
| 292 | } |
| 293 | if (this_object_header_files) |
| 294 | { |
| 295 | free ((PTR)this_object_header_files); |
| 296 | this_object_header_files = NULL; |
| 297 | } |
| 298 | n_allocated_header_files = 0; |
| 299 | n_allocated_this_object_header_files = 0; |
| 300 | } |
| 301 | |
| 302 | /* Allocate new header file tables */ |
| 303 | |
| 304 | static void |
| 305 | init_header_files () |
| 306 | { |
| 307 | n_header_files = 0; |
| 308 | n_allocated_header_files = 10; |
| 309 | header_files = (struct header_file *) |
| 310 | xmalloc (10 * sizeof (struct header_file)); |
| 311 | |
| 312 | n_allocated_this_object_header_files = 10; |
| 313 | this_object_header_files = (int *) xmalloc (10 * sizeof (int)); |
| 314 | } |
| 315 | |
| 316 | /* Add header file number I for this object file |
| 317 | at the next successive FILENUM. */ |
| 318 | |
| 319 | static void |
| 320 | add_this_object_header_file (i) |
| 321 | int i; |
| 322 | { |
| 323 | if (n_this_object_header_files == n_allocated_this_object_header_files) |
| 324 | { |
| 325 | n_allocated_this_object_header_files *= 2; |
| 326 | this_object_header_files |
| 327 | = (int *) xrealloc ((char *) this_object_header_files, |
| 328 | n_allocated_this_object_header_files * sizeof (int)); |
| 329 | } |
| 330 | |
| 331 | this_object_header_files[n_this_object_header_files++] = i; |
| 332 | } |
| 333 | |
| 334 | /* Add to this file an "old" header file, one already seen in |
| 335 | a previous object file. NAME is the header file's name. |
| 336 | INSTANCE is its instance code, to select among multiple |
| 337 | symbol tables for the same header file. */ |
| 338 | |
| 339 | static void |
| 340 | add_old_header_file (name, instance) |
| 341 | char *name; |
| 342 | int instance; |
| 343 | { |
| 344 | register struct header_file *p = header_files; |
| 345 | register int i; |
| 346 | |
| 347 | for (i = 0; i < n_header_files; i++) |
| 348 | if (STREQ (p[i].name, name) && instance == p[i].instance) |
| 349 | { |
| 350 | add_this_object_header_file (i); |
| 351 | return; |
| 352 | } |
| 353 | complain (&repeated_header_complaint, symnum); |
| 354 | complain (&repeated_header_name_complaint, name); |
| 355 | } |
| 356 | |
| 357 | /* Add to this file a "new" header file: definitions for its types follow. |
| 358 | NAME is the header file's name. |
| 359 | Most often this happens only once for each distinct header file, |
| 360 | but not necessarily. If it happens more than once, INSTANCE has |
| 361 | a different value each time, and references to the header file |
| 362 | use INSTANCE values to select among them. |
| 363 | |
| 364 | dbx output contains "begin" and "end" markers for each new header file, |
| 365 | but at this level we just need to know which files there have been; |
| 366 | so we record the file when its "begin" is seen and ignore the "end". */ |
| 367 | |
| 368 | static void |
| 369 | add_new_header_file (name, instance) |
| 370 | char *name; |
| 371 | int instance; |
| 372 | { |
| 373 | register int i; |
| 374 | |
| 375 | /* Make sure there is room for one more header file. */ |
| 376 | |
| 377 | if (n_header_files == n_allocated_header_files) |
| 378 | { |
| 379 | n_allocated_header_files *= 2; |
| 380 | header_files = (struct header_file *) |
| 381 | xrealloc ((char *) header_files, |
| 382 | (n_allocated_header_files * sizeof (struct header_file))); |
| 383 | } |
| 384 | |
| 385 | /* Create an entry for this header file. */ |
| 386 | |
| 387 | i = n_header_files++; |
| 388 | header_files[i].name = savestring (name, strlen(name)); |
| 389 | header_files[i].instance = instance; |
| 390 | header_files[i].length = 10; |
| 391 | header_files[i].vector |
| 392 | = (struct type **) xmalloc (10 * sizeof (struct type *)); |
| 393 | memset (header_files[i].vector, 0, 10 * sizeof (struct type *)); |
| 394 | |
| 395 | add_this_object_header_file (i); |
| 396 | } |
| 397 | |
| 398 | #if 0 |
| 399 | static struct type ** |
| 400 | explicit_lookup_type (real_filenum, index) |
| 401 | int real_filenum, index; |
| 402 | { |
| 403 | register struct header_file *f = &header_files[real_filenum]; |
| 404 | |
| 405 | if (index >= f->length) |
| 406 | { |
| 407 | f->length *= 2; |
| 408 | f->vector = (struct type **) |
| 409 | xrealloc (f->vector, f->length * sizeof (struct type *)); |
| 410 | memset (&f->vector[f->length / 2], |
| 411 | '\0', f->length * sizeof (struct type *) / 2); |
| 412 | } |
| 413 | return &f->vector[index]; |
| 414 | } |
| 415 | #endif |
| 416 | \f |
| 417 | static void |
| 418 | record_minimal_symbol (name, address, type, objfile) |
| 419 | char *name; |
| 420 | CORE_ADDR address; |
| 421 | int type; |
| 422 | struct objfile *objfile; |
| 423 | { |
| 424 | enum minimal_symbol_type ms_type; |
| 425 | |
| 426 | switch (type) |
| 427 | { |
| 428 | case N_TEXT | N_EXT: ms_type = mst_text; break; |
| 429 | case N_DATA | N_EXT: ms_type = mst_data; break; |
| 430 | case N_BSS | N_EXT: ms_type = mst_bss; break; |
| 431 | case N_ABS | N_EXT: ms_type = mst_abs; break; |
| 432 | #ifdef N_SETV |
| 433 | case N_SETV | N_EXT: ms_type = mst_data; break; |
| 434 | case N_SETV: |
| 435 | /* I don't think this type actually exists; since a N_SETV is the result |
| 436 | of going over many .o files, it doesn't make sense to have one |
| 437 | file local. */ |
| 438 | ms_type = mst_file_data; |
| 439 | break; |
| 440 | #endif |
| 441 | case N_TEXT: |
| 442 | /* Don't put gcc_compiled, __gnu_compiled_cplus, and friends into |
| 443 | the minimal symbols, because if there is also another symbol |
| 444 | at the same address (e.g. the first function of the file), |
| 445 | lookup_minimal_symbol_by_pc would have no way of getting the |
| 446 | right one. */ |
| 447 | if (name[0] == 'g' |
| 448 | && (strcmp (name, GCC_COMPILED_FLAG_SYMBOL) == 0 |
| 449 | || strcmp (name, GCC2_COMPILED_FLAG_SYMBOL) == 0)) |
| 450 | return; |
| 451 | |
| 452 | { |
| 453 | char *tempstring = name; |
| 454 | if (tempstring[0] == bfd_get_symbol_leading_char (objfile->obfd)) |
| 455 | ++tempstring; |
| 456 | if (STREQN (tempstring, "__gnu_compiled", 14)) |
| 457 | return; |
| 458 | } |
| 459 | |
| 460 | case N_NBTEXT: |
| 461 | case N_FN: |
| 462 | case N_FN_SEQ: |
| 463 | ms_type = mst_file_text; |
| 464 | break; |
| 465 | |
| 466 | case N_DATA: |
| 467 | ms_type = mst_file_data; |
| 468 | |
| 469 | /* Check for __DYNAMIC, which is used by Sun shared libraries. |
| 470 | Record it as global even if it's local, not global, so |
| 471 | lookup_minimal_symbol can find it. We don't check symbol_leading_char |
| 472 | because for SunOS4 it always is '_'. */ |
| 473 | if (name[8] == 'C' && STREQ ("__DYNAMIC", name)) |
| 474 | ms_type = mst_data; |
| 475 | |
| 476 | /* Same with virtual function tables, both global and static. */ |
| 477 | { |
| 478 | char *tempstring = name; |
| 479 | if (tempstring[0] == bfd_get_symbol_leading_char (objfile->obfd)) |
| 480 | ++tempstring; |
| 481 | if (VTBL_PREFIX_P ((tempstring))) |
| 482 | ms_type = mst_data; |
| 483 | } |
| 484 | break; |
| 485 | |
| 486 | case N_BSS: |
| 487 | ms_type = mst_file_bss; |
| 488 | break; |
| 489 | |
| 490 | default: ms_type = mst_unknown; break; |
| 491 | } |
| 492 | |
| 493 | prim_record_minimal_symbol |
| 494 | (obsavestring (name, strlen (name), &objfile -> symbol_obstack), |
| 495 | address, |
| 496 | ms_type); |
| 497 | } |
| 498 | \f |
| 499 | /* Scan and build partial symbols for a symbol file. |
| 500 | We have been initialized by a call to dbx_symfile_init, which |
| 501 | put all the relevant info into a "struct dbx_symfile_info", |
| 502 | hung off the objfile structure. |
| 503 | |
| 504 | SECTION_OFFSETS contains offsets relative to which the symbols in the |
| 505 | various sections are (depending where the sections were actually loaded). |
| 506 | MAINLINE is true if we are reading the main symbol |
| 507 | table (as opposed to a shared lib or dynamically loaded file). */ |
| 508 | |
| 509 | static void |
| 510 | dbx_symfile_read (objfile, section_offsets, mainline) |
| 511 | struct objfile *objfile; |
| 512 | struct section_offsets *section_offsets; |
| 513 | int mainline; /* FIXME comments above */ |
| 514 | { |
| 515 | bfd *sym_bfd; |
| 516 | int val; |
| 517 | struct cleanup *back_to; |
| 518 | |
| 519 | sym_bfd = objfile->obfd; |
| 520 | val = bfd_seek (objfile->obfd, DBX_SYMTAB_OFFSET (objfile), SEEK_SET); |
| 521 | if (val < 0) |
| 522 | perror_with_name (objfile->name); |
| 523 | |
| 524 | /* If we are reinitializing, or if we have never loaded syms yet, init */ |
| 525 | if (mainline || objfile->global_psymbols.size == 0 || objfile->static_psymbols.size == 0) |
| 526 | init_psymbol_list (objfile); |
| 527 | |
| 528 | symbol_size = DBX_SYMBOL_SIZE (objfile); |
| 529 | symbol_table_offset = DBX_SYMTAB_OFFSET (objfile); |
| 530 | |
| 531 | pending_blocks = 0; |
| 532 | back_to = make_cleanup (really_free_pendings, 0); |
| 533 | |
| 534 | init_minimal_symbol_collection (); |
| 535 | make_cleanup (discard_minimal_symbols, 0); |
| 536 | |
| 537 | /* Now that the symbol table data of the executable file are all in core, |
| 538 | process them and define symbols accordingly. */ |
| 539 | |
| 540 | read_dbx_symtab (section_offsets, objfile, |
| 541 | bfd_section_vma (sym_bfd, DBX_TEXT_SECT (objfile)), |
| 542 | bfd_section_size (sym_bfd, DBX_TEXT_SECT (objfile))); |
| 543 | |
| 544 | /* Install any minimal symbols that have been collected as the current |
| 545 | minimal symbols for this objfile. */ |
| 546 | |
| 547 | install_minimal_symbols (objfile); |
| 548 | |
| 549 | if (!have_partial_symbols ()) { |
| 550 | wrap_here (""); |
| 551 | printf_filtered ("(no debugging symbols found)..."); |
| 552 | wrap_here (""); |
| 553 | } |
| 554 | |
| 555 | do_cleanups (back_to); |
| 556 | } |
| 557 | |
| 558 | /* Initialize anything that needs initializing when a completely new |
