1 /* Read a symbol table in ECOFF format (Third-Eye). 2 3 Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software 5 Foundation, Inc. 6 7 Original version contributed by Alessandro Forin (af@cs.cmu.edu) at 8 CMU. Major work by Per Bothner, John Gilmore and Ian Lance Taylor 9 at Cygnus Support. 10 11 This file is part of GDB. 12 13 This program is free software; you can redistribute it and/or modify 14 it under the terms of the GNU General Public License as published by 15 the Free Software Foundation; either version 2 of the License, or 16 (at your option) any later version. 17 18 This program is distributed in the hope that it will be useful, 19 but WITHOUT ANY WARRANTY; without even the implied warranty of 20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 GNU General Public License for more details. 22 23 You should have received a copy of the GNU General Public License 24 along with this program; if not, write to the Free Software 25 Foundation, Inc., 59 Temple Place - Suite 330, 26 Boston, MA 02111-1307, USA. */ 27 28 /* This module provides the function mdebug_build_psymtabs. It reads 29 ECOFF debugging information into partial symbol tables. The 30 debugging information is read from two structures. A struct 31 ecoff_debug_swap includes the sizes of each ECOFF structure and 32 swapping routines; these are fixed for a particular target. A 33 struct ecoff_debug_info points to the debugging information for a 34 particular object file. 35 36 ECOFF symbol tables are mostly written in the byte order of the 37 target machine. However, one section of the table (the auxiliary 38 symbol information) is written in the host byte order. There is a 39 bit in the other symbol info which describes which host byte order 40 was used. ECOFF thereby takes the trophy from Intel `b.out' for 41 the most brain-dead adaptation of a file format to byte order. 42 43 This module can read all four of the known byte-order combinations, 44 on any type of host. */ 45 46 #include "defs.h" 47 #include "symtab.h" 48 #include "gdbtypes.h" 49 #include "gdbcore.h" 50 #include "objfiles.h" 51 #include "gdb_obstack.h" 52 #include "buildsym.h" 53 #include "stabsread.h" 54 #include "complaints.h" 55 #include "demangle.h" 56 #include "gdb_assert.h" 57 #include "block.h" 58 #include "dictionary.h" 59 60 /* These are needed if the tm.h file does not contain the necessary 61 mips specific definitions. */ 62 63 #ifndef MIPS_EFI_SYMBOL_NAME 64 #define MIPS_EFI_SYMBOL_NAME "__GDB_EFI_INFO__" 65 extern void ecoff_relocate_efi (struct symbol *, CORE_ADDR); 66 #include "coff/sym.h" 67 #include "coff/symconst.h" 68 typedef struct mips_extra_func_info 69 { 70 long numargs; 71 PDR pdr; 72 } 73 *mips_extra_func_info_t; 74 #ifndef RA_REGNUM 75 #define RA_REGNUM 0 76 #endif 77 #endif 78 79 #include "gdb_stat.h" 80 #include "gdb_string.h" 81 82 #include "bfd.h" 83 84 #include "coff/ecoff.h" /* COFF-like aspects of ecoff files */ 85 86 #include "libaout.h" /* Private BFD a.out information. */ 87 #include "aout/aout64.h" 88 #include "aout/stab_gnu.h" /* STABS information */ 89 90 #include "expression.h" 91 92 extern void _initialize_mdebugread (void); 93 94 /* Provide a way to test if we have both ECOFF and ELF symbol tables. 