| 1 | /* Read coff symbol tables and convert to internal format, for GDB. |
| 2 | Contributed by David D. Johnson, Brown University (ddj@cs.brown.edu). |
| 3 | Copyright 1987, 1988, 1989, 1990, 1991, 1992, 1993 |
| 4 | Free Software Foundation, Inc. |
| 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include "symtab.h" |
| 24 | #include "gdbtypes.h" |
| 25 | #include "breakpoint.h" |
| 26 | |
| 27 | #include "bfd.h" |
| 28 | #include <obstack.h> |
| 29 | |
| 30 | #include <string.h> |
| 31 | |
| 32 | #include <time.h> /* For time_t in libbfd.h. */ |
| 33 | #include <sys/types.h> /* For time_t, if not in time.h. */ |
| 34 | #include "libbfd.h" /* FIXME secret internal data from BFD */ |
| 35 | #include "coff/internal.h" /* Internal format of COFF symbols in BFD */ |
| 36 | #include "libcoff.h" /* FIXME secret internal data from BFD */ |
| 37 | |
| 38 | #include "symfile.h" |
| 39 | #include "objfiles.h" |
| 40 | #include "buildsym.h" |
| 41 | #include "gdb-stabs.h" |
| 42 | #include "stabsread.h" |
| 43 | #include "complaints.h" |
| 44 | |
| 45 | struct coff_symfile_info { |
| 46 | file_ptr min_lineno_offset; /* Where in file lowest line#s are */ |
| 47 | file_ptr max_lineno_offset; /* 1+last byte of line#s in file */ |
| 48 | |
| 49 | asection *stabsect; /* Section pointer for .stab section */ |
| 50 | asection *stabstrsect; /* Section pointer for .stab section */ |
| 51 | asection *stabindexsect; /* Section pointer for .stab.index section */ |
| 52 | char *stabstrdata; |
| 53 | }; |
| 54 | |
| 55 | /* Translate an external name string into a user-visible name. */ |
| 56 | #define EXTERNAL_NAME(string, abfd) \ |
| 57 | (string[0] == bfd_get_symbol_leading_char(abfd)? string+1: string) |
| 58 | |
| 59 | /* To be an sdb debug type, type must have at least a basic or primary |
| 60 | derived type. Using this rather than checking against T_NULL is |
| 61 | said to prevent core dumps if we try to operate on Michael Bloom |
| 62 | dbx-in-coff file. */ |
| 63 | |
| 64 | #define SDB_TYPE(type) (BTYPE(type) | (type & N_TMASK)) |
| 65 | |
| 66 | /* |
| 67 | * Convert from an sdb register number to an internal gdb register number. |
| 68 | * This should be defined in tm.h, if REGISTER_NAMES is not set up |
| 69 | * to map one to one onto the sdb register numbers. |
| 70 | */ |
| 71 | #ifndef SDB_REG_TO_REGNUM |
| 72 | # define SDB_REG_TO_REGNUM(value) (value) |
| 73 | #endif |
| 74 | |
| 75 | /* Core address of start and end of text of current source file. |
| 76 | This comes from a ".text" symbol where x_nlinno > 0. */ |
| 77 | |
| 78 | static CORE_ADDR cur_src_start_addr; |
| 79 | static CORE_ADDR cur_src_end_addr; |
| 80 | |
| 81 | /* The addresses of the symbol table stream and number of symbols |
| 82 | of the object file we are reading (as copied into core). */ |
| 83 | |
| 84 | static GDB_FILE *nlist_stream_global; |
| 85 | static int nlist_nsyms_global; |
| 86 | |
| 87 | /* Vector of line number information. */ |
| 88 | |
| 89 | static struct linetable *line_vector; |
| 90 | |
| 91 | /* Index of next entry to go in line_vector_index. */ |
| 92 | |
| 93 | static int line_vector_index; |
| 94 | |
| 95 | /* Last line number recorded in the line vector. */ |
| 96 | |
| 97 | static int prev_line_number; |
| 98 | |
| 99 | /* Number of elements allocated for line_vector currently. */ |
| 100 | |
| 101 | static int line_vector_length; |
| 102 | |
| 103 | /* Pointers to scratch storage, used for reading raw symbols and auxents. */ |
| 104 | |
| 105 | static char *temp_sym; |
| 106 | static char *temp_aux; |
| 107 | |
| 108 | /* Local variables that hold the shift and mask values for the |
| 109 | COFF file that we are currently reading. These come back to us |
| 110 | from BFD, and are referenced by their macro names, as well as |
| 111 | internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF |
| 112 | macros from ../internalcoff.h . */ |
| 113 | |
| 114 | static unsigned local_n_btmask; |
| 115 | static unsigned local_n_btshft; |
| 116 | static unsigned local_n_tmask; |
| 117 | static unsigned local_n_tshift; |
| 118 | |
| 119 | #define N_BTMASK local_n_btmask |
| 120 | #define N_BTSHFT local_n_btshft |
| 121 | #define N_TMASK local_n_tmask |
| 122 | #define N_TSHIFT local_n_tshift |
| 123 | |
| 124 | /* Local variables that hold the sizes in the file of various COFF structures. |
| 125 | (We only need to know this to read them from the file -- BFD will then |
| 126 | translate the data in them, into `internal_xxx' structs in the right |
| 127 | byte order, alignment, etc.) */ |
| 128 | |
| 129 | static unsigned local_linesz; |
| 130 | static unsigned local_symesz; |
| 131 | static unsigned local_auxesz; |
| 132 | |
| 133 | |
| 134 | /* Chain of typedefs of pointers to empty struct/union types. |
| 135 | They are chained thru the SYMBOL_VALUE_CHAIN. */ |
| 136 | |
| 137 | static struct symbol *opaque_type_chain[HASHSIZE]; |
| 138 | |
| 139 | #if 0 |
| 140 | /* The type of the function we are currently reading in. This is |
| 141 | used by define_symbol to record the type of arguments to a function. */ |
| 142 | |
| 143 | struct type *in_function_type; |
| 144 | #endif |
| 145 | |
| 146 | struct pending_block *pending_blocks; |
| 147 | |
| 148 | /* Complaints about various problems in the file being read */ |
| 149 | |
| 150 | struct complaint ef_complaint = |
| 151 | {"Unmatched .ef symbol(s) ignored starting at symnum %d", 0, 0}; |
| 152 | |
| 153 | struct complaint bf_no_aux_complaint = |
| 154 | {"`.bf' symbol %d has no aux entry", 0, 0}; |
| 155 | |
| 156 | struct complaint ef_no_aux_complaint = |
| 157 | {"`.ef' symbol %d has no aux entry", 0, 0}; |
| 158 | |
| 159 | struct complaint lineno_complaint = |
| 160 | {"Line number pointer %d lower than start of line numbers", 0, 0}; |
| 161 | |
| 162 | struct complaint unexpected_type_complaint = |
| 163 | {"Unexpected type for symbol %s", 0, 0}; |
| 164 | |
| 165 | struct complaint bad_sclass_complaint = |
| 166 | {"Bad n_sclass for symbol %s", 0, 0}; |
| 167 | |
| 168 | struct complaint misordered_blocks_complaint = |
| 169 | {"Blocks out of order at address %x", 0, 0}; |
| 170 | |
| 171 | struct complaint tagndx_bad_complaint = |
| 172 | {"Symbol table entry for %s has bad tagndx value", 0, 0}; |
| 173 | |
| 174 | struct complaint eb_complaint = |
| 175 | {"Mismatched .eb symbol ignored starting at symnum %d", 0, 0}; |
| 176 | |
| 177 | /* Simplified internal version of coff symbol table information */ |
| 178 | |
| 179 | struct coff_symbol { |
| 180 | char *c_name; |
| 181 | int c_symnum; /* symbol number of this entry */ |
| 182 | int c_naux; /* 0 if syment only, 1 if syment + auxent, etc */ |
| 183 | long c_value; |
| 184 | int c_sclass; |
| 185 | int c_secnum; |
| 186 | unsigned int c_type; |
| 187 | }; |
| 188 | |
| 189 | static struct type * |
| 190 | coff_read_struct_type PARAMS ((int, int, int)); |
| 191 | |
| 192 | static struct type * |
| 193 | decode_base_type PARAMS ((struct coff_symbol *, unsigned int, |
| 194 | union internal_auxent *)); |
| 195 | |
| 196 | static struct type * |
| 197 | decode_type PARAMS ((struct coff_symbol *, unsigned int, |
| 198 | union internal_auxent *)); |
| 199 | |
| 200 | static struct type * |
| 201 | decode_function_type PARAMS ((struct coff_symbol *, unsigned int, |
| 202 | union internal_auxent *)); |
| 203 | |
| 204 | static struct type * |
| 205 | coff_read_enum_type PARAMS ((int, int, int)); |
| 206 | |
| 207 | static struct symbol * |
| 208 | process_coff_symbol PARAMS ((struct coff_symbol *, union internal_auxent *, |
| 209 | struct objfile *)); |
| 210 | |
| 211 | static void |
| 212 | patch_opaque_types PARAMS ((struct symtab *)); |
| 213 | |
| 214 | static void |
| 215 | patch_type PARAMS ((struct type *, struct type *)); |
| 216 | |
| 217 | static void |
| 218 | enter_linenos PARAMS ((long, int, int)); |
| 219 | |
| 220 | static void |
| 221 | free_linetab PARAMS ((void)); |
| 222 | |
| 223 | static int |
| 224 | init_lineno PARAMS ((int, long, int)); |
| 225 | |
| 226 | static char * |
| 227 | getsymname PARAMS ((struct internal_syment *)); |
| 228 | |
| 229 | static void |
| 230 | free_stringtab PARAMS ((void)); |
| 231 | |
| 232 | static int |
| 233 | init_stringtab PARAMS ((int, long)); |
| 234 | |
| 235 | static void |
| 236 | read_one_sym PARAMS ((struct coff_symbol *, struct internal_syment *, |
| 237 | union internal_auxent *)); |
| 238 | |
| 239 | static void |
| 240 | read_coff_symtab PARAMS ((long, int, struct objfile *)); |
| 241 | |
| 242 | static void |
| 243 | find_linenos PARAMS ((bfd *, sec_ptr, PTR)); |
| 244 | |
| 245 | static void |
| 246 | coff_symfile_init PARAMS ((struct objfile *)); |
| 247 | |
| 248 | static void |
| 249 | coff_new_init PARAMS ((struct objfile *)); |
| 250 | |
| 251 | static void |
| 252 | coff_symfile_read PARAMS ((struct objfile *, struct section_offsets *, int)); |
| 253 | |
| 254 | static void |
| 255 | coff_symfile_finish PARAMS ((struct objfile *)); |
| 256 | |
| 257 | static void record_minimal_symbol |
| 258 | PARAMS ((char *, CORE_ADDR, enum minimal_symbol_type, struct objfile *)); |
| 259 | |
| 260 | static void |
| 261 | coff_end_symtab PARAMS ((struct objfile *)); |
| 262 | |
| 263 | static void |
| 264 | complete_symtab PARAMS ((char *, CORE_ADDR, unsigned int)); |
| 265 | |
