| 1 | /* stabs.c -- Parse COFF debugging information |
| 2 | Copyright (C) 1996-2017 Free Software Foundation, Inc. |
| 3 | Written by Ian Lance Taylor <ian@cygnus.com>. |
| 4 | |
| 5 | This file is part of GNU Binutils. |
| 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, write to the Free Software |
| 19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA |
| 20 | 02110-1301, USA. */ |
| 21 | |
| 22 | /* This file contains code which parses COFF debugging information. */ |
| 23 | |
| 24 | #include "sysdep.h" |
| 25 | #include "bfd.h" |
| 26 | #include "coff/internal.h" |
| 27 | #include "libiberty.h" |
| 28 | #include "bucomm.h" |
| 29 | #include "debug.h" |
| 30 | #include "budbg.h" |
| 31 | |
| 32 | /* FIXME: We should not need this BFD internal file. We need it for |
| 33 | the N_BTMASK, etc., values. */ |
| 34 | #include "libcoff.h" |
| 35 | |
| 36 | /* These macros extract the right mask and shifts for this BFD. They |
| 37 | assume that there is a local variable named ABFD. This is so that |
| 38 | macros like ISFCN and DECREF, from coff/internal.h, will work |
| 39 | without modification. */ |
| 40 | #define N_BTMASK (coff_data (abfd)->local_n_btmask) |
| 41 | #define N_BTSHFT (coff_data (abfd)->local_n_btshft) |
| 42 | #define N_TMASK (coff_data (abfd)->local_n_tmask) |
| 43 | #define N_TSHIFT (coff_data (abfd)->local_n_tshift) |
| 44 | |
| 45 | /* This structure is used to hold the symbols, as well as the current |
| 46 | location within the symbols. */ |
| 47 | |
| 48 | struct coff_symbols |
| 49 | { |
| 50 | /* The symbols. */ |
| 51 | asymbol **syms; |
| 52 | /* The number of symbols. */ |
| 53 | long symcount; |
| 54 | /* The index of the current symbol. */ |
| 55 | long symno; |
| 56 | /* The index of the current symbol in the COFF symbol table (where |
| 57 | each auxent counts as a symbol). */ |
| 58 | long coff_symno; |
| 59 | }; |
| 60 | |
| 61 | /* The largest basic type we are prepared to handle. */ |
| 62 | |
| 63 | #define T_MAX (T_LNGDBL) |
| 64 | |
| 65 | /* This structure is used to hold slots. */ |
| 66 | |
| 67 | struct coff_slots |
| 68 | { |
| 69 | /* Next set of slots. */ |
| 70 | struct coff_slots *next; |
| 71 | /* Slots. */ |
| 72 | #define COFF_SLOTS (16) |
| 73 | debug_type slots[COFF_SLOTS]; |
| 74 | }; |
| 75 | |
| 76 | /* This structure is used to map symbol indices to types. */ |
| 77 | |
| 78 | struct coff_types |
| 79 | { |
| 80 | /* Slots. */ |
| 81 | struct coff_slots *slots; |
| 82 | /* Basic types. */ |
| 83 | debug_type basic[T_MAX + 1]; |
| 84 | }; |
| 85 | |
| 86 | static debug_type *coff_get_slot (struct coff_types *, long); |
| 87 | static debug_type parse_coff_type |
| 88 | (bfd *, struct coff_symbols *, struct coff_types *, long, int, |
| 89 | union internal_auxent *, bfd_boolean, void *); |
| 90 | static debug_type parse_coff_base_type |
| 91 | (bfd *, struct coff_symbols *, struct coff_types *, long, int, |
| 92 | union internal_auxent *, void *); |
| 93 | static debug_type parse_coff_struct_type |
| 94 | (bfd *, struct coff_symbols *, struct coff_types *, int, |
| 95 | union internal_auxent *, void *); |
| 96 | static debug_type parse_coff_enum_type |
| 97 | (bfd *, struct coff_symbols *, struct coff_types *, |
| 98 | union internal_auxent *, void *); |
| 99 | static bfd_boolean parse_coff_symbol |