95 We use this define in order to know whether we should override a 96 symbol's ECOFF section with its ELF section. This is necessary in 97 case the symbol's ELF section could not be represented in ECOFF. */ 98 #define ECOFF_IN_ELF(bfd) (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ 99 && bfd_get_section_by_name (bfd, ".mdebug") != NULL) 100 101 102 /* We put a pointer to this structure in the read_symtab_private field 103 of the psymtab. */ 104 105 struct symloc 106 { 107 /* Index of the FDR that this psymtab represents. */ 108 int fdr_idx; 109 /* The BFD that the psymtab was created from. */ 110 bfd *cur_bfd; 111 const struct ecoff_debug_swap *debug_swap; 112 struct ecoff_debug_info *debug_info; 113 struct mdebug_pending **pending_list; 114 /* Pointer to external symbols for this file. */ 115 EXTR *extern_tab; 116 /* Size of extern_tab. */ 117 int extern_count; 118 enum language pst_language; 119 }; 120 121 #define PST_PRIVATE(p) ((struct symloc *)(p)->read_symtab_private) 122 #define FDR_IDX(p) (PST_PRIVATE(p)->fdr_idx) 123 #define CUR_BFD(p) (PST_PRIVATE(p)->cur_bfd) 124 #define DEBUG_SWAP(p) (PST_PRIVATE(p)->debug_swap) 125 #define DEBUG_INFO(p) (PST_PRIVATE(p)->debug_info) 126 #define PENDING_LIST(p) (PST_PRIVATE(p)->pending_list) 127 128 #define SC_IS_TEXT(sc) ((sc) == scText \ 129 || (sc) == scRConst \ 130 || (sc) == scInit \ 131 || (sc) == scFini) 132 #define SC_IS_DATA(sc) ((sc) == scData \ 133 || (sc) == scSData \ 134 || (sc) == scRData \ 135 || (sc) == scPData \ 136 || (sc) == scXData) 137 #define SC_IS_COMMON(sc) ((sc) == scCommon || (sc) == scSCommon) 138 #define SC_IS_BSS(sc) ((sc) == scBss) 139 #define SC_IS_SBSS(sc) ((sc) == scSBss) 140 #define SC_IS_UNDEF(sc) ((sc) == scUndefined || (sc) == scSUndefined) 141 142 /* Various complaints about symbol reading that don't abort the process */ 143 static void 144 index_complaint (const char *arg1) 145 { 146 complaint (&symfile_complaints, "bad aux index at symbol %s", arg1); 147 } 148 149 static void 150 unknown_ext_complaint (const char *arg1) 151 { 152 complaint (&symfile_complaints, "unknown external symbol %s", arg1); 153 } 154 155 static void 156 basic_type_complaint (int arg1, const char *arg2) 157 { 158 complaint (&symfile_complaints, "cannot map ECOFF basic type 0x%x for %s", 159 arg1, arg2); 160 } 161 162 static void 163 bad_tag_guess_complaint (const char *arg1) 164 { 165 complaint (&symfile_complaints, "guessed tag type of %s incorrectly", arg1); 166 } 167 168 static void 169 bad_rfd_entry_complaint (const char *arg1, int arg2, int arg3) 170 { 171 complaint (&symfile_complaints, "bad rfd entry for %s: file %d, index %d", 172 arg1, arg2, arg3); 173 } 174 175 static void 176 unexpected_type_code_complaint (const char *arg1) 177 { 178 complaint (&symfile_complaints, "unexpected type code for %s", arg1); 179 } 180 181 /* Macros and extra defs */ 182 183 /* Puns: hard to find whether -g was used and how */ 184 185 #define MIN_GLEVEL GLEVEL_0 186 #define compare_glevel(a,b) \ 187 (((a) == GLEVEL_3) ? ((b) < GLEVEL_3) : \ 188 ((b) == GLEVEL_3) ? -1 : (int)((b) - (a))) 189 190 /* Things that really are local to this module */ 191 192 /* Remember what we deduced to be the source language of this psymtab. */ 193 194 static enum language psymtab_language = language_unknown; 195 196 /* Current BFD. */ 197 198 static bfd *cur_bfd; 199 200 /* How to parse debugging information for CUR_BFD. */ 201 202 static const struct ecoff_debug_swap *debug_swap; 203 204 /* Pointers to debugging information for CUR_BFD. */ 205 206 static struct ecoff_debug_info *debug_info; 207 208 /* Pointer to current file decriptor record, and its index */ 209 210 static FDR *cur_fdr; 211 static int cur_fd; 212 213 /* Index of current symbol */ 214 215 static int cur_sdx; 216 217 /* Note how much "debuggable" this image is. We would like 218 to see at least one FDR with full symbols */ 219 220 static int max_gdbinfo; 221 static int max_glevel; 222 223 /* When examining .o files, report on undefined symbols */ 224 225 static int n_undef_symbols, n_undef_labels, n_undef_vars, n_undef_procs; 226 227 /* Pseudo symbol to use when