| 559 | symbol file is specified (not just adding some symbols from another |
| 560 | file, e.g. a shared library). */ |
| 561 | |
| 562 | static void |
| 563 | dbx_new_init (ignore) |
| 564 | struct objfile *ignore; |
| 565 | { |
| 566 | stabsread_new_init (); |
| 567 | buildsym_new_init (); |
| 568 | init_header_files (); |
| 569 | } |
| 570 | |
| 571 | |
| 572 | /* dbx_symfile_init () |
| 573 | is the dbx-specific initialization routine for reading symbols. |
| 574 | It is passed a struct objfile which contains, among other things, |
| 575 | the BFD for the file whose symbols are being read, and a slot for a pointer |
| 576 | to "private data" which we fill with goodies. |
| 577 | |
| 578 | We read the string table into malloc'd space and stash a pointer to it. |
| 579 | |
| 580 | Since BFD doesn't know how to read debug symbols in a format-independent |
| 581 | way (and may never do so...), we have to do it ourselves. We will never |
| 582 | be called unless this is an a.out (or very similar) file. |
| 583 | FIXME, there should be a cleaner peephole into the BFD environment here. */ |
| 584 | |
| 585 | #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */ |
| 586 | |
| 587 | static void |
| 588 | dbx_symfile_init (objfile) |
| 589 | struct objfile *objfile; |
| 590 | { |
| 591 | int val; |
| 592 | bfd *sym_bfd = objfile->obfd; |
| 593 | char *name = bfd_get_filename (sym_bfd); |
| 594 | unsigned char size_temp[DBX_STRINGTAB_SIZE_SIZE]; |
| 595 | |
| 596 | /* Allocate struct to keep track of the symfile */ |
| 597 | objfile->sym_private = (PTR) |
| 598 | xmmalloc (objfile -> md, sizeof (struct dbx_symfile_info)); |
| 599 | |
| 600 | /* FIXME POKING INSIDE BFD DATA STRUCTURES */ |
| 601 | #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd)) |
| 602 | #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd)) |
| 603 | |
| 604 | /* FIXME POKING INSIDE BFD DATA STRUCTURES */ |
| 605 | |
| 606 | DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL; |
| 607 | DBX_TEXT_SECT (objfile) = bfd_get_section_by_name (sym_bfd, ".text"); |
| 608 | if (!DBX_TEXT_SECT (objfile)) |
| 609 | error ("Can't find .text section in symbol file"); |
| 610 | |
| 611 | DBX_SYMBOL_SIZE (objfile) = obj_symbol_entry_size (sym_bfd); |
| 612 | DBX_SYMCOUNT (objfile) = bfd_get_symcount (sym_bfd); |
| 613 | DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET; |
| 614 | |
| 615 | /* Read the string table and stash it away in the psymbol_obstack. It is |
| 616 | only needed as long as we need to expand psymbols into full symbols, |
| 617 | so when we blow away the psymbol the string table goes away as well. |
| 618 | Note that gdb used to use the results of attempting to malloc the |
| 619 | string table, based on the size it read, as a form of sanity check |
| 620 | for botched byte swapping, on the theory that a byte swapped string |
| 621 | table size would be so totally bogus that the malloc would fail. Now |
| 622 | that we put in on the psymbol_obstack, we can't do this since gdb gets |
| 623 | a fatal error (out of virtual memory) if the size is bogus. We can |
| 624 | however at least check to see if the size is less than the size of |
| 625 | the size field itself, or larger than the size of the entire file. |
| 626 | Note that all valid string tables have a size greater than zero, since |
| 627 | the bytes used to hold the size are included in the count. */ |
| 628 | |
| 629 | if (STRING_TABLE_OFFSET == 0) |
| 630 | { |
| 631 | /* It appears that with the existing bfd code, STRING_TABLE_OFFSET |
| 632 | will never be zero, even when there is no string table. This |
| 633 | would appear to be a bug in bfd. */ |
| 634 | DBX_STRINGTAB_SIZE (objfile) = 0; |
| 635 | DBX_STRINGTAB (objfile) = NULL; |
| 636 | } |
| 637 | else |
| 638 | { |
| 639 | val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET); |
| 640 | if (val < 0) |
| 641 | perror_with_name (name); |
| 642 | |
| 643 | memset ((PTR) size_temp, 0, sizeof (size_temp)); |
| 644 | val = bfd_read ((PTR) size_temp, sizeof (size_temp), 1, sym_bfd); |
| 645 | if (val < 0) |
| 646 | { |
| 647 | perror_with_name (name); |
| 648 | } |
| 649 | else if (val == 0) |
| 650 | { |
| 651 | /* With the existing bfd code, STRING_TABLE_OFFSET will be set to |
| 652 | EOF if there is no string table, and attempting to read the size |
| 653 | from EOF will read zero bytes. */ |
| 654 | DBX_STRINGTAB_SIZE (objfile) = 0; |
| 655 | DBX_STRINGTAB (objfile) = NULL; |
| 656 | } |
| 657 | else |
| 658 | { |
| 659 | /* Read some data that would appear to be the string table size. |
| 660 | If there really is a string table, then it is probably the right |
| 661 | size. Byteswap if necessary and validate the size. Note that |
| 662 | the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some |
| 663 | random data that happened to be at STRING_TABLE_OFFSET, because |
| 664 | bfd can't tell us there is no string table, the sanity checks may |
| 665 | or may not catch this. */ |
| 666 | DBX_STRINGTAB_SIZE (objfile) = bfd_h_get_32 (sym_bfd, size_temp); |
| 667 | |
| 668 | if (DBX_STRINGTAB_SIZE (objfile) < sizeof (size_temp) |
| 669 | || DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd)) |
| 670 | error ("ridiculous string table size (%d bytes).", |
| 671 | DBX_STRINGTAB_SIZE (objfile)); |
| 672 | |
| 673 | DBX_STRINGTAB (objfile) = |
| 674 | (char *) obstack_alloc (&objfile -> psymbol_obstack, |
| 675 | DBX_STRINGTAB_SIZE (objfile)); |
| 676 | |
| 677 | /* Now read in the string table in one big gulp. */ |
| 678 | |
| 679 | val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET); |
| 680 | if (val < 0) |
| 681 | perror_with_name (name); |
| 682 | val = bfd_read (DBX_STRINGTAB (objfile), DBX_STRINGTAB_SIZE (objfile), 1, |
| 683 | sym_bfd); |
| 684 | if (val != DBX_STRINGTAB_SIZE (objfile)) |
| 685 | perror_with_name (name); |
| 686 | } |
| 687 | } |
| 688 | } |
| 689 | |
| 690 | /* Perform any local cleanups required when we are done with a particular |
| 691 | objfile. I.E, we are in the process of discarding all symbol information |
| 692 | for an objfile, freeing up all memory held for it, and unlinking the |
| 693 | objfile struct from the global list of known objfiles. */ |
| 694 | |
| 695 | static void |
| 696 | dbx_symfile_finish (objfile) |
| 697 | struct objfile *objfile; |
| 698 | { |
| 699 | if (objfile->sym_private != NULL) |
| 700 | { |
| 701 | mfree (objfile -> md, objfile->sym_private); |
| 702 | } |
| 703 | free_header_files (); |
| 704 | } |
| 705 | |
| 706 | \f |
| 707 | /* Buffer for reading the symbol table entries. */ |
| 708 | static struct internal_nlist symbuf[4096]; |
| 709 | static int symbuf_idx; |
| 710 | static int symbuf_end; |
| 711 | |
| 712 | /* Name of last function encountered. Used in Solaris to approximate |
| 713 | object file boundaries. */ |
| 714 | static char *last_function_name; |
| 715 | |
| 716 | /* The address in memory of the string table of the object file we are |
| 717 | reading (which might not be the "main" object file, but might be a |
| 718 | shared library or some other dynamically loaded thing). This is set |
| 719 | by read_dbx_symtab when building psymtabs, and by read_ofile_symtab |
| 720 | when building symtabs, and is used only by next_symbol_text. */ |
| 721 | static char *stringtab_global; |
| 722 | |
| 723 | /* Refill the symbol table input buffer |
| 724 | and set the variables that control fetching entries from it. |
| 725 | Reports an error if no data available. |
| 726 | This function can read past the end of the symbol table |
| 727 | (into the string table) but this does no harm. */ |
| 728 | |
| 729 | static void |
| 730 | fill_symbuf (sym_bfd) |
| 731 | bfd *sym_bfd; |
| 732 | { |
| 733 | int nbytes = bfd_read ((PTR)symbuf, sizeof (symbuf), 1, sym_bfd); |
| 734 | if (nbytes < 0) |
| 735 | perror_with_name (bfd_get_filename (sym_bfd)); |
| 736 | else if (nbytes == 0) |
| 737 | error ("Premature end of file reading symbol table"); |
| 738 | symbuf_end = nbytes / symbol_size; |
| 739 | symbuf_idx = 0; |
| 740 | } |
| 741 | |
| 742 | #define SWAP_SYMBOL(symp, abfd) \ |
| 743 | { \ |
| 744 | (symp)->n_strx = bfd_h_get_32(abfd, \ |
| 745 | (unsigned char *)&(symp)->n_strx); \ |
| 746 | (symp)->n_desc = bfd_h_get_16 (abfd, \ |
| 747 | (unsigned char *)&(symp)->n_desc); \ |
| 748 | (symp)->n_value = bfd_h_get_32 (abfd, \ |
| 749 | (unsigned char *)&(symp)->n_value); \ |
| 750 | } |
| 751 | |
| 752 | /* Invariant: The symbol pointed to by symbuf_idx is the first one |
| 753 | that hasn't been swapped. Swap the symbol at the same time |
| 754 | that symbuf_idx is incremented. */ |
| 755 | |
| 756 | /* dbx allows the text of a symbol name to be continued into the |
| 757 | next symbol name! When such a continuation is encountered |
| 758 | (a \ at the end of the text of a name) |
| 759 | call this function to get the continuation. */ |
| 760 | |
| 761 | static char * |
| 762 | dbx_next_symbol_text () |
| 763 | { |
| 764 | if (symbuf_idx == symbuf_end) |
| 765 | fill_symbuf (symfile_bfd); |
| 766 | symnum++; |
| 767 | SWAP_SYMBOL(&symbuf[symbuf_idx], symfile_bfd); |
| 768 | return symbuf[symbuf_idx++].n_strx + stringtab_global |
| 769 | + file_string_table_offset; |
| 770 | } |
| 771 | \f |
| 772 | /* Initializes storage for all of the partial symbols that will be |
| 773 | created by read_dbx_symtab and subsidiaries. */ |
| 774 | |
| 775 | static void |
| 776 | init_psymbol_list (objfile) |
| 777 | struct objfile *objfile; |
| 778 | { |
| 779 | /* Free any previously allocated psymbol lists. */ |
| 780 | if (objfile -> global_psymbols.list) |
| 781 | mfree (objfile -> md, (PTR)objfile -> global_psymbols.list); |
| 782 | if (objfile -> static_psymbols.list) |
| 783 | mfree (objfile -> md, (PTR)objfile -> static_psymbols.list); |
| 784 | |