| 100 | (bfd *, struct coff_types *, asymbol *, long, struct internal_syment *, |
| 101 | void *, debug_type, bfd_boolean); |
| 102 | static bfd_boolean external_coff_symbol_p (int sym_class); |
| 103 | \f |
| 104 | /* Return the slot for a type. */ |
| 105 | |
| 106 | static debug_type * |
| 107 | coff_get_slot (struct coff_types *types, long indx) |
| 108 | { |
| 109 | struct coff_slots **pps; |
| 110 | |
| 111 | pps = &types->slots; |
| 112 | |
| 113 | /* PR 17512: file: 078-18333-0.001:0.1. |
| 114 | FIXME: The value of 1000 is a guess. Maybe a better heuristic is needed. */ |
| 115 | if (indx / COFF_SLOTS > 1000) |
| 116 | fatal (_("Excessively large slot index: %lx"), indx); |
| 117 | |
| 118 | while (indx >= COFF_SLOTS) |
| 119 | { |
| 120 | if (*pps == NULL) |
| 121 | { |
| 122 | *pps = (struct coff_slots *) xmalloc (sizeof **pps); |
| 123 | memset (*pps, 0, sizeof **pps); |
| 124 | } |
| 125 | pps = &(*pps)->next; |
| 126 | indx -= COFF_SLOTS; |
| 127 | } |
| 128 | |
| 129 | if (*pps == NULL) |
| 130 | { |
| 131 | *pps = (struct coff_slots *) xmalloc (sizeof **pps); |
| 132 | memset (*pps, 0, sizeof **pps); |
| 133 | } |
| 134 | |
| 135 | return (*pps)->slots + indx; |
| 136 | } |
| 137 | |
| 138 | /* Parse a COFF type code in NTYPE. */ |
| 139 | |
| 140 | static debug_type |
| 141 | parse_coff_type (bfd *abfd, struct coff_symbols *symbols, |
| 142 | struct coff_types *types, long coff_symno, int ntype, |
| 143 | union internal_auxent *pauxent, bfd_boolean useaux, |
| 144 | void *dhandle) |
| 145 | { |
| 146 | debug_type type; |
| 147 | |
| 148 | if ((ntype & ~N_BTMASK) != 0) |
| 149 | { |
| 150 | int newtype; |
| 151 | |
| 152 | newtype = DECREF (ntype); |
| 153 | |
| 154 | if (ISPTR (ntype)) |
| 155 | { |
| 156 | type = parse_coff_type (abfd, symbols, types, coff_symno, newtype, |
| 157 | pauxent, useaux, dhandle); |
| 158 | type = debug_make_pointer_type (dhandle, type); |
| 159 | } |
| 160 | else if (ISFCN (ntype)) |
| 161 | { |
| 162 | type = parse_coff_type (abfd, symbols, types, coff_symno, newtype, |
| 163 | pauxent, useaux, dhandle); |
| 164 | type = debug_make_function_type (dhandle, type, (debug_type *) NULL, |
| 165 | FALSE); |
| 166 | } |
| 167 | else if (ISARY (ntype)) |
| 168 | { |
| 169 | int n; |
| 170 | |
| 171 | if (pauxent == NULL) |
| 172 | n = 0; |
| 173 | else |
| 174 | { |
| 175 | unsigned short *dim; |
| 176 | int i; |
| 177 | |
| 178 | /* FIXME: If pauxent->x_sym.x_tagndx.l == 0, gdb sets |
| 179 | the c_naux field of the syment to 0. */ |
| 180 | |
| 181 | /* Move the dimensions down, so that the next array |
| 182 | picks up the next one. */ |
| 183 | dim = pauxent->x_sym.x_fcnary.x_ary.x_dimen; |
| 184 | n = dim[0]; |
| 185 | for (i = 0; *dim != 0 && i < DIMNUM - 1; i++, dim++) |
| 186 | *dim = *(dim + 1); |
| 187 | *dim = 0; |
| 188 | } |
| 189 | |
| 190 | type = parse_coff_type (abfd, symbols, types, coff_symno, newtype, |
| 191 | pauxent, FALSE, dhandle); |
| 192 | type = debug_make_array_type (dhandle, type, |
| 193 | parse_coff_base_type (abfd, symbols, |
| 194 | types, |
| 195 | coff_symno, |
| 196 | T_INT, |
| 197 | NULL, dhandle), |
| 198 | 0, n - 1, FALSE); |
| 199 | } |
| 200 | else |
| 201 | { |
| 202 | non_fatal (_("parse_coff_type: Bad type code 0x%x"), ntype); |
| 203 | return DEBUG_TYPE_NULL; |
| 204 | } |