| 266 | static void |
| 267 | coff_start_symtab PARAMS ((void)); |
| 268 | |
| 269 | static void |
| 270 | coff_record_line PARAMS ((int, CORE_ADDR)); |
| 271 | |
| 272 | static struct type * |
| 273 | coff_alloc_type PARAMS ((int)); |
| 274 | |
| 275 | static struct type ** |
| 276 | coff_lookup_type PARAMS ((int)); |
| 277 | |
| 278 | \f |
| 279 | static void |
| 280 | coff_locate_sections PARAMS ((bfd *, asection *, PTR)); |
| 281 | |
| 282 | /* We are called once per section from coff_symfile_read. We |
| 283 | need to examine each section we are passed, check to see |
| 284 | if it is something we are interested in processing, and |
| 285 | if so, stash away some access information for the section. |
| 286 | |
| 287 | FIXME: The section names should not be hardwired strings (what |
| 288 | should they be? I don't think most object file formats have enough |
| 289 | section flags to specify what kind of debug section it is |
| 290 | -kingdon). */ |
| 291 | |
| 292 | static void |
| 293 | coff_locate_sections (ignore_abfd, sectp, csip) |
| 294 | bfd *ignore_abfd; |
| 295 | asection *sectp; |
| 296 | PTR csip; |
| 297 | { |
| 298 | register struct coff_symfile_info *csi; |
| 299 | |
| 300 | csi = (struct coff_symfile_info *) csip; |
| 301 | if (STREQ (sectp->name, ".stab")) |
| 302 | { |
| 303 | csi->stabsect = sectp; |
| 304 | } |
| 305 | else if (STREQ (sectp->name, ".stabstr")) |
| 306 | { |
| 307 | csi->stabstrsect = sectp; |
| 308 | } |
| 309 | else if (STREQ (sectp->name, ".stab.index")) |
| 310 | { |
| 311 | csi->stabindexsect = sectp; |
| 312 | } |
| 313 | } |
| 314 | |
| 315 | /* Look up a coff type-number index. Return the address of the slot |
| 316 | where the type for that index is stored. |
| 317 | The type-number is in INDEX. |
| 318 | |
| 319 | This can be used for finding the type associated with that index |
| 320 | or for associating a new type with the index. */ |
| 321 | |
| 322 | static struct type ** |
| 323 | coff_lookup_type (index) |
| 324 | register int index; |
| 325 | { |
| 326 | if (index >= type_vector_length) |
| 327 | { |
| 328 | int old_vector_length = type_vector_length; |
| 329 | |
| 330 | type_vector_length *= 2; |
| 331 | if (index /* is still */ >= type_vector_length) { |
| 332 | type_vector_length = index * 2; |
| 333 | } |
| 334 | type_vector = (struct type **) |
| 335 | xrealloc ((char *) type_vector, |
| 336 | type_vector_length * sizeof (struct type *)); |
| 337 | memset (&type_vector[old_vector_length], 0, |
| 338 | (type_vector_length - old_vector_length) * sizeof(struct type *)); |
| 339 | } |
| 340 | return &type_vector[index]; |
| 341 | } |
| 342 | |
| 343 | /* Make sure there is a type allocated for type number index |
| 344 | and return the type object. |
| 345 | This can create an empty (zeroed) type object. */ |
| 346 | |
| 347 | static struct type * |
| 348 | coff_alloc_type (index) |
| 349 | int index; |
| 350 | { |
| 351 | register struct type **type_addr = coff_lookup_type (index); |
| 352 | register struct type *type = *type_addr; |
| 353 | |
| 354 | /* If we are referring to a type not known at all yet, |
| 355 | allocate an empty type for it. |
| 356 | We will fill it in later if we find out how. */ |
| 357 | if (type == NULL) |
| 358 | { |
| 359 | type = alloc_type (current_objfile); |
| 360 | *type_addr = type; |
| 361 | } |
| 362 | return type; |
| 363 | } |
| 364 | \f |
| 365 | /* Record a line number entry for line LINE at address PC. |
| 366 | FIXME: Use record_line instead. */ |
| 367 | |
| 368 | static void |
| 369 | coff_record_line (line, pc) |
| 370 | int line; |
| 371 | CORE_ADDR pc; |
| 372 | { |
| 373 | struct linetable_entry *e; |
| 374 | /* Make sure line vector is big enough. */ |
| 375 | |
| 376 | if (line_vector_index + 2 >= line_vector_length) |
| 377 | { |
| 378 | line_vector_length *= 2; |
| 379 | line_vector = (struct linetable *) |
| 380 | xrealloc ((char *) line_vector, sizeof (struct linetable) |
| 381 | + (line_vector_length |
| 382 | * sizeof (struct linetable_entry))); |
| 383 | } |
| 384 | |
| 385 | e = line_vector->item + line_vector_index++; |
| 386 | e->line = line; e->pc = pc; |
| 387 | } |
| 388 | \f |
| 389 | /* Start a new symtab for a new source file. |
| 390 | This is called when a COFF ".file" symbol is seen; |
| 391 | it indicates the start of data for one original source file. */ |
| 392 | |
| 393 | static void |
| 394 | coff_start_symtab () |
| 395 | { |
| 396 | start_symtab ( |
| 397 | /* We fill in the filename later. start_symtab |
| 398 | puts this pointer into last_source file and in |
| 399 | coff_end_symtab we assume we can free() it. |
| 400 | FIXME: leaks memory. */ |
| 401 | savestring ("", 0), |
| 402 | /* We never know the directory name for COFF. */ |
| 403 | NULL, |
| 404 | /* The start address is irrelevant, since we set |
| 405 | last_source_start_addr in coff_end_symtab. */ |
| 406 | 0); |
| 407 | |
| 408 | /* Initialize the source file line number information for this file. */ |
| 409 | |
| 410 | if (line_vector) /* Unlikely, but maybe possible? */ |
| 411 | free ((PTR)line_vector); |
| 412 | line_vector_index = 0; |
| 413 | line_vector_length = 1000; |
| 414 | prev_line_number = -2; /* Force first line number to be explicit */ |
| 415 | line_vector = (struct linetable *) |
| 416 | xmalloc (sizeof (struct linetable) |
| 417 | + line_vector_length * sizeof (struct linetable_entry)); |
| 418 | } |
| 419 | |
| 420 | /* Save the vital information from when starting to read a file, |
| 421 | for use when closing off the current file. |
| 422 | NAME is the file name the symbols came from, START_ADDR is the first |
| 423 | text address for the file, and SIZE is the number of bytes of text. */ |
| 424 | |
| 425 | static void |
| 426 | complete_symtab (name, start_addr, size) |
| 427 | char *name; |
| 428 | CORE_ADDR start_addr; |
| 429 | unsigned int size; |
| 430 | { |
| 431 | last_source_file = savestring (name, strlen (name)); |
| 432 | cur_src_start_addr = start_addr; |
| 433 | cur_src_end_addr = start_addr + size; |
| 434 | |
| 435 | if (current_objfile -> ei.entry_point >= cur_src_start_addr && |
| 436 | current_objfile -> ei.entry_point < cur_src_end_addr) |
| 437 | { |
| 438 | current_objfile -> ei.entry_file_lowpc = cur_src_start_addr; |
| 439 | current_objfile -> ei.entry_file_highpc = cur_src_end_addr; |
| 440 | } |
| 441 | } |
| 442 | |
| 443 | /* Finish the symbol definitions for one main source file, |
| 444 | close off all the lexical contexts for that file |
| 445 | (creating struct block's for them), then make the |
| 446 | struct symtab for that file and put it in the list of all such. */ |
| 447 | |
| 448 | static void |
| 449 | coff_end_symtab (objfile) |
| 450 | struct objfile *objfile; |
| 451 | { |
| 452 | struct symtab *symtab; |
| 453 | |
| 454 | last_source_start_addr = cur_src_start_addr; |
| 455 | |
| 456 | /* For no good reason, this file stores the number of entries in a |
| 457 | separate variable instead of in line_vector->nitems. Fix it. */ |
| 458 | if (line_vector) |
| 459 | line_vector->nitems = line_vector_index; |
| 460 | |
| 461 | /* For COFF, we only have one subfile, so we can just look at |
| 462 | subfiles and not worry about there being other elements in the |
| 463 | chain. We fill in various fields now because we didn't know them |
| 464 | before (or because doing it now is simply an artifact of how this |
| 465 | file used to be written). */ |
| 466 | subfiles->line_vector = line_vector; |
| 467 | subfiles->name = last_source_file; |
| 468 | |
| 469 | /* sort_pending is needed for amdcoff, at least. |
| 470 | sort_linevec is needed for the SCO compiler. */ |
| 471 | symtab = end_symtab (cur_src_end_addr, 1, 1, objfile, 0); |
| 472 | |
| 473 | if (symtab != NULL) |
| 474 | free_named_symtabs (symtab->filename); |
| 475 | |
| 476 | /* Reinitialize for beginning of new file. */ |
| 477 | line_vector = 0; |
| 478 | line_vector_length = -1; |
| 479 | last_source_file = NULL; |
| 480 | } |
| 481 | \f |
| 482 | static void |
| 483 | record_minimal_symbol (name, address, type, objfile) |
| 484 | char *name; |
| 485 | CORE_ADDR address; |
| 486 | enum minimal_symbol_type type; |
| 487 | struct objfile *objfile; |
| 488 | { |
| 489 | /* We don't want TDESC entry points in the minimal symbol table */ |
| 490 | if (name[0] == '@') return; |
| 491 | |
| 492 | prim_record_minimal_symbol (savestring (name, strlen (name)), address, type, |
| 493 | objfile); |
| 494 | } |
| 495 | \f |
| 496 | /* coff_symfile_init () |
| 497 | is the coff-specific initialization routine for reading symbols. |
| 498 | It is passed a struct objfile which contains, among other things, |
| 499 | the BFD for the file whose symbols are being read, and a slot for |
| 500 | a pointer to "private data" which we fill with cookies and other |
| 501 | treats for coff_symfile_read (). |
| 502 | |
| 503 | We will only be called if this is a COFF or COFF-like file. |
| 504 | BFD handles figuring out the format of the file, and code in symtab.c |
| 505 | uses BFD's determination to vector to us. |
| 506 | |
| 507 | The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */ |
| 508 | |
| 509 | static int text_bfd_scnum; |
| 510 | |
| 511 | static void |
| 512 | coff_symfile_init (objfile) |
| 513 | struct objfile *objfile; |
| 514 | { |