| 785 | /* Current best guess is that there are approximately a twentieth |
| 786 | of the total symbols (in a debugging file) are global or static |
| 787 | oriented symbols */ |
| 788 | objfile -> global_psymbols.size = DBX_SYMCOUNT (objfile) / 10; |
| 789 | objfile -> static_psymbols.size = DBX_SYMCOUNT (objfile) / 10; |
| 790 | objfile -> global_psymbols.next = objfile -> global_psymbols.list = (struct partial_symbol *) |
| 791 | xmmalloc (objfile -> md, objfile -> global_psymbols.size * sizeof (struct partial_symbol)); |
| 792 | objfile -> static_psymbols.next = objfile -> static_psymbols.list = (struct partial_symbol *) |
| 793 | xmmalloc (objfile -> md, objfile -> static_psymbols.size * sizeof (struct partial_symbol)); |
| 794 | } |
| 795 | |
| 796 | /* Initialize the list of bincls to contain none and have some |
| 797 | allocated. */ |
| 798 | |
| 799 | static void |
| 800 | init_bincl_list (number, objfile) |
| 801 | int number; |
| 802 | struct objfile *objfile; |
| 803 | { |
| 804 | bincls_allocated = number; |
| 805 | next_bincl = bincl_list = (struct header_file_location *) |
| 806 | xmmalloc (objfile -> md, bincls_allocated * sizeof(struct header_file_location)); |
| 807 | } |
| 808 | |
| 809 | /* Add a bincl to the list. */ |
| 810 | |
| 811 | static void |
| 812 | add_bincl_to_list (pst, name, instance) |
| 813 | struct partial_symtab *pst; |
| 814 | char *name; |
| 815 | int instance; |
| 816 | { |
| 817 | if (next_bincl >= bincl_list + bincls_allocated) |
| 818 | { |
| 819 | int offset = next_bincl - bincl_list; |
| 820 | bincls_allocated *= 2; |
| 821 | bincl_list = (struct header_file_location *) |
| 822 | xmrealloc (pst->objfile->md, (char *)bincl_list, |
| 823 | bincls_allocated * sizeof (struct header_file_location)); |
| 824 | next_bincl = bincl_list + offset; |
| 825 | } |
| 826 | next_bincl->pst = pst; |
| 827 | next_bincl->instance = instance; |
| 828 | next_bincl++->name = name; |
| 829 | } |
| 830 | |
| 831 | /* Given a name, value pair, find the corresponding |
| 832 | bincl in the list. Return the partial symtab associated |
| 833 | with that header_file_location. */ |
| 834 | |
| 835 | static struct partial_symtab * |
| 836 | find_corresponding_bincl_psymtab (name, instance) |
| 837 | char *name; |
| 838 | int instance; |
| 839 | { |
| 840 | struct header_file_location *bincl; |
| 841 | |
| 842 | for (bincl = bincl_list; bincl < next_bincl; bincl++) |
| 843 | if (bincl->instance == instance |
| 844 | && STREQ (name, bincl->name)) |
| 845 | return bincl->pst; |
| 846 | |
| 847 | return (struct partial_symtab *) 0; |
| 848 | } |
| 849 | |
| 850 | /* Free the storage allocated for the bincl list. */ |
| 851 | |
| 852 | static void |
| 853 | free_bincl_list (objfile) |
| 854 | struct objfile *objfile; |
| 855 | { |
| 856 | mfree (objfile -> md, (PTR)bincl_list); |
| 857 | bincls_allocated = 0; |
| 858 | } |
| 859 | |
| 860 | /* Given pointers to an a.out symbol table in core containing dbx |
| 861 | style data, setup partial_symtab's describing each source file for |
| 862 | which debugging information is available. |
| 863 | SYMFILE_NAME is the name of the file we are reading from |
| 864 | and SECTION_OFFSETS is the set of offsets for the various sections |
| 865 | of the file (a set of zeros if the mainline program). */ |
| 866 | |
| 867 | static void |
| 868 | read_dbx_symtab (section_offsets, objfile, text_addr, text_size) |
| 869 | struct section_offsets *section_offsets; |
| 870 | struct objfile *objfile; |
| 871 | CORE_ADDR text_addr; |
| 872 | int text_size; |
| 873 | { |
| 874 | register struct internal_nlist *bufp = 0; /* =0 avoids gcc -Wall glitch */ |
| 875 | register char *namestring; |
| 876 | int nsl; |
| 877 | int past_first_source_file = 0; |
| 878 | CORE_ADDR last_o_file_start = 0; |
| 879 | struct cleanup *back_to; |
| 880 | bfd *abfd; |
| 881 | |
| 882 | /* End of the text segment of the executable file. */ |
| 883 | CORE_ADDR end_of_text_addr; |
| 884 | |
| 885 | /* Current partial symtab */ |
| 886 | struct partial_symtab *pst; |
| 887 | |
| 888 | /* List of current psymtab's include files */ |
| 889 | char **psymtab_include_list; |
| 890 | int includes_allocated; |
| 891 | int includes_used; |
| 892 | |
| 893 | /* Index within current psymtab dependency list */ |
| 894 | struct partial_symtab **dependency_list; |
| 895 | int dependencies_used, dependencies_allocated; |
| 896 | |
| 897 | /* FIXME. We probably want to change stringtab_global rather than add this |
| 898 | while processing every symbol entry. FIXME. */ |
| 899 | file_string_table_offset = 0; |
| 900 | next_file_string_table_offset = 0; |
| 901 | |
| 902 | stringtab_global = DBX_STRINGTAB (objfile); |
| 903 | |
| 904 | pst = (struct partial_symtab *) 0; |
| 905 | |
| 906 | includes_allocated = 30; |
| 907 | includes_used = 0; |
| 908 | psymtab_include_list = (char **) alloca (includes_allocated * |
| 909 | sizeof (char *)); |
| 910 | |
| 911 | dependencies_allocated = 30; |
| 912 | dependencies_used = 0; |
| 913 | dependency_list = |
| 914 | (struct partial_symtab **) alloca (dependencies_allocated * |
| 915 | sizeof (struct partial_symtab *)); |
| 916 | |
| 917 | /* Init bincl list */ |
| 918 | init_bincl_list (20, objfile); |
| 919 | back_to = make_cleanup (free_bincl_list, objfile); |
| 920 | |
| 921 | last_source_file = NULL; |
| 922 | |
| 923 | #ifdef END_OF_TEXT_DEFAULT |
| 924 | end_of_text_addr = END_OF_TEXT_DEFAULT; |
| 925 | #else |
| 926 | end_of_text_addr = text_addr + section_offsets->offsets[SECT_OFF_TEXT] |
| 927 | + text_size; /* Relocate */ |
| 928 | #endif |
| 929 | |
| 930 | symfile_bfd = objfile->obfd; /* For next_text_symbol */ |
| 931 | abfd = objfile->obfd; |
| 932 | symbuf_end = symbuf_idx = 0; |
| 933 | next_symbol_text_func = dbx_next_symbol_text; |
| 934 | |
| 935 | for (symnum = 0; symnum < DBX_SYMCOUNT (objfile); symnum++) |
| 936 | { |
| 937 | /* Get the symbol for this run and pull out some info */ |
| 938 | QUIT; /* allow this to be interruptable */ |
| 939 | if (symbuf_idx == symbuf_end) |
| 940 | fill_symbuf (abfd); |
| 941 | bufp = &symbuf[symbuf_idx++]; |
| 942 | |
| 943 | /* |
| 944 | * Special case to speed up readin. |
| 945 | */ |
| 946 | if (bufp->n_type == (unsigned char)N_SLINE) continue; |
| 947 | |
| 948 | SWAP_SYMBOL (bufp, abfd); |
| 949 | |
| 950 | /* Ok. There is a lot of code duplicated in the rest of this |
| 951 | switch statement (for efficiency reasons). Since I don't |
| 952 | like duplicating code, I will do my penance here, and |
| 953 | describe the code which is duplicated: |
| 954 | |
| 955 | *) The assignment to namestring. |
| 956 | *) The call to strchr. |
| 957 | *) The addition of a partial symbol the the two partial |
| 958 | symbol lists. This last is a large section of code, so |
| 959 | I've imbedded it in the following macro. |
| 960 | */ |
| 961 | |
| 962 | /* Set namestring based on bufp. If the string table index is invalid, |
| 963 | give a fake name, and print a single error message per symbol file read, |
| 964 | rather than abort the symbol reading or flood the user with messages. */ |
| 965 | |
| 966 | /*FIXME: Too many adds and indirections in here for the inner loop. */ |
| 967 | #define SET_NAMESTRING()\ |
| 968 | if (((unsigned)bufp->n_strx + file_string_table_offset) >= \ |
| 969 | DBX_STRINGTAB_SIZE (objfile)) { \ |
| 970 | complain (&string_table_offset_complaint, symnum); \ |
| 971 | namestring = "foo"; \ |
| 972 | } else \ |
| 973 | namestring = bufp->n_strx + file_string_table_offset + \ |
| 974 | DBX_STRINGTAB (objfile) |
| 975 | |
| 976 | #define CUR_SYMBOL_TYPE bufp->n_type |
| 977 | #define CUR_SYMBOL_VALUE bufp->n_value |
| 978 | #define DBXREAD_ONLY |
| 979 | #define START_PSYMTAB(ofile,secoff,fname,low,symoff,global_syms,static_syms)\ |
| 980 | start_psymtab(ofile, secoff, fname, low, symoff, global_syms, static_syms) |
| 981 | #define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps)\ |
| 982 | end_psymtab(pst,ilist,ninc,c_off,c_text,dep_list,n_deps) |
| 983 | |
| 984 | #include "partial-stab.h" |
| 985 | } |
| 986 | |
| 987 | /* If there's stuff to be cleaned up, clean it up. */ |
| 988 | if (DBX_SYMCOUNT (objfile) > 0 /* We have some syms */ |
| 989 | /*FIXME, does this have a bug at start address 0? */ |
| 990 | && last_o_file_start |
| 991 | && objfile -> ei.entry_point < bufp->n_value |
| 992 | && objfile -> ei.entry_point >= last_o_file_start) |
| 993 | { |
| 994 | objfile -> ei.entry_file_lowpc = last_o_file_start; |
| 995 | objfile -> ei.entry_file_highpc = bufp->n_value; |
| 996 | } |
| 997 | |
| 998 | if (pst) |
| 999 | { |
| 1000 | end_psymtab (pst, psymtab_include_list, includes_used, |
| 1001 | symnum * symbol_size, end_of_text_addr, |
| 1002 | dependency_list, dependencies_used); |
| 1003 | } |
| 1004 | |
| 1005 | do_cleanups (back_to); |
| 1006 | } |
| 1007 | |
| 1008 | /* Allocate and partially fill a partial symtab. It will be |
| 1009 | completely filled at the end of the symbol list. |
| 1010 | |
| 1011 | SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR |
| 1012 | is the address relative to which its symbols are (incremental) or 0 |
| 1013 | (normal). */ |
| 1014 | |
| 1015 | |
| 1016 | struct partial_symtab * |
| 1017 | start_psymtab (objfile, section_offsets, |
| 1018 | filename, textlow, ldsymoff, global_syms, static_syms) |
| 1019 | struct objfile *objfile; |
| 1020 | struct section_offsets *section_offsets; |
| 1021 | char *filename; |
| 1022 | CORE_ADDR textlow; |
| 1023 | int ldsymoff; |
| 1024 | struct partial_symbol *global_syms; |
| 1025 | struct partial_symbol *static_syms; |
| 1026 | { |
| 1027 | struct partial_symtab *result = |
| 1028 | start_psymtab_common(objfile, section_offsets, |
| 1029 | filename, textlow, global_syms, static_syms); |
| 1030 | |
| 1031 | result->read_symtab_private = (char *) |