| 205 | |
| 206 | return type; |
| 207 | } |
| 208 | |
| 209 | if (pauxent != NULL && pauxent->x_sym.x_tagndx.l > 0) |
| 210 | { |
| 211 | debug_type *slot; |
| 212 | |
| 213 | /* This is a reference to an existing type. FIXME: gdb checks |
| 214 | that the class is not C_STRTAG, nor C_UNTAG, nor C_ENTAG. */ |
| 215 | slot = coff_get_slot (types, pauxent->x_sym.x_tagndx.l); |
| 216 | if (*slot != DEBUG_TYPE_NULL) |
| 217 | return *slot; |
| 218 | else |
| 219 | return debug_make_indirect_type (dhandle, slot, (const char *) NULL); |
| 220 | } |
| 221 | |
| 222 | /* If the aux entry has already been used for something, useaux will |
| 223 | have been set to false, indicating that parse_coff_base_type |
| 224 | should not use it. We need to do it this way, rather than simply |
| 225 | passing pauxent as NULL, because we need to be able handle |
| 226 | multiple array dimensions while still discarding pauxent after |
| 227 | having handled all of them. */ |
| 228 | if (! useaux) |
| 229 | pauxent = NULL; |
| 230 | |
| 231 | return parse_coff_base_type (abfd, symbols, types, coff_symno, ntype, |
| 232 | pauxent, dhandle); |
| 233 | } |
| 234 | |
| 235 | /* Parse a basic COFF type in NTYPE. */ |
| 236 | |
| 237 | static debug_type |
| 238 | parse_coff_base_type (bfd *abfd, struct coff_symbols *symbols, |
| 239 | struct coff_types *types, long coff_symno, int ntype, |
| 240 | union internal_auxent *pauxent, void *dhandle) |
| 241 | { |
| 242 | debug_type ret; |
| 243 | bfd_boolean set_basic; |
| 244 | const char *name; |
| 245 | debug_type *slot; |
| 246 | |
| 247 | if (ntype >= 0 |
| 248 | && ntype <= T_MAX |
| 249 | && types->basic[ntype] != DEBUG_TYPE_NULL) |
| 250 | return types->basic[ntype]; |
| 251 | |
| 252 | set_basic = TRUE; |
| 253 | name = NULL; |
| 254 | |
| 255 | switch (ntype) |
| 256 | { |
| 257 | default: |
| 258 | ret = debug_make_void_type (dhandle); |
| 259 | break; |
| 260 | |
| 261 | case T_NULL: |
| 262 | case T_VOID: |
| 263 | ret = debug_make_void_type (dhandle); |
| 264 | name = "void"; |
| 265 | break; |
| 266 | |
| 267 | case T_CHAR: |
| 268 | ret = debug_make_int_type (dhandle, 1, FALSE); |
| 269 | name = "char"; |
| 270 | break; |
| 271 | |
| 272 | case T_SHORT: |
| 273 | ret = debug_make_int_type (dhandle, 2, FALSE); |
| 274 | name = "short"; |
| 275 | break; |
| 276 | |
| 277 | case T_INT: |
| 278 | /* FIXME: Perhaps the size should depend upon the architecture. */ |
| 279 | ret = debug_make_int_type (dhandle, 4, FALSE); |
| 280 | name = "int"; |
| 281 | break; |
| 282 | |
| 283 | case T_LONG: |
| 284 | ret = debug_make_int_type (dhandle, 4, FALSE); |
| 285 | name = "long"; |
| 286 | break; |
| 287 | |
| 288 | case T_FLOAT: |
| 289 | ret = debug_make_float_type (dhandle, 4); |
| 290 | name = "float"; |
| 291 | break; |
| 292 | |
| 293 | case T_DOUBLE: |
| 294 | ret = debug_make_float_type (dhandle, 8); |
| 295 | name = "double"; |
| 296 | break; |
| 297 | |
| 298 | case T_LNGDBL: |
| 299 | ret = debug_make_float_type (dhandle, 12); |
| 300 | name = "long double"; |
| 301 | break; |
| 302 | |
| 303 | case T_UCHAR: |
| 304 | ret = debug_make_int_type (dhandle, 1, TRUE); |
| 305 | name = "unsigned char"; |
| 306 | break; |
| 307 | |
| 308 | case T_USHORT: |
| 309 | ret = debug_make_int_type (dhandle, 2, TRUE); |
| 310 | name = "unsigned short"; |
