| 1 | /* Read coff symbol tables and convert to internal format, for GDB. |
| 2 | Copyright (C) 1987-2015 Free Software Foundation, Inc. |
| 3 | Contributed by David D. Johnson, Brown University (ddj@cs.brown.edu). |
| 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 3 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, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "symtab.h" |
| 22 | #include "gdbtypes.h" |
| 23 | #include "demangle.h" |
| 24 | #include "breakpoint.h" |
| 25 | |
| 26 | #include "bfd.h" |
| 27 | #include "gdb_obstack.h" |
| 28 | #include <ctype.h> |
| 29 | |
| 30 | #include "coff/internal.h" /* Internal format of COFF symbols in BFD */ |
| 31 | #include "libcoff.h" /* FIXME secret internal data from BFD */ |
| 32 | #include "objfiles.h" |
| 33 | #include "buildsym.h" |
| 34 | #include "gdb-stabs.h" |
| 35 | #include "stabsread.h" |
| 36 | #include "complaints.h" |
| 37 | #include "target.h" |
| 38 | #include "block.h" |
| 39 | #include "dictionary.h" |
| 40 | |
| 41 | #include "coff-pe-read.h" |
| 42 | |
| 43 | #include "psymtab.h" |
| 44 | #include "build-id.h" |
| 45 | |
| 46 | extern void _initialize_coffread (void); |
| 47 | |
| 48 | /* Key for COFF-associated data. */ |
| 49 | |
| 50 | static const struct objfile_data *coff_objfile_data_key; |
| 51 | |
| 52 | /* The objfile we are currently reading. */ |
| 53 | |
| 54 | static struct objfile *coffread_objfile; |
| 55 | |
| 56 | struct coff_symfile_info |
| 57 | { |
| 58 | file_ptr min_lineno_offset; /* Where in file lowest line#s are. */ |
| 59 | file_ptr max_lineno_offset; /* 1+last byte of line#s in file. */ |
| 60 | |
| 61 | CORE_ADDR textaddr; /* Addr of .text section. */ |
| 62 | unsigned int textsize; /* Size of .text section. */ |
| 63 | struct stab_section_list *stabsects; /* .stab sections. */ |
| 64 | asection *stabstrsect; /* Section pointer for .stab section. */ |
| 65 | char *stabstrdata; |
| 66 | }; |
| 67 | |
| 68 | /* Translate an external name string into a user-visible name. */ |
| 69 | #define EXTERNAL_NAME(string, abfd) \ |
| 70 | (string[0] == bfd_get_symbol_leading_char (abfd) \ |
| 71 | ? string + 1 : string) |
| 72 | |
| 73 | /* To be an sdb debug type, type must have at least a basic or primary |
| 74 | derived type. Using this rather than checking against T_NULL is |
| 75 | said to prevent core dumps if we try to operate on Michael Bloom |
| 76 | dbx-in-coff file. */ |
| 77 | |
| 78 | #define SDB_TYPE(type) (BTYPE(type) | (type & N_TMASK)) |
| 79 | |
| 80 | /* Core address of start and end of text of current source file. |
| 81 | This comes from a ".text" symbol where x_nlinno > 0. */ |
| 82 | |
| 83 | static CORE_ADDR current_source_start_addr; |
| 84 | static CORE_ADDR current_source_end_addr; |
| 85 | |
| 86 | /* The addresses of the symbol table stream and number of symbols |
| 87 | of the object file we are reading (as copied into core). */ |
| 88 | |
| 89 | static bfd *nlist_bfd_global; |
| 90 | static int nlist_nsyms_global; |
| 91 | |
| 92 | |
| 93 | /* Pointers to scratch storage, used for reading raw symbols and |
| 94 | auxents. */ |
| 95 | |
| 96 | static char *temp_sym; |
| 97 | static char *temp_aux; |
| 98 | |
| 99 | /* Local variables that hold the shift and mask values for the |
| 100 | COFF file that we are currently reading. These come back to us |
| 101 | from BFD, and are referenced by their macro names, as well as |
| 102 | internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF |
| 103 | macros from include/coff/internal.h . */ |
| 104 | |
| 105 | static unsigned local_n_btmask; |
| 106 | static unsigned local_n_btshft; |
| 107 | static unsigned local_n_tmask; |
| 108 | static unsigned local_n_tshift; |
| 109 | |
| 110 | #define N_BTMASK local_n_btmask |
| 111 | #define N_BTSHFT local_n_btshft |
| 112 | #define N_TMASK local_n_tmask |
| 113 | #define N_TSHIFT local_n_tshift |
| 114 | |
| 115 | /* Local variables that hold the sizes in the file of various COFF |
| 116 | structures. (We only need to know this to read them from the file |
| 117 | -- BFD will then translate the data in them, into `internal_xxx' |
| 118 | structs in the right byte order, alignment, etc.) */ |
| 119 | |
| 120 | static unsigned local_linesz; |
| 121 | static unsigned local_symesz; |
| 122 | static unsigned local_auxesz; |
| 123 | |
| 124 | /* This is set if this is a PE format file. */ |
| 125 | |
| 126 | static int pe_file; |
| 127 | |
| 128 | /* Chain of typedefs of pointers to empty struct/union types. |
| 129 | They are chained thru the SYMBOL_VALUE_CHAIN. */ |
| 130 | |
| 131 | static struct symbol *opaque_type_chain[HASHSIZE]; |
| 132 | |
| 133 | /* Simplified internal version of coff symbol table information. */ |
| 134 | |
| 135 | struct coff_symbol |
| 136 | { |
| 137 | char *c_name; |
| 138 | int c_symnum; /* Symbol number of this entry. */ |
| 139 | int c_naux; /* 0 if syment only, 1 if syment + |
| 140 | auxent, etc. */ |
| 141 | CORE_ADDR c_value; |
| 142 | int c_sclass; |
| 143 | int c_secnum; |
| 144 | unsigned int c_type; |
| 145 | }; |
| 146 | |
| 147 | /* Vector of types defined so far, indexed by their type numbers. */ |
| 148 | |
| 149 | static struct type **type_vector; |
| 150 | |
| 151 | /* Number of elements allocated for type_vector currently. */ |
| 152 | |
| 153 | static int type_vector_length; |
| 154 | |
| 155 | /* Initial size of type vector. Is realloc'd larger if needed, and |
| 156 | realloc'd down to the size actually used, when completed. */ |
| 157 | |
| 158 | #define INITIAL_TYPE_VECTOR_LENGTH 160 |
| 159 | |
| 160 | extern void stabsread_clear_cache (void); |
| 161 | |
| 162 | static struct type *coff_read_struct_type (int, int, int, |
| 163 | struct objfile *); |
| 164 | |
| 165 | static struct type *decode_base_type (struct coff_symbol *, |
| 166 | unsigned int, |
| 167 | union internal_auxent *, |
| 168 | struct objfile *); |
| 169 | |
| 170 | static struct type *decode_type (struct coff_symbol *, unsigned int, |
| 171 | union internal_auxent *, |
| 172 | struct objfile *); |
| 173 | |
| 174 | static struct type *decode_function_type (struct coff_symbol *, |
| 175 | unsigned int, |
| 176 | union internal_auxent *, |
| 177 | struct objfile *); |
| 178 | |
| 179 | static struct type *coff_read_enum_type (int, int, int, |
| 180 | struct objfile *); |
| 181 | |
| 182 | static struct symbol *process_coff_symbol (struct coff_symbol *, |
| 183 | union internal_auxent *, |
| 184 | struct objfile *); |
| 185 | |
| 186 | static void patch_opaque_types (struct symtab *); |
| 187 | |
| 188 | static void enter_linenos (long, int, int, struct objfile *); |
| 189 | |
| 190 | static void free_linetab (void); |
| 191 | |
| 192 | static void free_linetab_cleanup (void *ignore); |
| 193 | |
| 194 | static int init_lineno (bfd *, long, int); |
| 195 | |
| 196 | static char *getsymname (struct internal_syment *); |
| 197 | |
| 198 | static const char *coff_getfilename (union internal_auxent *); |
| 199 | |
| 200 | static void free_stringtab (void); |
| 201 | |
| 202 | static void free_stringtab_cleanup (void *ignore); |
| 203 | |
| 204 | static int init_stringtab (bfd *, long); |
| 205 | |
| 206 | static void read_one_sym (struct coff_symbol *, |
| 207 | struct internal_syment *, |
| 208 | union internal_auxent *); |
| 209 | |
| 210 | static void coff_symtab_read (long, unsigned int, struct objfile *); |
| 211 | \f |
| 212 | /* We are called once per section from coff_symfile_read. We |
| 213 | need to examine each section we are passed, check to see |
| 214 | if it is something we are interested in processing, and |
| 215 | if so, stash away some access information for the section. |
| 216 | |
| 217 | FIXME: The section names should not be hardwired strings (what |
| 218 | should they be? I don't think most object file formats have enough |
| 219 | section flags to specify what kind of debug section it is |
| 220 | -kingdon). */ |
| 221 | |
| 222 | static void |
| 223 | coff_locate_sections (bfd *abfd, asection *sectp, void *csip) |
| 224 | { |
| 225 | struct coff_symfile_info *csi; |
| 226 | const char *name; |
| 227 | |
| 228 | csi = (struct coff_symfile_info *) csip; |
| 229 | name = bfd_get_section_name (abfd, sectp); |
| 230 | if (strcmp (name, ".text") == 0) |
| 231 | { |
| 232 | csi->textaddr = bfd_section_vma (abfd, sectp); |
| 233 | csi->textsize += bfd_section_size (abfd, sectp); |
| 234 | } |
| 235 | else if (startswith (name, ".text")) |
| 236 | { |
| 237 | csi->textsize += bfd_section_size (abfd, sectp); |
| 238 | } |
| 239 | else if (strcmp (name, ".stabstr") == 0) |
| 240 | { |
| 241 | csi->stabstrsect = sectp; |
| 242 | } |
| 243 | else if (startswith (name, ".stab")) |
| 244 | { |
| 245 | const char *s; |
| 246 | |
| 247 | /* We can have multiple .stab sections if linked with |
| 248 | --split-by-reloc. */ |
| 249 | for (s = name + sizeof ".stab" - 1; *s != '\0'; s++) |
| 250 | if (!isdigit (*s)) |
| 251 | break; |
| 252 | if (*s == '\0') |
| 253 | { |
| 254 | struct stab_section_list *n, **pn; |
| 255 | |
| 256 | n = XNEW (struct stab_section_list); |
| 257 | n->section = sectp; |
| 258 | n->next = NULL; |
| 259 | for (pn = &csi->stabsects; *pn != NULL; pn = &(*pn)->next) |
| 260 | ; |
| 261 | *pn = n; |
| 262 | |
| 263 | /* This will be run after coffstab_build_psymtabs is called |
| 264 | in coff_symfile_read, at which point we no longer need |
| 265 | the information. */ |
| 266 | make_cleanup (xfree, n); |
| 267 | } |
| 268 | } |
| 269 | } |
| 270 | |
| 271 | /* Return the section_offsets* that CS points to. */ |
| 272 | static int cs_to_section (struct coff_symbol *, struct objfile *); |
| 273 | |
| 274 | struct find_targ_sec_arg |
| 275 | { |
| 276 | int targ_index; |
| 277 | asection **resultp; |
| 278 | }; |
| 279 | |
| 280 | static void |
| 281 | find_targ_sec (bfd *abfd, asection *sect, void *obj) |
| 282 | { |
| 283 | struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj; |
| 284 | |
| 285 | if (sect->target_index == args->targ_index) |
| 286 | *args->resultp = sect; |
| 287 | } |
| 288 | |
| 289 | /* Return the bfd_section that CS points to. */ |
| 290 | static struct bfd_section* |
| 291 | cs_to_bfd_section (struct coff_symbol *cs, struct objfile *objfile) |
| 292 | { |
| 293 | asection *sect = NULL; |
| 294 | struct find_targ_sec_arg args; |
| 295 | |
| 296 | args.targ_index = cs->c_secnum; |
| 297 | args.resultp = § |
| 298 | bfd_map_over_sections (objfile->obfd, find_targ_sec, &args); |
| 299 | return sect; |