| 515 | asection *section; |
| 516 | bfd *abfd = objfile->obfd; |
| 517 | |
| 518 | /* Allocate struct to keep track of stab reading. */ |
| 519 | objfile->sym_stab_info = (PTR) |
| 520 | xmmalloc (objfile -> md, sizeof (struct dbx_symfile_info)); |
| 521 | |
| 522 | memset ((PTR) objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info)); |
| 523 | |
| 524 | /* Allocate struct to keep track of the symfile */ |
| 525 | objfile -> sym_private = xmmalloc (objfile -> md, |
| 526 | sizeof (struct coff_symfile_info)); |
| 527 | |
| 528 | memset (objfile->sym_private, 0, sizeof (struct coff_symfile_info)); |
| 529 | |
| 530 | init_entry_point_info (objfile); |
| 531 | |
| 532 | /* Save the section number for the text section */ |
| 533 | section = bfd_get_section_by_name (abfd, ".text"); |
| 534 | if (section) |
| 535 | text_bfd_scnum = section->index; |
| 536 | else |
| 537 | text_bfd_scnum = -1; |
| 538 | } |
| 539 | |
| 540 | /* This function is called for every section; it finds the outer limits |
| 541 | of the line table (minimum and maximum file offset) so that the |
| 542 | mainline code can read the whole thing for efficiency. */ |
| 543 | |
| 544 | /* ARGSUSED */ |
| 545 | static void |
| 546 | find_linenos (abfd, asect, vpinfo) |
| 547 | bfd *abfd; |
| 548 | sec_ptr asect; |
| 549 | PTR vpinfo; |
| 550 | { |
| 551 | struct coff_symfile_info *info; |
| 552 | int size, count; |
| 553 | file_ptr offset, maxoff; |
| 554 | |
| 555 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ |
| 556 | count = asect->lineno_count; |
| 557 | /* End of warning */ |
| 558 | |
| 559 | if (count == 0) |
| 560 | return; |
| 561 | size = count * local_linesz; |
| 562 | |
| 563 | info = (struct coff_symfile_info *)vpinfo; |
| 564 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ |
| 565 | offset = asect->line_filepos; |
| 566 | /* End of warning */ |
| 567 | |
| 568 | if (offset < info->min_lineno_offset || info->min_lineno_offset == 0) |
| 569 | info->min_lineno_offset = offset; |
| 570 | |
| 571 | maxoff = offset + size; |
| 572 | if (maxoff > info->max_lineno_offset) |
| 573 | info->max_lineno_offset = maxoff; |
| 574 | } |
| 575 | |
| 576 | |
| 577 | /* The BFD for this file -- only good while we're actively reading |
| 578 | symbols into a psymtab or a symtab. */ |
| 579 | |
| 580 | static bfd *symfile_bfd; |
| 581 | |
| 582 | /* Read a symbol file, after initialization by coff_symfile_init. */ |
| 583 | /* FIXME! Addr and Mainline are not used yet -- this will not work for |
| 584 | shared libraries or add_file! */ |
| 585 | |
| 586 | /* ARGSUSED */ |
| 587 | static void |
| 588 | coff_symfile_read (objfile, section_offsets, mainline) |
| 589 | struct objfile *objfile; |
| 590 | struct section_offsets *section_offsets; |
| 591 | int mainline; |
| 592 | { |
| 593 | struct coff_symfile_info *info; |
| 594 | struct dbx_symfile_info *dbxinfo; |
| 595 | bfd *abfd = objfile->obfd; |
| 596 | coff_data_type *cdata = coff_data (abfd); |
| 597 | char *name = bfd_get_filename (abfd); |
| 598 | int desc; |
| 599 | register int val; |
| 600 | int num_symbols; |
| 601 | int symtab_offset; |
| 602 | int stringtab_offset; |
| 603 | struct cleanup *back_to; |
| 604 | int stabsize, stabstrsize; |
| 605 | |
| 606 | info = (struct coff_symfile_info *) objfile -> sym_private; |
| 607 | dbxinfo = (struct dbx_symfile_info *) objfile->sym_stab_info; |
| 608 | symfile_bfd = abfd; /* Kludge for swap routines */ |
| 609 | |
| 610 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ |
| 611 | desc = fileno ((GDB_FILE *)(abfd->iostream)); /* File descriptor */ |
| 612 | num_symbols = bfd_get_symcount (abfd); /* How many syms */ |
| 613 | symtab_offset = cdata->sym_filepos; /* Symbol table file offset */ |
| 614 | stringtab_offset = symtab_offset + /* String table file offset */ |
| 615 | num_symbols * cdata->local_symesz; |
| 616 | |
| 617 | /* Set a few file-statics that give us specific information about |
| 618 | the particular COFF file format we're reading. */ |
| 619 | local_linesz = cdata->local_linesz; |
| 620 | local_n_btmask = cdata->local_n_btmask; |
| 621 | local_n_btshft = cdata->local_n_btshft; |
| 622 | local_n_tmask = cdata->local_n_tmask; |
| 623 | local_n_tshift = cdata->local_n_tshift; |
| 624 | local_linesz = cdata->local_linesz; |
| 625 | local_symesz = cdata->local_symesz; |
| 626 | local_auxesz = cdata->local_auxesz; |
| 627 | |
| 628 | /* Allocate space for raw symbol and aux entries, based on their |
| 629 | space requirements as reported by BFD. */ |
| 630 | temp_sym = (char *) xmalloc |
| 631 | (cdata->local_symesz + cdata->local_auxesz); |
| 632 | temp_aux = temp_sym + cdata->local_symesz; |
| 633 | back_to = make_cleanup (free_current_contents, &temp_sym); |
| 634 | /* End of warning */ |
| 635 | |
| 636 | /* Read the line number table, all at once. */ |
| 637 | info->min_lineno_offset = 0; |
| 638 | info->max_lineno_offset = 0; |
| 639 | bfd_map_over_sections (abfd, find_linenos, (PTR) info); |
| 640 | |
| 641 | make_cleanup (free_linetab, 0); |
| 642 | val = init_lineno (desc, info->min_lineno_offset, |
| 643 | info->max_lineno_offset - info->min_lineno_offset); |
| 644 | if (val < 0) |
| 645 | error ("\"%s\": error reading line numbers\n", name); |
| 646 | |
| 647 | /* Now read the string table, all at once. */ |
| 648 | |
| 649 | make_cleanup (free_stringtab, 0); |
| 650 | val = init_stringtab (desc, stringtab_offset); |
| 651 | if (val < 0) |
| 652 | error ("\"%s\": can't get string table", name); |
| 653 | |
| 654 | init_minimal_symbol_collection (); |
| 655 | make_cleanup (discard_minimal_symbols, 0); |
| 656 | |
| 657 | /* Now that the executable file is positioned at symbol table, |
| 658 | process it and define symbols accordingly. */ |
| 659 | |
| 660 | read_coff_symtab ((long)symtab_offset, num_symbols, objfile); |
| 661 | |
| 662 | /* Sort symbols alphabetically within each block. */ |
| 663 | |
| 664 | { |
| 665 | struct symtab *s; |
| 666 | for (s = objfile -> symtabs; s != NULL; s = s -> next) |
| 667 | { |
| 668 | sort_symtab_syms (s); |
| 669 | } |
| 670 | } |
| 671 | |
| 672 | /* Install any minimal symbols that have been collected as the current |
| 673 | minimal symbols for this objfile. */ |
| 674 | |
| 675 | install_minimal_symbols (objfile); |
| 676 | |
| 677 | bfd_map_over_sections (abfd, coff_locate_sections, (PTR) info); |
| 678 | |
| 679 | if (info->stabsect) |
| 680 | { |
| 681 | /* FIXME: dubious. Why can't we use something normal like |
| 682 | bfd_get_section_contents? */ |
| 683 | fseek ((GDB_FILE *) abfd->iostream, abfd->where, 0); |
| 684 | |
| 685 | stabsize = bfd_section_size (abfd, info->stabsect); |
| 686 | stabstrsize = bfd_section_size (abfd, info->stabstrsect); |
| 687 | |
| 688 | coffstab_build_psymtabs (objfile, |
| 689 | section_offsets, |
| 690 | mainline, |
| 691 | info->stabsect->filepos, stabsize, |
| 692 | info->stabstrsect->filepos, stabstrsize); |
| 693 | } |
| 694 | |
| 695 | do_cleanups (back_to); |
| 696 | } |
| 697 | |
| 698 | static void |
| 699 | coff_new_init (ignore) |
| 700 | struct objfile *ignore; |
| 701 | { |
| 702 | } |
| 703 | |
| 704 | /* Perform any local cleanups required when we are done with a particular |
| 705 | objfile. I.E, we are in the process of discarding all symbol information |
| 706 | for an objfile, freeing up all memory held for it, and unlinking the |
| 707 | objfile struct from the global list of known objfiles. */ |
| 708 | |
| 709 | static void |
| 710 | coff_symfile_finish (objfile) |
| 711 | struct objfile *objfile; |
| 712 | { |
| 713 | if (objfile -> sym_private != NULL) |
| 714 | { |
| 715 | mfree (objfile -> md, objfile -> sym_private); |
| 716 | } |
| 717 | } |
| 718 | |
| 719 | \f |
| 720 | /* Given pointers to a symbol table in coff style exec file, |
| 721 | analyze them and create struct symtab's describing the symbols. |
| 722 | NSYMS is the number of symbols in the symbol table. |
| 723 | We read them one at a time using read_one_sym (). */ |
| 724 | |
| 725 | static void |
| 726 | read_coff_symtab (symtab_offset, nsyms, objfile) |
| 727 | long symtab_offset; |
| 728 | int nsyms; |
| 729 | struct objfile *objfile; |
| 730 | { |
| 731 | GDB_FILE *stream; |
| 732 | register struct context_stack *new; |
| 733 | struct coff_symbol coff_symbol; |
| 734 | register struct coff_symbol *cs = &coff_symbol; |
| 735 | static struct internal_syment main_sym; |
| 736 | static union internal_auxent main_aux; |
| 737 | struct coff_symbol fcn_cs_saved; |
| 738 | static struct internal_syment fcn_sym_saved; |
| 739 | static union internal_auxent fcn_aux_saved; |
| 740 | struct symtab *s; |
| 741 | |
| 742 | /* A .file is open. */ |
| 743 | int in_source_file = 0; |
| 744 | int next_file_symnum = -1; |
| 745 | |
| 746 | /* Name of the current file. */ |
| 747 | char *filestring = ""; |
| 748 | int depth = 0; |
| 749 | int fcn_first_line = 0; |
| 750 | int fcn_last_line = 0; |
| 751 | int fcn_start_addr = 0; |
| 752 | long fcn_line_ptr = 0; |
| 753 | int val; |
| 754 | |
| 755 | stream = bfd_cache_lookup(objfile->obfd); |
| 756 | if (!stream) |
| 757 | perror_with_name(objfile->name); |
| 758 | |
| 759 | /* Work around a stdio bug in SunOS4.1.1 (this makes me nervous.... |
| 760 | it's hard to know I've really worked around it. The fix should be |