| 1032 | obstack_alloc (&objfile -> psymbol_obstack, sizeof (struct symloc)); |
| 1033 | LDSYMOFF(result) = ldsymoff; |
| 1034 | result->read_symtab = dbx_psymtab_to_symtab; |
| 1035 | SYMBOL_SIZE(result) = symbol_size; |
| 1036 | SYMBOL_OFFSET(result) = symbol_table_offset; |
| 1037 | STRING_OFFSET(result) = string_table_offset; |
| 1038 | FILE_STRING_OFFSET(result) = file_string_table_offset; |
| 1039 | |
| 1040 | /* If we're handling an ELF file, drag some section-relocation info |
| 1041 | for this source file out of the ELF symbol table, to compensate for |
| 1042 | Sun brain death. This replaces the section_offsets in this psymtab, |
| 1043 | if successful. */ |
| 1044 | elfstab_offset_sections (objfile, result); |
| 1045 | |
| 1046 | /* Deduce the source language from the filename for this psymtab. */ |
| 1047 | psymtab_language = deduce_language_from_filename (filename); |
| 1048 | |
| 1049 | return result; |
| 1050 | } |
| 1051 | |
| 1052 | /* Close off the current usage of PST. |
| 1053 | Returns PST or NULL if the partial symtab was empty and thrown away. |
| 1054 | |
| 1055 | FIXME: List variables and peculiarities of same. */ |
| 1056 | |
| 1057 | struct partial_symtab * |
| 1058 | end_psymtab (pst, include_list, num_includes, capping_symbol_offset, |
| 1059 | capping_text, dependency_list, number_dependencies) |
| 1060 | struct partial_symtab *pst; |
| 1061 | char **include_list; |
| 1062 | int num_includes; |
| 1063 | int capping_symbol_offset; |
| 1064 | CORE_ADDR capping_text; |
| 1065 | struct partial_symtab **dependency_list; |
| 1066 | int number_dependencies; |
| 1067 | /* struct partial_symbol *capping_global, *capping_static;*/ |
| 1068 | { |
| 1069 | int i; |
| 1070 | struct partial_symtab *p1; |
| 1071 | struct objfile *objfile = pst -> objfile; |
| 1072 | |
| 1073 | if (capping_symbol_offset != -1) |
| 1074 | LDSYMLEN(pst) = capping_symbol_offset - LDSYMOFF(pst); |
| 1075 | pst->texthigh = capping_text; |
| 1076 | |
| 1077 | /* Under Solaris, the N_SO symbols always have a value of 0, |
| 1078 | instead of the usual address of the .o file. Therefore, |
| 1079 | we have to do some tricks to fill in texthigh and textlow. |
| 1080 | The first trick is in partial-stab.h: if we see a static |
| 1081 | or global function, and the textlow for the current pst |
| 1082 | is still 0, then we use that function's address for |
| 1083 | the textlow of the pst. |
| 1084 | |
| 1085 | Now, to fill in texthigh, we remember the last function seen |
| 1086 | in the .o file (also in partial-stab.h). Also, there's a hack in |
| 1087 | bfd/elf.c and gdb/elfread.c to pass the ELF st_size field |
| 1088 | to here via the misc_info field. Therefore, we can fill in |
| 1089 | a reliable texthigh by taking the address plus size of the |
| 1090 | last function in the file. |
| 1091 | |
| 1092 | Unfortunately, that does not cover the case where the last function |
| 1093 | in the file is static. See the paragraph below for more comments |
| 1094 | on this situation. |
| 1095 | |
| 1096 | Finally, if we have a valid textlow for the current file, we run |
| 1097 | down the partial_symtab_list filling in previous texthighs that |
| 1098 | are still unknown. */ |
| 1099 | |
| 1100 | if (pst->texthigh == 0 && last_function_name) { |
| 1101 | char *p; |
| 1102 | int n; |
| 1103 | struct minimal_symbol *minsym; |
| 1104 | |
| 1105 | p = strchr (last_function_name, ':'); |
| 1106 | if (p == NULL) |
| 1107 | p = last_function_name; |
| 1108 | n = p - last_function_name; |
| 1109 | p = alloca (n + 1); |
| 1110 | strncpy (p, last_function_name, n); |
| 1111 | p[n] = 0; |
| 1112 | |
| 1113 | minsym = lookup_minimal_symbol (p, objfile); |
| 1114 | |
| 1115 | if (minsym) { |
| 1116 | pst->texthigh = SYMBOL_VALUE_ADDRESS (minsym) + |
| 1117 | (int) MSYMBOL_INFO (minsym); |
| 1118 | } else { |
| 1119 | /* This file ends with a static function, and it's |
| 1120 | difficult to imagine how hard it would be to track down |
| 1121 | the elf symbol. Luckily, most of the time no one will notice, |
| 1122 | since the next file will likely be compiled with -g, so |
| 1123 | the code below will copy the first fuction's start address |
| 1124 | back to our texthigh variable. (Also, if this file is the |
| 1125 | last one in a dynamically linked program, texthigh already |
| 1126 | has the right value.) If the next file isn't compiled |
| 1127 | with -g, then the last function in this file winds up owning |
| 1128 | all of the text space up to the next -g file, or the end (minus |
| 1129 | shared libraries). This only matters for single stepping, |
| 1130 | and even then it will still work, except that it will single |
| 1131 | step through all of the covered functions, instead of setting |
| 1132 | breakpoints around them as it usualy does. This makes it |
| 1133 | pretty slow, but at least it doesn't fail. |
| 1134 | |
| 1135 | We can fix this with a fairly big change to bfd, but we need |
| 1136 | to coordinate better with Cygnus if we want to do that. FIXME. */ |
| 1137 | } |
| 1138 | last_function_name = NULL; |
| 1139 | } |
| 1140 | |
| 1141 | /* this test will be true if the last .o file is only data */ |
| 1142 | if (pst->textlow == 0) |
| 1143 | pst->textlow = pst->texthigh; |
| 1144 | |
| 1145 | /* If we know our own starting text address, then walk through all other |
| 1146 | psymtabs for this objfile, and if any didn't know their ending text |
| 1147 | address, set it to our starting address. Take care to not set our |
| 1148 | own ending address to our starting address, nor to set addresses on |
| 1149 | `dependency' files that have both textlow and texthigh zero. */ |
| 1150 | if (pst->textlow) { |
| 1151 | ALL_OBJFILE_PSYMTABS (objfile, p1) { |
| 1152 | if (p1->texthigh == 0 && p1->textlow != 0 && p1 != pst) { |
| 1153 | p1->texthigh = pst->textlow; |
| 1154 | /* if this file has only data, then make textlow match texthigh */ |
| 1155 | if (p1->textlow == 0) |
| 1156 | p1->textlow = p1->texthigh; |
| 1157 | } |
| 1158 | } |
| 1159 | } |
| 1160 | |
| 1161 | /* End of kludge for patching Solaris textlow and texthigh. */ |
| 1162 | |
| 1163 | |
| 1164 | pst->n_global_syms = |
| 1165 | objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset); |
| 1166 | pst->n_static_syms = |
| 1167 | objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset); |
| 1168 | |
| 1169 | pst->number_of_dependencies = number_dependencies; |
| 1170 | if (number_dependencies) |
| 1171 | { |
| 1172 | pst->dependencies = (struct partial_symtab **) |
| 1173 | obstack_alloc (&objfile->psymbol_obstack, |
| 1174 | number_dependencies * sizeof (struct partial_symtab *)); |
| 1175 | memcpy (pst->dependencies, dependency_list, |
| 1176 | number_dependencies * sizeof (struct partial_symtab *)); |
| 1177 | } |
| 1178 | else |
| 1179 | pst->dependencies = 0; |
| 1180 | |
| 1181 | for (i = 0; i < num_includes; i++) |
| 1182 | { |
| 1183 | struct partial_symtab *subpst = |
| 1184 | allocate_psymtab (include_list[i], objfile); |
| 1185 | |
| 1186 | subpst->section_offsets = pst->section_offsets; |
| 1187 | subpst->read_symtab_private = |
| 1188 | (char *) obstack_alloc (&objfile->psymbol_obstack, |
| 1189 | sizeof (struct symloc)); |
| 1190 | LDSYMOFF(subpst) = |
| 1191 | LDSYMLEN(subpst) = |
| 1192 | subpst->textlow = |
| 1193 | subpst->texthigh = 0; |
| 1194 | |
| 1195 | /* We could save slight bits of space by only making one of these, |
| 1196 | shared by the entire set of include files. FIXME-someday. */ |
| 1197 | subpst->dependencies = (struct partial_symtab **) |
| 1198 | obstack_alloc (&objfile->psymbol_obstack, |
| 1199 | sizeof (struct partial_symtab *)); |
| 1200 | subpst->dependencies[0] = pst; |
| 1201 | subpst->number_of_dependencies = 1; |
| 1202 | |
| 1203 | subpst->globals_offset = |
| 1204 | subpst->n_global_syms = |
| 1205 | subpst->statics_offset = |
| 1206 | subpst->n_static_syms = 0; |
| 1207 | |
| 1208 | subpst->readin = 0; |
| 1209 | subpst->symtab = 0; |
| 1210 | subpst->read_symtab = pst->read_symtab; |
| 1211 | } |
| 1212 | |
| 1213 | sort_pst_symbols (pst); |
| 1214 | |
| 1215 | /* If there is already a psymtab or symtab for a file of this name, remove it. |
| 1216 | (If there is a symtab, more drastic things also happen.) |
| 1217 | This happens in VxWorks. */ |
| 1218 | free_named_symtabs (pst->filename); |
| 1219 | |
| 1220 | if (num_includes == 0 |
| 1221 | && number_dependencies == 0 |
| 1222 | && pst->n_global_syms == 0 |
| 1223 | && pst->n_static_syms == 0) { |
| 1224 | /* Throw away this psymtab, it's empty. We can't deallocate it, since |
| 1225 | it is on the obstack, but we can forget to chain it on the list. */ |
| 1226 | struct partial_symtab *prev_pst; |
| 1227 | |
| 1228 | /* First, snip it out of the psymtab chain */ |
| 1229 | |
| 1230 | if (pst->objfile->psymtabs == pst) |
| 1231 | pst->objfile->psymtabs = pst->next; |
| 1232 | else |
| 1233 | for (prev_pst = pst->objfile->psymtabs; prev_pst; prev_pst = pst->next) |
| 1234 | if (prev_pst->next == pst) |
| 1235 | prev_pst->next = pst->next; |
| 1236 | |
| 1237 | /* Next, put it on a free list for recycling */ |
| 1238 | |
| 1239 | pst->next = pst->objfile->free_psymtabs; |
| 1240 | pst->objfile->free_psymtabs = pst; |
| 1241 | |
| 1242 | /* Indicate that psymtab was thrown away. */ |
| 1243 | pst = (struct partial_symtab *)NULL; |
| 1244 | } |
| 1245 | return pst; |
| 1246 | } |
| 1247 | \f |
| 1248 | static void |
| 1249 | dbx_psymtab_to_symtab_1 (pst) |
| 1250 | struct partial_symtab *pst; |
| 1251 | { |
| 1252 | struct cleanup *old_chain; |
| 1253 | int i; |
| 1254 | |
| 1255 | if (!pst) |
| 1256 | return; |
| 1257 | |
| 1258 | if (pst->readin) |
| 1259 | { |
| 1260 | fprintf (stderr, "Psymtab for %s already read in. Shouldn't happen.\n", |
| 1261 | pst->filename); |
| 1262 | return; |
| 1263 | } |
| 1264 | |