| 311 | break; |
| 312 | |
| 313 | case T_UINT: |
| 314 | ret = debug_make_int_type (dhandle, 4, TRUE); |
| 315 | name = "unsigned int"; |
| 316 | break; |
| 317 | |
| 318 | case T_ULONG: |
| 319 | ret = debug_make_int_type (dhandle, 4, TRUE); |
| 320 | name = "unsigned long"; |
| 321 | break; |
| 322 | |
| 323 | case T_STRUCT: |
| 324 | if (pauxent == NULL) |
| 325 | ret = debug_make_struct_type (dhandle, TRUE, 0, |
| 326 | (debug_field *) NULL); |
| 327 | else |
| 328 | ret = parse_coff_struct_type (abfd, symbols, types, ntype, pauxent, |
| 329 | dhandle); |
| 330 | |
| 331 | slot = coff_get_slot (types, coff_symno); |
| 332 | *slot = ret; |
| 333 | |
| 334 | set_basic = FALSE; |
| 335 | break; |
| 336 | |
| 337 | case T_UNION: |
| 338 | if (pauxent == NULL) |
| 339 | ret = debug_make_struct_type (dhandle, FALSE, 0, (debug_field *) NULL); |
| 340 | else |
| 341 | ret = parse_coff_struct_type (abfd, symbols, types, ntype, pauxent, |
| 342 | dhandle); |
| 343 | |
| 344 | slot = coff_get_slot (types, coff_symno); |
| 345 | *slot = ret; |
| 346 | |
| 347 | set_basic = FALSE; |
| 348 | break; |
| 349 | |
| 350 | case T_ENUM: |
| 351 | if (pauxent == NULL) |
| 352 | ret = debug_make_enum_type (dhandle, (const char **) NULL, |
| 353 | (bfd_signed_vma *) NULL); |
| 354 | else |
| 355 | ret = parse_coff_enum_type (abfd, symbols, types, pauxent, dhandle); |
| 356 | |
| 357 | slot = coff_get_slot (types, coff_symno); |
| 358 | *slot = ret; |
| 359 | |
| 360 | set_basic = FALSE; |
| 361 | break; |
| 362 | } |
| 363 | |
| 364 | if (name != NULL) |
| 365 | ret = debug_name_type (dhandle, name, ret); |
| 366 | |
| 367 | if (set_basic |
| 368 | && ntype >= 0 |
| 369 | && ntype <= T_MAX) |
| 370 | types->basic[ntype] = ret; |
| 371 | |
| 372 | return ret; |
| 373 | } |
| 374 | |
| 375 | /* Parse a struct type. */ |
| 376 | |
| 377 | static debug_type |
| 378 | parse_coff_struct_type (bfd *abfd, struct coff_symbols *symbols, |
| 379 | struct coff_types *types, int ntype, |
| 380 | union internal_auxent *pauxent, void *dhandle) |
| 381 | { |
| 382 | long symend; |
| 383 | int alloc; |
| 384 | debug_field *fields; |
| 385 | int count; |
| 386 | bfd_boolean done; |
| 387 | |
| 388 | symend = pauxent->x_sym.x_fcnary.x_fcn.x_endndx.l; |
| 389 | |
| 390 | alloc = 10; |
| 391 | fields = (debug_field *) xmalloc (alloc * sizeof *fields); |
| 392 | count = 0; |
| 393 | |
| 394 | done = FALSE; |
| 395 | while (! done |
| 396 | && symbols->coff_symno < symend |
| 397 | && symbols->symno < symbols->symcount) |
| 398 | { |
| 399 | asymbol *sym; |
| 400 | long this_coff_symno; |
| 401 | struct internal_syment syment; |
| 402 | union internal_auxent auxent; |
| 403 | union internal_auxent *psubaux; |
| 404 | bfd_vma bitpos = 0, bitsize = 0; |
| 405 | |
| 406 | sym = symbols->syms[symbols->symno]; |
| 407 | |
| 408 | if (! bfd_coff_get_syment (abfd, sym, &syment)) |
| 409 | { |
| 410 | non_fatal (_("bfd_coff_get_syment failed: %s"), |
| 411 | bfd_errmsg (bfd_get_error ())); |
| 412 | return DEBUG_TYPE_NULL; |
| 413 | } |
| 414 | |
| 415 | this_coff_symno = symbols->coff_symno; |
| 416 | |
| 417 | ++symbols->symno; |
| 418 | symbols->coff_symno += 1 + syment.n_numaux; |
| 419 | |
| 420 | if (syment.n_numaux == 0) |
| 421 | psubaux = NULL; |
| 422 | else |
| 423 | { |