| 761 | harmless, anyway). The symptom of the bug is that the first |
| 762 | fread (in read_one_sym), will (in my example) actually get data |
| 763 | from file offset 268, when the fseek was to 264 (and ftell shows |
| 764 | 264). This causes all hell to break loose. I was unable to |
| 765 | reproduce this on a short test program which operated on the same |
| 766 | file, performing (I think) the same sequence of operations. |
| 767 | |
| 768 | It stopped happening when I put in this rewind(). |
| 769 | |
| 770 | FIXME: Find out if this has been reported to Sun, whether it has |
| 771 | been fixed in a later release, etc. */ |
| 772 | |
| 773 | rewind (stream); |
| 774 | |
| 775 | /* Position to read the symbol table. */ |
| 776 | val = fseek (stream, (long)symtab_offset, 0); |
| 777 | if (val < 0) |
| 778 | perror_with_name (objfile->name); |
| 779 | |
| 780 | current_objfile = objfile; |
| 781 | nlist_stream_global = stream; |
| 782 | nlist_nsyms_global = nsyms; |
| 783 | last_source_file = NULL; |
| 784 | memset (opaque_type_chain, 0, sizeof opaque_type_chain); |
| 785 | |
| 786 | if (type_vector) /* Get rid of previous one */ |
| 787 | free ((PTR)type_vector); |
| 788 | type_vector_length = 160; |
| 789 | type_vector = (struct type **) |
| 790 | xmalloc (type_vector_length * sizeof (struct type *)); |
| 791 | memset (type_vector, 0, type_vector_length * sizeof (struct type *)); |
| 792 | |
| 793 | coff_start_symtab (); |
| 794 | |
| 795 | symnum = 0; |
| 796 | while (symnum < nsyms) |
| 797 | { |
| 798 | QUIT; /* Make this command interruptable. */ |
| 799 | read_one_sym (cs, &main_sym, &main_aux); |
| 800 | |
| 801 | #ifdef SEM |
| 802 | temp_sem_val = cs->c_name[0] << 24 | cs->c_name[1] << 16 | |
| 803 | cs->c_name[2] << 8 | cs->c_name[3]; |
| 804 | if (int_sem_val == temp_sem_val) |
| 805 | last_coffsem = (int) strtol (cs->c_name+4, (char **) NULL, 10); |
| 806 | #endif |
| 807 | |
| 808 | if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) |
| 809 | { |
| 810 | if (last_source_file) |
| 811 | coff_end_symtab (objfile); |
| 812 | |
| 813 | coff_start_symtab (); |
| 814 | complete_symtab ("_globals_", 0, 0); |
| 815 | /* done with all files, everything from here on out is globals */ |
| 816 | } |
| 817 | |
| 818 | /* Special case for file with type declarations only, no text. */ |
| 819 | if (!last_source_file && SDB_TYPE (cs->c_type) |
| 820 | && cs->c_secnum == N_DEBUG) |
| 821 | complete_symtab (filestring, 0, 0); |
| 822 | |
| 823 | /* Typedefs should not be treated as symbol definitions. */ |
| 824 | if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF) |
| 825 | { |
| 826 | /* Record all functions -- external and static -- in minsyms. */ |
| 827 | record_minimal_symbol (cs->c_name, cs->c_value, mst_text, objfile); |
| 828 | |
| 829 | fcn_line_ptr = main_aux.x_sym.x_fcnary.x_fcn.x_lnnoptr; |
| 830 | fcn_start_addr = cs->c_value; |
| 831 | fcn_cs_saved = *cs; |
| 832 | fcn_sym_saved = main_sym; |
| 833 | fcn_aux_saved = main_aux; |
| 834 | continue; |
| 835 | } |
| 836 | |
| 837 | switch (cs->c_sclass) |
| 838 | { |
| 839 | case C_EFCN: |
| 840 | case C_EXTDEF: |
| 841 | case C_ULABEL: |
| 842 | case C_USTATIC: |
| 843 | case C_LINE: |
| 844 | case C_ALIAS: |
| 845 | case C_HIDDEN: |
| 846 | complain (&bad_sclass_complaint, cs->c_name); |
| 847 | break; |
| 848 | |
| 849 | case C_FILE: |
| 850 | /* |
| 851 | * c_value field contains symnum of next .file entry in table |
| 852 | * or symnum of first global after last .file. |
| 853 | */ |
| 854 | next_file_symnum = cs->c_value; |
| 855 | if (cs->c_naux > 0) |
| 856 | filestring = coff_getfilename (&main_aux); |
| 857 | else |
| 858 | filestring = ""; |
| 859 | |
| 860 | /* |
| 861 | * Complete symbol table for last object file |
| 862 | * containing debugging information. |
| 863 | */ |
| 864 | if (last_source_file) |
| 865 | { |
| 866 | coff_end_symtab (objfile); |
| 867 | coff_start_symtab (); |
| 868 | } |
| 869 | in_source_file = 1; |
| 870 | break; |
| 871 | |
| 872 | case C_STAT: |
| 873 | if (cs->c_name[0] == '.') { |
| 874 | if (STREQ (cs->c_name, ".text")) { |
| 875 | /* FIXME: don't wire in ".text" as section name |
| 876 | or symbol name! */ |
| 877 | /* Check for in_source_file deals with case of |
| 878 | a file with debugging symbols |
| 879 | followed by a later file with no symbols. */ |
| 880 | if (in_source_file) |
| 881 | complete_symtab (filestring, cs->c_value, |
| 882 | main_aux.x_scn.x_scnlen); |
| 883 | in_source_file = 0; |
| 884 | } |
| 885 | /* flush rest of '.' symbols */ |
| 886 | break; |
| 887 | } |
| 888 | else if (!SDB_TYPE (cs->c_type) |
| 889 | && cs->c_name[0] == 'L' |
| 890 | && (strncmp (cs->c_name, "LI%", 3) == 0 |
| 891 | || strncmp (cs->c_name, "LF%", 3) == 0 |
| 892 | || strncmp (cs->c_name,"LC%",3) == 0 |
| 893 | || strncmp (cs->c_name,"LP%",3) == 0 |
| 894 | || strncmp (cs->c_name,"LPB%",4) == 0 |
| 895 | || strncmp (cs->c_name,"LBB%",4) == 0 |
| 896 | || strncmp (cs->c_name,"LBE%",4) == 0 |
| 897 | || strncmp (cs->c_name,"LPBX%",5) == 0)) |
| 898 | /* At least on a 3b1, gcc generates swbeg and string labels |
| 899 | that look like this. Ignore them. */ |
| 900 | break; |
| 901 | /* fall in for static symbols that don't start with '.' */ |
| 902 | case C_EXT: |
| 903 | /* Record external symbols in minsyms if we don't have debug |
| 904 | info for them. FIXME, this is probably the wrong thing |
| 905 | to do. Why don't we record them even if we do have |
| 906 | debug symbol info? What really belongs in the minsyms |
| 907 | anyway? Fred!?? */ |
| 908 | if (!SDB_TYPE (cs->c_type)) { |
| 909 | /* FIXME: This is BOGUS Will Robinson! |
| 910 | Coff should provide the SEC_CODE flag for executable sections, |
| 911 | then if we could look up sections by section number we |
| 912 | could see if the flags indicate SEC_CODE. If so, then |
| 913 | record this symbol as a function in the minimal symbol table. |
| 914 | But why are absolute syms recorded as functions, anyway? */ |
| 915 | if (cs->c_secnum <= text_bfd_scnum+1) {/* text or abs */ |
| 916 | record_minimal_symbol (cs->c_name, cs->c_value, |
| 917 | mst_text, objfile); |
| 918 | break; |
| 919 | } else { |
| 920 | record_minimal_symbol (cs->c_name, cs->c_value, |
| 921 | mst_data, objfile); |
| 922 | break; |
| 923 | } |
| 924 | } |
| 925 | process_coff_symbol (cs, &main_aux, objfile); |
| 926 | break; |
| 927 | |
| 928 | case C_FCN: |
| 929 | if (STREQ (cs->c_name, ".bf")) |
| 930 | { |
| 931 | within_function = 1; |
| 932 | |
| 933 | /* value contains address of first non-init type code */ |
| 934 | /* main_aux.x_sym.x_misc.x_lnsz.x_lnno |
| 935 | contains line number of '{' } */ |
| 936 | if (cs->c_naux != 1) |
| 937 | complain (&bf_no_aux_complaint, cs->c_symnum); |
| 938 | fcn_first_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; |
| 939 | |
| 940 | /* Might want to check that locals are 0 and |
| 941 | context_stack_depth is zero, and complain if not. */ |
| 942 | |
| 943 | depth = 0; |
| 944 | new = push_context (depth, fcn_start_addr); |
| 945 | fcn_cs_saved.c_name = getsymname (&fcn_sym_saved); |
| 946 | new->name = process_coff_symbol (&fcn_cs_saved, |
| 947 | &fcn_aux_saved, objfile); |
| 948 | } |
| 949 | else if (STREQ (cs->c_name, ".ef")) |
| 950 | { |
| 951 | /* the value of .ef is the address of epilogue code; |
| 952 | not useful for gdb. */ |
| 953 | /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno |
| 954 | contains number of lines to '}' */ |
| 955 | new = pop_context (); |
| 956 | /* Stack must be empty now. */ |
| 957 | if (context_stack_depth > 0 || new == NULL) |
| 958 | { |
| 959 | complain (&ef_complaint, cs->c_symnum); |
| 960 | within_function = 0; |
| 961 | break; |
| 962 | } |
| 963 | if (cs->c_naux != 1) |
| 964 | { |
| 965 | complain (&ef_no_aux_complaint, cs->c_symnum); |
| 966 | fcn_last_line = 0x7FFFFFFF; |
| 967 | } |
| 968 | else |
| 969 | { |
| 970 | fcn_last_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; |
| 971 | } |
| 972 | enter_linenos (fcn_line_ptr, fcn_first_line, fcn_last_line); |
| 973 | |
| 974 | finish_block (new->name, &local_symbols, new->old_blocks, |
| 975 | new->start_addr, |
| 976 | #if defined (FUNCTION_EPILOGUE_SIZE) |
| 977 | /* This macro should be defined only on |
| 978 | machines where the |
| 979 | fcn_aux_saved.x_sym.x_misc.x_fsize |
| 980 | field is always zero. |
| 981 | So use the .bf record information that |
| 982 | points to the epilogue and add the size |
| 983 | of the epilogue. */ |
| 984 | cs->c_value + FUNCTION_EPILOGUE_SIZE, |
| 985 | #else |
| 986 | fcn_cs_saved.c_value + |
| 987 | fcn_aux_saved.x_sym.x_misc.x_fsize, |
| 988 | #endif |
| 989 | objfile |
| 990 | ); |
| 991 | within_function = 0; |
| 992 | } |
| 993 | break; |
| 994 | |
| 995 | case C_BLOCK: |
| 996 | if (STREQ (cs->c_name, ".bb")) |
| 997 | { |
| 998 | push_context (++depth, cs->c_value); |
| 999 | } |
| 1000 | else if (STREQ (cs->c_name, ".eb")) |
| 1001 | { |
| 1002 | new = pop_context (); |
| 1003 | if (depth-- != new->depth) |
| 1004 | { |
| 1005 | complain (&eb_complaint, symnum); |
| 1006 | break; |
| 1007 | } |
| 1008 | if (local_symbols && context_stack_depth > 0) |
| 1009 | { |
| 1010 | /* Make a block for the local symbols within. */ |
| 1011 | finish_block (0, &local_symbols, new->old_blocks, |