| 1265 | /* Read in all partial symtabs on which this one is dependent */ |
| 1266 | for (i = 0; i < pst->number_of_dependencies; i++) |
| 1267 | if (!pst->dependencies[i]->readin) |
| 1268 | { |
| 1269 | /* Inform about additional files that need to be read in. */ |
| 1270 | if (info_verbose) |
| 1271 | { |
| 1272 | fputs_filtered (" ", stdout); |
| 1273 | wrap_here (""); |
| 1274 | fputs_filtered ("and ", stdout); |
| 1275 | wrap_here (""); |
| 1276 | printf_filtered ("%s...", pst->dependencies[i]->filename); |
| 1277 | wrap_here (""); /* Flush output */ |
| 1278 | fflush (stdout); |
| 1279 | } |
| 1280 | dbx_psymtab_to_symtab_1 (pst->dependencies[i]); |
| 1281 | } |
| 1282 | |
| 1283 | if (LDSYMLEN(pst)) /* Otherwise it's a dummy */ |
| 1284 | { |
| 1285 | /* Init stuff necessary for reading in symbols */ |
| 1286 | stabsread_init (); |
| 1287 | buildsym_init (); |
| 1288 | old_chain = make_cleanup (really_free_pendings, 0); |
| 1289 | file_string_table_offset = FILE_STRING_OFFSET (pst); |
| 1290 | symbol_size = SYMBOL_SIZE (pst); |
| 1291 | |
| 1292 | /* Read in this file's symbols */ |
| 1293 | bfd_seek (pst->objfile->obfd, SYMBOL_OFFSET (pst), SEEK_SET); |
| 1294 | read_ofile_symtab (pst); |
| 1295 | sort_symtab_syms (pst->symtab); |
| 1296 | |
| 1297 | do_cleanups (old_chain); |
| 1298 | } |
| 1299 | |
| 1300 | pst->readin = 1; |
| 1301 | } |
| 1302 | |
| 1303 | /* Read in all of the symbols for a given psymtab for real. |
| 1304 | Be verbose about it if the user wants that. */ |
| 1305 | |
| 1306 | static void |
| 1307 | dbx_psymtab_to_symtab (pst) |
| 1308 | struct partial_symtab *pst; |
| 1309 | { |
| 1310 | bfd *sym_bfd; |
| 1311 | |
| 1312 | if (!pst) |
| 1313 | return; |
| 1314 | |
| 1315 | if (pst->readin) |
| 1316 | { |
| 1317 | fprintf (stderr, "Psymtab for %s already read in. Shouldn't happen.\n", |
| 1318 | pst->filename); |
| 1319 | return; |
| 1320 | } |
| 1321 | |
| 1322 | if (LDSYMLEN(pst) || pst->number_of_dependencies) |
| 1323 | { |
| 1324 | /* Print the message now, before reading the string table, |
| 1325 | to avoid disconcerting pauses. */ |
| 1326 | if (info_verbose) |
| 1327 | { |
| 1328 | printf_filtered ("Reading in symbols for %s...", pst->filename); |
| 1329 | fflush (stdout); |
| 1330 | } |
| 1331 | |
| 1332 | sym_bfd = pst->objfile->obfd; |
| 1333 | |
| 1334 | next_symbol_text_func = dbx_next_symbol_text; |
| 1335 | |
| 1336 | dbx_psymtab_to_symtab_1 (pst); |
| 1337 | |
| 1338 | /* Match with global symbols. This only needs to be done once, |
| 1339 | after all of the symtabs and dependencies have been read in. */ |
| 1340 | scan_file_globals (pst->objfile); |
| 1341 | |
| 1342 | /* Finish up the debug error message. */ |
| 1343 | if (info_verbose) |
| 1344 | printf_filtered ("done.\n"); |
| 1345 | } |
| 1346 | } |
| 1347 | |
| 1348 | /* Read in a defined section of a specific object file's symbols. */ |
| 1349 | |
| 1350 | static void |
| 1351 | read_ofile_symtab (pst) |
| 1352 | struct partial_symtab *pst; |
| 1353 | { |
| 1354 | register char *namestring; |
| 1355 | register struct internal_nlist *bufp; |
| 1356 | unsigned char type; |
| 1357 | unsigned max_symnum; |
| 1358 | register bfd *abfd; |
| 1359 | struct objfile *objfile; |
| 1360 | int sym_offset; /* Offset to start of symbols to read */ |
| 1361 | int sym_size; /* Size of symbols to read */ |
| 1362 | CORE_ADDR text_offset; /* Start of text segment for symbols */ |
| 1363 | int text_size; /* Size of text segment for symbols */ |
| 1364 | struct section_offsets *section_offsets; |
| 1365 | |
| 1366 | objfile = pst->objfile; |
| 1367 | sym_offset = LDSYMOFF(pst); |
| 1368 | sym_size = LDSYMLEN(pst); |
| 1369 | text_offset = pst->textlow; |
| 1370 | text_size = pst->texthigh - pst->textlow; |
| 1371 | section_offsets = pst->section_offsets; |
| 1372 | |
| 1373 | current_objfile = objfile; |
| 1374 | subfile_stack = NULL; |
| 1375 | |
| 1376 | stringtab_global = DBX_STRINGTAB (objfile); |
| 1377 | last_source_file = NULL; |
| 1378 | |
| 1379 | abfd = objfile->obfd; |
| 1380 | symfile_bfd = objfile->obfd; /* Implicit param to next_text_symbol */ |
| 1381 | symbuf_end = symbuf_idx = 0; |
| 1382 | |
| 1383 | /* It is necessary to actually read one symbol *before* the start |
| 1384 | of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL |
| 1385 | occurs before the N_SO symbol. |
| 1386 | |
| 1387 | Detecting this in read_dbx_symtab |
| 1388 | would slow down initial readin, so we look for it here instead. */ |
| 1389 | if (!processing_acc_compilation && sym_offset >= (int)symbol_size) |
| 1390 | { |
| 1391 | bfd_seek (symfile_bfd, sym_offset - symbol_size, SEEK_CUR); |
| 1392 | fill_symbuf (abfd); |
| 1393 | bufp = &symbuf[symbuf_idx++]; |
| 1394 | SWAP_SYMBOL (bufp, abfd); |
| 1395 | |
| 1396 | SET_NAMESTRING (); |
| 1397 | |
| 1398 | processing_gcc_compilation = 0; |
| 1399 | if (bufp->n_type == N_TEXT) |
| 1400 | { |
| 1401 | if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL)) |
| 1402 | processing_gcc_compilation = 1; |
| 1403 | else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL)) |
| 1404 | processing_gcc_compilation = 2; |
| 1405 | } |
| 1406 | |
| 1407 | /* Try to select a C++ demangling based on the compilation unit |
| 1408 | producer. */ |
| 1409 | |
| 1410 | if (processing_gcc_compilation) |
| 1411 | { |
| 1412 | if (AUTO_DEMANGLING) |
| 1413 | { |
| 1414 | set_demangling_style (GNU_DEMANGLING_STYLE_STRING); |
| 1415 | } |
| 1416 | } |
| 1417 | } |
| 1418 | else |
| 1419 | { |
| 1420 | /* The N_SO starting this symtab is the first symbol, so we |
| 1421 | better not check the symbol before it. I'm not this can |
| 1422 | happen, but it doesn't hurt to check for it. */ |
| 1423 | bfd_seek (symfile_bfd, sym_offset, SEEK_CUR); |
| 1424 | processing_gcc_compilation = 0; |
| 1425 | } |
| 1426 | |
| 1427 | if (symbuf_idx == symbuf_end) |
| 1428 | fill_symbuf (abfd); |
| 1429 | bufp = &symbuf[symbuf_idx]; |
| 1430 | if (bufp->n_type != (unsigned char)N_SO) |
| 1431 | error("First symbol in segment of executable not a source symbol"); |
| 1432 | |
| 1433 | max_symnum = sym_size / symbol_size; |
| 1434 | |
| 1435 | for (symnum = 0; |
| 1436 | symnum < max_symnum; |
| 1437 | symnum++) |
| 1438 | { |
| 1439 | QUIT; /* Allow this to be interruptable */ |
| 1440 | if (symbuf_idx == symbuf_end) |
| 1441 | fill_symbuf(abfd); |
| 1442 | bufp = &symbuf[symbuf_idx++]; |
| 1443 | SWAP_SYMBOL (bufp, abfd); |
| 1444 | |
| 1445 | type = bufp->n_type; |
| 1446 | |
| 1447 | SET_NAMESTRING (); |
| 1448 | |
| 1449 | if (type & N_STAB) { |
| 1450 | process_one_symbol (type, bufp->n_desc, bufp->n_value, |
| 1451 | namestring, section_offsets, objfile); |
| 1452 | } |
| 1453 | /* We skip checking for a new .o or -l file; that should never |
| 1454 | happen in this routine. */ |
| 1455 | else if (type == N_TEXT) |
| 1456 | { |
| 1457 | /* I don't think this code will ever be executed, because |
| 1458 | the GCC_COMPILED_FLAG_SYMBOL usually is right before |
| 1459 | the N_SO symbol which starts this source file. |
| 1460 | However, there is no reason not to accept |
| 1461 | the GCC_COMPILED_FLAG_SYMBOL anywhere. */ |
| 1462 | |
| 1463 | if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL)) |
| 1464 | processing_gcc_compilation = 1; |
| 1465 | else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL)) |
| 1466 | processing_gcc_compilation = 2; |
| 1467 | |
| 1468 | if (AUTO_DEMANGLING) |
| 1469 | { |
| 1470 | set_demangling_style (GNU_DEMANGLING_STYLE_STRING); |
| 1471 | } |
| 1472 | } |
| 1473 | else if (type & N_EXT || type == (unsigned char)N_TEXT |
| 1474 | || type == (unsigned char)N_NBTEXT |
| 1475 | ) { |
| 1476 | /* Global symbol: see if we came across a dbx defintion for |
| 1477 | a corresponding symbol. If so, store the value. Remove |
| 1478 | syms from the chain when their values are stored, but |
| 1479 | search the whole chain, as there may be several syms from |
| 1480 | different files with the same name. */ |
| 1481 | /* This is probably not true. Since the files will be read |
| 1482 | in one at a time, each reference to a global symbol will |
| 1483 | be satisfied in each file as it appears. So we skip this |
| 1484 | section. */ |
| 1485 | ; |
| 1486 | } |
| 1487 | } |
| 1488 | |
| 1489 | current_objfile = NULL; |
| 1490 | |
| 1491 | /* In a Solaris elf file, this variable, which comes from the |
| 1492 | value of the N_SO symbol, will still be 0. Luckily, text_offset, |
| 1493 | which comes from pst->textlow is correct. */ |
| 1494 | if (last_source_start_addr == 0) |
| 1495 | last_source_start_addr = text_offset; |
| 1496 | |
| 1497 | pst->symtab = end_symtab (text_offset + text_size, 0, 0, objfile, |
| 1498 | SECT_OFF_TEXT); |
| 1499 | end_stabs (); |
| 1500 | } |
| 1501 | |
| 1502 | \f |
| 1503 | /* This handles a single symbol from the symbol-file, building symbols |
| 1504 | into a GDB symtab. It takes these arguments and an implicit argument. |
| 1505 | |
| 1506 | TYPE is the type field of the ".stab" symbol entry. |
| 1507 | DESC is the desc field of the ".stab" entry. |
| 1508 | VALU is the value field of the ".stab" entry. |
| 1509 | NAME is the symbol name, in our address space. |
| 1510 | SECTION_OFFSETS is a set of amounts by which the sections of this object |
| 1511 | file were relocated when it was loaded into memory. |
| 1512 | All symbols that refer |
| 1513 | to memory locations need to be offset by these amounts. |
| 1514 | OBJFILE is the object file from which we are reading symbols. |
| 1515 | It is used in end_symtab. */ |
| 1516 | |
| 1517 | void |
| 1518 | process_one_symbol (type, desc, valu, name, section_offsets, objfile) |
| 1519 | int type, desc; |
| 1520 | CORE_ADDR valu; |
| 1521 | char *name; |
| 1522 | struct section_offsets *section_offsets; |
| 1523 | struct objfile *objfile; |
| 1524 | { |
| 1525 | #ifdef SUN_FIXED_LBRAC_BUG |