| 300 | } |
| 301 | |
| 302 | /* Return the section number (SECT_OFF_*) that CS points to. */ |
| 303 | static int |
| 304 | cs_to_section (struct coff_symbol *cs, struct objfile *objfile) |
| 305 | { |
| 306 | asection *sect = cs_to_bfd_section (cs, objfile); |
| 307 | |
| 308 | if (sect == NULL) |
| 309 | return SECT_OFF_TEXT (objfile); |
| 310 | return gdb_bfd_section_index (objfile->obfd, sect); |
| 311 | } |
| 312 | |
| 313 | /* Return the address of the section of a COFF symbol. */ |
| 314 | |
| 315 | static CORE_ADDR cs_section_address (struct coff_symbol *, bfd *); |
| 316 | |
| 317 | static CORE_ADDR |
| 318 | cs_section_address (struct coff_symbol *cs, bfd *abfd) |
| 319 | { |
| 320 | asection *sect = NULL; |
| 321 | struct find_targ_sec_arg args; |
| 322 | CORE_ADDR addr = 0; |
| 323 | |
| 324 | args.targ_index = cs->c_secnum; |
| 325 | args.resultp = § |
| 326 | bfd_map_over_sections (abfd, find_targ_sec, &args); |
| 327 | if (sect != NULL) |
| 328 | addr = bfd_get_section_vma (abfd, sect); |
| 329 | return addr; |
| 330 | } |
| 331 | |
| 332 | /* Look up a coff type-number index. Return the address of the slot |
| 333 | where the type for that index is stored. |
| 334 | The type-number is in INDEX. |
| 335 | |
| 336 | This can be used for finding the type associated with that index |
| 337 | or for associating a new type with the index. */ |
| 338 | |
| 339 | static struct type ** |
| 340 | coff_lookup_type (int index) |
| 341 | { |
| 342 | if (index >= type_vector_length) |
| 343 | { |
| 344 | int old_vector_length = type_vector_length; |
| 345 | |
| 346 | type_vector_length *= 2; |
| 347 | if (index /* is still */ >= type_vector_length) |
| 348 | type_vector_length = index * 2; |
| 349 | |
| 350 | type_vector = (struct type **) |
| 351 | xrealloc ((char *) type_vector, |
| 352 | type_vector_length * sizeof (struct type *)); |
| 353 | memset (&type_vector[old_vector_length], 0, |
| 354 | (type_vector_length - old_vector_length) * sizeof (struct type *)); |
| 355 | } |
| 356 | return &type_vector[index]; |
| 357 | } |
| 358 | |
| 359 | /* Make sure there is a type allocated for type number index |
| 360 | and return the type object. |
| 361 | This can create an empty (zeroed) type object. */ |
| 362 | |
| 363 | static struct type * |
| 364 | coff_alloc_type (int index) |
| 365 | { |
| 366 | struct type **type_addr = coff_lookup_type (index); |
| 367 | struct type *type = *type_addr; |
| 368 | |
| 369 | /* If we are referring to a type not known at all yet, |
| 370 | allocate an empty type for it. |
| 371 | We will fill it in later if we find out how. */ |
| 372 | if (type == NULL) |
| 373 | { |
| 374 | type = alloc_type (coffread_objfile); |
| 375 | *type_addr = type; |
| 376 | } |
| 377 | return type; |
| 378 | } |
| 379 | \f |
| 380 | /* Start a new symtab for a new source file. |
| 381 | This is called when a COFF ".file" symbol is seen; |
| 382 | it indicates the start of data for one original source file. */ |
| 383 | |
| 384 | static void |
| 385 | coff_start_symtab (struct objfile *objfile, const char *name) |
| 386 | { |
| 387 | start_symtab (objfile, |
| 388 | /* We fill in the filename later. start_symtab puts this pointer |
| 389 | into last_source_file and we put it in subfiles->name, which |
| 390 | end_symtab frees; that's why it must be malloc'd. */ |
| 391 | xstrdup (name), |
| 392 | /* We never know the directory name for COFF. */ |
| 393 | NULL, |
| 394 | /* The start address is irrelevant, since we set |
| 395 | last_source_start_addr in coff_end_symtab. */ |
| 396 | 0); |
| 397 | record_debugformat ("COFF"); |
| 398 | } |
| 399 | |
| 400 | /* Save the vital information from when starting to read a file, |
| 401 | for use when closing off the current file. |
| 402 | NAME is the file name the symbols came from, START_ADDR is the |
| 403 | first text address for the file, and SIZE is the number of bytes of |
| 404 | text. */ |
| 405 | |
| 406 | static void |
| 407 | complete_symtab (const char *name, CORE_ADDR start_addr, unsigned int size) |
| 408 | { |
| 409 | set_last_source_file (name); |
| 410 | current_source_start_addr = start_addr; |
| 411 | current_source_end_addr = start_addr + size; |
| 412 | } |
| 413 | |
| 414 | /* Finish the symbol definitions for one main source file, close off |
| 415 | all the lexical contexts for that file (creating struct block's for |
| 416 | them), then make the struct symtab for that file and put it in the |
| 417 | list of all such. */ |
| 418 | |
| 419 | static void |
| 420 | coff_end_symtab (struct objfile *objfile) |
| 421 | { |
| 422 | last_source_start_addr = current_source_start_addr; |
| 423 | |
| 424 | end_symtab (current_source_end_addr, SECT_OFF_TEXT (objfile)); |
| 425 | |
| 426 | /* Reinitialize for beginning of new file. */ |
| 427 | set_last_source_file (NULL); |
| 428 | } |
| 429 | \f |
| 430 | /* The linker sometimes generates some non-function symbols inside |
| 431 | functions referencing variables imported from another DLL. |
| 432 | Return nonzero if the given symbol corresponds to one of them. */ |
| 433 | |
| 434 | static int |
| 435 | is_import_fixup_symbol (struct coff_symbol *cs, |
| 436 | enum minimal_symbol_type type) |
| 437 | { |
| 438 | /* The following is a bit of a heuristic using the characterictics |
| 439 | of these fixup symbols, but should work well in practice... */ |
| 440 | int i; |
| 441 | |
| 442 | /* Must be a non-static text symbol. */ |
| 443 | if (type != mst_text) |
| 444 | return 0; |
| 445 | |
| 446 | /* Must be a non-function symbol. */ |
| 447 | if (ISFCN (cs->c_type)) |
| 448 | return 0; |
| 449 | |
| 450 | /* The name must start with "__fu<digits>__". */ |
| 451 | if (!startswith (cs->c_name, "__fu")) |
| 452 | return 0; |
| 453 | if (! isdigit (cs->c_name[4])) |
| 454 | return 0; |
| 455 | for (i = 5; cs->c_name[i] != '\0' && isdigit (cs->c_name[i]); i++) |
| 456 | /* Nothing, just incrementing index past all digits. */; |
| 457 | if (cs->c_name[i] != '_' || cs->c_name[i + 1] != '_') |
| 458 | return 0; |
| 459 | |
| 460 | return 1; |
| 461 | } |
| 462 | |
| 463 | static struct minimal_symbol * |
| 464 | record_minimal_symbol (struct coff_symbol *cs, CORE_ADDR address, |
| 465 | enum minimal_symbol_type type, int section, |
| 466 | struct objfile *objfile) |
| 467 | { |
| 468 | /* We don't want TDESC entry points in the minimal symbol table. */ |
| 469 | if (cs->c_name[0] == '@') |
| 470 | return NULL; |
| 471 | |
| 472 | if (is_import_fixup_symbol (cs, type)) |
| 473 | { |
| 474 | /* Because the value of these symbols is within a function code |
| 475 | range, these symbols interfere with the symbol-from-address |
| 476 | reverse lookup; this manifests itselfs in backtraces, or any |
| 477 | other commands that prints symbolic addresses. Just pretend |
| 478 | these symbols do not exist. */ |
| 479 | return NULL; |
| 480 | } |
| 481 | |
| 482 | return prim_record_minimal_symbol_and_info (cs->c_name, address, |
| 483 | type, section, objfile); |
| 484 | } |
| 485 | \f |
| 486 | /* coff_symfile_init () |
| 487 | is the coff-specific initialization routine for reading symbols. |
| 488 | It is passed a struct objfile which contains, among other things, |
| 489 | the BFD for the file whose symbols are being read, and a slot for |
| 490 | a pointer to "private data" which we fill with cookies and other |
| 491 | treats for coff_symfile_read (). |
| 492 | |
| 493 | We will only be called if this is a COFF or COFF-like file. BFD |
| 494 | handles figuring out the format of the file, and code in symtab.c |
| 495 | uses BFD's determination to vector to us. |
| 496 | |
| 497 | The ultimate result is a new symtab (or, FIXME, eventually a |
| 498 | psymtab). */ |
| 499 | |
| 500 | static void |
| 501 | coff_symfile_init (struct objfile *objfile) |
| 502 | { |
| 503 | struct dbx_symfile_info *dbx; |
| 504 | struct coff_symfile_info *coff; |
| 505 | |
| 506 | /* Allocate struct to keep track of stab reading. */ |
| 507 | dbx = XCNEW (struct dbx_symfile_info); |
| 508 | set_objfile_data (objfile, dbx_objfile_data_key, dbx); |
| 509 | |
| 510 | /* Allocate struct to keep track of the symfile. */ |
| 511 | coff = XCNEW (struct coff_symfile_info); |
| 512 | set_objfile_data (objfile, coff_objfile_data_key, coff); |
| 513 | |
| 514 | /* COFF objects may be reordered, so set OBJF_REORDERED. If we |
| 515 | find this causes a significant slowdown in gdb then we could |
| 516 | set it in the debug symbol readers only when necessary. */ |
| 517 | objfile->flags |= OBJF_REORDERED; |
| 518 | } |
| 519 | |
| 520 | /* This function is called for every section; it finds the outer |
| 521 | limits of the line table (minimum and maximum file offset) so that |
| 522 | the mainline code can read the whole thing for efficiency. */ |
| 523 | |
| 524 | static void |
| 525 | find_linenos (bfd *abfd, struct bfd_section *asect, void *vpinfo) |
| 526 | { |
| 527 | struct coff_symfile_info *info; |
| 528 | int size, count; |
| 529 | file_ptr offset, maxoff; |
| 530 | |
| 531 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ |
| 532 | count = asect->lineno_count; |
| 533 | /* End of warning. */ |
| 534 | |
| 535 | if (count == 0) |
| 536 | return; |
| 537 | size = count * local_linesz; |
| 538 | |
| 539 | info = (struct coff_symfile_info *) vpinfo; |
| 540 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ |
| 541 | offset = asect->line_filepos; |
| 542 | /* End of warning. */ |
| 543 | |
| 544 | if (offset < info->min_lineno_offset || info->min_lineno_offset == 0) |
| 545 | info->min_lineno_offset = offset; |
| 546 | |
| 547 | maxoff = offset + size; |
| 548 | if (maxoff > info->max_lineno_offset) |
| 549 | info->max_lineno_offset = maxoff; |
| 550 | } |
| 551 | |
| 552 | |
| 553 | /* The BFD for this file -- only good while we're actively reading |
| 554 | symbols into a psymtab or a symtab. */ |
| 555 | |
| 556 | static bfd *symfile_bfd; |
| 557 | |
| 558 | /* Read a symbol file, after initialization by coff_symfile_init. */ |
| 559 | |
| 560 | static void |
| 561 | coff_symfile_read (struct objfile *objfile, int symfile_flags) |
| 562 | { |
| 563 | struct coff_symfile_info *info; |
| 564 | struct dbx_symfile_info *dbxinfo; |
| 565 | bfd *abfd = objfile->obfd; |
| 566 | coff_data_type *cdata = coff_data (abfd); |
| 567 | char *name = bfd_get_filename (abfd); |
| 568 | int val; |
| 569 | unsigned int num_symbols; |
| 570 | int symtab_offset; |
| 571 | int stringtab_offset; |