| 424 | if (! bfd_coff_get_auxent (abfd, sym, 0, &auxent)) |
| 425 | { |
| 426 | non_fatal (_("bfd_coff_get_auxent failed: %s"), |
| 427 | bfd_errmsg (bfd_get_error ())); |
| 428 | return DEBUG_TYPE_NULL; |
| 429 | } |
| 430 | psubaux = &auxent; |
| 431 | } |
| 432 | |
| 433 | switch (syment.n_sclass) |
| 434 | { |
| 435 | case C_MOS: |
| 436 | case C_MOU: |
| 437 | bitpos = 8 * bfd_asymbol_value (sym); |
| 438 | bitsize = 0; |
| 439 | break; |
| 440 | |
| 441 | case C_FIELD: |
| 442 | bitpos = bfd_asymbol_value (sym); |
| 443 | bitsize = auxent.x_sym.x_misc.x_lnsz.x_size; |
| 444 | break; |
| 445 | |
| 446 | case C_EOS: |
| 447 | done = TRUE; |
| 448 | break; |
| 449 | } |
| 450 | |
| 451 | if (! done) |
| 452 | { |
| 453 | debug_type ftype; |
| 454 | debug_field f; |
| 455 | |
| 456 | ftype = parse_coff_type (abfd, symbols, types, this_coff_symno, |
| 457 | syment.n_type, psubaux, TRUE, dhandle); |
| 458 | f = debug_make_field (dhandle, bfd_asymbol_name (sym), ftype, |
| 459 | bitpos, bitsize, DEBUG_VISIBILITY_PUBLIC); |
| 460 | if (f == DEBUG_FIELD_NULL) |
| 461 | return DEBUG_TYPE_NULL; |
| 462 | |
| 463 | if (count + 1 >= alloc) |
| 464 | { |
| 465 | alloc += 10; |
| 466 | fields = ((debug_field *) |
| 467 | xrealloc (fields, alloc * sizeof *fields)); |
| 468 | } |
| 469 | |
| 470 | fields[count] = f; |
| 471 | ++count; |
| 472 | } |
| 473 | } |
| 474 | |
| 475 | fields[count] = DEBUG_FIELD_NULL; |
| 476 | |
| 477 | return debug_make_struct_type (dhandle, ntype == T_STRUCT, |
| 478 | pauxent->x_sym.x_misc.x_lnsz.x_size, |
| 479 | fields); |
| 480 | } |
| 481 | |
| 482 | /* Parse an enum type. */ |
| 483 | |
| 484 | static debug_type |
| 485 | parse_coff_enum_type (bfd *abfd, struct coff_symbols *symbols, |
| 486 | struct coff_types *types ATTRIBUTE_UNUSED, |
| 487 | union internal_auxent *pauxent, void *dhandle) |
| 488 | { |
| 489 | long symend; |
| 490 | int alloc; |
| 491 | const char **names; |
| 492 | bfd_signed_vma *vals; |
| 493 | int count; |
| 494 | bfd_boolean done; |
| 495 | |
| 496 | symend = pauxent->x_sym.x_fcnary.x_fcn.x_endndx.l; |
| 497 | |
| 498 | alloc = 10; |
| 499 | names = (const char **) xmalloc (alloc * sizeof *names); |
| 500 | vals = (bfd_signed_vma *) xmalloc (alloc * sizeof *vals); |
| 501 | count = 0; |
| 502 | |
| 503 | done = FALSE; |
| 504 | while (! done |
| 505 | && symbols->coff_symno < symend |
| 506 | && symbols->symno < symbols->symcount) |
| 507 | { |
| 508 | asymbol *sym; |
| 509 | struct internal_syment syment; |
| 510 | |
| 511 | sym = symbols->syms[symbols->symno]; |
| 512 | |
| 513 | if (! bfd_coff_get_syment (abfd, sym, &syment)) |
| 514 | { |
| 515 | non_fatal (_("bfd_coff_get_syment failed: %s"), |
| 516 | bfd_errmsg (bfd_get_error ())); |
| 517 | return DEBUG_TYPE_NULL; |
| 518 | } |
| 519 | |
| 520 | ++symbols->symno; |
| 521 | symbols->coff_symno += 1 + syment.n_numaux; |
| 522 | |
| 523 | switch (syment.n_sclass) |
| 524 | { |
| 525 | case C_MOE: |
| 526 | if (count + 1 >= alloc) |
| 527 | { |
| 528 | alloc += 10; |
| 529 | names = ((const char **) |
| 530 | xrealloc (names, alloc * sizeof *names)); |
| 531 | vals = ((bfd_signed_vma *) |
| 532 | xrealloc (vals, alloc * sizeof *vals)); |
| 533 | } |
| 534 | |
| 535 | names[count] = bfd_asymbol_name (sym); |
| 536 | vals[count] = bfd_asymbol_value (sym); |