putting stabs into the symbol table. */ 228 229 static char stabs_symbol[] = STABS_SYMBOL; 230 231 /* Types corresponding to mdebug format bt* basic types. */ 232 233 static struct type *mdebug_type_void; 234 static struct type *mdebug_type_char; 235 static struct type *mdebug_type_short; 236 static struct type *mdebug_type_int_32; 237 #define mdebug_type_int mdebug_type_int_32 238 static struct type *mdebug_type_int_64; 239 static struct type *mdebug_type_long_32; 240 static struct type *mdebug_type_long_64; 241 static struct type *mdebug_type_long_long_64; 242 static struct type *mdebug_type_unsigned_char; 243 static struct type *mdebug_type_unsigned_short; 244 static struct type *mdebug_type_unsigned_int_32; 245 static struct type *mdebug_type_unsigned_int_64; 246 static struct type *mdebug_type_unsigned_long_32; 247 static struct type *mdebug_type_unsigned_long_64; 248 static struct type *mdebug_type_unsigned_long_long_64; 249 static struct type *mdebug_type_adr_32; 250 static struct type *mdebug_type_adr_64; 251 static struct type *mdebug_type_float; 252 static struct type *mdebug_type_double; 253 static struct type *mdebug_type_complex; 254 static struct type *mdebug_type_double_complex; 255 static struct type *mdebug_type_fixed_dec; 256 static struct type *mdebug_type_float_dec; 257 static struct type *mdebug_type_string; 258 259 /* Types for symbols from files compiled without debugging info. */ 260 261 static struct type *nodebug_func_symbol_type; 262 static struct type *nodebug_var_symbol_type; 263 264 /* Nonzero if we have seen ecoff debugging info for a file. */ 265 266 static int found_ecoff_debugging_info; 267 268 /* Forward declarations */ 269 270 static int upgrade_type (int, struct type **, int, union aux_ext *, 271 int, char *); 272 273 static void parse_partial_symbols (struct objfile *); 274 275 static int has_opaque_xref (FDR *, SYMR *); 276 277 static int cross_ref (int, union aux_ext *, struct type **, enum type_code, 278 char **, int, char *); 279 280 static struct symbol *new_symbol (char *); 281 282 static struct type *new_type (char *); 283 284 enum block_type { FUNCTION_BLOCK, NON_FUNCTION_BLOCK }; 285 286 static struct block *new_block (enum block_type); 287 288 static struct symtab *new_symtab (char *, int, struct objfile *); 289 290 static struct linetable *new_linetable (int); 291 292 static struct blockvector *new_bvect (int); 293 294 static struct type *parse_type (int, union aux_ext *, unsigned int, int *, 295 int, char *); 296 297 static struct symbol *mylookup_symbol (char *, struct block *, domain_enum, 298 enum address_class); 299 300 static void sort_blocks (struct symtab *); 301 302 static struct partial_symtab *new_psymtab (char *, struct objfile *); 303 304 static void psymtab_to_symtab_1 (struct partial_symtab *, char *); 305 306 static void add_block (struct block *, struct symtab *); 307 308 static void add_symbol (struct symbol *, struct block *); 309 310 static int add_line (struct linetable *, int, CORE_ADDR, int); 311 312 static struct linetable *shrink_linetable (struct linetable *); 313 314 static void handle_psymbol_enumerators (struct objfile *, FDR *, int, 315 CORE_ADDR); 316 317 static char *mdebug_next_symbol_text (struct objfile *); 318 319 /* Allocate zeroed memory */ 320 321 static void * 322 xzalloc (unsigned int size) 323 { 324 void *p = xmalloc (size); 325 326 memset (p, 0, size); 327 return p; 328 } 329 330 /* Exported procedure: Builds a symtab from the PST partial one. 331 Restores the environment in effect when PST was created, delegates 332 most of the work to an ancillary procedure, and sorts 333 and reorders the symtab list at the end */ 334 335 static