| 572 | struct cleanup *back_to, *cleanup_minimal_symbols; |
| 573 | int stabstrsize; |
| 574 | |
| 575 | info = (struct coff_symfile_info *) objfile_data (objfile, |
| 576 | coff_objfile_data_key); |
| 577 | dbxinfo = DBX_SYMFILE_INFO (objfile); |
| 578 | symfile_bfd = abfd; /* Kludge for swap routines. */ |
| 579 | |
| 580 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ |
| 581 | num_symbols = bfd_get_symcount (abfd); /* How many syms */ |
| 582 | symtab_offset = cdata->sym_filepos; /* Symbol table file offset */ |
| 583 | stringtab_offset = symtab_offset + /* String table file offset */ |
| 584 | num_symbols * cdata->local_symesz; |
| 585 | |
| 586 | /* Set a few file-statics that give us specific information about |
| 587 | the particular COFF file format we're reading. */ |
| 588 | local_n_btmask = cdata->local_n_btmask; |
| 589 | local_n_btshft = cdata->local_n_btshft; |
| 590 | local_n_tmask = cdata->local_n_tmask; |
| 591 | local_n_tshift = cdata->local_n_tshift; |
| 592 | local_linesz = cdata->local_linesz; |
| 593 | local_symesz = cdata->local_symesz; |
| 594 | local_auxesz = cdata->local_auxesz; |
| 595 | |
| 596 | /* Allocate space for raw symbol and aux entries, based on their |
| 597 | space requirements as reported by BFD. */ |
| 598 | temp_sym = (char *) xmalloc |
| 599 | (cdata->local_symesz + cdata->local_auxesz); |
| 600 | temp_aux = temp_sym + cdata->local_symesz; |
| 601 | back_to = make_cleanup (free_current_contents, &temp_sym); |
| 602 | |
| 603 | /* We need to know whether this is a PE file, because in PE files, |
| 604 | unlike standard COFF files, symbol values are stored as offsets |
| 605 | from the section address, rather than as absolute addresses. |
| 606 | FIXME: We should use BFD to read the symbol table, and thus avoid |
| 607 | this problem. */ |
| 608 | pe_file = |
| 609 | startswith (bfd_get_target (objfile->obfd), "pe") |
| 610 | || startswith (bfd_get_target (objfile->obfd), "epoc-pe"); |
| 611 | |
| 612 | /* End of warning. */ |
| 613 | |
| 614 | info->min_lineno_offset = 0; |
| 615 | info->max_lineno_offset = 0; |
| 616 | |
| 617 | /* Only read line number information if we have symbols. |
| 618 | |
| 619 | On Windows NT, some of the system's DLL's have sections with |
| 620 | PointerToLinenumbers fields that are non-zero, but point at |
| 621 | random places within the image file. (In the case I found, |
| 622 | KERNEL32.DLL's .text section has a line number info pointer that |
| 623 | points into the middle of the string `lib\\i386\kernel32.dll'.) |
| 624 | |
| 625 | However, these DLL's also have no symbols. The line number |
| 626 | tables are meaningless without symbols. And in fact, GDB never |
| 627 | uses the line number information unless there are symbols. So we |
| 628 | can avoid spurious error messages (and maybe run a little |
| 629 | faster!) by not even reading the line number table unless we have |
| 630 | symbols. */ |
| 631 | if (num_symbols > 0) |
| 632 | { |
| 633 | /* Read the line number table, all at once. */ |
| 634 | bfd_map_over_sections (abfd, find_linenos, (void *) info); |
| 635 | |
| 636 | make_cleanup (free_linetab_cleanup, 0 /*ignore*/); |
| 637 | val = init_lineno (abfd, info->min_lineno_offset, |
| 638 | info->max_lineno_offset - info->min_lineno_offset); |
| 639 | if (val < 0) |
| 640 | error (_("\"%s\": error reading line numbers."), name); |
| 641 | } |
| 642 | |
| 643 | /* Now read the string table, all at once. */ |
| 644 | |
| 645 | make_cleanup (free_stringtab_cleanup, 0 /*ignore*/); |
| 646 | val = init_stringtab (abfd, stringtab_offset); |
| 647 | if (val < 0) |
| 648 | error (_("\"%s\": can't get string table"), name); |
| 649 | |
| 650 | init_minimal_symbol_collection (); |
| 651 | cleanup_minimal_symbols = make_cleanup_discard_minimal_symbols (); |
| 652 | |
| 653 | /* Now that the executable file is positioned at symbol table, |
| 654 | process it and define symbols accordingly. */ |
| 655 | |
| 656 | coff_symtab_read ((long) symtab_offset, num_symbols, objfile); |
| 657 | |
| 658 | /* Install any minimal symbols that have been collected as the |
| 659 | current minimal symbols for this objfile. */ |
| 660 | |
| 661 | install_minimal_symbols (objfile); |
| 662 | |
| 663 | if (pe_file) |
| 664 | { |
| 665 | struct minimal_symbol *msym; |
| 666 | |
| 667 | ALL_OBJFILE_MSYMBOLS (objfile, msym) |
| 668 | { |
| 669 | const char *name = MSYMBOL_LINKAGE_NAME (msym); |
| 670 | |
| 671 | /* If the minimal symbols whose name are prefixed by "__imp_" |
| 672 | or "_imp_", get rid of the prefix, and search the minimal |
| 673 | symbol in OBJFILE. Note that 'maintenance print msymbols' |
| 674 | shows that type of these "_imp_XXXX" symbols is mst_data. */ |
| 675 | if (MSYMBOL_TYPE (msym) == mst_data) |
| 676 | { |
| 677 | const char *name1 = NULL; |
| 678 | |
| 679 | if (startswith (name, "_imp_")) |
| 680 | name1 = name + 5; |
| 681 | else if (startswith (name, "__imp_")) |
| 682 | name1 = name + 6; |
| 683 | if (name1 != NULL) |
| 684 | { |
| 685 | int lead = bfd_get_symbol_leading_char (objfile->obfd); |
| 686 | struct bound_minimal_symbol found; |
| 687 | |
| 688 | if (lead != '\0' && *name1 == lead) |
| 689 | name1 += 1; |
| 690 | |
| 691 | found = lookup_minimal_symbol (name1, NULL, objfile); |
| 692 | |
| 693 | /* If found, there are symbols named "_imp_foo" and "foo" |
| 694 | respectively in OBJFILE. Set the type of symbol "foo" |
| 695 | as 'mst_solib_trampoline'. */ |
| 696 | if (found.minsym != NULL |
| 697 | && MSYMBOL_TYPE (found.minsym) == mst_text) |
| 698 | MSYMBOL_TYPE (found.minsym) = mst_solib_trampoline; |
| 699 | } |
| 700 | } |
| 701 | } |
| 702 | } |
| 703 | |
| 704 | /* Free the installed minimal symbol data. */ |
| 705 | do_cleanups (cleanup_minimal_symbols); |
| 706 | |
| 707 | bfd_map_over_sections (abfd, coff_locate_sections, (void *) info); |
| 708 | |
| 709 | if (info->stabsects) |
| 710 | { |
| 711 | if (!info->stabstrsect) |
| 712 | { |
| 713 | error (_("The debugging information in `%s' is corrupted.\nThe " |
| 714 | "file has a `.stabs' section, but no `.stabstr' section."), |
| 715 | name); |
| 716 | } |
| 717 | |
| 718 | /* FIXME: dubious. Why can't we use something normal like |
| 719 | bfd_get_section_contents? */ |
| 720 | bfd_seek (abfd, abfd->where, 0); |
| 721 | |
| 722 | stabstrsize = bfd_section_size (abfd, info->stabstrsect); |
| 723 | |
| 724 | coffstab_build_psymtabs (objfile, |
| 725 | info->textaddr, info->textsize, |
| 726 | info->stabsects, |
| 727 | info->stabstrsect->filepos, stabstrsize); |
| 728 | } |
| 729 | if (dwarf2_has_info (objfile, NULL)) |
| 730 | { |
| 731 | /* DWARF2 sections. */ |
| 732 | dwarf2_build_psymtabs (objfile); |
| 733 | } |
| 734 | |
| 735 | dwarf2_build_frame_info (objfile); |
| 736 | |
| 737 | /* Try to add separate debug file if no symbols table found. */ |
| 738 | if (!objfile_has_partial_symbols (objfile)) |
| 739 | { |
| 740 | char *debugfile; |
| 741 | |
| 742 | debugfile = find_separate_debug_file_by_buildid (objfile); |
| 743 | |
| 744 | if (debugfile == NULL) |
| 745 | debugfile = find_separate_debug_file_by_debuglink (objfile); |
| 746 | make_cleanup (xfree, debugfile); |
| 747 | |
| 748 | if (debugfile) |
| 749 | { |
| 750 | bfd *abfd = symfile_bfd_open (debugfile); |
| 751 | |
| 752 | make_cleanup_bfd_unref (abfd); |
| 753 | symbol_file_add_separate (abfd, debugfile, symfile_flags, objfile); |
| 754 | } |
| 755 | } |
| 756 | |
| 757 | do_cleanups (back_to); |
| 758 | } |
| 759 | |
| 760 | static void |
| 761 | coff_new_init (struct objfile *ignore) |
| 762 | { |
| 763 | } |
| 764 | |
| 765 | /* Perform any local cleanups required when we are done with a |
| 766 | particular objfile. I.E, we are in the process of discarding all |
| 767 | symbol information for an objfile, freeing up all memory held for |
| 768 | it, and unlinking the objfile struct from the global list of known |
| 769 | objfiles. */ |
| 770 | |
| 771 | static void |
| 772 | coff_symfile_finish (struct objfile *objfile) |
| 773 | { |
| 774 | /* Let stabs reader clean up. */ |
| 775 | stabsread_clear_cache (); |
| 776 | |
| 777 | dwarf2_free_objfile (objfile); |
| 778 | } |
| 779 | \f |
| 780 | |
| 781 | /* Given pointers to a symbol table in coff style exec file, |
| 782 | analyze them and create struct symtab's describing the symbols. |
| 783 | NSYMS is the number of symbols in the symbol table. |
| 784 | We read them one at a time using read_one_sym (). */ |
| 785 | |
| 786 | static void |
| 787 | coff_symtab_read (long symtab_offset, unsigned int nsyms, |
| 788 | struct objfile *objfile) |
| 789 | { |
| 790 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 791 | struct context_stack *newobj; |
| 792 | struct coff_symbol coff_symbol; |
| 793 | struct coff_symbol *cs = &coff_symbol; |
| 794 | static struct internal_syment main_sym; |
| 795 | static union internal_auxent main_aux; |
| 796 | struct coff_symbol fcn_cs_saved; |
| 797 | static struct internal_syment fcn_sym_saved; |
| 798 | static union internal_auxent fcn_aux_saved; |
| 799 | /* A .file is open. */ |
| 800 | int in_source_file = 0; |
| 801 | int next_file_symnum = -1; |
| 802 | /* Name of the current file. */ |
| 803 | const char *filestring = ""; |
| 804 | int depth = 0; |
| 805 | int fcn_first_line = 0; |
| 806 | CORE_ADDR fcn_first_line_addr = 0; |
| 807 | int fcn_last_line = 0; |
| 808 | int fcn_start_addr = 0; |
| 809 | long fcn_line_ptr = 0; |
| 810 | int val; |
| 811 | CORE_ADDR tmpaddr; |
| 812 | struct minimal_symbol *msym; |
| 813 | |
| 814 | /* Work around a stdio bug in SunOS4.1.1 (this makes me nervous.... |
| 815 | it's hard to know I've really worked around it. The fix should |
| 816 | be harmless, anyway). The symptom of the bug is that the first |
| 817 | fread (in read_one_sym), will (in my example) actually get data |
| 818 | from file offset 268, when the fseek was to 264 (and ftell shows |
| 819 | 264). This causes all hell to break loose. I was unable to |
| 820 | reproduce this on a short test program which operated on the same |
| 821 | file, performing (I think) the same sequence of operations. |
| 822 | |
| 823 | It stopped happening when I put in this (former) rewind(). |
| 824 | |
| 825 | FIXME: Find out if this has been reported to Sun, whether it has |
| 826 | been fixed in a later release, etc. */ |
| 827 | |
| 828 | bfd_seek (objfile->obfd, 0, 0); |
| 829 | |
| 830 | /* Position to read the symbol table. */ |
| 831 | val = bfd_seek (objfile->obfd, (long) symtab_offset, 0); |