| 537 | ++count; |
| 538 | break; |
| 539 | |
| 540 | case C_EOS: |
| 541 | done = TRUE; |
| 542 | break; |
| 543 | } |
| 544 | } |
| 545 | |
| 546 | names[count] = NULL; |
| 547 | |
| 548 | return debug_make_enum_type (dhandle, names, vals); |
| 549 | } |
| 550 | |
| 551 | /* Handle a single COFF symbol. */ |
| 552 | |
| 553 | static bfd_boolean |
| 554 | parse_coff_symbol (bfd *abfd ATTRIBUTE_UNUSED, struct coff_types *types, |
| 555 | asymbol *sym, long coff_symno, |
| 556 | struct internal_syment *psyment, void *dhandle, |
| 557 | debug_type type, bfd_boolean within_function) |
| 558 | { |
| 559 | switch (psyment->n_sclass) |
| 560 | { |
| 561 | case C_NULL: |
| 562 | break; |
| 563 | |
| 564 | case C_AUTO: |
| 565 | if (! debug_record_variable (dhandle, bfd_asymbol_name (sym), type, |
| 566 | DEBUG_LOCAL, bfd_asymbol_value (sym))) |
| 567 | return FALSE; |
| 568 | break; |
| 569 | |
| 570 | case C_WEAKEXT: |
| 571 | case C_EXT: |
| 572 | if (! debug_record_variable (dhandle, bfd_asymbol_name (sym), type, |
| 573 | DEBUG_GLOBAL, bfd_asymbol_value (sym))) |
| 574 | return FALSE; |
| 575 | break; |
| 576 | |
| 577 | case C_STAT: |
| 578 | if (! debug_record_variable (dhandle, bfd_asymbol_name (sym), type, |
| 579 | (within_function |
| 580 | ? DEBUG_LOCAL_STATIC |
| 581 | : DEBUG_STATIC), |
| 582 | bfd_asymbol_value (sym))) |
| 583 | return FALSE; |
| 584 | break; |
| 585 | |
| 586 | case C_REG: |
| 587 | /* FIXME: We may need to convert the register number. */ |
| 588 | if (! debug_record_variable (dhandle, bfd_asymbol_name (sym), type, |
| 589 | DEBUG_REGISTER, bfd_asymbol_value (sym))) |
| 590 | return FALSE; |
| 591 | break; |
| 592 | |
| 593 | case C_LABEL: |
| 594 | break; |
| 595 | |
| 596 | case C_ARG: |
| 597 | if (! debug_record_parameter (dhandle, bfd_asymbol_name (sym), type, |
| 598 | DEBUG_PARM_STACK, bfd_asymbol_value (sym))) |
| 599 | return FALSE; |
| 600 | break; |
| 601 | |
| 602 | case C_REGPARM: |
| 603 | /* FIXME: We may need to convert the register number. */ |
| 604 | if (! debug_record_parameter (dhandle, bfd_asymbol_name (sym), type, |
| 605 | DEBUG_PARM_REG, bfd_asymbol_value (sym))) |
| 606 | return FALSE; |
| 607 | break; |
| 608 | |
| 609 | case C_TPDEF: |
| 610 | type = debug_name_type (dhandle, bfd_asymbol_name (sym), type); |
| 611 | if (type == DEBUG_TYPE_NULL) |
| 612 | return FALSE; |
| 613 | break; |
| 614 | |
| 615 | case C_STRTAG: |
| 616 | case C_UNTAG: |
| 617 | case C_ENTAG: |
| 618 | { |
| 619 | debug_type *slot; |
| 620 | |
| 621 | type = debug_tag_type (dhandle, bfd_asymbol_name (sym), type); |
| 622 | if (type == DEBUG_TYPE_NULL) |
| 623 | return FALSE; |
| 624 | |
| 625 | /* Store the named type into the slot, so that references get |
| 626 | the name. */ |
| 627 | slot = coff_get_slot (types, coff_symno); |
| 628 | *slot = type; |
| 629 | } |
| 630 | break; |
| 631 | |
| 632 | default: |
| 633 | break; |
| 634 | } |
| 635 | |
| 636 | return TRUE; |
| 637 | } |
| 638 | |
| 639 | /* Determine if a symbol has external visibility. */ |
| 640 | |
| 641 | static bfd_boolean |
| 642 | external_coff_symbol_p (int sym_class) |
| 643 | { |
| 644 | switch (sym_class) |
| 645 | { |
| 646 | case C_EXT: |
| 647 | case C_WEAKEXT: |
| 648 | return TRUE; |
| 649 | default: |
| 650 | break; |
| 651 | } |
| 652 | return FALSE; |
| 653 | } |