| 1012 | new->start_addr, cs->c_value, objfile); |
| 1013 | } |
| 1014 | /* Now pop locals of block just finished. */ |
| 1015 | local_symbols = new->locals; |
| 1016 | } |
| 1017 | break; |
| 1018 | |
| 1019 | default: |
| 1020 | process_coff_symbol (cs, &main_aux, objfile); |
| 1021 | break; |
| 1022 | } |
| 1023 | } |
| 1024 | |
| 1025 | if (last_source_file) |
| 1026 | coff_end_symtab (objfile); |
| 1027 | |
| 1028 | /* Patch up any opaque types (references to types that are not defined |
| 1029 | in the file where they are referenced, e.g. "struct foo *bar"). */ |
| 1030 | ALL_OBJFILE_SYMTABS (objfile, s) |
| 1031 | patch_opaque_types (s); |
| 1032 | |
| 1033 | current_objfile = NULL; |
| 1034 | } |
| 1035 | \f |
| 1036 | /* Routines for reading headers and symbols from executable. */ |
| 1037 | |
| 1038 | #ifdef FIXME |
| 1039 | /* Move these XXXMAGIC symbol defns into BFD! */ |
| 1040 | |
| 1041 | /* Read COFF file header, check magic number, |
| 1042 | and return number of symbols. */ |
| 1043 | read_file_hdr (chan, file_hdr) |
| 1044 | int chan; |
| 1045 | FILHDR *file_hdr; |
| 1046 | { |
| 1047 | lseek (chan, 0L, 0); |
| 1048 | if (myread (chan, (char *)file_hdr, FILHSZ) < 0) |
| 1049 | return -1; |
| 1050 | |
| 1051 | switch (file_hdr->f_magic) |
| 1052 | { |
| 1053 | #ifdef MC68MAGIC |
| 1054 | case MC68MAGIC: |
| 1055 | #endif |
| 1056 | #ifdef NS32GMAGIC |
| 1057 | case NS32GMAGIC: |
| 1058 | case NS32SMAGIC: |
| 1059 | #endif |
| 1060 | #ifdef I386MAGIC |
| 1061 | case I386MAGIC: |
| 1062 | #endif |
| 1063 | #ifdef CLIPPERMAGIC |
| 1064 | case CLIPPERMAGIC: |
| 1065 | #endif |
| 1066 | #if defined (MC68KWRMAGIC) \ |
| 1067 | && (!defined (MC68MAGIC) || MC68KWRMAGIC != MC68MAGIC) |
| 1068 | case MC68KWRMAGIC: |
| 1069 | #endif |
| 1070 | #ifdef MC68KROMAGIC |
| 1071 | case MC68KROMAGIC: |
| 1072 | case MC68KPGMAGIC: |
| 1073 | #endif |
| 1074 | #ifdef MC88DGMAGIC |
| 1075 | case MC88DGMAGIC: |
| 1076 | #endif |
| 1077 | #ifdef MC88MAGIC |
| 1078 | case MC88MAGIC: |
| 1079 | #endif |
| 1080 | #ifdef I960ROMAGIC |
| 1081 | case I960ROMAGIC: /* Intel 960 */ |
| 1082 | #endif |
| 1083 | #ifdef I960RWMAGIC |
| 1084 | case I960RWMAGIC: /* Intel 960 */ |
| 1085 | #endif |
| 1086 | return file_hdr->f_nsyms; |
| 1087 | |
| 1088 | default: |
| 1089 | #ifdef BADMAG |
| 1090 | if (BADMAG(file_hdr)) |
| 1091 | return -1; |
| 1092 | else |
| 1093 | return file_hdr->f_nsyms; |
| 1094 | #else |
| 1095 | return -1; |
| 1096 | #endif |
| 1097 | } |
| 1098 | } |
| 1099 | #endif |
| 1100 | |
| 1101 | /* Read the next symbol, swap it, and return it in both internal_syment |
| 1102 | form, and coff_symbol form. Also return its first auxent, if any, |
| 1103 | in internal_auxent form, and skip any other auxents. */ |
| 1104 | |
| 1105 | static void |
| 1106 | read_one_sym (cs, sym, aux) |
| 1107 | register struct coff_symbol *cs; |
| 1108 | register struct internal_syment *sym; |
| 1109 | register union internal_auxent *aux; |
| 1110 | { |
| 1111 | int i; |
| 1112 | |
| 1113 | cs->c_symnum = symnum; |
| 1114 | fread (temp_sym, local_symesz, 1, nlist_stream_global); |
| 1115 | bfd_coff_swap_sym_in (symfile_bfd, temp_sym, (char *)sym); |
| 1116 | cs->c_naux = sym->n_numaux & 0xff; |
| 1117 | if (cs->c_naux >= 1) |
| 1118 | { |
| 1119 | fread (temp_aux, local_auxesz, 1, nlist_stream_global); |
| 1120 | bfd_coff_swap_aux_in (symfile_bfd, temp_aux, sym->n_type, sym->n_sclass, |
| 1121 | 0, cs->c_naux, (char *)aux); |
| 1122 | /* If more than one aux entry, read past it (only the first aux |
| 1123 | is important). */ |
| 1124 | for (i = 1; i < cs->c_naux; i++) |
| 1125 | fread (temp_aux, local_auxesz, 1, nlist_stream_global); |
| 1126 | } |
| 1127 | cs->c_name = getsymname (sym); |
| 1128 | cs->c_value = sym->n_value; |
| 1129 | cs->c_sclass = (sym->n_sclass & 0xff); |
| 1130 | cs->c_secnum = sym->n_scnum; |
| 1131 | cs->c_type = (unsigned) sym->n_type; |
| 1132 | if (!SDB_TYPE (cs->c_type)) |
| 1133 | cs->c_type = 0; |
| 1134 | |
| 1135 | symnum += 1 + cs->c_naux; |
| 1136 | } |
| 1137 | \f |
| 1138 | /* Support for string table handling */ |
| 1139 | |
| 1140 | static char *stringtab = NULL; |
| 1141 | |
| 1142 | static int |
| 1143 | init_stringtab (chan, offset) |
| 1144 | int chan; |
| 1145 | long offset; |
| 1146 | { |
| 1147 | long length; |
| 1148 | int val; |
| 1149 | unsigned char lengthbuf[4]; |
| 1150 | |
| 1151 | free_stringtab (); |
| 1152 | |
| 1153 | if (lseek (chan, offset, 0) < 0) |
| 1154 | return -1; |
| 1155 | |
| 1156 | val = myread (chan, (char *)lengthbuf, sizeof lengthbuf); |
| 1157 | length = bfd_h_get_32 (symfile_bfd, lengthbuf); |
| 1158 | |
| 1159 | /* If no string table is needed, then the file may end immediately |
| 1160 | after the symbols. Just return with `stringtab' set to null. */ |
| 1161 | if (val != sizeof lengthbuf || length < sizeof lengthbuf) |
| 1162 | return 0; |
| 1163 | |
| 1164 | stringtab = (char *) xmalloc (length); |
| 1165 | memcpy (stringtab, &length, sizeof length); |
| 1166 | if (length == sizeof length) /* Empty table -- just the count */ |
| 1167 | return 0; |
| 1168 | |
| 1169 | val = myread (chan, stringtab + sizeof lengthbuf, length - sizeof lengthbuf); |
| 1170 | if (val != length - sizeof lengthbuf || stringtab[length - 1] != '\0') |
| 1171 | return -1; |
| 1172 | |
| 1173 | return 0; |
| 1174 | } |
| 1175 | |
| 1176 | static void |
| 1177 | free_stringtab () |
| 1178 | { |
| 1179 | if (stringtab) |
| 1180 | free (stringtab); |
| 1181 | stringtab = NULL; |
| 1182 | } |
| 1183 | |
| 1184 | static char * |
| 1185 | getsymname (symbol_entry) |
| 1186 | struct internal_syment *symbol_entry; |
| 1187 | { |
| 1188 | static char buffer[SYMNMLEN+1]; |
| 1189 | char *result; |
| 1190 | |
| 1191 | if (symbol_entry->_n._n_n._n_zeroes == 0) |
| 1192 | { |
| 1193 | result = stringtab + symbol_entry->_n._n_n._n_offset; |
| 1194 | } |
| 1195 | else |
| 1196 | { |
| 1197 | strncpy (buffer, symbol_entry->_n._n_name, SYMNMLEN); |
| 1198 | buffer[SYMNMLEN] = '\0'; |
| 1199 | result = buffer; |
| 1200 | } |
| 1201 | return result; |
| 1202 | } |
| 1203 | |
| 1204 | /* Extract the file name from the aux entry of a C_FILE symbol. Return |
| 1205 | only the last component of the name. Result is in static storage and |
| 1206 | is only good for temporary use. */ |
| 1207 | |
| 1208 | char * |
| 1209 | coff_getfilename (aux_entry) |
| 1210 | union internal_auxent *aux_entry; |
| 1211 | { |
| 1212 | static char buffer[BUFSIZ]; |
| 1213 | register char *temp; |
| 1214 | char *result; |
| 1215 | |
| 1216 | if (aux_entry->x_file.x_n.x_zeroes == 0) |
| 1217 | strcpy (buffer, stringtab + aux_entry->x_file.x_n.x_offset); |
| 1218 | else |
| 1219 | { |
| 1220 | strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN); |
| 1221 | buffer[FILNMLEN] = '\0'; |
| 1222 | } |
| 1223 | result = buffer; |
| 1224 | if ((temp = strrchr (result, '/')) != NULL) |
| 1225 | result = temp + 1; |
| 1226 | return (result); |
| 1227 | } |
| 1228 | \f |
| 1229 | /* Support for line number handling */ |
| 1230 | static char *linetab = NULL; |
| 1231 | static long linetab_offset; |
| 1232 | static unsigned long linetab_size; |
| 1233 | |
| 1234 | /* Read in all the line numbers for fast lookups later. Leave them in |
| 1235 | external (unswapped) format in memory; we'll swap them as we enter |
| 1236 | them into GDB's data structures. */ |
| 1237 | |
| 1238 | static int |
| 1239 | init_lineno (chan, offset, size) |
| 1240 | int chan; |
| 1241 | long offset; |
| 1242 | int size; |
| 1243 | { |
| 1244 | int val; |
| 1245 | |
| 1246 | linetab_offset = offset; |
| 1247 | linetab_size = size; |
| 1248 | |
| 1249 | free_linetab(); |
| 1250 | |
| 1251 | if (size == 0) |
| 1252 | return 0; |
| 1253 | |
| 1254 | if (lseek (chan, offset, 0) < 0) |
| 1255 | return -1; |
| 1256 | |
| 1257 | /* Allocate the desired table, plus a sentinel */ |
| 1258 | linetab = (char *) xmalloc (size + local_linesz); |
| 1259 | |
| 1260 | val = myread (chan, linetab, size); |
| 1261 | if (val != size) |
| 1262 | return -1; |
| 1263 | |
| 1264 | /* Terminate it with an all-zero sentinel record */ |
| 1265 | memset (linetab + size, 0, local_linesz); |
| 1266 | |
| 1267 | return 0; |
| 1268 | } |
| 1269 | |
| 1270 | static void |
| 1271 | free_linetab () |
| 1272 | { |
| 1273 | if (linetab) |
| 1274 | free (linetab); |
| 1275 | linetab = NULL; |
| 1276 | } |
| 1277 | |
| 1278 | #if !defined (L_LNNO32) |
| 1279 | #define L_LNNO32(lp) ((lp)->l_lnno) |
| 1280 | #endif |
| 1281 | |
| 1282 | static void |
| 1283 | enter_linenos (file_offset, first_line, last_line) |
| 1284 | long file_offset; |
| 1285 | register int first_line; |
| 1286 | register int last_line; |
| 1287 | { |
| 1288 | register char *rawptr; |
| 1289 | struct internal_lineno lptr; |
| 1290 | |
| 1291 | if (file_offset < linetab_offset) |
| 1292 | { |
| 1293 | complain (&lineno_complaint, file_offset); |
| 1294 | if (file_offset > linetab_size) /* Too big to be an offset? */ |
| 1295 | return; |
| 1296 | file_offset += linetab_offset; /* Try reading at that linetab offset */ |
| 1297 | } |
| 1298 | |
| 1299 | rawptr = &linetab[file_offset - linetab_offset]; |
| 1300 | |
| 1301 | /* skip first line entry for each function */ |
| 1302 | rawptr += local_linesz; |
| 1303 | /* line numbers start at one for the first line of the function */ |