| 832 | if (val < 0) |
| 833 | perror_with_name (objfile_name (objfile)); |
| 834 | |
| 835 | coffread_objfile = objfile; |
| 836 | nlist_bfd_global = objfile->obfd; |
| 837 | nlist_nsyms_global = nsyms; |
| 838 | set_last_source_file (NULL); |
| 839 | memset (opaque_type_chain, 0, sizeof opaque_type_chain); |
| 840 | |
| 841 | if (type_vector) /* Get rid of previous one. */ |
| 842 | xfree (type_vector); |
| 843 | type_vector_length = INITIAL_TYPE_VECTOR_LENGTH; |
| 844 | type_vector = XCNEWVEC (struct type *, type_vector_length); |
| 845 | |
| 846 | coff_start_symtab (objfile, ""); |
| 847 | |
| 848 | symnum = 0; |
| 849 | while (symnum < nsyms) |
| 850 | { |
| 851 | QUIT; /* Make this command interruptable. */ |
| 852 | |
| 853 | read_one_sym (cs, &main_sym, &main_aux); |
| 854 | |
| 855 | if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) |
| 856 | { |
| 857 | if (get_last_source_file ()) |
| 858 | coff_end_symtab (objfile); |
| 859 | |
| 860 | coff_start_symtab (objfile, "_globals_"); |
| 861 | /* coff_start_symtab will set the language of this symtab to |
| 862 | language_unknown, since such a ``file name'' is not |
| 863 | recognized. Override that with the minimal language to |
| 864 | allow printing values in this symtab. */ |
| 865 | current_subfile->language = language_minimal; |
| 866 | complete_symtab ("_globals_", 0, 0); |
| 867 | /* Done with all files, everything from here on out is |
| 868 | globals. */ |
| 869 | } |
| 870 | |
| 871 | /* Special case for file with type declarations only, no |
| 872 | text. */ |
| 873 | if (!get_last_source_file () && SDB_TYPE (cs->c_type) |
| 874 | && cs->c_secnum == N_DEBUG) |
| 875 | complete_symtab (filestring, 0, 0); |
| 876 | |
| 877 | /* Typedefs should not be treated as symbol definitions. */ |
| 878 | if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF) |
| 879 | { |
| 880 | /* Record all functions -- external and static -- in |
| 881 | minsyms. */ |
| 882 | int section = cs_to_section (cs, objfile); |
| 883 | |
| 884 | tmpaddr = cs->c_value; |
| 885 | record_minimal_symbol (cs, tmpaddr, mst_text, |
| 886 | section, objfile); |
| 887 | |
| 888 | fcn_line_ptr = main_aux.x_sym.x_fcnary.x_fcn.x_lnnoptr; |
| 889 | fcn_start_addr = tmpaddr; |
| 890 | fcn_cs_saved = *cs; |
| 891 | fcn_sym_saved = main_sym; |
| 892 | fcn_aux_saved = main_aux; |
| 893 | continue; |
| 894 | } |
| 895 | |
| 896 | switch (cs->c_sclass) |
| 897 | { |
| 898 | case C_EFCN: |
| 899 | case C_EXTDEF: |
| 900 | case C_ULABEL: |
| 901 | case C_USTATIC: |
| 902 | case C_LINE: |
| 903 | case C_ALIAS: |
| 904 | case C_HIDDEN: |
| 905 | complaint (&symfile_complaints, |
| 906 | _("Bad n_sclass for symbol %s"), |
| 907 | cs->c_name); |
| 908 | break; |
| 909 | |
| 910 | case C_FILE: |
| 911 | /* c_value field contains symnum of next .file entry in |
| 912 | table or symnum of first global after last .file. */ |
| 913 | next_file_symnum = cs->c_value; |
| 914 | if (cs->c_naux > 0) |
| 915 | filestring = coff_getfilename (&main_aux); |
| 916 | else |
| 917 | filestring = ""; |
| 918 | |
| 919 | /* Complete symbol table for last object file |
| 920 | containing debugging information. */ |
| 921 | if (get_last_source_file ()) |
| 922 | { |
| 923 | coff_end_symtab (objfile); |
| 924 | coff_start_symtab (objfile, filestring); |
| 925 | } |
| 926 | in_source_file = 1; |
| 927 | break; |
| 928 | |
| 929 | /* C_LABEL is used for labels and static functions. |
| 930 | Including it here allows gdb to see static functions when |
| 931 | no debug info is available. */ |
| 932 | case C_LABEL: |
| 933 | /* However, labels within a function can make weird |
| 934 | backtraces, so filter them out (from phdm@macqel.be). */ |
| 935 | if (within_function) |
| 936 | break; |
| 937 | case C_STAT: |
| 938 | case C_THUMBLABEL: |
| 939 | case C_THUMBSTAT: |
| 940 | case C_THUMBSTATFUNC: |
| 941 | if (cs->c_name[0] == '.') |
| 942 | { |
| 943 | if (strcmp (cs->c_name, ".text") == 0) |
| 944 | { |
| 945 | /* FIXME: don't wire in ".text" as section name or |
| 946 | symbol name! */ |
| 947 | /* Check for in_source_file deals with case of a |
| 948 | file with debugging symbols followed by a later |
| 949 | file with no symbols. */ |
| 950 | if (in_source_file) |
| 951 | complete_symtab (filestring, |
| 952 | cs->c_value + ANOFFSET (objfile->section_offsets, |
| 953 | SECT_OFF_TEXT (objfile)), |
| 954 | main_aux.x_scn.x_scnlen); |
| 955 | in_source_file = 0; |
| 956 | } |
| 957 | /* Flush rest of '.' symbols. */ |
| 958 | break; |
| 959 | } |
| 960 | else if (!SDB_TYPE (cs->c_type) |
| 961 | && cs->c_name[0] == 'L' |
| 962 | && (startswith (cs->c_name, "LI%") |
| 963 | || startswith (cs->c_name, "LF%") |
| 964 | || startswith (cs->c_name, "LC%") |
| 965 | || startswith (cs->c_name, "LP%") |
| 966 | || startswith (cs->c_name, "LPB%") |
| 967 | || startswith (cs->c_name, "LBB%") |
| 968 | || startswith (cs->c_name, "LBE%") |
| 969 | || startswith (cs->c_name, "LPBX%"))) |
| 970 | /* At least on a 3b1, gcc generates swbeg and string labels |
| 971 | that look like this. Ignore them. */ |
| 972 | break; |
| 973 | /* Fall in for static symbols that don't start with '.' */ |
| 974 | case C_THUMBEXT: |
| 975 | case C_THUMBEXTFUNC: |
| 976 | case C_EXT: |
| 977 | { |
| 978 | /* Record it in the minimal symbols regardless of |
| 979 | SDB_TYPE. This parallels what we do for other debug |
| 980 | formats, and probably is needed to make |
| 981 | print_address_symbolic work right without the (now |
| 982 | gone) "set fast-symbolic-addr off" kludge. */ |
| 983 | |
| 984 | enum minimal_symbol_type ms_type; |
| 985 | int sec; |
| 986 | CORE_ADDR offset = 0; |
| 987 | |
| 988 | if (cs->c_secnum == N_UNDEF) |
| 989 | { |
| 990 | /* This is a common symbol. We used to rely on |
| 991 | the target to tell us whether it knows where |
| 992 | the symbol has been relocated to, but none of |
| 993 | the target implementations actually provided |
| 994 | that operation. So we just ignore the symbol, |
| 995 | the same way we would do if we had a target-side |
| 996 | symbol lookup which returned no match. */ |
| 997 | break; |
| 998 | } |
| 999 | else if (cs->c_secnum == N_ABS) |
| 1000 | { |
| 1001 | /* Use the correct minimal symbol type (and don't |
| 1002 | relocate) for absolute values. */ |
| 1003 | ms_type = mst_abs; |
| 1004 | sec = cs_to_section (cs, objfile); |
| 1005 | tmpaddr = cs->c_value; |
| 1006 | } |
| 1007 | else |
| 1008 | { |
| 1009 | asection *bfd_section = cs_to_bfd_section (cs, objfile); |
| 1010 | |
| 1011 | sec = cs_to_section (cs, objfile); |
| 1012 | tmpaddr = cs->c_value; |
| 1013 | /* Statics in a PE file also get relocated. */ |
| 1014 | if (cs->c_sclass == C_EXT |
| 1015 | || cs->c_sclass == C_THUMBEXTFUNC |
| 1016 | || cs->c_sclass == C_THUMBEXT |
| 1017 | || (pe_file && (cs->c_sclass == C_STAT))) |
| 1018 | offset = ANOFFSET (objfile->section_offsets, sec); |
| 1019 | |
| 1020 | if (bfd_section->flags & SEC_CODE) |
| 1021 | { |
| 1022 | ms_type = |
| 1023 | cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXTFUNC |
| 1024 | || cs->c_sclass == C_THUMBEXT ? |
| 1025 | mst_text : mst_file_text; |
| 1026 | tmpaddr = gdbarch_addr_bits_remove (gdbarch, tmpaddr); |
| 1027 | } |
| 1028 | else if (bfd_section->flags & SEC_ALLOC |
| 1029 | && bfd_section->flags & SEC_LOAD) |
| 1030 | { |
| 1031 | ms_type = |
| 1032 | cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT |
| 1033 | ? mst_data : mst_file_data; |
| 1034 | } |
| 1035 | else if (bfd_section->flags & SEC_ALLOC) |
| 1036 | { |
| 1037 | ms_type = |
| 1038 | cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT |
| 1039 | ? mst_bss : mst_file_bss; |
| 1040 | } |
| 1041 | else |
| 1042 | ms_type = mst_unknown; |
| 1043 | } |
| 1044 | |
| 1045 | msym = record_minimal_symbol (cs, tmpaddr, ms_type, |
| 1046 | sec, objfile); |
| 1047 | if (msym) |
| 1048 | gdbarch_coff_make_msymbol_special (gdbarch, |
| 1049 | cs->c_sclass, msym); |
| 1050 | |
| 1051 | if (SDB_TYPE (cs->c_type)) |
| 1052 | { |
| 1053 | struct symbol *sym; |
| 1054 | |
| 1055 | sym = process_coff_symbol |
| 1056 | (cs, &main_aux, objfile); |
| 1057 | SYMBOL_VALUE (sym) = tmpaddr + offset; |
| 1058 | SYMBOL_SECTION (sym) = sec; |
| 1059 | } |
| 1060 | } |
| 1061 | break; |
| 1062 | |
| 1063 | case C_FCN: |
| 1064 | if (strcmp (cs->c_name, ".bf") == 0) |
| 1065 | { |
| 1066 | within_function = 1; |
| 1067 | |
| 1068 | /* Value contains address of first non-init type |
| 1069 | code. */ |
| 1070 | /* main_aux.x_sym.x_misc.x_lnsz.x_lnno |
| 1071 | contains line number of '{' }. */ |
| 1072 | if (cs->c_naux != 1) |
| 1073 | complaint (&symfile_complaints, |
| 1074 | _("`.bf' symbol %d has no aux entry"), |
| 1075 | cs->c_symnum); |
| 1076 | fcn_first_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; |
| 1077 | fcn_first_line_addr = cs->c_value; |
| 1078 | |
| 1079 | /* Might want to check that locals are 0 and |
| 1080 | context_stack_depth is zero, and complain if not. */ |
| 1081 | |
| 1082 | depth = 0; |
| 1083 | newobj = push_context (depth, fcn_start_addr); |
| 1084 | fcn_cs_saved.c_name = getsymname (&fcn_sym_saved); |
| 1085 | newobj->name = |
| 1086 | process_coff_symbol (&fcn_cs_saved, |
| 1087 | &fcn_aux_saved, objfile); |
| 1088 | } |
| 1089 | else if (strcmp (cs->c_name, ".ef") == 0) |
| 1090 | { |
| 1091 | if (!within_function) |
| 1092 | error (_("Bad coff function information.")); |
| 1093 | /* The value of .ef is the address of epilogue code; |
| 1094 | not useful for gdb. */ |
| 1095 | /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno |
| 1096 | contains number of lines to '}' */ |
| 1097 | |
| 1098 | if (context_stack_depth <= 0) |
| 1099 | { /* We attempted to pop an empty context stack. */ |
| 1100 | complaint (&symfile_complaints, |
| 1101 | _("`.ef' symbol without matching `.bf' " |
| 1102 | "symbol ignored starting at symnum %d"), |
| 1103 | cs->c_symnum); |
| 1104 | within_function = 0; |
| 1105 | break; |
| 1106 | } |
| 1107 | |
| 1108 | newobj = pop_context (); |
| 1109 | /* Stack must be empty now. */ |
| 1110 | if (context_stack_depth > 0 || newobj == NULL) |
| 1111 | { |
| 1112 | complaint (&symfile_complaints, |
| 1113 | _("Unmatched .ef symbol(s) ignored " |
| 1114 | "starting at symnum %d"), |
| 1115 | cs->c_symnum); |
| 1116 | within_function = 0; |
| 1117 | break; |
| 1118 | } |
| 1119 | if (cs->c_naux != 1) |
| 1120 | { |
| 1121 | complaint (&symfile_complaints, |
| 1122 | _("`.ef' symbol %d has no aux entry"), |