| 654 | |
| 655 | /* This is the main routine. It looks through all the symbols and |
| 656 | handles them. */ |
| 657 | |
| 658 | bfd_boolean |
| 659 | parse_coff (bfd *abfd, asymbol **syms, long symcount, void *dhandle) |
| 660 | { |
| 661 | struct coff_symbols symbols; |
| 662 | struct coff_types types; |
| 663 | int i; |
| 664 | long next_c_file; |
| 665 | const char *fnname; |
| 666 | int fnclass; |
| 667 | int fntype; |
| 668 | bfd_vma fnend; |
| 669 | alent *linenos; |
| 670 | bfd_boolean within_function; |
| 671 | long this_coff_symno; |
| 672 | |
| 673 | symbols.syms = syms; |
| 674 | symbols.symcount = symcount; |
| 675 | symbols.symno = 0; |
| 676 | symbols.coff_symno = 0; |
| 677 | |
| 678 | types.slots = NULL; |
| 679 | for (i = 0; i <= T_MAX; i++) |
| 680 | types.basic[i] = DEBUG_TYPE_NULL; |
| 681 | |
| 682 | next_c_file = -1; |
| 683 | fnname = NULL; |
| 684 | fnclass = 0; |
| 685 | fntype = 0; |
| 686 | fnend = 0; |
| 687 | linenos = NULL; |
| 688 | within_function = FALSE; |
| 689 | |
| 690 | while (symbols.symno < symcount) |
| 691 | { |
| 692 | asymbol *sym; |
| 693 | const char *name; |
| 694 | struct internal_syment syment; |
| 695 | union internal_auxent auxent; |
| 696 | union internal_auxent *paux; |
| 697 | debug_type type; |
| 698 | |
| 699 | sym = syms[symbols.symno]; |
| 700 | |
| 701 | if (! bfd_coff_get_syment (abfd, sym, &syment)) |
| 702 | { |
| 703 | non_fatal (_("bfd_coff_get_syment failed: %s"), |
| 704 | bfd_errmsg (bfd_get_error ())); |
| 705 | return FALSE; |
| 706 | } |
| 707 | |
| 708 | name = bfd_asymbol_name (sym); |
| 709 | |
| 710 | this_coff_symno = symbols.coff_symno; |
| 711 | |
| 712 | ++symbols.symno; |
| 713 | symbols.coff_symno += 1 + syment.n_numaux; |
| 714 | |
| 715 | /* We only worry about the first auxent, because that is the |
| 716 | only one which is relevant for debugging information. */ |
| 717 | if (syment.n_numaux == 0) |
| 718 | paux = NULL; |
| 719 | else |
| 720 | { |
| 721 | if (! bfd_coff_get_auxent (abfd, sym, 0, &auxent)) |
| 722 | { |
| 723 | non_fatal (_("bfd_coff_get_auxent failed: %s"), |
| 724 | bfd_errmsg (bfd_get_error ())); |
| 725 | return FALSE; |
| 726 | } |
| 727 | paux = &auxent; |
| 728 | } |
| 729 | |
| 730 | if (this_coff_symno == next_c_file && syment.n_sclass != C_FILE) |
| 731 | { |
| 732 | /* The last C_FILE symbol points to the first external |
| 733 | symbol. */ |
| 734 | if (! debug_set_filename (dhandle, "*globals*")) |
| 735 | return FALSE; |
| 736 | } |
| 737 | |
| 738 | switch (syment.n_sclass) |
| 739 | { |
| 740 | case C_EFCN: |
| 741 | case C_EXTDEF: |
| 742 | case C_ULABEL: |
| 743 | case C_USTATIC: |
| 744 | case C_LINE: |
| 745 | case C_ALIAS: |
| 746 | case C_HIDDEN: |
| 747 | /* Just ignore these classes. */ |
| 748 | break; |
| 749 | |
| 750 | case C_FILE: |
| 751 | next_c_file = syment.n_value; |
| 752 | if (! debug_set_filename (dhandle, name)) |
| 753 | return FALSE; |
| 754 | break; |
| 755 | |
| 756 | case C_STAT: |
| 757 | /* Ignore static symbols with a type of T_NULL. These |
| 758 | represent section entries. */ |
| 759 | if (syment.n_type == T_NULL) |
| 760 | break; |
| 761 | /* Fall through. */ |
| 762 | case C_WEAKEXT: |
| 763 | case C_EXT: |
| 764 | if (ISFCN (syment.n_type)) |
| 765 | { |
| 766 | fnname = name; |
| 767 | fnclass = syment.n_sclass; |