void 336 mdebug_psymtab_to_symtab (struct partial_symtab *pst) 337 { 338 339 if (!pst) 340 return; 341 342 if (info_verbose) 343 { 344 printf_filtered ("Reading in symbols for %s...", pst->filename); 345 gdb_flush (gdb_stdout); 346 } 347 348 next_symbol_text_func = mdebug_next_symbol_text; 349 350 psymtab_to_symtab_1 (pst, pst->filename); 351 352 /* Match with global symbols. This only needs to be done once, 353 after all of the symtabs and dependencies have been read in. */ 354 scan_file_globals (pst->objfile); 355 356 if (info_verbose) 357 printf_filtered ("done.\n"); 358 } 359 360 /* File-level interface functions */ 361 362 /* Find a file descriptor given its index RF relative to a file CF */ 363 364 static FDR * 365 get_rfd (int cf, int rf) 366 { 367 FDR *fdrs; 368 FDR *f; 369 RFDT rfd; 370 371 fdrs = debug_info->fdr; 372 f = fdrs + cf; 373 /* Object files do not have the RFD table, all refs are absolute */ 374 if (f->rfdBase == 0) 375 return fdrs + rf; 376 (*debug_swap->swap_rfd_in) (cur_bfd, 377 ((char *) debug_info->external_rfd 378 + ((f->rfdBase + rf) 379 * debug_swap->external_rfd_size)), 380 &rfd); 381 return fdrs + rfd; 382 } 383 384 /* Return a safer print NAME for a file descriptor */ 385 386 static char * 387 fdr_name (FDR *f) 388 { 389 if (f->rss == -1) 390 return "<stripped file>"; 391 if (f->rss == 0) 392 return "<NFY>"; 393 return debug_info->ss + f->issBase + f->rss; 394 } 395 396 397 /* Read in and parse the symtab of the file OBJFILE. Symbols from 398 different sections are relocated via the SECTION_OFFSETS. */ 399 400 void 401 mdebug_build_psymtabs (struct objfile *objfile, 402 const struct ecoff_debug_swap *swap, 403 struct ecoff_debug_info *info) 404 { 405 cur_bfd = objfile->obfd; 406 debug_swap = swap; 407 debug_info = info; 408 409 stabsread_new_init (); 410 buildsym_new_init (); 411 free_header_files (); 412 init_header_files (); 413 414 /* Make sure all the FDR information is swapped in. */ 415 if (info->fdr == (FDR *) NULL) 416 { 417 char *fdr_src; 418 char *fdr_end; 419 FDR *fdr_ptr; 420 421 info->fdr = (FDR *) obstack_alloc (&objfile->objfile_obstack, 422 (info->symbolic_header.ifdMax 423 * sizeof (FDR))); 424 fdr_src = info->external_fdr; 425 fdr_end = (fdr_src 426 + info->symbolic_header.ifdMax * swap->external_fdr_size); 427 fdr_ptr = info->fdr; 428 for (; fdr_src < fdr_end; fdr_src += swap->external_fdr_size, fdr_ptr++) 429 (*swap->swap_fdr_in) (objfile->obfd, fdr_src, fdr_ptr); 430 } 431 432 parse_partial_symbols (objfile); 433 434 #if 0 435 /* Check to make sure file was compiled with -g. If not, warn the 436 user of this limitation. */ 437 if (compare_glevel (max_glevel, GLEVEL_2) < 0) 438 { 439 if (max_gdbinfo == 0) 440 printf_unfiltered ("\n%s not compiled with -g, debugging support is limited.\n", 441 objfile->name); 442 printf_unfiltered ("You should compile with -g2 or -g3 for best debugging support.\n"); 443 gdb_flush (gdb_stdout); 444 } 445 #endif 446 } 447 448 /* Local utilities */ 449 450 /* Map of FDR indexes to partial symtabs */ 451 452 struct pst_map 453 { 454 struct partial_symtab *pst; /* the psymtab proper */ 455 long n_globals; /* exported globals (external symbols) */ 456 long globals_offset; /* cumulative */ 457 }; 458 459 460 /* Utility stack, used to nest procedures and blocks properly. 