| 1123 | cs->c_symnum); |
| 1124 | fcn_last_line = 0x7FFFFFFF; |
| 1125 | } |
| 1126 | else |
| 1127 | { |
| 1128 | fcn_last_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; |
| 1129 | } |
| 1130 | /* fcn_first_line is the line number of the opening '{'. |
| 1131 | Do not record it - because it would affect gdb's idea |
| 1132 | of the line number of the first statement of the |
| 1133 | function - except for one-line functions, for which |
| 1134 | it is also the line number of all the statements and |
| 1135 | of the closing '}', and for which we do not have any |
| 1136 | other statement-line-number. */ |
| 1137 | if (fcn_last_line == 1) |
| 1138 | record_line (current_subfile, fcn_first_line, |
| 1139 | gdbarch_addr_bits_remove (gdbarch, |
| 1140 | fcn_first_line_addr)); |
| 1141 | else |
| 1142 | enter_linenos (fcn_line_ptr, fcn_first_line, |
| 1143 | fcn_last_line, objfile); |
| 1144 | |
| 1145 | finish_block (newobj->name, &local_symbols, newobj->old_blocks, |
| 1146 | NULL, newobj->start_addr, |
| 1147 | fcn_cs_saved.c_value |
| 1148 | + fcn_aux_saved.x_sym.x_misc.x_fsize |
| 1149 | + ANOFFSET (objfile->section_offsets, |
| 1150 | SECT_OFF_TEXT (objfile))); |
| 1151 | within_function = 0; |
| 1152 | } |
| 1153 | break; |
| 1154 | |
| 1155 | case C_BLOCK: |
| 1156 | if (strcmp (cs->c_name, ".bb") == 0) |
| 1157 | { |
| 1158 | tmpaddr = cs->c_value; |
| 1159 | tmpaddr += ANOFFSET (objfile->section_offsets, |
| 1160 | SECT_OFF_TEXT (objfile)); |
| 1161 | push_context (++depth, tmpaddr); |
| 1162 | } |
| 1163 | else if (strcmp (cs->c_name, ".eb") == 0) |
| 1164 | { |
| 1165 | if (context_stack_depth <= 0) |
| 1166 | { /* We attempted to pop an empty context stack. */ |
| 1167 | complaint (&symfile_complaints, |
| 1168 | _("`.eb' symbol without matching `.bb' " |
| 1169 | "symbol ignored starting at symnum %d"), |
| 1170 | cs->c_symnum); |
| 1171 | break; |
| 1172 | } |
| 1173 | |
| 1174 | newobj = pop_context (); |
| 1175 | if (depth-- != newobj->depth) |
| 1176 | { |
| 1177 | complaint (&symfile_complaints, |
| 1178 | _("Mismatched .eb symbol ignored " |
| 1179 | "starting at symnum %d"), |
| 1180 | symnum); |
| 1181 | break; |
| 1182 | } |
| 1183 | if (local_symbols && context_stack_depth > 0) |
| 1184 | { |
| 1185 | tmpaddr = |
| 1186 | cs->c_value + ANOFFSET (objfile->section_offsets, |
| 1187 | SECT_OFF_TEXT (objfile)); |
| 1188 | /* Make a block for the local symbols within. */ |
| 1189 | finish_block (0, &local_symbols, newobj->old_blocks, NULL, |
| 1190 | newobj->start_addr, tmpaddr); |
| 1191 | } |
| 1192 | /* Now pop locals of block just finished. */ |
| 1193 | local_symbols = newobj->locals; |
| 1194 | } |
| 1195 | break; |
| 1196 | |
| 1197 | default: |
| 1198 | process_coff_symbol (cs, &main_aux, objfile); |
| 1199 | break; |
| 1200 | } |
| 1201 | } |
| 1202 | |
| 1203 | if ((nsyms == 0) && (pe_file)) |
| 1204 | { |
| 1205 | /* We've got no debugging symbols, but it's a portable |
| 1206 | executable, so try to read the export table. */ |
| 1207 | read_pe_exported_syms (objfile); |
| 1208 | } |
| 1209 | |
| 1210 | if (get_last_source_file ()) |
| 1211 | coff_end_symtab (objfile); |
| 1212 | |
| 1213 | /* Patch up any opaque types (references to types that are not defined |
| 1214 | in the file where they are referenced, e.g. "struct foo *bar"). */ |
| 1215 | { |
| 1216 | struct compunit_symtab *cu; |
| 1217 | struct symtab *s; |
| 1218 | |
| 1219 | ALL_OBJFILE_FILETABS (objfile, cu, s) |
| 1220 | patch_opaque_types (s); |
| 1221 | } |
| 1222 | |
| 1223 | coffread_objfile = NULL; |
| 1224 | } |
| 1225 | \f |
| 1226 | /* Routines for reading headers and symbols from executable. */ |
| 1227 | |
| 1228 | /* Read the next symbol, swap it, and return it in both |
| 1229 | internal_syment form, and coff_symbol form. Also return its first |
| 1230 | auxent, if any, in internal_auxent form, and skip any other |
| 1231 | auxents. */ |
| 1232 | |
| 1233 | static void |
| 1234 | read_one_sym (struct coff_symbol *cs, |
| 1235 | struct internal_syment *sym, |
| 1236 | union internal_auxent *aux) |
| 1237 | { |
| 1238 | int i; |
| 1239 | bfd_size_type bytes; |
| 1240 | |
| 1241 | cs->c_symnum = symnum; |
| 1242 | bytes = bfd_bread (temp_sym, local_symesz, nlist_bfd_global); |
| 1243 | if (bytes != local_symesz) |
| 1244 | error (_("%s: error reading symbols"), objfile_name (coffread_objfile)); |
| 1245 | bfd_coff_swap_sym_in (symfile_bfd, temp_sym, (char *) sym); |
| 1246 | cs->c_naux = sym->n_numaux & 0xff; |
| 1247 | if (cs->c_naux >= 1) |
| 1248 | { |
| 1249 | bytes = bfd_bread (temp_aux, local_auxesz, nlist_bfd_global); |
| 1250 | if (bytes != local_auxesz) |
| 1251 | error (_("%s: error reading symbols"), objfile_name (coffread_objfile)); |
| 1252 | bfd_coff_swap_aux_in (symfile_bfd, temp_aux, |
| 1253 | sym->n_type, sym->n_sclass, |
| 1254 | 0, cs->c_naux, (char *) aux); |
| 1255 | /* If more than one aux entry, read past it (only the first aux |
| 1256 | is important). */ |
| 1257 | for (i = 1; i < cs->c_naux; i++) |
| 1258 | { |
| 1259 | bytes = bfd_bread (temp_aux, local_auxesz, nlist_bfd_global); |
| 1260 | if (bytes != local_auxesz) |
| 1261 | error (_("%s: error reading symbols"), |
| 1262 | objfile_name (coffread_objfile)); |
| 1263 | } |
| 1264 | } |
| 1265 | cs->c_name = getsymname (sym); |
| 1266 | cs->c_value = sym->n_value; |
| 1267 | cs->c_sclass = (sym->n_sclass & 0xff); |
| 1268 | cs->c_secnum = sym->n_scnum; |
| 1269 | cs->c_type = (unsigned) sym->n_type; |
| 1270 | if (!SDB_TYPE (cs->c_type)) |
| 1271 | cs->c_type = 0; |
| 1272 | |
| 1273 | #if 0 |
| 1274 | if (cs->c_sclass & 128) |
| 1275 | printf (_("thumb symbol %s, class 0x%x\n"), cs->c_name, cs->c_sclass); |
| 1276 | #endif |
| 1277 | |
| 1278 | symnum += 1 + cs->c_naux; |
| 1279 | |
| 1280 | /* The PE file format stores symbol values as offsets within the |
| 1281 | section, rather than as absolute addresses. We correct that |
| 1282 | here, if the symbol has an appropriate storage class. FIXME: We |
| 1283 | should use BFD to read the symbols, rather than duplicating the |
| 1284 | work here. */ |
| 1285 | if (pe_file) |
| 1286 | { |
| 1287 | switch (cs->c_sclass) |
| 1288 | { |
| 1289 | case C_EXT: |
| 1290 | case C_THUMBEXT: |
| 1291 | case C_THUMBEXTFUNC: |
| 1292 | case C_SECTION: |
| 1293 | case C_NT_WEAK: |
| 1294 | case C_STAT: |
| 1295 | case C_THUMBSTAT: |
| 1296 | case C_THUMBSTATFUNC: |
| 1297 | case C_LABEL: |
| 1298 | case C_THUMBLABEL: |
| 1299 | case C_BLOCK: |
| 1300 | case C_FCN: |
| 1301 | case C_EFCN: |
| 1302 | if (cs->c_secnum != 0) |
| 1303 | cs->c_value += cs_section_address (cs, symfile_bfd); |
| 1304 | break; |
| 1305 | } |
| 1306 | } |
| 1307 | } |
| 1308 | \f |
| 1309 | /* Support for string table handling. */ |
| 1310 | |
| 1311 | static char *stringtab = NULL; |
| 1312 | |
| 1313 | static int |
| 1314 | init_stringtab (bfd *abfd, long offset) |
| 1315 | { |
| 1316 | long length; |
| 1317 | int val; |
| 1318 | unsigned char lengthbuf[4]; |
| 1319 | |
| 1320 | free_stringtab (); |
| 1321 | |
| 1322 | /* If the file is stripped, the offset might be zero, indicating no |
| 1323 | string table. Just return with `stringtab' set to null. */ |
| 1324 | if (offset == 0) |
| 1325 | return 0; |
| 1326 | |
| 1327 | if (bfd_seek (abfd, offset, 0) < 0) |
| 1328 | return -1; |
| 1329 | |
| 1330 | val = bfd_bread ((char *) lengthbuf, sizeof lengthbuf, abfd); |
| 1331 | length = bfd_h_get_32 (symfile_bfd, lengthbuf); |
| 1332 | |
| 1333 | /* If no string table is needed, then the file may end immediately |
| 1334 | after the symbols. Just return with `stringtab' set to null. */ |
| 1335 | if (val != sizeof lengthbuf || length < sizeof lengthbuf) |
| 1336 | return 0; |
| 1337 | |
| 1338 | stringtab = (char *) xmalloc (length); |
| 1339 | /* This is in target format (probably not very useful, and not |
| 1340 | currently used), not host format. */ |
| 1341 | memcpy (stringtab, lengthbuf, sizeof lengthbuf); |
| 1342 | if (length == sizeof length) /* Empty table -- just the count. */ |
| 1343 | return 0; |
| 1344 | |
| 1345 | val = bfd_bread (stringtab + sizeof lengthbuf, |
| 1346 | length - sizeof lengthbuf, abfd); |
| 1347 | if (val != length - sizeof lengthbuf || stringtab[length - 1] != '\0') |
| 1348 | return -1; |
| 1349 | |
| 1350 | return 0; |
| 1351 | } |
| 1352 | |
| 1353 | static void |
| 1354 | free_stringtab (void) |
| 1355 | { |
| 1356 | if (stringtab) |
| 1357 | xfree (stringtab); |
| 1358 | stringtab = NULL; |
| 1359 | } |
| 1360 | |
| 1361 | static void |
| 1362 | free_stringtab_cleanup (void *ignore) |
| 1363 | { |
| 1364 | free_stringtab (); |
| 1365 | } |
| 1366 | |
| 1367 | static char * |
| 1368 | getsymname (struct internal_syment *symbol_entry) |
| 1369 | { |
| 1370 | static char buffer[SYMNMLEN + 1]; |
| 1371 | char *result; |
| 1372 | |
| 1373 | if (symbol_entry->_n._n_n._n_zeroes == 0) |
| 1374 | { |
| 1375 | /* FIXME: Probably should be detecting corrupt symbol files by |
| 1376 | seeing whether offset points to within the stringtab. */ |
| 1377 | result = stringtab + symbol_entry->_n._n_n._n_offset; |
| 1378 | } |
| 1379 | else |
| 1380 | { |
| 1381 | strncpy (buffer, symbol_entry->_n._n_name, SYMNMLEN); |
| 1382 | buffer[SYMNMLEN] = '\0'; |
| 1383 | result = buffer; |
| 1384 | } |
| 1385 | return result; |
| 1386 | } |
| 1387 | |
| 1388 | /* Extract the file name from the aux entry of a C_FILE symbol. |
| 1389 | Return only the last component of the name. Result is in static |
| 1390 | storage and is only good for temporary use. */ |
| 1391 | |
| 1392 | static const char * |
| 1393 | coff_getfilename (union internal_auxent *aux_entry) |
| 1394 | { |
| 1395 | static char buffer[BUFSIZ]; |
| 1396 | const char *result; |
| 1397 | |
| 1398 | if (aux_entry->x_file.x_n.x_zeroes == 0) |
| 1399 | { |
| 1400 | if (strlen (stringtab + aux_entry->x_file.x_n.x_offset) >= BUFSIZ) |
| 1401 | internal_error (__FILE__, __LINE__, _("coff file name too long")); |
| 1402 | strcpy (buffer, stringtab + aux_entry->x_file.x_n.x_offset); |
| 1403 | } |
| 1404 | else |
| 1405 | { |
| 1406 | strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN); |
| 1407 | buffer[FILNMLEN] = '\0'; |
| 1408 | } |
| 1409 | result = buffer; |
| 1410 | |
| 1411 | /* FIXME: We should not be throwing away the information about what |
| 1412 | directory. It should go into dirname of the symtab, or some such |
| 1413 | place. */ |
| 1414 | result = lbasename (result); |
| 1415 | return (result); |