| 768 | fntype = syment.n_type; |
| 769 | if (syment.n_numaux > 0) |
| 770 | fnend = bfd_asymbol_value (sym) + auxent.x_sym.x_misc.x_fsize; |
| 771 | else |
| 772 | fnend = 0; |
| 773 | linenos = BFD_SEND (abfd, _get_lineno, (abfd, sym)); |
| 774 | break; |
| 775 | } |
| 776 | type = parse_coff_type (abfd, &symbols, &types, this_coff_symno, |
| 777 | syment.n_type, paux, TRUE, dhandle); |
| 778 | if (type == DEBUG_TYPE_NULL) |
| 779 | return FALSE; |
| 780 | if (! parse_coff_symbol (abfd, &types, sym, this_coff_symno, &syment, |
| 781 | dhandle, type, within_function)) |
| 782 | return FALSE; |
| 783 | break; |
| 784 | |
| 785 | case C_FCN: |
| 786 | if (strcmp (name, ".bf") == 0) |
| 787 | { |
| 788 | if (fnname == NULL) |
| 789 | { |
| 790 | non_fatal (_("%ld: .bf without preceding function"), |
| 791 | this_coff_symno); |
| 792 | return FALSE; |
| 793 | } |
| 794 | |
| 795 | type = parse_coff_type (abfd, &symbols, &types, this_coff_symno, |
| 796 | DECREF (fntype), paux, FALSE, dhandle); |
| 797 | if (type == DEBUG_TYPE_NULL) |
| 798 | return FALSE; |
| 799 | |
| 800 | if (! debug_record_function (dhandle, fnname, type, |
| 801 | external_coff_symbol_p (fnclass), |
| 802 | bfd_asymbol_value (sym))) |
| 803 | return FALSE; |
| 804 | |
| 805 | if (linenos != NULL) |
| 806 | { |
| 807 | int base; |
| 808 | bfd_vma addr; |
| 809 | |
| 810 | if (syment.n_numaux == 0) |
| 811 | base = 0; |
| 812 | else |
| 813 | base = auxent.x_sym.x_misc.x_lnsz.x_lnno - 1; |
| 814 | |
| 815 | addr = bfd_get_section_vma (abfd, bfd_get_section (sym)); |
| 816 | |
| 817 | ++linenos; |
| 818 | |
| 819 | while (linenos->line_number != 0) |
| 820 | { |
| 821 | if (! debug_record_line (dhandle, |
| 822 | linenos->line_number + base, |
| 823 | linenos->u.offset + addr)) |
| 824 | return FALSE; |
| 825 | ++linenos; |
| 826 | } |
| 827 | } |
| 828 | |
| 829 | fnname = NULL; |
| 830 | linenos = NULL; |
| 831 | fnclass = 0; |
| 832 | fntype = 0; |
| 833 | |
| 834 | within_function = TRUE; |
| 835 | } |
| 836 | else if (strcmp (name, ".ef") == 0) |
| 837 | { |
| 838 | if (! within_function) |
| 839 | { |
| 840 | non_fatal (_("%ld: unexpected .ef\n"), this_coff_symno); |
| 841 | return FALSE; |
| 842 | } |
| 843 | |
| 844 | if (bfd_asymbol_value (sym) > fnend) |
| 845 | fnend = bfd_asymbol_value (sym); |
| 846 | if (! debug_end_function (dhandle, fnend)) |
| 847 | return FALSE; |
| 848 | |
| 849 | fnend = 0; |
| 850 | within_function = FALSE; |
| 851 | } |
| 852 | break; |
| 853 | |
| 854 | case C_BLOCK: |
| 855 | if (strcmp (name, ".bb") == 0) |
| 856 | { |
| 857 | if (! debug_start_block (dhandle, bfd_asymbol_value (sym))) |
| 858 | return FALSE; |
| 859 | } |
| 860 | else if (strcmp (name, ".eb") == 0) |
| 861 | { |
| 862 | if (! debug_end_block (dhandle, bfd_asymbol_value (sym))) |
| 863 | return FALSE; |
| 864 | } |
| 865 | break; |
| 866 | |
| 867 | default: |
| 868 | type = parse_coff_type (abfd, &symbols, &types, this_coff_symno, |
| 869 | syment.n_type, paux, TRUE, dhandle); |
| 870 | if (type == DEBUG_TYPE_NULL) |
| 871 | return FALSE; |
| 872 | if (! parse_coff_symbol (abfd, &types, sym, this_coff_symno, &syment, |
| 873 | dhandle, type, within_function)) |
| 874 | return FALSE; |
| 875 | break; |
| 876 | } |
| 877 | } |
| 878 | |
| 879 | return TRUE; |
| 880 | } |