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