| 1416 | } |
| 1417 | \f |
| 1418 | /* Support for line number handling. */ |
| 1419 | |
| 1420 | static char *linetab = NULL; |
| 1421 | static long linetab_offset; |
| 1422 | static unsigned long linetab_size; |
| 1423 | |
| 1424 | /* Read in all the line numbers for fast lookups later. Leave them in |
| 1425 | external (unswapped) format in memory; we'll swap them as we enter |
| 1426 | them into GDB's data structures. */ |
| 1427 | |
| 1428 | static int |
| 1429 | init_lineno (bfd *abfd, long offset, int size) |
| 1430 | { |
| 1431 | int val; |
| 1432 | |
| 1433 | linetab_offset = offset; |
| 1434 | linetab_size = size; |
| 1435 | |
| 1436 | free_linetab (); |
| 1437 | |
| 1438 | if (size == 0) |
| 1439 | return 0; |
| 1440 | |
| 1441 | if (bfd_seek (abfd, offset, 0) < 0) |
| 1442 | return -1; |
| 1443 | |
| 1444 | /* Allocate the desired table, plus a sentinel. */ |
| 1445 | linetab = (char *) xmalloc (size + local_linesz); |
| 1446 | |
| 1447 | val = bfd_bread (linetab, size, abfd); |
| 1448 | if (val != size) |
| 1449 | return -1; |
| 1450 | |
| 1451 | /* Terminate it with an all-zero sentinel record. */ |
| 1452 | memset (linetab + size, 0, local_linesz); |
| 1453 | |
| 1454 | return 0; |
| 1455 | } |
| 1456 | |
| 1457 | static void |
| 1458 | free_linetab (void) |
| 1459 | { |
| 1460 | if (linetab) |
| 1461 | xfree (linetab); |
| 1462 | linetab = NULL; |
| 1463 | } |
| 1464 | |
| 1465 | static void |
| 1466 | free_linetab_cleanup (void *ignore) |
| 1467 | { |
| 1468 | free_linetab (); |
| 1469 | } |
| 1470 | |
| 1471 | #if !defined (L_LNNO32) |
| 1472 | #define L_LNNO32(lp) ((lp)->l_lnno) |
| 1473 | #endif |
| 1474 | |
| 1475 | static void |
| 1476 | enter_linenos (long file_offset, int first_line, |
| 1477 | int last_line, struct objfile *objfile) |
| 1478 | { |
| 1479 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 1480 | char *rawptr; |
| 1481 | struct internal_lineno lptr; |
| 1482 | |
| 1483 | if (!linetab) |
| 1484 | return; |
| 1485 | if (file_offset < linetab_offset) |
| 1486 | { |
| 1487 | complaint (&symfile_complaints, |
| 1488 | _("Line number pointer %ld lower than start of line numbers"), |
| 1489 | file_offset); |
| 1490 | if (file_offset > linetab_size) /* Too big to be an offset? */ |
| 1491 | return; |
| 1492 | file_offset += linetab_offset; /* Try reading at that linetab |
| 1493 | offset. */ |
| 1494 | } |
| 1495 | |
| 1496 | rawptr = &linetab[file_offset - linetab_offset]; |
| 1497 | |
| 1498 | /* Skip first line entry for each function. */ |
| 1499 | rawptr += local_linesz; |
| 1500 | /* Line numbers start at one for the first line of the function. */ |
| 1501 | first_line--; |
| 1502 | |
| 1503 | /* If the line number table is full (e.g. 64K lines in COFF debug |
| 1504 | info), the next function's L_LNNO32 might not be zero, so don't |
| 1505 | overstep the table's end in any case. */ |
| 1506 | while (rawptr <= &linetab[0] + linetab_size) |
| 1507 | { |
| 1508 | bfd_coff_swap_lineno_in (symfile_bfd, rawptr, &lptr); |
| 1509 | rawptr += local_linesz; |
| 1510 | /* The next function, or the sentinel, will have L_LNNO32 zero; |
| 1511 | we exit. */ |
| 1512 | if (L_LNNO32 (&lptr) && L_LNNO32 (&lptr) <= last_line) |
| 1513 | { |
| 1514 | CORE_ADDR addr = lptr.l_addr.l_paddr; |
| 1515 | addr += ANOFFSET (objfile->section_offsets, |
| 1516 | SECT_OFF_TEXT (objfile)); |
| 1517 | record_line (current_subfile, |
| 1518 | first_line + L_LNNO32 (&lptr), |
| 1519 | gdbarch_addr_bits_remove (gdbarch, addr)); |
| 1520 | } |
| 1521 | else |
| 1522 | break; |
| 1523 | } |
| 1524 | } |
| 1525 | \f |
| 1526 | static void |
| 1527 | patch_type (struct type *type, struct type *real_type) |
| 1528 | { |
| 1529 | struct type *target = TYPE_TARGET_TYPE (type); |
| 1530 | struct type *real_target = TYPE_TARGET_TYPE (real_type); |
| 1531 | int field_size = TYPE_NFIELDS (real_target) * sizeof (struct field); |
| 1532 | |
| 1533 | TYPE_LENGTH (target) = TYPE_LENGTH (real_target); |
| 1534 | TYPE_NFIELDS (target) = TYPE_NFIELDS (real_target); |
| 1535 | TYPE_FIELDS (target) = (struct field *) TYPE_ALLOC (target, |
| 1536 | field_size); |
| 1537 | |
| 1538 | memcpy (TYPE_FIELDS (target), |
| 1539 | TYPE_FIELDS (real_target), |
| 1540 | field_size); |
| 1541 | |
| 1542 | if (TYPE_NAME (real_target)) |
| 1543 | { |
| 1544 | /* The previous copy of TYPE_NAME is allocated by |
| 1545 | process_coff_symbol. */ |
| 1546 | if (TYPE_NAME (target)) |
| 1547 | xfree ((char*) TYPE_NAME (target)); |
| 1548 | TYPE_NAME (target) = xstrdup (TYPE_NAME (real_target)); |
| 1549 | } |
| 1550 | } |
| 1551 | |
| 1552 | /* Patch up all appropriate typedef symbols in the opaque_type_chains |
| 1553 | so that they can be used to print out opaque data structures |
| 1554 | properly. */ |
| 1555 | |
| 1556 | static void |
| 1557 | patch_opaque_types (struct symtab *s) |
| 1558 | { |
| 1559 | struct block *b; |
| 1560 | struct block_iterator iter; |
| 1561 | struct symbol *real_sym; |
| 1562 | |
| 1563 | /* Go through the per-file symbols only. */ |
| 1564 | b = BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (s), STATIC_BLOCK); |
| 1565 | ALL_BLOCK_SYMBOLS (b, iter, real_sym) |
| 1566 | { |
| 1567 | /* Find completed typedefs to use to fix opaque ones. |
| 1568 | Remove syms from the chain when their types are stored, |
| 1569 | but search the whole chain, as there may be several syms |
| 1570 | from different files with the same name. */ |
| 1571 | if (SYMBOL_CLASS (real_sym) == LOC_TYPEDEF |
| 1572 | && SYMBOL_DOMAIN (real_sym) == VAR_DOMAIN |
| 1573 | && TYPE_CODE (SYMBOL_TYPE (real_sym)) == TYPE_CODE_PTR |
| 1574 | && TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym))) != 0) |
| 1575 | { |
| 1576 | const char *name = SYMBOL_LINKAGE_NAME (real_sym); |
| 1577 | int hash = hashname (name); |
| 1578 | struct symbol *sym, *prev; |
| 1579 | |
| 1580 | prev = 0; |
| 1581 | for (sym = opaque_type_chain[hash]; sym;) |
| 1582 | { |
| 1583 | if (name[0] == SYMBOL_LINKAGE_NAME (sym)[0] |
| 1584 | && strcmp (name + 1, SYMBOL_LINKAGE_NAME (sym) + 1) == 0) |
| 1585 | { |
| 1586 | if (prev) |
| 1587 | { |
| 1588 | SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym); |
| 1589 | } |
| 1590 | else |
| 1591 | { |
| 1592 | opaque_type_chain[hash] = SYMBOL_VALUE_CHAIN (sym); |
| 1593 | } |
| 1594 | |
| 1595 | patch_type (SYMBOL_TYPE (sym), SYMBOL_TYPE (real_sym)); |
| 1596 | |
| 1597 | if (prev) |
| 1598 | { |
| 1599 | sym = SYMBOL_VALUE_CHAIN (prev); |
| 1600 | } |
| 1601 | else |
| 1602 | { |
| 1603 | sym = opaque_type_chain[hash]; |
| 1604 | } |
| 1605 | } |
| 1606 | else |
| 1607 | { |
| 1608 | prev = sym; |
| 1609 | sym = SYMBOL_VALUE_CHAIN (sym); |
| 1610 | } |
| 1611 | } |
| 1612 | } |
| 1613 | } |
| 1614 | } |
| 1615 | \f |
| 1616 | static int |
| 1617 | coff_reg_to_regnum (struct symbol *sym, struct gdbarch *gdbarch) |
| 1618 | { |
| 1619 | return gdbarch_sdb_reg_to_regnum (gdbarch, SYMBOL_VALUE (sym)); |
| 1620 | } |
| 1621 | |
| 1622 | static const struct symbol_register_ops coff_register_funcs = { |
| 1623 | coff_reg_to_regnum |
| 1624 | }; |
| 1625 | |
| 1626 | /* The "aclass" index for computed COFF symbols. */ |
| 1627 | |
| 1628 | static int coff_register_index; |
| 1629 | |
| 1630 | static struct symbol * |
| 1631 | process_coff_symbol (struct coff_symbol *cs, |
| 1632 | union internal_auxent *aux, |
| 1633 | struct objfile *objfile) |
| 1634 | { |
| 1635 | struct symbol *sym = allocate_symbol (objfile); |
| 1636 | char *name; |
| 1637 | |
| 1638 | name = cs->c_name; |
| 1639 | name = EXTERNAL_NAME (name, objfile->obfd); |
| 1640 | SYMBOL_SET_LANGUAGE (sym, current_subfile->language, |
| 1641 | &objfile->objfile_obstack); |
| 1642 | SYMBOL_SET_NAMES (sym, name, strlen (name), 1, objfile); |
| 1643 | |
| 1644 | /* default assumptions */ |
| 1645 | SYMBOL_VALUE (sym) = cs->c_value; |
| 1646 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
| 1647 | SYMBOL_SECTION (sym) = cs_to_section (cs, objfile); |
| 1648 | |
| 1649 | if (ISFCN (cs->c_type)) |
| 1650 | { |
| 1651 | SYMBOL_VALUE (sym) += ANOFFSET (objfile->section_offsets, |
| 1652 | SECT_OFF_TEXT (objfile)); |
| 1653 | SYMBOL_TYPE (sym) = |
| 1654 | lookup_function_type (decode_function_type (cs, cs->c_type, |
| 1655 | aux, objfile)); |
| 1656 | |
| 1657 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
| 1658 | if (cs->c_sclass == C_STAT || cs->c_sclass == C_THUMBSTAT |
| 1659 | || cs->c_sclass == C_THUMBSTATFUNC) |
| 1660 | add_symbol_to_list (sym, &file_symbols); |
| 1661 | else if (cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT |
| 1662 | || cs->c_sclass == C_THUMBEXTFUNC) |
| 1663 | add_symbol_to_list (sym, &global_symbols); |
| 1664 | } |
| 1665 | else |
| 1666 | { |
| 1667 | SYMBOL_TYPE (sym) = decode_type (cs, cs->c_type, aux, objfile); |
| 1668 | switch (cs->c_sclass) |
| 1669 | { |
| 1670 | case C_NULL: |
| 1671 | break; |
| 1672 | |
| 1673 | case C_AUTO: |
| 1674 | SYMBOL_ACLASS_INDEX (sym) = LOC_LOCAL; |
| 1675 | add_symbol_to_list (sym, &local_symbols); |
| 1676 | break; |
| 1677 | |
| 1678 | case C_THUMBEXT: |
| 1679 | case C_THUMBEXTFUNC: |
| 1680 | case C_EXT: |
| 1681 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
| 1682 | SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; |
| 1683 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, |
| 1684 | SECT_OFF_TEXT (objfile)); |
| 1685 | add_symbol_to_list (sym, &global_symbols); |
| 1686 | break; |
| 1687 | |
| 1688 | case C_THUMBSTAT: |
| 1689 | case C_THUMBSTATFUNC: |
| 1690 | case C_STAT: |
| 1691 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
| 1692 | SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; |
| 1693 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, |
| 1694 | SECT_OFF_TEXT (objfile)); |
| 1695 | if (within_function) |
| 1696 | { |
| 1697 | /* Static symbol of local scope. */ |
| 1698 | add_symbol_to_list (sym, &local_symbols); |
| 1699 | } |
| 1700 | else |
| 1701 | { |
| 1702 | /* Static symbol at top level of file. */ |
| 1703 | add_symbol_to_list (sym, &file_symbols); |
| 1704 | } |
| 1705 | break; |
| 1706 | |
| 1707 | #ifdef C_GLBLREG /* AMD coff */ |
| 1708 | case C_GLBLREG: |
| 1709 | #endif |
| 1710 | case C_REG: |
| 1711 | SYMBOL_ACLASS_INDEX (sym) = coff_register_index; |
| 1712 | SYMBOL_VALUE (sym) = cs->c_value; |
| 1713 | add_symbol_to_list (sym, &local_symbols); |
| 1714 | break; |
| 1715 | |
| 1716 | case C_THUMBLABEL: |
| 1717 | case C_LABEL: |
| 1718 | break; |
| 1719 | |
| 1720 | case C_ARG: |