461 It is a doubly linked list, to avoid too many alloc/free. 462 Since we might need it quite a few times it is NOT deallocated 463 after use. */ 464 465 static struct parse_stack 466 { 467 struct parse_stack *next, *prev; 468 struct symtab *cur_st; /* Current symtab. */ 469 struct block *cur_block; /* Block in it. */ 470 471 /* What are we parsing. stFile, or stBlock are for files and 472 blocks. stProc or stStaticProc means we have seen the start of a 473 procedure, but not the start of the block within in. When we see 474 the start of that block, we change it to stNil, without pushing a 475 new block, i.e. stNil means both a procedure and a block. */ 476 477 int blocktype; 478 479 struct type *cur_type; /* Type we parse fields for. */ 480 int cur_field; /* Field number in cur_type. */ 481 CORE_ADDR procadr; /* Start addres of this procedure */ 482 int numargs; /* Its argument count */ 483 } 484 485 *top_stack; /* Top stack ptr */ 486 487 488 /* Enter a new lexical context */ 489 490 static void 491 push_parse_stack (void) 492 { 493 struct parse_stack *new; 494 495 /* Reuse frames if possible */ 496 if (top_stack && top_stack->prev) 497 new = top_stack->prev; 498 else 499 new = (struct parse_stack *) xzalloc (sizeof (struct parse_stack)); 500 /* Initialize new frame with previous content */ 501 if (top_stack) 502 { 503 struct parse_stack *prev = new->prev; 504 505 *new = *top_stack; 506 top_stack->prev = new; 507 new->prev = prev; 508 new->next = top_stack; 509 } 510 top_stack = new; 511 } 512 513 /* Exit a lexical context */ 514 515 static void 516 pop_parse_stack (void) 517 { 518 if (!top_stack) 519 return; 520 if (top_stack->next) 521 top_stack = top_stack->next; 522 } 523 524 525 /* Cross-references might be to things we haven't looked at 526 yet, e.g. type references. To avoid too many type 527 duplications we keep a quick fixup table, an array 528 of lists of references indexed by file descriptor */ 529 530 struct mdebug_pending 531 { 532 struct mdebug_pending *next; /* link */ 533 char *s; /* the unswapped symbol */ 534 struct type *t; /* its partial type descriptor */ 535 }; 536 537 538 /* The pending information is kept for an entire object file, and used 539 to be in the sym_private field. I took it out when I split 540 mdebugread from mipsread, because this might not be the only type 541 of symbols read from an object file. Instead, we allocate the 542 pending information table when we create the partial symbols, and 543 we store a pointer to the single table in each psymtab. */ 544 545 static struct mdebug_pending **pending_list; 546 547 /* Check whether we already saw symbol SH in file FH */ 548 549 static struct mdebug_pending * 550 is_pending_symbol (FDR *fh, char *sh) 551 { 552 int f_idx = fh - debug_info->fdr; 553 struct mdebug_pending *p; 554 555 /* Linear search is ok, list is typically no more than 10 deep */ 556 for (p = pending_list[f_idx]; p; p = p->next) 557 if (p->s == sh) 558 break; 559 return p; 560 } 561 562 /* Add a new symbol SH of type T */ 563 564 static void 565 add_pending (FDR *fh, char *sh, struct type *t) 566 { 567 int f_idx = fh - debug_info->fdr; 568 struct mdebug_pending *p = is_pending_symbol (fh, sh); 569 570 /* Make sure we do not make duplicates */ 571 if (!p) 572 { 573 p = ((struct mdebug_pending *) 574 obstack_alloc (¤t_objfile->objfile_obstack, 575 sizeof (struct mdebug_pending))); 576 p->s = sh; 577 p->t = t; 578 p->next = pending_list[f_idx]; 579 pending_list[f_idx] = p; 580 } 581 } 582 583 584 /* Parsing Routines proper. */ 585 586 /* Parse a single symbol. Mostly just make up a GDB symbol for it. 587 For blocks, procedures and types we open a new lexical context. 588 This is basically just a big switch on the symbol's type. Argument 589 AX is the base pointer of aux symbols for this file (fh->iauxBase). 