| 1526 | /* If SUN_FIXED_LBRAC_BUG is defined, then it tells us whether we need |
| 1527 | to correct the address of N_LBRAC's. If it is not defined, then |
| 1528 | we never need to correct the addresses. */ |
| 1529 | |
| 1530 | /* This records the last pc address we've seen. We depend on there being |
| 1531 | an SLINE or FUN or SO before the first LBRAC, since the variable does |
| 1532 | not get reset in between reads of different symbol files. */ |
| 1533 | static CORE_ADDR last_pc_address; |
| 1534 | #endif |
| 1535 | |
| 1536 | register struct context_stack *new; |
| 1537 | /* This remembers the address of the start of a function. It is used |
| 1538 | because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries are |
| 1539 | relative to the current function's start address. On systems |
| 1540 | other than Solaris 2, this just holds the SECT_OFF_TEXT value, and is |
| 1541 | used to relocate these symbol types rather than SECTION_OFFSETS. */ |
| 1542 | static CORE_ADDR function_start_offset; |
| 1543 | |
| 1544 | /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are relative |
| 1545 | to the function start address. */ |
| 1546 | int block_address_function_relative; |
| 1547 | |
| 1548 | /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this source |
| 1549 | file. Used to detect the SunPRO solaris compiler. */ |
| 1550 | int n_opt_found; |
| 1551 | |
| 1552 | /* The stab type used for the definition of the last function. |
| 1553 | N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */ |
| 1554 | static int function_stab_type = 0; |
| 1555 | |
| 1556 | /* This is true for Solaris (and all other stabs-in-elf systems, hopefully, |
| 1557 | since it would be silly to do things differently from Solaris), and |
| 1558 | false for SunOS4 and other a.out file formats. */ |
| 1559 | block_address_function_relative = |
| 1560 | 0 == strncmp (bfd_get_target (objfile->obfd), "elf", 3); |
| 1561 | |
| 1562 | if (!block_address_function_relative) |
| 1563 | /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the |
| 1564 | function start address, so just use the text offset. */ |
| 1565 | function_start_offset = ANOFFSET (section_offsets, SECT_OFF_TEXT); |
| 1566 | |
| 1567 | /* Something is wrong if we see real data before |
| 1568 | seeing a source file name. */ |
| 1569 | |
| 1570 | if (last_source_file == NULL && type != (unsigned char)N_SO) |
| 1571 | { |
| 1572 | /* Ignore any symbols which appear before an N_SO symbol. Currently |
| 1573 | no one puts symbols there, but we should deal gracefully with the |
| 1574 | case. A complain()t might be in order (if !IGNORE_SYMBOL (type)), |
| 1575 | but this should not be an error (). */ |
| 1576 | return; |
| 1577 | } |
| 1578 | |
| 1579 | switch (type) |
| 1580 | { |
| 1581 | case N_FUN: |
| 1582 | case N_FNAME: |
| 1583 | /* Relocate for dynamic loading */ |
| 1584 | valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); |
| 1585 | goto define_a_symbol; |
| 1586 | |
| 1587 | case N_LBRAC: |
| 1588 | /* This "symbol" just indicates the start of an inner lexical |
| 1589 | context within a function. */ |
| 1590 | |
| 1591 | #if defined(BLOCK_ADDRESS_ABSOLUTE) |
| 1592 | /* Relocate for dynamic loading (?). */ |
| 1593 | valu += function_start_offset; |
| 1594 | #else |
| 1595 | if (block_address_function_relative) |
| 1596 | /* Relocate for Sun ELF acc fn-relative syms. */ |
| 1597 | valu += function_start_offset; |
| 1598 | else |
| 1599 | /* On most machines, the block addresses are relative to the |
| 1600 | N_SO, the linker did not relocate them (sigh). */ |
| 1601 | valu += last_source_start_addr; |
| 1602 | #endif |
| 1603 | |
| 1604 | #ifdef SUN_FIXED_LBRAC_BUG |
| 1605 | if (!SUN_FIXED_LBRAC_BUG && valu < last_pc_address) { |
| 1606 | /* Patch current LBRAC pc value to match last handy pc value */ |
| 1607 | complain (&lbrac_complaint); |
| 1608 | valu = last_pc_address; |
| 1609 | } |
| 1610 | #endif |
| 1611 | new = push_context (desc, valu); |
| 1612 | break; |
| 1613 | |
| 1614 | case N_RBRAC: |
| 1615 | /* This "symbol" just indicates the end of an inner lexical |
| 1616 | context that was started with N_LBRAC. */ |
| 1617 | |
| 1618 | #if defined(BLOCK_ADDRESS_ABSOLUTE) |
| 1619 | /* Relocate for dynamic loading (?). */ |
| 1620 | valu += function_start_offset; |
| 1621 | #else |
| 1622 | if (block_address_function_relative) |
| 1623 | /* Relocate for Sun ELF acc fn-relative syms. */ |
| 1624 | valu += function_start_offset; |
| 1625 | else |
| 1626 | /* On most machines, the block addresses are relative to the |
| 1627 | N_SO, the linker did not relocate them (sigh). */ |
| 1628 | valu += last_source_start_addr; |
| 1629 | #endif |
| 1630 | |
| 1631 | new = pop_context(); |
| 1632 | if (desc != new->depth) |
| 1633 | complain (&lbrac_mismatch_complaint, symnum); |
| 1634 | |
| 1635 | /* Some compilers put the variable decls inside of an |
| 1636 | LBRAC/RBRAC block. This macro should be nonzero if this |
| 1637 | is true. DESC is N_DESC from the N_RBRAC symbol. |
| 1638 | GCC_P is true if we've detected the GCC_COMPILED_SYMBOL |
| 1639 | or the GCC2_COMPILED_SYMBOL. */ |
| 1640 | #if !defined (VARIABLES_INSIDE_BLOCK) |
| 1641 | #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0 |
| 1642 | #endif |
| 1643 | |
| 1644 | /* Can only use new->locals as local symbols here if we're in |
| 1645 | gcc or on a machine that puts them before the lbrack. */ |
| 1646 | if (!VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation)) |
| 1647 | local_symbols = new->locals; |
| 1648 | |
| 1649 | /* If this is not the outermost LBRAC...RBRAC pair in the |
| 1650 | function, its local symbols preceded it, and are the ones |
| 1651 | just recovered from the context stack. Defined the block for them. |
| 1652 | |
| 1653 | If this is the outermost LBRAC...RBRAC pair, there is no |
| 1654 | need to do anything; leave the symbols that preceded it |
| 1655 | to be attached to the function's own block. However, if |
| 1656 | it is so, we need to indicate that we just moved outside |
| 1657 | of the function. */ |
| 1658 | if (local_symbols |
| 1659 | && (context_stack_depth |
| 1660 | > !VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation))) |
| 1661 | { |
| 1662 | /* FIXME Muzzle a compiler bug that makes end < start. */ |
| 1663 | if (new->start_addr > valu) |
| 1664 | { |
| 1665 | complain (&lbrac_rbrac_complaint); |
| 1666 | new->start_addr = valu; |
| 1667 | } |
| 1668 | /* Make a block for the local symbols within. */ |
| 1669 | finish_block (0, &local_symbols, new->old_blocks, |
| 1670 | new->start_addr, valu, objfile); |
| 1671 | } |
| 1672 | else |
| 1673 | { |
| 1674 | within_function = 0; |
| 1675 | } |
| 1676 | if (VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation)) |
| 1677 | /* Now pop locals of block just finished. */ |
| 1678 | local_symbols = new->locals; |
| 1679 | break; |
| 1680 | |
| 1681 | case N_FN: |
| 1682 | case N_FN_SEQ: |
| 1683 | /* This kind of symbol indicates the start of an object file. */ |
| 1684 | /* Relocate for dynamic loading */ |
| 1685 | valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); |
| 1686 | break; |
| 1687 | |
| 1688 | case N_SO: |
| 1689 | /* This type of symbol indicates the start of data |
| 1690 | for one source file. |
| 1691 | Finish the symbol table of the previous source file |
| 1692 | (if any) and start accumulating a new symbol table. */ |
| 1693 | /* Relocate for dynamic loading */ |
| 1694 | valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); |
| 1695 | |
| 1696 | n_opt_found = 0; |
| 1697 | |
| 1698 | #ifdef SUN_FIXED_LBRAC_BUG |
| 1699 | last_pc_address = valu; /* Save for SunOS bug circumcision */ |
| 1700 | #endif |
| 1701 | |
| 1702 | #ifdef PCC_SOL_BROKEN |
| 1703 | /* pcc bug, occasionally puts out SO for SOL. */ |
| 1704 | if (context_stack_depth > 0) |
| 1705 | { |
| 1706 | start_subfile (name, NULL); |
| 1707 | break; |
| 1708 | } |
| 1709 | #endif |
| 1710 | if (last_source_file) |
| 1711 | { |
| 1712 | /* Check if previous symbol was also an N_SO (with some |
| 1713 | sanity checks). If so, that one was actually the directory |
| 1714 | name, and the current one is the real file name. |
| 1715 | Patch things up. */ |
| 1716 | if (previous_stab_code == (unsigned char) N_SO) |
| 1717 | { |
| 1718 | patch_subfile_names (current_subfile, name); |
| 1719 | break; /* Ignore repeated SOs */ |
| 1720 | } |
| 1721 | end_symtab (valu, 0, 0, objfile, SECT_OFF_TEXT); |
| 1722 | end_stabs (); |
| 1723 | } |
| 1724 | start_stabs (); |
| 1725 | start_symtab (name, NULL, valu); |
| 1726 | break; |
| 1727 | |
| 1728 | |
| 1729 | case N_SOL: |
| 1730 | /* This type of symbol indicates the start of data for |
| 1731 | a sub-source-file, one whose contents were copied or |
| 1732 | included in the compilation of the main source file |
| 1733 | (whose name was given in the N_SO symbol.) */ |
| 1734 | /* Relocate for dynamic loading */ |
| 1735 | valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); |
| 1736 | start_subfile (name, current_subfile->dirname); |
| 1737 | break; |
| 1738 | |
| 1739 | case N_BINCL: |
| 1740 | push_subfile (); |
| 1741 | add_new_header_file (name, valu); |
| 1742 | start_subfile (name, current_subfile->dirname); |
| 1743 | break; |
| 1744 | |
| 1745 | case N_EINCL: |
| 1746 | start_subfile (pop_subfile (), current_subfile->dirname); |
| 1747 | break; |
| 1748 | |
| 1749 | case N_EXCL: |
| 1750 | add_old_header_file (name, valu); |
| 1751 | break; |
| 1752 | |
| 1753 | case N_SLINE: |
| 1754 | /* This type of "symbol" really just records |
| 1755 | one line-number -- core-address correspondence. |
| 1756 | Enter it in the line list for this symbol table. */ |
| 1757 | /* Relocate for dynamic loading and for ELF acc fn-relative syms. */ |
| 1758 | valu += function_start_offset; |