| 1721 | SYMBOL_ACLASS_INDEX (sym) = LOC_ARG; |
| 1722 | SYMBOL_IS_ARGUMENT (sym) = 1; |
| 1723 | add_symbol_to_list (sym, &local_symbols); |
| 1724 | break; |
| 1725 | |
| 1726 | case C_REGPARM: |
| 1727 | SYMBOL_ACLASS_INDEX (sym) = coff_register_index; |
| 1728 | SYMBOL_IS_ARGUMENT (sym) = 1; |
| 1729 | SYMBOL_VALUE (sym) = cs->c_value; |
| 1730 | add_symbol_to_list (sym, &local_symbols); |
| 1731 | break; |
| 1732 | |
| 1733 | case C_TPDEF: |
| 1734 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
| 1735 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
| 1736 | |
| 1737 | /* If type has no name, give it one. */ |
| 1738 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) |
| 1739 | { |
| 1740 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR |
| 1741 | || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC) |
| 1742 | { |
| 1743 | /* If we are giving a name to a type such as |
| 1744 | "pointer to foo" or "function returning foo", we |
| 1745 | better not set the TYPE_NAME. If the program |
| 1746 | contains "typedef char *caddr_t;", we don't want |
| 1747 | all variables of type char * to print as caddr_t. |
| 1748 | This is not just a consequence of GDB's type |
| 1749 | management; CC and GCC (at least through version |
| 1750 | 2.4) both output variables of either type char * |
| 1751 | or caddr_t with the type refering to the C_TPDEF |
| 1752 | symbol for caddr_t. If a future compiler cleans |
| 1753 | this up it GDB is not ready for it yet, but if it |
| 1754 | becomes ready we somehow need to disable this |
| 1755 | check (without breaking the PCC/GCC2.4 case). |
| 1756 | |
| 1757 | Sigh. |
| 1758 | |
| 1759 | Fortunately, this check seems not to be necessary |
| 1760 | for anything except pointers or functions. */ |
| 1761 | ; |
| 1762 | } |
| 1763 | else |
| 1764 | TYPE_NAME (SYMBOL_TYPE (sym)) = |
| 1765 | xstrdup (SYMBOL_LINKAGE_NAME (sym)); |
| 1766 | } |
| 1767 | |
| 1768 | /* Keep track of any type which points to empty structured |
| 1769 | type, so it can be filled from a definition from another |
| 1770 | file. A simple forward reference (TYPE_CODE_UNDEF) is |
| 1771 | not an empty structured type, though; the forward |
| 1772 | references work themselves out via the magic of |
| 1773 | coff_lookup_type. */ |
| 1774 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR |
| 1775 | && TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) == 0 |
| 1776 | && TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) |
| 1777 | != TYPE_CODE_UNDEF) |
| 1778 | { |
| 1779 | int i = hashname (SYMBOL_LINKAGE_NAME (sym)); |
| 1780 | |
| 1781 | SYMBOL_VALUE_CHAIN (sym) = opaque_type_chain[i]; |
| 1782 | opaque_type_chain[i] = sym; |
| 1783 | } |
| 1784 | add_symbol_to_list (sym, &file_symbols); |
| 1785 | break; |
| 1786 | |
| 1787 | case C_STRTAG: |
| 1788 | case C_UNTAG: |
| 1789 | case C_ENTAG: |
| 1790 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
| 1791 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
| 1792 | |
| 1793 | /* Some compilers try to be helpful by inventing "fake" |
| 1794 | names for anonymous enums, structures, and unions, like |
| 1795 | "~0fake" or ".0fake". Thanks, but no thanks... */ |
| 1796 | if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0) |
| 1797 | if (SYMBOL_LINKAGE_NAME (sym) != NULL |
| 1798 | && *SYMBOL_LINKAGE_NAME (sym) != '~' |
| 1799 | && *SYMBOL_LINKAGE_NAME (sym) != '.') |
| 1800 | TYPE_TAG_NAME (SYMBOL_TYPE (sym)) = |
| 1801 | concat (SYMBOL_LINKAGE_NAME (sym), (char *)NULL); |
| 1802 | |
| 1803 | add_symbol_to_list (sym, &file_symbols); |
| 1804 | break; |
| 1805 | |
| 1806 | default: |
| 1807 | break; |
| 1808 | } |
| 1809 | } |
| 1810 | return sym; |
| 1811 | } |
| 1812 | \f |
| 1813 | /* Decode a coff type specifier; return the type that is meant. */ |
| 1814 | |
| 1815 | static struct type * |
| 1816 | decode_type (struct coff_symbol *cs, unsigned int c_type, |
| 1817 | union internal_auxent *aux, struct objfile *objfile) |
| 1818 | { |
| 1819 | struct type *type = 0; |
| 1820 | unsigned int new_c_type; |
| 1821 | |
| 1822 | if (c_type & ~N_BTMASK) |
| 1823 | { |
| 1824 | new_c_type = DECREF (c_type); |
| 1825 | if (ISPTR (c_type)) |
| 1826 | { |
| 1827 | type = decode_type (cs, new_c_type, aux, objfile); |
| 1828 | type = lookup_pointer_type (type); |
| 1829 | } |
| 1830 | else if (ISFCN (c_type)) |
| 1831 | { |
| 1832 | type = decode_type (cs, new_c_type, aux, objfile); |
| 1833 | type = lookup_function_type (type); |
| 1834 | } |
| 1835 | else if (ISARY (c_type)) |
| 1836 | { |
| 1837 | int i, n; |
| 1838 | unsigned short *dim; |
| 1839 | struct type *base_type, *index_type, *range_type; |
| 1840 | |
| 1841 | /* Define an array type. */ |
| 1842 | /* auxent refers to array, not base type. */ |
| 1843 | if (aux->x_sym.x_tagndx.l == 0) |
| 1844 | cs->c_naux = 0; |
| 1845 | |
| 1846 | /* Shift the indices down. */ |
| 1847 | dim = &aux->x_sym.x_fcnary.x_ary.x_dimen[0]; |
| 1848 | i = 1; |
| 1849 | n = dim[0]; |
| 1850 | for (i = 0; *dim && i < DIMNUM - 1; i++, dim++) |
| 1851 | *dim = *(dim + 1); |
| 1852 | *dim = 0; |
| 1853 | |
| 1854 | base_type = decode_type (cs, new_c_type, aux, objfile); |
| 1855 | index_type = objfile_type (objfile)->builtin_int; |
| 1856 | range_type |
| 1857 | = create_static_range_type ((struct type *) NULL, |
| 1858 | index_type, 0, n - 1); |
| 1859 | type = |
| 1860 | create_array_type ((struct type *) NULL, |
| 1861 | base_type, range_type); |
| 1862 | } |
| 1863 | return type; |
| 1864 | } |
| 1865 | |
| 1866 | /* Reference to existing type. This only occurs with the struct, |
| 1867 | union, and enum types. EPI a29k coff fakes us out by producing |
| 1868 | aux entries with a nonzero x_tagndx for definitions of structs, |
| 1869 | unions, and enums, so we have to check the c_sclass field. SCO |
| 1870 | 3.2v4 cc gets confused with pointers to pointers to defined |
| 1871 | structs, and generates negative x_tagndx fields. */ |
| 1872 | if (cs->c_naux > 0 && aux->x_sym.x_tagndx.l != 0) |
| 1873 | { |
| 1874 | if (cs->c_sclass != C_STRTAG |
| 1875 | && cs->c_sclass != C_UNTAG |
| 1876 | && cs->c_sclass != C_ENTAG |
| 1877 | && aux->x_sym.x_tagndx.l >= 0) |
| 1878 | { |
| 1879 | type = coff_alloc_type (aux->x_sym.x_tagndx.l); |
| 1880 | return type; |
| 1881 | } |
| 1882 | else |
| 1883 | { |
| 1884 | complaint (&symfile_complaints, |
| 1885 | _("Symbol table entry for %s has bad tagndx value"), |
| 1886 | cs->c_name); |
| 1887 | /* And fall through to decode_base_type... */ |
| 1888 | } |
| 1889 | } |
| 1890 | |
| 1891 | return decode_base_type (cs, BTYPE (c_type), aux, objfile); |
| 1892 | } |
| 1893 | |
| 1894 | /* Decode a coff type specifier for function definition; |
| 1895 | return the type that the function returns. */ |
| 1896 | |
| 1897 | static struct type * |
| 1898 | decode_function_type (struct coff_symbol *cs, |
| 1899 | unsigned int c_type, |
| 1900 | union internal_auxent *aux, |
| 1901 | struct objfile *objfile) |
| 1902 | { |
| 1903 | if (aux->x_sym.x_tagndx.l == 0) |
| 1904 | cs->c_naux = 0; /* auxent refers to function, not base |
| 1905 | type. */ |
| 1906 | |
| 1907 | return decode_type (cs, DECREF (c_type), aux, objfile); |
| 1908 | } |
| 1909 | \f |
| 1910 | /* Basic C types. */ |
| 1911 | |
| 1912 | static struct type * |
| 1913 | decode_base_type (struct coff_symbol *cs, |
| 1914 | unsigned int c_type, |
| 1915 | union internal_auxent *aux, |
| 1916 | struct objfile *objfile) |
| 1917 | { |
| 1918 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 1919 | struct type *type; |
| 1920 | |
| 1921 | switch (c_type) |
| 1922 | { |
| 1923 | case T_NULL: |
| 1924 | /* Shows up with "void (*foo)();" structure members. */ |
| 1925 | return objfile_type (objfile)->builtin_void; |
| 1926 | |
| 1927 | #ifdef T_VOID |
| 1928 | case T_VOID: |
| 1929 | /* Intel 960 COFF has this symbol and meaning. */ |
| 1930 | return objfile_type (objfile)->builtin_void; |
| 1931 | #endif |
| 1932 | |
| 1933 | case T_CHAR: |
| 1934 | return objfile_type (objfile)->builtin_char; |
| 1935 | |
| 1936 | case T_SHORT: |
| 1937 | return objfile_type (objfile)->builtin_short; |
| 1938 | |
| 1939 | case T_INT: |
| 1940 | return objfile_type (objfile)->builtin_int; |
| 1941 | |
| 1942 | case T_LONG: |
| 1943 | if (cs->c_sclass == C_FIELD |
| 1944 | && aux->x_sym.x_misc.x_lnsz.x_size |
| 1945 | > gdbarch_long_bit (gdbarch)) |
| 1946 | return objfile_type (objfile)->builtin_long_long; |
| 1947 | else |
| 1948 | return objfile_type (objfile)->builtin_long; |
| 1949 | |
| 1950 | case T_FLOAT: |
| 1951 | return objfile_type (objfile)->builtin_float; |
| 1952 | |
| 1953 | case T_DOUBLE: |
| 1954 | return objfile_type (objfile)->builtin_double; |
| 1955 | |
| 1956 | case T_LNGDBL: |
| 1957 | return objfile_type (objfile)->builtin_long_double; |
| 1958 | |
| 1959 | case T_STRUCT: |
| 1960 | if (cs->c_naux != 1) |
| 1961 | { |
| 1962 | /* Anonymous structure type. */ |
| 1963 | type = coff_alloc_type (cs->c_symnum); |
| 1964 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
| 1965 | TYPE_NAME (type) = NULL; |
| 1966 | /* This used to set the tag to "<opaque>". But I think |
| 1967 | setting it to NULL is right, and the printing code can |
| 1968 | print it as "struct {...}". */ |
| 1969 | TYPE_TAG_NAME (type) = NULL; |
| 1970 | INIT_CPLUS_SPECIFIC (type); |
| 1971 | TYPE_LENGTH (type) = 0; |
| 1972 | TYPE_FIELDS (type) = 0; |
| 1973 | TYPE_NFIELDS (type) = 0; |
| 1974 | } |
| 1975 | else |
| 1976 | { |
| 1977 | type = coff_read_struct_type (cs->c_symnum, |
| 1978 | aux->x_sym.x_misc.x_lnsz.x_size, |
| 1979 | aux->x_sym.x_fcnary.x_fcn.x_endndx.l, |
| 1980 | objfile); |
| 1981 | } |
| 1982 | return type; |
| 1983 | |
| 1984 | case T_UNION: |
| 1985 | if (cs->c_naux != 1) |
| 1986 | { |
| 1987 | /* Anonymous union type. */ |
| 1988 | type = coff_alloc_type (cs->c_symnum); |
| 1989 | TYPE_NAME (type) = NULL; |
| 1990 | /* This used to set the tag to "<opaque>". But I think |
| 1991 | setting it to NULL is right, and the printing code can |
| 1992 | print it as "union {...}". */ |
| 1993 | TYPE_TAG_NAME (type) = NULL; |
| 1994 | INIT_CPLUS_SPECIFIC (type); |
| 1995 | TYPE_LENGTH (type) = 0; |
| 1996 | TYPE_FIELDS (type) = 0; |
| 1997 | TYPE_NFIELDS (type) = 0; |
| 1998 | } |
| 1999 | else |
| 2000 | { |
| 2001 | type = coff_read_struct_type (cs->c_symnum, |
| 2002 | aux->x_sym.x_misc.x_lnsz.x_size, |
| 2003 | aux->x_sym.x_fcnary.x_fcn.x_endndx.l, |
| 2004 | objfile); |
| 2005 | } |