| 1304 | first_line--; |
| 1305 | |
| 1306 | for (;;) { |
| 1307 | bfd_coff_swap_lineno_in (symfile_bfd, rawptr, &lptr); |
| 1308 | rawptr += local_linesz; |
| 1309 | /* The next function, or the sentinel, will have L_LNNO32 zero; we exit. */ |
| 1310 | if (L_LNNO32 (&lptr) && L_LNNO32 (&lptr) <= last_line) |
| 1311 | coff_record_line (first_line + L_LNNO32 (&lptr), lptr.l_addr.l_paddr); |
| 1312 | else |
| 1313 | break; |
| 1314 | } |
| 1315 | } |
| 1316 | \f |
| 1317 | static void |
| 1318 | patch_type (type, real_type) |
| 1319 | struct type *type; |
| 1320 | struct type *real_type; |
| 1321 | { |
| 1322 | register struct type *target = TYPE_TARGET_TYPE (type); |
| 1323 | register struct type *real_target = TYPE_TARGET_TYPE (real_type); |
| 1324 | int field_size = TYPE_NFIELDS (real_target) * sizeof (struct field); |
| 1325 | |
| 1326 | TYPE_LENGTH (target) = TYPE_LENGTH (real_target); |
| 1327 | TYPE_NFIELDS (target) = TYPE_NFIELDS (real_target); |
| 1328 | TYPE_FIELDS (target) = (struct field *) TYPE_ALLOC (target, field_size); |
| 1329 | |
| 1330 | memcpy (TYPE_FIELDS (target), TYPE_FIELDS (real_target), field_size); |
| 1331 | |
| 1332 | if (TYPE_NAME (real_target)) |
| 1333 | { |
| 1334 | if (TYPE_NAME (target)) |
| 1335 | free (TYPE_NAME (target)); |
| 1336 | TYPE_NAME (target) = concat (TYPE_NAME (real_target), NULL); |
| 1337 | } |
| 1338 | } |
| 1339 | |
| 1340 | /* Patch up all appropriate typedef symbols in the opaque_type_chains |
| 1341 | so that they can be used to print out opaque data structures properly. */ |
| 1342 | |
| 1343 | static void |
| 1344 | patch_opaque_types (s) |
| 1345 | struct symtab *s; |
| 1346 | { |
| 1347 | register struct block *b; |
| 1348 | register int i; |
| 1349 | register struct symbol *real_sym; |
| 1350 | |
| 1351 | /* Go through the per-file symbols only */ |
| 1352 | b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK); |
| 1353 | for (i = BLOCK_NSYMS (b) - 1; i >= 0; i--) |
| 1354 | { |
| 1355 | /* Find completed typedefs to use to fix opaque ones. |
| 1356 | Remove syms from the chain when their types are stored, |
| 1357 | but search the whole chain, as there may be several syms |
| 1358 | from different files with the same name. */ |
| 1359 | real_sym = BLOCK_SYM (b, i); |
| 1360 | if (SYMBOL_CLASS (real_sym) == LOC_TYPEDEF && |
| 1361 | SYMBOL_NAMESPACE (real_sym) == VAR_NAMESPACE && |
| 1362 | TYPE_CODE (SYMBOL_TYPE (real_sym)) == TYPE_CODE_PTR && |
| 1363 | TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym))) != 0) |
| 1364 | { |
| 1365 | register char *name = SYMBOL_NAME (real_sym); |
| 1366 | register int hash = hashname (name); |
| 1367 | register struct symbol *sym, *prev; |
| 1368 | |
| 1369 | prev = 0; |
| 1370 | for (sym = opaque_type_chain[hash]; sym;) |
| 1371 | { |
| 1372 | if (name[0] == SYMBOL_NAME (sym)[0] && |
| 1373 | STREQ (name + 1, SYMBOL_NAME (sym) + 1)) |
| 1374 | { |
| 1375 | if (prev) |
| 1376 | { |
| 1377 | SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym); |
| 1378 | } |
| 1379 | else |
| 1380 | { |
| 1381 | opaque_type_chain[hash] = SYMBOL_VALUE_CHAIN (sym); |
| 1382 | } |
| 1383 | |
| 1384 | patch_type (SYMBOL_TYPE (sym), SYMBOL_TYPE (real_sym)); |
| 1385 | |
| 1386 | if (prev) |
| 1387 | { |
| 1388 | sym = SYMBOL_VALUE_CHAIN (prev); |
| 1389 | } |
| 1390 | else |
| 1391 | { |
| 1392 | sym = opaque_type_chain[hash]; |
| 1393 | } |
| 1394 | } |
| 1395 | else |
| 1396 | { |
| 1397 | prev = sym; |
| 1398 | sym = SYMBOL_VALUE_CHAIN (sym); |
| 1399 | } |
| 1400 | } |
| 1401 | } |
| 1402 | } |
| 1403 | } |
| 1404 | \f |
| 1405 | static struct symbol * |
| 1406 | process_coff_symbol (cs, aux, objfile) |
| 1407 | register struct coff_symbol *cs; |
| 1408 | register union internal_auxent *aux; |
| 1409 | struct objfile *objfile; |
| 1410 | { |
| 1411 | register struct symbol *sym |
| 1412 | = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, |
| 1413 | sizeof (struct symbol)); |
| 1414 | char *name; |
| 1415 | struct type *temptype; |
| 1416 | |
| 1417 | memset (sym, 0, sizeof (struct symbol)); |
| 1418 | name = cs->c_name; |
| 1419 | name = EXTERNAL_NAME (name, objfile->obfd); |
| 1420 | SYMBOL_NAME (sym) = obstack_copy0 (&objfile->symbol_obstack, name, |
| 1421 | strlen (name)); |
| 1422 | |
| 1423 | /* default assumptions */ |
| 1424 | SYMBOL_VALUE (sym) = cs->c_value; |
| 1425 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
| 1426 | |
| 1427 | if (ISFCN (cs->c_type)) |
| 1428 | { |
| 1429 | #if 0 |
| 1430 | /* FIXME: This has NOT been tested. The DBX version has.. */ |
| 1431 | /* Generate a template for the type of this function. The |
| 1432 | types of the arguments will be added as we read the symbol |
| 1433 | table. */ |
| 1434 | struct type *new = (struct type *) |
| 1435 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct type)); |
| 1436 | |
| 1437 | memcpy (new, lookup_function_type (decode_function_type (cs, cs->c_type, aux)), |
| 1438 | sizeof(struct type)); |
| 1439 | SYMBOL_TYPE (sym) = new; |
| 1440 | in_function_type = SYMBOL_TYPE(sym); |
| 1441 | #else |
| 1442 | SYMBOL_TYPE(sym) = |
| 1443 | lookup_function_type (decode_function_type (cs, cs->c_type, aux)); |
| 1444 | #endif |
| 1445 | |
| 1446 | SYMBOL_CLASS (sym) = LOC_BLOCK; |
| 1447 | if (cs->c_sclass == C_STAT) |
| 1448 | add_symbol_to_list (sym, &file_symbols); |
| 1449 | else if (cs->c_sclass == C_EXT) |
| 1450 | add_symbol_to_list (sym, &global_symbols); |
| 1451 | } |
| 1452 | else |
| 1453 | { |
| 1454 | SYMBOL_TYPE (sym) = decode_type (cs, cs->c_type, aux); |
| 1455 | switch (cs->c_sclass) |
| 1456 | { |
| 1457 | case C_NULL: |
| 1458 | break; |
| 1459 | |
| 1460 | case C_AUTO: |
| 1461 | SYMBOL_CLASS (sym) = LOC_LOCAL; |
| 1462 | add_symbol_to_list (sym, &local_symbols); |
| 1463 | break; |
| 1464 | |
| 1465 | case C_EXT: |
| 1466 | SYMBOL_CLASS (sym) = LOC_STATIC; |
| 1467 | SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; |
| 1468 | add_symbol_to_list (sym, &global_symbols); |
| 1469 | break; |
| 1470 | |
| 1471 | case C_STAT: |
| 1472 | SYMBOL_CLASS (sym) = LOC_STATIC; |
| 1473 | SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; |
| 1474 | if (within_function) { |
| 1475 | /* Static symbol of local scope */ |
| 1476 | add_symbol_to_list (sym, &local_symbols); |
| 1477 | } |
| 1478 | else { |
| 1479 | /* Static symbol at top level of file */ |
| 1480 | add_symbol_to_list (sym, &file_symbols); |
| 1481 | } |
| 1482 | break; |
| 1483 | |
| 1484 | #ifdef C_GLBLREG /* AMD coff */ |
| 1485 | case C_GLBLREG: |
| 1486 | #endif |
| 1487 | case C_REG: |
| 1488 | SYMBOL_CLASS (sym) = LOC_REGISTER; |
| 1489 | SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM(cs->c_value); |
| 1490 | add_symbol_to_list (sym, &local_symbols); |
| 1491 | break; |
| 1492 | |
| 1493 | case C_LABEL: |
| 1494 | break; |
| 1495 | |
| 1496 | case C_ARG: |
| 1497 | SYMBOL_CLASS (sym) = LOC_ARG; |
| 1498 | #if 0 |
| 1499 | /* FIXME: This has not been tested. */ |
| 1500 | /* Add parameter to function. */ |
| 1501 | add_param_to_type(&in_function_type,sym); |
| 1502 | #endif |
| 1503 | add_symbol_to_list (sym, &local_symbols); |
| 1504 | #if !defined (BELIEVE_PCC_PROMOTION) && (TARGET_BYTE_ORDER == BIG_ENDIAN) |
| 1505 | /* If PCC says a parameter is a short or a char, |
| 1506 | aligned on an int boundary, realign it to the "little end" |
| 1507 | of the int. */ |
| 1508 | temptype = lookup_fundamental_type (current_objfile, FT_INTEGER); |
| 1509 | if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype) |
| 1510 | && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT |
| 1511 | && 0 == SYMBOL_VALUE (sym) % TYPE_LENGTH (temptype)) |
| 1512 | { |
| 1513 | SYMBOL_VALUE (sym) += TYPE_LENGTH (temptype) |
| 1514 | - TYPE_LENGTH (SYMBOL_TYPE (sym)); |
| 1515 | } |
| 1516 | #endif |
| 1517 | break; |
| 1518 | |
| 1519 | case C_REGPARM: |
| 1520 | SYMBOL_CLASS (sym) = LOC_REGPARM; |
| 1521 | SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM(cs->c_value); |
| 1522 | add_symbol_to_list (sym, &local_symbols); |
| 1523 | #if !defined (BELIEVE_PCC_PROMOTION) |
| 1524 | /* FIXME: This should retain the current type, since it's just |
| 1525 | a register value. gnu@adobe, 26Feb93 */ |
| 1526 | /* If PCC says a parameter is a short or a char, |
| 1527 | it is really an int. */ |
| 1528 | temptype = lookup_fundamental_type (current_objfile, FT_INTEGER); |
| 1529 | if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype) |
| 1530 | && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT) |
| 1531 | { |
| 1532 | SYMBOL_TYPE (sym) = TYPE_UNSIGNED (SYMBOL_TYPE (sym)) |
| 1533 | ? lookup_fundamental_type (current_objfile, |
| 1534 | FT_UNSIGNED_INTEGER) |
| 1535 | : temptype; |
| 1536 | } |
| 1537 | #endif |
| 1538 | break; |
| 1539 | |
| 1540 | case C_TPDEF: |
| 1541 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; |
| 1542 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
| 1543 | |
| 1544 | /* If type has no name, give it one */ |
| 1545 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) |
| 1546 | TYPE_NAME (SYMBOL_TYPE (sym)) = concat (SYMBOL_NAME (sym), NULL); |
| 1547 | |
| 1548 | /* Keep track of any type which points to empty structured type, |
| 1549 | so it can be filled from a definition from another file. A |
| 1550 | simple forward reference (TYPE_CODE_UNDEF) is not an |