| 1759 | #ifdef SUN_FIXED_LBRAC_BUG |
| 1760 | last_pc_address = valu; /* Save for SunOS bug circumcision */ |
| 1761 | #endif |
| 1762 | record_line (current_subfile, desc, valu); |
| 1763 | break; |
| 1764 | |
| 1765 | case N_BCOMM: |
| 1766 | if (common_block) |
| 1767 | { |
| 1768 | static struct complaint msg = { |
| 1769 | "Invalid symbol data: common within common at symtab pos %d", |
| 1770 | 0, 0}; |
| 1771 | complain (&msg, symnum); |
| 1772 | } |
| 1773 | common_block = local_symbols; |
| 1774 | common_block_i = local_symbols ? local_symbols->nsyms : 0; |
| 1775 | break; |
| 1776 | |
| 1777 | case N_ECOMM: |
| 1778 | /* Symbols declared since the BCOMM are to have the common block |
| 1779 | start address added in when we know it. common_block points to |
| 1780 | the first symbol after the BCOMM in the local_symbols list; |
| 1781 | copy the list and hang it off the symbol for the common block name |
| 1782 | for later fixup. */ |
| 1783 | { |
| 1784 | int i; |
| 1785 | struct symbol *sym = |
| 1786 | (struct symbol *) xmmalloc (objfile -> md, sizeof (struct symbol)); |
| 1787 | memset (sym, 0, sizeof *sym); |
| 1788 | SYMBOL_NAME (sym) = savestring (name, strlen (name)); |
| 1789 | SYMBOL_CLASS (sym) = LOC_BLOCK; |
| 1790 | SYMBOL_NAMESPACE (sym) = (enum namespace)((long) |
| 1791 | copy_pending (local_symbols, common_block_i, common_block)); |
| 1792 | i = hashname (SYMBOL_NAME (sym)); |
| 1793 | SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i]; |
| 1794 | global_sym_chain[i] = sym; |
| 1795 | common_block = 0; |
| 1796 | break; |
| 1797 | } |
| 1798 | |
| 1799 | /* The following symbol types need to have the appropriate offset added |
| 1800 | to their value; then we process symbol definitions in the name. */ |
| 1801 | |
| 1802 | case N_STSYM: /* Static symbol in data seg */ |
| 1803 | case N_LCSYM: /* Static symbol in BSS seg */ |
| 1804 | case N_ROSYM: /* Static symbol in Read-only data seg */ |
| 1805 | /* HORRID HACK DEPT. However, it's Sun's furgin' fault. FIXME. |
| 1806 | Solaris2's stabs-in-coff makes *most* symbols relative |
| 1807 | but leaves a few absolute. N_STSYM and friends sit on the fence. |
| 1808 | .stab "foo:S...",N_STSYM is absolute (ld relocates it) |
| 1809 | .stab "foo:V...",N_STSYM is relative (section base subtracted). |
| 1810 | This leaves us no choice but to search for the 'S' or 'V'... |
| 1811 | (or pass the whole section_offsets stuff down ONE MORE function |
| 1812 | call level, which we really don't want to do). |
| 1813 | |
| 1814 | The above is indeed true for Solaris 2.1. I'm not sure what |
| 1815 | happens in Solaris 2.3, in which ld stops relocating stabs. */ |
| 1816 | { |
| 1817 | char *p; |
| 1818 | p = strchr (name, ':'); |
| 1819 | if (p != 0 && p[1] == 'S') |
| 1820 | { |
| 1821 | /* FIXME! We relocate it by the TEXT offset, in case the |
| 1822 | whole module moved in memory. But this is wrong, since |
| 1823 | the sections can side around independently. (I suspect that |
| 1824 | the text offset is always zero anyway--elfread.c doesn't |
| 1825 | process (and Sun cc doesn't produce) Ttext.text symbols). */ |
| 1826 | valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); |
| 1827 | goto define_a_symbol; |
| 1828 | } |
| 1829 | /* Since it's not the kludge case, re-dispatch to the right handler. */ |
| 1830 | switch (type) { |
| 1831 | case N_STSYM: goto case_N_STSYM; |
| 1832 | case N_LCSYM: goto case_N_LCSYM; |
| 1833 | case N_ROSYM: goto case_N_ROSYM; |
| 1834 | default: abort(); |
| 1835 | } |
| 1836 | } |
| 1837 | |
| 1838 | case_N_STSYM: /* Static symbol in data seg */ |
| 1839 | case N_DSLINE: /* Source line number, data seg */ |
| 1840 | valu += ANOFFSET (section_offsets, SECT_OFF_DATA); |
| 1841 | goto define_a_symbol; |
| 1842 | |
| 1843 | case_N_LCSYM: /* Static symbol in BSS seg */ |
| 1844 | case N_BSLINE: /* Source line number, bss seg */ |
| 1845 | /* N_BROWS: overlaps with N_BSLINE */ |
| 1846 | valu += ANOFFSET (section_offsets, SECT_OFF_BSS); |
| 1847 | goto define_a_symbol; |
| 1848 | |
| 1849 | case_N_ROSYM: /* Static symbol in Read-only data seg */ |
| 1850 | valu += ANOFFSET (section_offsets, SECT_OFF_RODATA); |
| 1851 | goto define_a_symbol; |
| 1852 | |
| 1853 | case N_ENTRY: /* Alternate entry point */ |
| 1854 | /* Relocate for dynamic loading */ |
| 1855 | valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); |
| 1856 | goto define_a_symbol; |
| 1857 | |
| 1858 | /* The following symbol types we don't know how to process. Handle |
| 1859 | them in a "default" way, but complain to people who care. */ |
| 1860 | default: |
| 1861 | case N_CATCH: /* Exception handler catcher */ |
| 1862 | case N_EHDECL: /* Exception handler name */ |
| 1863 | case N_PC: /* Global symbol in Pascal */ |
| 1864 | case N_M2C: /* Modula-2 compilation unit */ |
| 1865 | /* N_MOD2: overlaps with N_EHDECL */ |
| 1866 | case N_SCOPE: /* Modula-2 scope information */ |
| 1867 | case N_ECOML: /* End common (local name) */ |
| 1868 | case N_NBTEXT: /* Gould Non-Base-Register symbols??? */ |
| 1869 | case N_NBDATA: |
| 1870 | case N_NBBSS: |
| 1871 | case N_NBSTS: |
| 1872 | case N_NBLCS: |
| 1873 | complain (&unknown_symtype_complaint, local_hex_string(type)); |
| 1874 | /* FALLTHROUGH */ |
| 1875 | |
| 1876 | /* The following symbol types don't need the address field relocated, |
| 1877 | since it is either unused, or is absolute. */ |
| 1878 | define_a_symbol: |
| 1879 | case N_GSYM: /* Global variable */ |
| 1880 | case N_NSYMS: /* Number of symbols (ultrix) */ |
| 1881 | case N_NOMAP: /* No map? (ultrix) */ |
| 1882 | case N_RSYM: /* Register variable */ |
| 1883 | case N_DEFD: /* Modula-2 GNU module dependency */ |
| 1884 | case N_SSYM: /* Struct or union element */ |
| 1885 | case N_LSYM: /* Local symbol in stack */ |
| 1886 | case N_PSYM: /* Parameter variable */ |
| 1887 | case N_LENG: /* Length of preceding symbol type */ |
| 1888 | if (name) |
| 1889 | { |
| 1890 | int deftype; |
| 1891 | char *colon_pos = strchr (name, ':'); |
| 1892 | if (colon_pos == NULL) |
| 1893 | deftype = '\0'; |
| 1894 | else |
| 1895 | deftype = colon_pos[1]; |
| 1896 | |
| 1897 | switch (deftype) |
| 1898 | { |
| 1899 | case 'f': |
| 1900 | case 'F': |
| 1901 | function_stab_type = type; |
| 1902 | |
| 1903 | #ifdef SUN_FIXED_LBRAC_BUG |
| 1904 | /* The Sun acc compiler, under SunOS4, puts out |
| 1905 | functions with N_GSYM or N_STSYM. The problem is |
| 1906 | that the address of the symbol is no good (for N_GSYM |
| 1907 | it doesn't even attept an address; for N_STSYM it |
| 1908 | puts out an address but then it gets relocated |
| 1909 | relative to the data segment, not the text segment). |
| 1910 | Currently we can't fix this up later as we do for |
| 1911 | some types of symbol in scan_file_globals. |
| 1912 | Fortunately we do have a way of finding the address - |
| 1913 | we know that the value in last_pc_address is either |
| 1914 | the one we want (if we're dealing with the first |
| 1915 | function in an object file), or somewhere in the |
| 1916 | previous function. This means that we can use the |
| 1917 | minimal symbol table to get the address. */ |
| 1918 | |
| 1919 | /* On solaris up to 2.2, the N_FUN stab gets relocated. |
| 1920 | On Solaris 2.3, ld no longer relocates stabs (which |
| 1921 | is good), and the N_FUN's value is now always zero. |
| 1922 | We only provide this correction for functions, not for |
| 1923 | all N_FUN symbols, because that is easiest and all |
| 1924 | readonly variables seem to go in the .rodata on Solaris. */ |
| 1925 | |
| 1926 | if (type == N_GSYM || type == N_STSYM |
| 1927 | || (type == N_FUN && valu == 0)) |
| 1928 | { |
| 1929 | struct minimal_symbol *m; |
| 1930 | int l = colon_pos - name; |
| 1931 | |
| 1932 | m = lookup_minimal_symbol_by_pc (last_pc_address); |
| 1933 | if (m && STREQN (SYMBOL_NAME (m), name, l)) |
| 1934 | /* last_pc_address was in this function */ |
| 1935 | valu = SYMBOL_VALUE (m); |
| 1936 | else |
| 1937 | { |
| 1938 | m = lookup_next_minimal_symbol (last_pc_address); |
| 1939 | if (m && STREQN (SYMBOL_NAME (m), name, l)) |
| 1940 | /* last_pc_address was in last function */ |
| 1941 | valu = SYMBOL_VALUE (m); |
| 1942 | else |
| 1943 | /* Not found. |
| 1944 | Use last_pc_address (for finish_block). */ |
| 1945 | valu = last_pc_address; |
| 1946 | } |
| 1947 | } |
| 1948 | |
| 1949 | last_pc_address = valu; /* Save for SunOS bug circumcision */ |
| 1950 | #endif |
| 1951 | |
| 1952 | if (block_address_function_relative) |
| 1953 | /* For Solaris 2.0 compilers, the block addresses and |
| 1954 | N_SLINE's are relative to the start of the |
| 1955 | function. On normal systems, and when using gcc on |
| 1956 | Solaris 2.0, these addresses are just absolute, or |
| 1957 | relative to the N_SO, depending on |
| 1958 | BLOCK_ADDRESS_ABSOLUTE. */ |
| 1959 | function_start_offset = valu; |
| 1960 | |
| 1961 | within_function = 1; |
| 1962 | if (context_stack_depth > 0) |
| 1963 | { |
| 1964 | new = pop_context (); |
| 1965 | /* Make a block for the local symbols within. */ |
| 1966 | finish_block (new->name, &local_symbols, new->old_blocks, |
| 1967 | new->start_addr, valu, objfile); |
| 1968 | } |
| 1969 | /* Stack must be empty now. */ |
| 1970 | if (context_stack_depth != 0) |
| 1971 | complain (&lbrac_unmatched_complaint, symnum); |
| 1972 | |
| 1973 | new = push_context (0, valu); |
| 1974 | new->name = define_symbol (valu, name, desc, type, objfile); |
| 1975 | break; |
| 1976 | |
| 1977 | default: |
| 1978 | define_symbol (valu, name, desc, type, objfile); |
| 1979 | break; |
| 1980 | } |
| 1981 | } |
| 1982 | break; |
| 1983 | |
| 1984 | /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it |
| 1985 | for a bunch of other flags, too. Someday we may parse their |
| 1986 | flags; for now we ignore theirs and hope they'll ignore ours. */ |