| 2006 | TYPE_CODE (type) = TYPE_CODE_UNION; |
| 2007 | return type; |
| 2008 | |
| 2009 | case T_ENUM: |
| 2010 | if (cs->c_naux != 1) |
| 2011 | { |
| 2012 | /* Anonymous enum type. */ |
| 2013 | type = coff_alloc_type (cs->c_symnum); |
| 2014 | TYPE_CODE (type) = TYPE_CODE_ENUM; |
| 2015 | TYPE_NAME (type) = NULL; |
| 2016 | /* This used to set the tag to "<opaque>". But I think |
| 2017 | setting it to NULL is right, and the printing code can |
| 2018 | print it as "enum {...}". */ |
| 2019 | TYPE_TAG_NAME (type) = NULL; |
| 2020 | TYPE_LENGTH (type) = 0; |
| 2021 | TYPE_FIELDS (type) = 0; |
| 2022 | TYPE_NFIELDS (type) = 0; |
| 2023 | } |
| 2024 | else |
| 2025 | { |
| 2026 | type = coff_read_enum_type (cs->c_symnum, |
| 2027 | aux->x_sym.x_misc.x_lnsz.x_size, |
| 2028 | aux->x_sym.x_fcnary.x_fcn.x_endndx.l, |
| 2029 | objfile); |
| 2030 | } |
| 2031 | return type; |
| 2032 | |
| 2033 | case T_MOE: |
| 2034 | /* Shouldn't show up here. */ |
| 2035 | break; |
| 2036 | |
| 2037 | case T_UCHAR: |
| 2038 | return objfile_type (objfile)->builtin_unsigned_char; |
| 2039 | |
| 2040 | case T_USHORT: |
| 2041 | return objfile_type (objfile)->builtin_unsigned_short; |
| 2042 | |
| 2043 | case T_UINT: |
| 2044 | return objfile_type (objfile)->builtin_unsigned_int; |
| 2045 | |
| 2046 | case T_ULONG: |
| 2047 | if (cs->c_sclass == C_FIELD |
| 2048 | && aux->x_sym.x_misc.x_lnsz.x_size |
| 2049 | > gdbarch_long_bit (gdbarch)) |
| 2050 | return objfile_type (objfile)->builtin_unsigned_long_long; |
| 2051 | else |
| 2052 | return objfile_type (objfile)->builtin_unsigned_long; |
| 2053 | } |
| 2054 | complaint (&symfile_complaints, |
| 2055 | _("Unexpected type for symbol %s"), cs->c_name); |
| 2056 | return objfile_type (objfile)->builtin_void; |
| 2057 | } |
| 2058 | \f |
| 2059 | /* This page contains subroutines of read_type. */ |
| 2060 | |
| 2061 | /* Read the description of a structure (or union type) and return an |
| 2062 | object describing the type. */ |
| 2063 | |
| 2064 | static struct type * |
| 2065 | coff_read_struct_type (int index, int length, int lastsym, |
| 2066 | struct objfile *objfile) |
| 2067 | { |
| 2068 | struct nextfield |
| 2069 | { |
| 2070 | struct nextfield *next; |
| 2071 | struct field field; |
| 2072 | }; |
| 2073 | |
| 2074 | struct type *type; |
| 2075 | struct nextfield *list = 0; |
| 2076 | struct nextfield *newobj; |
| 2077 | int nfields = 0; |
| 2078 | int n; |
| 2079 | char *name; |
| 2080 | struct coff_symbol member_sym; |
| 2081 | struct coff_symbol *ms = &member_sym; |
| 2082 | struct internal_syment sub_sym; |
| 2083 | union internal_auxent sub_aux; |
| 2084 | int done = 0; |
| 2085 | |
| 2086 | type = coff_alloc_type (index); |
| 2087 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
| 2088 | INIT_CPLUS_SPECIFIC (type); |
| 2089 | TYPE_LENGTH (type) = length; |
| 2090 | |
| 2091 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) |
| 2092 | { |
| 2093 | read_one_sym (ms, &sub_sym, &sub_aux); |
| 2094 | name = ms->c_name; |
| 2095 | name = EXTERNAL_NAME (name, objfile->obfd); |
| 2096 | |
| 2097 | switch (ms->c_sclass) |
| 2098 | { |
| 2099 | case C_MOS: |
| 2100 | case C_MOU: |
| 2101 | |
| 2102 | /* Get space to record the next field's data. */ |
| 2103 | newobj = XALLOCA (struct nextfield); |
| 2104 | newobj->next = list; |
| 2105 | list = newobj; |
| 2106 | |
| 2107 | /* Save the data. */ |
| 2108 | list->field.name |
| 2109 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, |
| 2110 | name, strlen (name)); |
| 2111 | FIELD_TYPE (list->field) = decode_type (ms, ms->c_type, |
| 2112 | &sub_aux, objfile); |
| 2113 | SET_FIELD_BITPOS (list->field, 8 * ms->c_value); |
| 2114 | FIELD_BITSIZE (list->field) = 0; |
| 2115 | nfields++; |
| 2116 | break; |
| 2117 | |
| 2118 | case C_FIELD: |
| 2119 | |
| 2120 | /* Get space to record the next field's data. */ |
| 2121 | newobj = XALLOCA (struct nextfield); |
| 2122 | newobj->next = list; |
| 2123 | list = newobj; |
| 2124 | |
| 2125 | /* Save the data. */ |
| 2126 | list->field.name |
| 2127 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, |
| 2128 | name, strlen (name)); |
| 2129 | FIELD_TYPE (list->field) = decode_type (ms, ms->c_type, |
| 2130 | &sub_aux, objfile); |
| 2131 | SET_FIELD_BITPOS (list->field, ms->c_value); |
| 2132 | FIELD_BITSIZE (list->field) = sub_aux.x_sym.x_misc.x_lnsz.x_size; |
| 2133 | nfields++; |
| 2134 | break; |
| 2135 | |
| 2136 | case C_EOS: |
| 2137 | done = 1; |
| 2138 | break; |
| 2139 | } |
| 2140 | } |
| 2141 | /* Now create the vector of fields, and record how big it is. */ |
| 2142 | |
| 2143 | TYPE_NFIELDS (type) = nfields; |
| 2144 | TYPE_FIELDS (type) = (struct field *) |
| 2145 | TYPE_ALLOC (type, sizeof (struct field) * nfields); |
| 2146 | |
| 2147 | /* Copy the saved-up fields into the field vector. */ |
| 2148 | |
| 2149 | for (n = nfields; list; list = list->next) |
| 2150 | TYPE_FIELD (type, --n) = list->field; |
| 2151 | |
| 2152 | return type; |
| 2153 | } |
| 2154 | \f |
| 2155 | /* Read a definition of an enumeration type, |
| 2156 | and create and return a suitable type object. |
| 2157 | Also defines the symbols that represent the values of the type. */ |
| 2158 | |
| 2159 | static struct type * |
| 2160 | coff_read_enum_type (int index, int length, int lastsym, |
| 2161 | struct objfile *objfile) |
| 2162 | { |
| 2163 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 2164 | struct symbol *sym; |
| 2165 | struct type *type; |
| 2166 | int nsyms = 0; |
| 2167 | int done = 0; |
| 2168 | struct pending **symlist; |
| 2169 | struct coff_symbol member_sym; |
| 2170 | struct coff_symbol *ms = &member_sym; |
| 2171 | struct internal_syment sub_sym; |
| 2172 | union internal_auxent sub_aux; |
| 2173 | struct pending *osyms, *syms; |
| 2174 | int o_nsyms; |
| 2175 | int n; |
| 2176 | char *name; |
| 2177 | int unsigned_enum = 1; |
| 2178 | |
| 2179 | type = coff_alloc_type (index); |
| 2180 | if (within_function) |
| 2181 | symlist = &local_symbols; |
| 2182 | else |
| 2183 | symlist = &file_symbols; |
| 2184 | osyms = *symlist; |
| 2185 | o_nsyms = osyms ? osyms->nsyms : 0; |
| 2186 | |
| 2187 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) |
| 2188 | { |
| 2189 | read_one_sym (ms, &sub_sym, &sub_aux); |
| 2190 | name = ms->c_name; |
| 2191 | name = EXTERNAL_NAME (name, objfile->obfd); |
| 2192 | |
| 2193 | switch (ms->c_sclass) |
| 2194 | { |
| 2195 | case C_MOE: |
| 2196 | sym = allocate_symbol (objfile); |
| 2197 | |
| 2198 | name = (char *) obstack_copy0 (&objfile->objfile_obstack, name, |
| 2199 | strlen (name)); |
| 2200 | SYMBOL_SET_LINKAGE_NAME (sym, name); |
| 2201 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
| 2202 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
| 2203 | SYMBOL_VALUE (sym) = ms->c_value; |
| 2204 | add_symbol_to_list (sym, symlist); |
| 2205 | nsyms++; |
| 2206 | break; |
| 2207 | |
| 2208 | case C_EOS: |
| 2209 | /* Sometimes the linker (on 386/ix 2.0.2 at least) screws |
| 2210 | up the count of how many symbols to read. So stop |
| 2211 | on .eos. */ |
| 2212 | done = 1; |
| 2213 | break; |
| 2214 | } |
| 2215 | } |
| 2216 | |
| 2217 | /* Now fill in the fields of the type-structure. */ |
| 2218 | |
| 2219 | if (length > 0) |
| 2220 | TYPE_LENGTH (type) = length; |
| 2221 | else /* Assume ints. */ |
| 2222 | TYPE_LENGTH (type) = gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT; |
| 2223 | TYPE_CODE (type) = TYPE_CODE_ENUM; |
| 2224 | TYPE_NFIELDS (type) = nsyms; |
| 2225 | TYPE_FIELDS (type) = (struct field *) |
| 2226 | TYPE_ALLOC (type, sizeof (struct field) * nsyms); |
| 2227 | |
| 2228 | /* Find the symbols for the values and put them into the type. |
| 2229 | The symbols can be found in the symlist that we put them on |
| 2230 | to cause them to be defined. osyms contains the old value |
| 2231 | of that symlist; everything up to there was defined by us. */ |
| 2232 | /* Note that we preserve the order of the enum constants, so |
| 2233 | that in something like "enum {FOO, LAST_THING=FOO}" we print |
| 2234 | FOO, not LAST_THING. */ |
| 2235 | |
| 2236 | for (syms = *symlist, n = 0; syms; syms = syms->next) |
| 2237 | { |
| 2238 | int j = 0; |
| 2239 | |
| 2240 | if (syms == osyms) |
| 2241 | j = o_nsyms; |
| 2242 | for (; j < syms->nsyms; j++, n++) |
| 2243 | { |
| 2244 | struct symbol *xsym = syms->symbol[j]; |
| 2245 | |
| 2246 | SYMBOL_TYPE (xsym) = type; |
| 2247 | TYPE_FIELD_NAME (type, n) = SYMBOL_LINKAGE_NAME (xsym); |
| 2248 | SET_FIELD_ENUMVAL (TYPE_FIELD (type, n), SYMBOL_VALUE (xsym)); |
| 2249 | if (SYMBOL_VALUE (xsym) < 0) |
| 2250 | unsigned_enum = 0; |
| 2251 | TYPE_FIELD_BITSIZE (type, n) = 0; |
| 2252 | } |
| 2253 | if (syms == osyms) |
| 2254 | break; |
| 2255 | } |
| 2256 | |
| 2257 | if (unsigned_enum) |
| 2258 | TYPE_UNSIGNED (type) = 1; |
| 2259 | |
| 2260 | return type; |
| 2261 | } |
| 2262 | |
| 2263 | /* Register our ability to parse symbols for coff BFD files. */ |
| 2264 | |
| 2265 | static const struct sym_fns coff_sym_fns = |
| 2266 | { |
| 2267 | coff_new_init, /* sym_new_init: init anything gbl to |
| 2268 | entire symtab */ |
| 2269 | coff_symfile_init, /* sym_init: read initial info, setup |
| 2270 | for sym_read() */ |
| 2271 | coff_symfile_read, /* sym_read: read a symbol file into |
| 2272 | symtab */ |
| 2273 | NULL, /* sym_read_psymbols */ |
| 2274 | coff_symfile_finish, /* sym_finish: finished with file, |
| 2275 | cleanup */ |
| 2276 | default_symfile_offsets, /* sym_offsets: xlate external to |
| 2277 | internal form */ |
| 2278 | default_symfile_segments, /* sym_segments: Get segment |
| 2279 | information from a file */ |
| 2280 | NULL, /* sym_read_linetable */ |
| 2281 | |
| 2282 | default_symfile_relocate, /* sym_relocate: Relocate a debug |
| 2283 | section. */ |
| 2284 | NULL, /* sym_probe_fns */ |
| 2285 | &psym_functions |
| 2286 | }; |
| 2287 | |
| 2288 | /* Free the per-objfile COFF data. */ |
| 2289 | |
| 2290 | static void |
| 2291 | coff_free_info (struct objfile *objfile, void *arg) |
| 2292 | { |
| 2293 | xfree (arg); |
| 2294 | } |
| 2295 | |
| 2296 | void |
| 2297 | _initialize_coffread (void) |
| 2298 | { |
| 2299 | add_symtab_fns (bfd_target_coff_flavour, &coff_sym_fns); |
| 2300 | |
| 2301 | coff_objfile_data_key = register_objfile_data_with_cleanup (NULL, |
| 2302 | coff_free_info); |
| 2303 | |
| 2304 | coff_register_index |
| 2305 | = register_symbol_register_impl (LOC_REGISTER, &coff_register_funcs); |
| 2306 | } |