590 EXT_SH points to the unswapped symbol, which is needed for struct, 591 union, etc., types; it is NULL for an EXTR. BIGEND says whether 592 aux symbols are big-endian or little-endian. Return count of 593 SYMR's handled (normally one). */ 594 595 static int 596 parse_symbol (SYMR *sh, union aux_ext *ax, char *ext_sh, int bigend, 597 struct section_offsets *section_offsets, struct objfile *objfile) 598 { 599 const bfd_size_type external_sym_size = debug_swap->external_sym_size; 600 void (*const swap_sym_in) (bfd *, void *, SYMR *) = debug_swap->swap_sym_in; 601 char *name; 602 struct symbol *s; 603 struct block *b; 604 struct mdebug_pending *pend; 605 struct type *t; 606 struct field *f; 607 int count = 1; 608 enum address_class class; 609 TIR tir; 610 long svalue = sh->value; 611 int bitsize; 612 613 if (ext_sh == (char *) NULL) 614 name = debug_info->ssext + sh->iss; 615 else 616 name = debug_info->ss + cur_fdr->issBase + sh->iss; 617 618 switch (sh->sc) 619 { 620 case scText: 621 case scRConst: 622 /* Do not relocate relative values. 623 The value of a stEnd symbol is the displacement from the 624 corresponding start symbol value. 625 The value of a stBlock symbol is the displacement from the 626 procedure address. */ 627 if (sh->st != stEnd && sh->st != stBlock) 628 sh->value += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile)); 629 break; 630 case scData: 631 case scSData: 632 case scRData: 633 case scPData: 634 case scXData: 635 sh->value += ANOFFSET (section_offsets, SECT_OFF_DATA (objfile)); 636 break; 637 case scBss: 638 case scSBss: 639 sh->value += ANOFFSET (section_offsets, SECT_OFF_BSS (objfile)); 640 break; 641 } 642 643 switch (sh->st) 644 { 645 case stNil: 646 break; 647 648 case stGlobal: /* external symbol, goes into global block */ 649 class = LOC_STATIC; 650 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (top_stack->cur_st), 651 GLOBAL_BLOCK); 652 s = new_symbol (name); 653 SYMBOL_VALUE_ADDRESS (s) = (CORE_ADDR) sh->value; 654 goto data; 655 656 case stStatic: /* static data, goes into current block. */ 657 class = LOC_STATIC; 658 b = top_stack->cur_block; 659 s = new_symbol (name); 660 if (SC_IS_COMMON (sh->sc)) 661 { 662 /* It is a FORTRAN common block. At least for SGI Fortran the 663 address is not in the symbol; we need to fix it later in 664 scan_file_globals. */ 665 int bucket = hashname (DEPRECATED_SYMBOL_NAME (s)); 666 SYMBOL_VALUE_CHAIN (s) = global_sym_chain[bucket]; 667 global_sym_chain[bucket] = s; 668 } 669 else 670 SYMBOL_VALUE_ADDRESS (s) = (CORE_ADDR) sh->value; 671 goto data; 672 673 case stLocal: /* local variable, goes into current block */ 674 if (sh->sc == scRegister) 675 { 676 class = LOC_REGISTER; 677 svalue = ECOFF_REG_TO_REGNUM (svalue); 678 } 679 else 680 class = LOC_LOCAL; 681 b = top_stack->cur_block; 682 s = new_symbol (name); 683 SYMBOL_VALUE (s) = svalue; 684 685 data: /* Common code for symbols describing data */ 686 SYMBOL_DOMAIN (s) = VAR_DOMAIN; 687 SYMBOL_CLASS (s) = class; 688 add_symbol (s, b); 689 690 /* Type could be missing if file is compiled without debugging info. */ 691 if (SC_IS_UNDEF (sh->sc) 692 || sh->sc == scNil || sh->index == indexNil) 693 SYMBOL_TYPE (s) = nodebug_var_symbol_type; 694 else 695 SYMBOL_TYPE (s) = parse_type (cur_fd, ax, sh->index, 0, bigend, name); 696 /* Value of a data symbol is its memory address */ 697 break; 698 699 case stParam: /* arg to procedure, goes into current block */ 700 max_gdbinfo++; 701 found_ecoff_debugging_info = 1; 702 top_stack->numargs++; 703 704 /* Special GNU C++ name. */ 705 if (is_cplus_marker (name[0]) && name[1] == 't' && name[2] == 0) 706 name = "this"; /* FIXME, not alloc'd in obstack */ 707 s = new_symbol (name); 708 709 SYMBOL_DOMAIN (s) = VAR_DOMAIN; 710 switch (sh->sc) 711 { 712 case scRegister: 713 /* Pass by value in register. */ 714 SYMBOL_CLASS (s) = LOC_REGPARM; 715 svalue = ECOFF_REG_TO_REGNUM (svalue); 716 break; 