| 1987 | case N_OPT: /* Solaris 2: Compiler options */ |
| 1988 | if (name) |
| 1989 | { |
| 1990 | if (STREQ (name, GCC2_COMPILED_FLAG_SYMBOL)) |
| 1991 | { |
| 1992 | processing_gcc_compilation = 2; |
| 1993 | #if 1 /* Works, but is experimental. -fnf */ |
| 1994 | if (AUTO_DEMANGLING) |
| 1995 | { |
| 1996 | set_demangling_style (GNU_DEMANGLING_STYLE_STRING); |
| 1997 | } |
| 1998 | #endif |
| 1999 | } |
| 2000 | else |
| 2001 | n_opt_found = 1; |
| 2002 | } |
| 2003 | break; |
| 2004 | |
| 2005 | /* The following symbol types can be ignored. */ |
| 2006 | case N_OBJ: /* Solaris 2: Object file dir and name */ |
| 2007 | /* N_UNDF: Solaris 2: file separator mark */ |
| 2008 | /* N_UNDF: -- we will never encounter it, since we only process one |
| 2009 | file's symbols at once. */ |
| 2010 | case N_ENDM: /* Solaris 2: End of module */ |
| 2011 | case N_MAIN: /* Name of main routine. */ |
| 2012 | break; |
| 2013 | } |
| 2014 | |
| 2015 | previous_stab_code = type; |
| 2016 | } |
| 2017 | \f |
| 2018 | /* Copy a pending list, used to record the contents of a common |
| 2019 | block for later fixup. We copy the symbols starting with all |
| 2020 | symbols in BEG, and ending with the symbols which are in |
| 2021 | END at index ENDI. */ |
| 2022 | static struct pending * |
| 2023 | copy_pending (beg, endi, end) |
| 2024 | struct pending *beg; |
| 2025 | int endi; |
| 2026 | struct pending *end; |
| 2027 | { |
| 2028 | struct pending *new = 0; |
| 2029 | struct pending *next; |
| 2030 | int j; |
| 2031 | |
| 2032 | /* Copy all the struct pendings before end. */ |
| 2033 | for (next = beg; next != NULL && next != end; next = next->next) |
| 2034 | { |
| 2035 | for (j = 0; j < next->nsyms; j++) |
| 2036 | add_symbol_to_list (next->symbol[j], &new); |
| 2037 | } |
| 2038 | |
| 2039 | /* Copy however much of END we need. */ |
| 2040 | for (j = endi; j < end->nsyms; j++) |
| 2041 | add_symbol_to_list (end->symbol[j], &new); |
| 2042 | |
| 2043 | return new; |
| 2044 | } |
| 2045 | \f |
| 2046 | /* Scan and build partial symbols for an ELF symbol file. |
| 2047 | This ELF file has already been processed to get its minimal symbols, |
| 2048 | and any DWARF symbols that were in it. |
| 2049 | |
| 2050 | This routine is the equivalent of dbx_symfile_init and dbx_symfile_read |
| 2051 | rolled into one. |
| 2052 | |
| 2053 | OBJFILE is the object file we are reading symbols from. |
| 2054 | ADDR is the address relative to which the symbols are (e.g. |
| 2055 | the base address of the text segment). |
| 2056 | MAINLINE is true if we are reading the main symbol |
| 2057 | table (as opposed to a shared lib or dynamically loaded file). |
| 2058 | STABOFFSET and STABSIZE define the location in OBJFILE where the .stab |
| 2059 | section exists. |
| 2060 | STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the |
| 2061 | .stabstr section exists. |
| 2062 | |
| 2063 | This routine is mostly copied from dbx_symfile_init and dbx_symfile_read, |
| 2064 | adjusted for elf details. */ |
| 2065 | |
| 2066 | void |
| 2067 | elfstab_build_psymtabs (objfile, section_offsets, mainline, |
| 2068 | staboffset, stabsize, |
| 2069 | stabstroffset, stabstrsize) |
| 2070 | struct objfile *objfile; |
| 2071 | struct section_offsets *section_offsets; |
| 2072 | int mainline; |
| 2073 | file_ptr staboffset; |
| 2074 | unsigned int stabsize; |
| 2075 | file_ptr stabstroffset; |
| 2076 | unsigned int stabstrsize; |
| 2077 | { |
| 2078 | int val; |
| 2079 | bfd *sym_bfd = objfile->obfd; |
| 2080 | char *name = bfd_get_filename (sym_bfd); |
| 2081 | struct dbx_symfile_info *info; |
| 2082 | |
| 2083 | /* There is already a dbx_symfile_info allocated by our caller. |
| 2084 | It might even contain some info from the ELF symtab to help us. */ |
| 2085 | info = (struct dbx_symfile_info *) objfile->sym_private; |
| 2086 | |
| 2087 | DBX_TEXT_SECT (objfile) = bfd_get_section_by_name (sym_bfd, ".text"); |
| 2088 | if (!DBX_TEXT_SECT (objfile)) |
| 2089 | error ("Can't find .text section in symbol file"); |
| 2090 | |
| 2091 | #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */ |
| 2092 | DBX_SYMBOL_SIZE (objfile) = ELF_STABS_SYMBOL_SIZE; |
| 2093 | DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile); |
| 2094 | DBX_STRINGTAB_SIZE (objfile) = stabstrsize; |
| 2095 | DBX_SYMTAB_OFFSET (objfile) = staboffset; |
| 2096 | |
| 2097 | if (stabstrsize > bfd_get_size (sym_bfd)) |
| 2098 | error ("ridiculous string table size: %d bytes", stabstrsize); |
| 2099 | DBX_STRINGTAB (objfile) = (char *) |
| 2100 | obstack_alloc (&objfile->psymbol_obstack, stabstrsize+1); |
| 2101 | |
| 2102 | /* Now read in the string table in one big gulp. */ |
| 2103 | |
| 2104 | val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET); |
| 2105 | if (val < 0) |
| 2106 | perror_with_name (name); |
| 2107 | val = bfd_read (DBX_STRINGTAB (objfile), stabstrsize, 1, sym_bfd); |
| 2108 | if (val != stabstrsize) |
| 2109 | perror_with_name (name); |
| 2110 | |
| 2111 | stabsread_new_init (); |
| 2112 | buildsym_new_init (); |
| 2113 | free_header_files (); |
| 2114 | init_header_files (); |
| 2115 | install_minimal_symbols (objfile); |
| 2116 | |
| 2117 | processing_acc_compilation = 1; |
| 2118 | |
| 2119 | /* In an elf file, we've already installed the minimal symbols that came |
| 2120 | from the elf (non-stab) symbol table, so always act like an |
| 2121 | incremental load here. */ |
| 2122 | dbx_symfile_read (objfile, section_offsets, 0); |
| 2123 | } |
| 2124 | \f |
| 2125 | /* Scan and build partial symbols for a PA symbol file. |
| 2126 | This PA file has already been processed to get its minimal symbols. |
| 2127 | |
| 2128 | OBJFILE is the object file we are reading symbols from. |
| 2129 | ADDR is the address relative to which the symbols are (e.g. |
| 2130 | the base address of the text segment). |
| 2131 | MAINLINE is true if we are reading the main symbol |
| 2132 | table (as opposed to a shared lib or dynamically loaded file). |
| 2133 | |
| 2134 | */ |
| 2135 | |
| 2136 | void |
| 2137 | pastab_build_psymtabs (objfile, section_offsets, mainline) |
| 2138 | struct objfile *objfile; |
| 2139 | struct section_offsets *section_offsets; |
| 2140 | int mainline; |
| 2141 | { |
| 2142 | free_header_files (); |
| 2143 | init_header_files (); |
| 2144 | |
| 2145 | /* In a PA file, we've already installed the minimal symbols that came |
| 2146 | from the PA (non-stab) symbol table, so always act like an |
| 2147 | incremental load here. */ |
| 2148 | |
| 2149 | dbx_symfile_read (objfile, section_offsets, mainline); |
| 2150 | } |
| 2151 | \f |
| 2152 | /* Parse the user's idea of an offset for dynamic linking, into our idea |
| 2153 | of how to represent it for fast symbol reading. */ |
| 2154 | |
| 2155 | static struct section_offsets * |
| 2156 | dbx_symfile_offsets (objfile, addr) |
| 2157 | struct objfile *objfile; |
| 2158 | CORE_ADDR addr; |
| 2159 | { |
| 2160 | struct section_offsets *section_offsets; |
| 2161 | int i; |
| 2162 | |
| 2163 | section_offsets = (struct section_offsets *) |
| 2164 | obstack_alloc (&objfile -> psymbol_obstack, |
| 2165 | sizeof (struct section_offsets) + |
| 2166 | sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1)); |
| 2167 | |
| 2168 | for (i = 0; i < SECT_OFF_MAX; i++) |
| 2169 | ANOFFSET (section_offsets, i) = addr; |
| 2170 | |
| 2171 | return section_offsets; |
| 2172 | } |
| 2173 | \f |
| 2174 | /* Register our willingness to decode symbols for SunOS and a.out and |
| 2175 | NetBSD and b.out files handled by BFD... */ |
| 2176 | static struct sym_fns sunos_sym_fns = |
| 2177 | { |
| 2178 | "sunOs", /* sym_name: name or name prefix of BFD target type */ |
| 2179 | 6, /* sym_namelen: number of significant sym_name chars */ |
| 2180 | dbx_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
| 2181 | dbx_symfile_init, /* sym_init: read initial info, setup for sym_read() */ |
| 2182 | dbx_symfile_read, /* sym_read: read a symbol file into symtab */ |
| 2183 | dbx_symfile_finish, /* sym_finish: finished with file, cleanup */ |
| 2184 | dbx_symfile_offsets, /* sym_offsets: parse user's offsets to internal form */ |
| 2185 | NULL /* next: pointer to next struct sym_fns */ |
| 2186 | }; |
| 2187 | |
| 2188 | static struct sym_fns aout_sym_fns = |
| 2189 | { |
| 2190 | "a.out", /* sym_name: name or name prefix of BFD target type */ |
| 2191 | 5, /* sym_namelen: number of significant sym_name chars */ |
| 2192 | dbx_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
| 2193 | dbx_symfile_init, /* sym_init: read initial info, setup for sym_read() */ |
| 2194 | dbx_symfile_read, /* sym_read: read a symbol file into symtab */ |
| 2195 | dbx_symfile_finish, /* sym_finish: finished with file, cleanup */ |
| 2196 | dbx_symfile_offsets, /* sym_offsets: parse user's offsets to internal form */ |
| 2197 | NULL /* next: pointer to next struct sym_fns */ |
| 2198 | }; |
| 2199 | |
| 2200 | static struct sym_fns bout_sym_fns = |
| 2201 | { |
| 2202 | "b.out", /* sym_name: name or name prefix of BFD target type */ |
| 2203 | 5, /* sym_namelen: number of significant sym_name chars */ |
| 2204 | dbx_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
| 2205 | dbx_symfile_init, /* sym_init: read initial info, setup for sym_read() */ |
| 2206 | dbx_symfile_read, /* sym_read: read a symbol file into symtab */ |
| 2207 | dbx_symfile_finish, /* sym_finish: finished with file, cleanup */ |
| 2208 | dbx_symfile_offsets, /* sym_offsets: parse user's offsets to internal form */ |
| 2209 | NULL /* next: pointer to next struct sym_fns */ |
| 2210 | }; |
| 2211 | |
| 2212 | void |
| 2213 | _initialize_dbxread () |
| 2214 | { |
| 2215 | add_symtab_fns(&sunos_sym_fns); |
| 2216 | add_symtab_fns(&aout_sym_fns); |
| 2217 | add_symtab_fns(&bout_sym_fns); |
| 2218 | } |