| 1551 | empty structured type, though; the forward references |
| 1552 | work themselves out via the magic of coff_lookup_type. */ |
| 1553 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR && |
| 1554 | TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) == 0 && |
| 1555 | TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) != |
| 1556 | TYPE_CODE_UNDEF) |
| 1557 | { |
| 1558 | register int i = hashname (SYMBOL_NAME (sym)); |
| 1559 | |
| 1560 | SYMBOL_VALUE_CHAIN (sym) = opaque_type_chain[i]; |
| 1561 | opaque_type_chain[i] = sym; |
| 1562 | } |
| 1563 | add_symbol_to_list (sym, &file_symbols); |
| 1564 | break; |
| 1565 | |
| 1566 | case C_STRTAG: |
| 1567 | case C_UNTAG: |
| 1568 | case C_ENTAG: |
| 1569 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; |
| 1570 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; |
| 1571 | |
| 1572 | /* Some compilers try to be helpful by inventing "fake" |
| 1573 | names for anonymous enums, structures, and unions, like |
| 1574 | "~0fake" or ".0fake". Thanks, but no thanks... */ |
| 1575 | if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0) |
| 1576 | if (SYMBOL_NAME(sym) != NULL |
| 1577 | && *SYMBOL_NAME(sym) != '~' |
| 1578 | && *SYMBOL_NAME(sym) != '.') |
| 1579 | TYPE_TAG_NAME (SYMBOL_TYPE (sym)) = |
| 1580 | concat (SYMBOL_NAME (sym), NULL); |
| 1581 | |
| 1582 | add_symbol_to_list (sym, &file_symbols); |
| 1583 | break; |
| 1584 | |
| 1585 | default: |
| 1586 | break; |
| 1587 | } |
| 1588 | } |
| 1589 | return sym; |
| 1590 | } |
| 1591 | \f |
| 1592 | /* Decode a coff type specifier; |
| 1593 | return the type that is meant. */ |
| 1594 | |
| 1595 | static |
| 1596 | struct type * |
| 1597 | decode_type (cs, c_type, aux) |
| 1598 | register struct coff_symbol *cs; |
| 1599 | unsigned int c_type; |
| 1600 | register union internal_auxent *aux; |
| 1601 | { |
| 1602 | register struct type *type = 0; |
| 1603 | unsigned int new_c_type; |
| 1604 | |
| 1605 | if (c_type & ~N_BTMASK) |
| 1606 | { |
| 1607 | new_c_type = DECREF (c_type); |
| 1608 | if (ISPTR (c_type)) |
| 1609 | { |
| 1610 | type = decode_type (cs, new_c_type, aux); |
| 1611 | type = lookup_pointer_type (type); |
| 1612 | } |
| 1613 | else if (ISFCN (c_type)) |
| 1614 | { |
| 1615 | type = decode_type (cs, new_c_type, aux); |
| 1616 | type = lookup_function_type (type); |
| 1617 | } |
| 1618 | else if (ISARY (c_type)) |
| 1619 | { |
| 1620 | int i, n; |
| 1621 | register unsigned short *dim; |
| 1622 | struct type *base_type, *index_type, *range_type; |
| 1623 | |
| 1624 | /* Define an array type. */ |
| 1625 | /* auxent refers to array, not base type */ |
| 1626 | if (aux->x_sym.x_tagndx.l == 0) |
| 1627 | cs->c_naux = 0; |
| 1628 | |
| 1629 | /* shift the indices down */ |
| 1630 | dim = &aux->x_sym.x_fcnary.x_ary.x_dimen[0]; |
| 1631 | i = 1; |
| 1632 | n = dim[0]; |
| 1633 | for (i = 0; *dim && i < DIMNUM - 1; i++, dim++) |
| 1634 | *dim = *(dim + 1); |
| 1635 | *dim = 0; |
| 1636 | |
| 1637 | base_type = decode_type (cs, new_c_type, aux); |
| 1638 | index_type = lookup_fundamental_type (current_objfile, FT_INTEGER); |
| 1639 | range_type = |
| 1640 | create_range_type ((struct type *) NULL, index_type, 0, n - 1); |
| 1641 | type = |
| 1642 | create_array_type ((struct type *) NULL, base_type, range_type); |
| 1643 | } |
| 1644 | return type; |
| 1645 | } |
| 1646 | |
| 1647 | /* Reference to existing type. This only occurs with the |
| 1648 | struct, union, and enum types. EPI a29k coff |
| 1649 | fakes us out by producing aux entries with a nonzero |
| 1650 | x_tagndx for definitions of structs, unions, and enums, so we |
| 1651 | have to check the c_sclass field. SCO 3.2v4 cc gets confused |
| 1652 | with pointers to pointers to defined structs, and generates |
| 1653 | negative x_tagndx fields. */ |
| 1654 | if (cs->c_naux > 0 && aux->x_sym.x_tagndx.l != 0) |
| 1655 | { |
| 1656 | if (cs->c_sclass != C_STRTAG |
| 1657 | && cs->c_sclass != C_UNTAG |
| 1658 | && cs->c_sclass != C_ENTAG |
| 1659 | && aux->x_sym.x_tagndx.l >= 0) |
| 1660 | { |
| 1661 | type = coff_alloc_type (aux->x_sym.x_tagndx.l); |
| 1662 | return type; |
| 1663 | } else { |
| 1664 | complain (&tagndx_bad_complaint, cs->c_name); |
| 1665 | /* And fall through to decode_base_type... */ |
| 1666 | } |
| 1667 | } |
| 1668 | |
| 1669 | return decode_base_type (cs, BTYPE (c_type), aux); |
| 1670 | } |
| 1671 | |
| 1672 | /* Decode a coff type specifier for function definition; |
| 1673 | return the type that the function returns. */ |
| 1674 | |
| 1675 | static |
| 1676 | struct type * |
| 1677 | decode_function_type (cs, c_type, aux) |
| 1678 | register struct coff_symbol *cs; |
| 1679 | unsigned int c_type; |
| 1680 | register union internal_auxent *aux; |
| 1681 | { |
| 1682 | if (aux->x_sym.x_tagndx.l == 0) |
| 1683 | cs->c_naux = 0; /* auxent refers to function, not base type */ |
| 1684 | |
| 1685 | return decode_type (cs, DECREF (c_type), aux); |
| 1686 | } |
| 1687 | \f |
| 1688 | /* basic C types */ |
| 1689 | |
| 1690 | static |
| 1691 | struct type * |
| 1692 | decode_base_type (cs, c_type, aux) |
| 1693 | register struct coff_symbol *cs; |
| 1694 | unsigned int c_type; |
| 1695 | register union internal_auxent *aux; |
| 1696 | { |
| 1697 | struct type *type; |
| 1698 | |
| 1699 | switch (c_type) |
| 1700 | { |
| 1701 | case T_NULL: |
| 1702 | /* shows up with "void (*foo)();" structure members */ |
| 1703 | return lookup_fundamental_type (current_objfile, FT_VOID); |
| 1704 | |
| 1705 | #if 0 |
| 1706 | /* DGUX actually defines both T_ARG and T_VOID to the same value. */ |
| 1707 | #ifdef T_ARG |
| 1708 | case T_ARG: |
| 1709 | /* Shows up in DGUX, I think. Not sure where. */ |
| 1710 | return lookup_fundamental_type (current_objfile, FT_VOID); /* shouldn't show up here */ |
| 1711 | #endif |
| 1712 | #endif /* 0 */ |
| 1713 | |
| 1714 | #ifdef T_VOID |
| 1715 | case T_VOID: |
| 1716 | /* Intel 960 COFF has this symbol and meaning. */ |
| 1717 | return lookup_fundamental_type (current_objfile, FT_VOID); |
| 1718 | #endif |
| 1719 | |
| 1720 | case T_CHAR: |
| 1721 | return lookup_fundamental_type (current_objfile, FT_CHAR); |
| 1722 | |
| 1723 | case T_SHORT: |
| 1724 | return lookup_fundamental_type (current_objfile, FT_SHORT); |
| 1725 | |
| 1726 | case T_INT: |
| 1727 | return lookup_fundamental_type (current_objfile, FT_INTEGER); |
| 1728 | |
| 1729 | case T_LONG: |
| 1730 | return lookup_fundamental_type (current_objfile, FT_LONG); |
| 1731 | |
| 1732 | case T_FLOAT: |
| 1733 | return lookup_fundamental_type (current_objfile, FT_FLOAT); |
| 1734 | |
| 1735 | case T_DOUBLE: |
| 1736 | return lookup_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT); |
| 1737 | |
| 1738 | case T_STRUCT: |
| 1739 | if (cs->c_naux != 1) |
| 1740 | { |
| 1741 | /* anonymous structure type */ |
| 1742 | type = coff_alloc_type (cs->c_symnum); |
| 1743 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
| 1744 | TYPE_NAME (type) = NULL; |
| 1745 | /* This used to set the tag to "<opaque>". But I think setting it |
| 1746 | to NULL is right, and the printing code can print it as |
| 1747 | "struct {...}". */ |
| 1748 | TYPE_TAG_NAME (type) = NULL; |
| 1749 | INIT_CPLUS_SPECIFIC(type); |
| 1750 | TYPE_LENGTH (type) = 0; |
| 1751 | TYPE_FIELDS (type) = 0; |
| 1752 | TYPE_NFIELDS (type) = 0; |
| 1753 | } |
| 1754 | else |
| 1755 | { |
| 1756 | type = coff_read_struct_type (cs->c_symnum, |
| 1757 | aux->x_sym.x_misc.x_lnsz.x_size, |
| 1758 | aux->x_sym.x_fcnary.x_fcn.x_endndx.l); |
| 1759 | } |
| 1760 | return type; |
| 1761 | |
| 1762 | case T_UNION: |
| 1763 | if (cs->c_naux != 1) |
| 1764 | { |
| 1765 | /* anonymous union type */ |
| 1766 | type = coff_alloc_type (cs->c_symnum); |
| 1767 | TYPE_NAME (type) = NULL; |
| 1768 | /* This used to set the tag to "<opaque>". But I think setting it |
| 1769 | to NULL is right, and the printing code can print it as |
| 1770 | "union {...}". */ |
| 1771 | TYPE_TAG_NAME (type) = NULL; |
| 1772 | INIT_CPLUS_SPECIFIC(type); |
| 1773 | TYPE_LENGTH (type) = 0; |
| 1774 | TYPE_FIELDS (type) = 0; |
| 1775 | TYPE_NFIELDS (type) = 0; |
| 1776 | } |
| 1777 | else |
| 1778 | { |
| 1779 | type = coff_read_struct_type (cs->c_symnum, |
| 1780 | aux->x_sym.x_misc.x_lnsz.x_size, |
| 1781 | aux->x_sym.x_fcnary.x_fcn.x_endndx.l); |
| 1782 | } |
| 1783 | TYPE_CODE (type) = TYPE_CODE_UNION; |
| 1784 | return type; |
| 1785 | |
| 1786 | case T_ENUM: |
| 1787 | if (cs->c_naux != 1) |
| 1788 | { |
| 1789 | /* anonymous enum type */ |
| 1790 | type = coff_alloc_type (cs->c_symnum); |
| 1791 | TYPE_CODE (type) = TYPE_CODE_ENUM; |
| 1792 | TYPE_NAME (type) = NULL; |
| 1793 | /* This used to set the tag to "<opaque>". But I think setting it |
| 1794 | to NULL is right, and the printing code can print it as |
| 1795 | "enum {...}". */ |
| 1796 | TYPE_TAG_NAME (type) = NULL; |
| 1797 | TYPE_LENGTH (type) = 0; |
| 1798 | TYPE_FIELDS (type) = 0; |
| 1799 | TYPE_NFIELDS(type) = 0; |
| 1800 | } |
| 1801 | else |
| 1802 | { |
| 1803 | type = coff_read_enum_type (cs->c_symnum, |
| 1804 | aux->x_sym.x_misc.x_lnsz.x_size, |
| 1805 | aux->x_sym.x_fcnary.x_fcn.x_endndx.l); |
| 1806 | } |
| 1807 | return type; |
| 1808 | |
| 1809 | case T_MOE: |
| 1810 | /* shouldn't show up here */ |
| 1811 | break; |
| 1812 | |
| 1813 | case T_UCHAR: |
| 1814 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_CHAR); |
| 1815 | |
| 1816 | case T_USHORT: |
| 1817 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_SHORT); |
| 1818 | |
| 1819 | case T_UINT: |
| 1820 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); |
| 1821 | |
| 1822 | case T_ULONG: |
| 1823 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG); |
| 1824 | } |
| 1825 | complain (&unexpected_type_complaint, cs->c_name); |
| 1826 | return lookup_fundamental_type (current_objfile, FT_VOID); |
| 1827 | } |
| 1828 | \f |
| 1829 | /* This page contains subroutines of read_type. */ |
| 1830 | |
| 1831 | /* Read the description of a structure (or union type) |
| 1832 | and return an object describing the type. */ |
| 1833 | |
| 1834 | static struct type * |
| 1835 | coff_read_struct_type (index, length, lastsym) |
| 1836 | int index; |
| 1837 | int length; |
| 1838 | int lastsym; |
| 1839 | { |
| 1840 | struct nextfield |
| 1841 | { |
| 1842 | struct nextfield *next; |
| 1843 | struct field field; |
| 1844 | }; |
| 1845 | |
| 1846 | register struct type *type; |
| 1847 | register struct nextfield *list = 0; |
| 1848 | struct nextfield *new; |
| 1849 | int nfields = 0; |
| 1850 | register int n; |
| 1851 | char *name; |
| 1852 | struct coff_symbol member_sym; |
| 1853 | register struct coff_symbol *ms = &member_sym; |
| 1854 | struct internal_syment sub_sym; |
| 1855 | union internal_auxent sub_aux; |
| 1856 | int done = 0; |
| 1857 | |
| 1858 | type = coff_alloc_type (index); |
| 1859 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
| 1860 | INIT_CPLUS_SPECIFIC(type); |
| 1861 | TYPE_LENGTH (type) = length; |
| 1862 | |
| 1863 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) |
| 1864 | { |
| 1865 | read_one_sym (ms, &sub_sym, &sub_aux); |
| 1866 | name = ms->c_name; |
| 1867 | name = EXTERNAL_NAME (name, current_objfile->obfd); |
| 1868 | |
| 1869 | switch (ms->c_sclass) |
| 1870 | { |
| 1871 | case C_MOS: |
| 1872 | case C_MOU: |
| 1873 | |
| 1874 | /* Get space to record the next field's data. */ |
| 1875 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); |
| 1876 | new->next = list; |
| 1877 | list = new; |
| 1878 | |
| 1879 | /* Save the data. */ |
| 1880 | list->field.name = savestring (name, strlen (name)); |
| 1881 | list->field.type = decode_type (ms, ms->c_type, &sub_aux); |
| 1882 | list->field.bitpos = 8 * ms->c_value; |
| 1883 | list->field.bitsize = 0; |
| 1884 | nfields++; |
| 1885 | break; |
| 1886 | |
| 1887 | case C_FIELD: |
| 1888 | |
| 1889 | /* Get space to record the next field's data. */ |
| 1890 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); |
| 1891 | new->next = list; |
| 1892 | list = new; |
| 1893 | |
| 1894 | /* Save the data. */ |
| 1895 | list->field.name = savestring (name, strlen (name)); |
| 1896 | list->field.type = decode_type (ms, ms->c_type, &sub_aux); |
| 1897 | list->field.bitpos = ms->c_value; |
| 1898 | list->field.bitsize = sub_aux.x_sym.x_misc.x_lnsz.x_size; |
| 1899 | nfields++; |
| 1900 | break; |
| 1901 | |
| 1902 | case C_EOS: |
| 1903 | done = 1; |
| 1904 | break; |
| 1905 | } |
| 1906 | } |
| 1907 | /* Now create the vector of fields, and record how big it is. */ |
| 1908 | |
| 1909 | TYPE_NFIELDS (type) = nfields; |
| 1910 | TYPE_FIELDS (type) = (struct field *) |
| 1911 | TYPE_ALLOC (type, sizeof (struct field) * nfields); |
| 1912 | |
| 1913 | /* Copy the saved-up fields into the field vector. */ |
| 1914 | |
| 1915 | for (n = nfields; list; list = list->next) |
| 1916 | TYPE_FIELD (type, --n) = list->field; |
| 1917 | |
| 1918 | return type; |
| 1919 | } |
| 1920 | \f |
| 1921 | /* Read a definition of an enumeration type, |
| 1922 | and create and return a suitable type object. |
| 1923 | Also defines the symbols that represent the values of the type. */ |
| 1924 | |
| 1925 | /* ARGSUSED */ |
| 1926 | static struct type * |
| 1927 | coff_read_enum_type (index, length, lastsym) |
| 1928 | int index; |
| 1929 | int length; |
| 1930 | int lastsym; |
| 1931 | { |
| 1932 | register struct symbol *sym; |
| 1933 | register struct type *type; |
| 1934 | int nsyms = 0; |
| 1935 | int done = 0; |
| 1936 | struct pending **symlist; |
| 1937 | struct coff_symbol member_sym; |
| 1938 | register struct coff_symbol *ms = &member_sym; |
| 1939 | struct internal_syment sub_sym; |
| 1940 | union internal_auxent sub_aux; |
| 1941 | struct pending *osyms, *syms; |
| 1942 | int o_nsyms; |
| 1943 | register int n; |
| 1944 | char *name; |
| 1945 | |
| 1946 | type = coff_alloc_type (index); |
| 1947 | if (within_function) |
| 1948 | symlist = &local_symbols; |
| 1949 | else |
| 1950 | symlist = &file_symbols; |
| 1951 | osyms = *symlist; |
| 1952 | o_nsyms = osyms ? osyms->nsyms : 0; |
| 1953 | |
| 1954 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) |
| 1955 | { |
| 1956 | read_one_sym (ms, &sub_sym, &sub_aux); |
| 1957 | name = ms->c_name; |
| 1958 | name = EXTERNAL_NAME (name, current_objfile->obfd); |
| 1959 | |
| 1960 | switch (ms->c_sclass) |
| 1961 | { |
| 1962 | case C_MOE: |
| 1963 | sym = (struct symbol *) xmalloc (sizeof (struct symbol)); |
| 1964 | memset (sym, 0, sizeof (struct symbol)); |
| 1965 | |
| 1966 | SYMBOL_NAME (sym) = savestring (name, strlen (name)); |
| 1967 | SYMBOL_CLASS (sym) = LOC_CONST; |
| 1968 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
| 1969 | SYMBOL_VALUE (sym) = ms->c_value; |
| 1970 | add_symbol_to_list (sym, symlist); |
| 1971 | nsyms++; |
| 1972 | break; |
| 1973 | |
| 1974 | case C_EOS: |
| 1975 | /* Sometimes the linker (on 386/ix 2.0.2 at least) screws |
| 1976 | up the count of how many symbols to read. So stop |
| 1977 | on .eos. */ |
| 1978 | done = 1; |
| 1979 | break; |
| 1980 | } |
| 1981 | } |
| 1982 | |
| 1983 | /* Now fill in the fields of the type-structure. */ |
| 1984 | |
| 1985 | if (length > 0) |
| 1986 | TYPE_LENGTH (type) = length; |
| 1987 | else |
| 1988 | TYPE_LENGTH (type) = TARGET_INT_BIT / TARGET_CHAR_BIT; /* Assume ints */ |
| 1989 | TYPE_CODE (type) = TYPE_CODE_ENUM; |
| 1990 | TYPE_NFIELDS (type) = nsyms; |
| 1991 | TYPE_FIELDS (type) = (struct field *) |
| 1992 | TYPE_ALLOC (type, sizeof (struct field) * nsyms); |
| 1993 | |
| 1994 | /* Find the symbols for the values and put them into the type. |
| 1995 | The symbols can be found in the symlist that we put them on |
| 1996 | to cause them to be defined. osyms contains the old value |
| 1997 | of that symlist; everything up to there was defined by us. */ |
| 1998 | /* Note that we preserve the order of the enum constants, so |
| 1999 | that in something like "enum {FOO, LAST_THING=FOO}" we print |
| 2000 | FOO, not LAST_THING. */ |
| 2001 | |
| 2002 | for (syms = *symlist, n = 0; syms; syms = syms->next) |
| 2003 | { |
| 2004 | int j = 0; |
| 2005 | if (syms == osyms) |
| 2006 | j = o_nsyms; |
| 2007 | for (; j < syms->nsyms; j++,n++) |
| 2008 | { |
| 2009 | struct symbol *xsym = syms->symbol[j]; |
| 2010 | SYMBOL_TYPE (xsym) = type; |
| 2011 | TYPE_FIELD_NAME (type, n) = SYMBOL_NAME (xsym); |
| 2012 | TYPE_FIELD_VALUE (type, n) = 0; |
| 2013 | TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (xsym); |
| 2014 | TYPE_FIELD_BITSIZE (type, n) = 0; |
| 2015 | } |
| 2016 | if (syms == osyms) |
| 2017 | break; |
| 2018 | } |
| 2019 | |
| 2020 | #if 0 |
| 2021 | /* This screws up perfectly good C programs with enums. FIXME. */ |
| 2022 | /* Is this Modula-2's BOOLEAN type? Flag it as such if so. */ |
| 2023 | if(TYPE_NFIELDS(type) == 2 && |
| 2024 | ((STREQ(TYPE_FIELD_NAME(type,0),"TRUE") && |
| 2025 | STREQ(TYPE_FIELD_NAME(type,1),"FALSE")) || |
| 2026 | (STREQ(TYPE_FIELD_NAME(type,1),"TRUE") && |
| 2027 | STREQ(TYPE_FIELD_NAME(type,0),"FALSE")))) |
| 2028 | TYPE_CODE(type) = TYPE_CODE_BOOL; |
| 2029 | #endif |
| 2030 | return type; |
| 2031 | } |
| 2032 | |
| 2033 | struct section_offsets * |
| 2034 | coff_symfile_offsets (objfile, addr) |
| 2035 | struct objfile *objfile; |
| 2036 | CORE_ADDR addr; |
| 2037 | { |
| 2038 | struct section_offsets *section_offsets; |
| 2039 | int i; |
| 2040 | |
| 2041 | objfile->num_sections = SECT_OFF_MAX; |
| 2042 | section_offsets = (struct section_offsets *) |
| 2043 | obstack_alloc (&objfile -> psymbol_obstack, |
| 2044 | sizeof (struct section_offsets) |
| 2045 | + sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1)); |
| 2046 | |
| 2047 | for (i = 0; i < SECT_OFF_MAX; i++) |
| 2048 | ANOFFSET (section_offsets, i) = addr; |
| 2049 | |
| 2050 | return section_offsets; |
| 2051 | } |
| 2052 | |
| 2053 | /* Register our ability to parse symbols for coff BFD files */ |
| 2054 | |
| 2055 | static struct sym_fns coff_sym_fns = |
| 2056 | { |
| 2057 | bfd_target_coff_flavour, |
| 2058 | coff_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
| 2059 | coff_symfile_init, /* sym_init: read initial info, setup for sym_read() */ |
| 2060 | coff_symfile_read, /* sym_read: read a symbol file into symtab */ |
| 2061 | coff_symfile_finish, /* sym_finish: finished with file, cleanup */ |
| 2062 | coff_symfile_offsets, /* sym_offsets: xlate external to internal form */ |
| 2063 | NULL /* next: pointer to next struct sym_fns */ |
| 2064 | }; |
| 2065 | |
| 2066 | void |
| 2067 | _initialize_coffread () |
| 2068 | { |
| 2069 | add_symtab_fns(&coff_sym_fns); |
| 2070 | } |