717 case scVar: 718 /* Pass by reference on stack. */ 719 SYMBOL_CLASS (s) = LOC_REF_ARG; 720 break; 721 case scVarRegister: 722 /* Pass by reference in register. */ 723 SYMBOL_CLASS (s) = LOC_REGPARM_ADDR; 724 svalue = ECOFF_REG_TO_REGNUM (svalue); 725 break; 726 default: 727 /* Pass by value on stack. */ 728 SYMBOL_CLASS (s) = LOC_ARG; 729 break; 730 } 731 SYMBOL_VALUE (s) = svalue; 732 SYMBOL_TYPE (s) = parse_type (cur_fd, ax, sh->index, 0, bigend, name); 733 add_symbol (s, top_stack->cur_block); 734 break; 735 736 case stLabel: /* label, goes into current block */ 737 s = new_symbol (name); 738 SYMBOL_DOMAIN (s) = VAR_DOMAIN; /* so that it can be used */ 739 SYMBOL_CLASS (s) = LOC_LABEL; /* but not misused */ 740 SYMBOL_VALUE_ADDRESS (s) = (CORE_ADDR) sh->value; 741 SYMBOL_TYPE (s) = mdebug_type_int; 742 add_symbol (s, top_stack->cur_block); 743 break; 744 745 case stProc: /* Procedure, usually goes into global block */ 746 case stStaticProc: /* Static procedure, goes into current block */ 747 /* For stProc symbol records, we need to check the storage class 748 as well, as only (stProc, scText) entries represent "real" 749 procedures - See the Compaq document titled "Object File / 750 Symbol Table Format Specification" for more information. 751 If the storage class is not scText, we discard the whole block 752 of symbol records for this stProc. */ 753 if (sh->st == stProc && sh->sc != scText) 754 { 755 char *ext_tsym = ext_sh; 756 int keep_counting = 1; 757 SYMR tsym; 758 759 while (keep_counting) 760 { 761 ext_tsym += external_sym_size; 762 (*swap_sym_in) (cur_bfd, ext_tsym, &tsym); 763 count++; 764 switch (tsym.st) 765 { 766 case stParam: 767 break; 768 case stEnd: 769 keep_counting = 0; 770 break; 771 default: 772 complaint (&symfile_complaints, 773 "unknown symbol type 0x%x", sh->st); 774 break; 775 } 776 } 777 break; 778 } 779 s = new_symbol (name); 780 SYMBOL_DOMAIN (s) = VAR_DOMAIN; 781 SYMBOL_CLASS (s) = LOC_BLOCK; 782 /* Type of the return value */ 783 if (SC_IS_UNDEF (sh->sc) || sh->sc == scNil) 784 t = mdebug_type_int; 785 else 786 { 787 t = parse_type (cur_fd, ax, sh->index + 1, 0, bigend, name); 788 if (strcmp (name, "malloc") == 0 789 && TYPE_CODE (t) == TYPE_CODE_VOID) 790 { 791 /* I don't know why, but, at least under Alpha GNU/Linux, 792 when linking against a malloc without debugging 793 symbols, its read as a function returning void---this 794 is bad because it means we cannot call functions with 795 string arguments interactively; i.e., "call 796 printf("howdy\n")" would fail with the error message 797 "program has no memory available". To avoid this, we 798 patch up the type and make it void* 799 instead. (davidm@azstarnet.com) 800 */ 801 t = make_pointer_type (t, NULL); 802 } 803 } 804 b = top_stack->cur_block; 805 if (sh->st == stProc) 806 { 807 struct blockvector *bv = BLOCKVECTOR (top_stack->cur_st); 808 /* The next test should normally be true, but provides a 809 hook for nested functions (which we don't want to make 810 global). */ 811 if (b == BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) 812 b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); 813 /* Irix 5 sometimes has duplicate names for the same 814 function. We want to add such names up at the global 815 level, not as a nested function. */ 816 else if (sh->value == top_stack->procadr) 817 b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); 818 } 819 add_symbol (s, b); 820 821 /* Make a type for the procedure itself */ 822 SYMBOL_TYPE (s) = lookup_function_type (t); 823 824 /* All functions in C++ have prototypes. For C we don't have enough 825 information in the debug info. */ 826 if (SYMBOL_LANGUAGE (s) == language_cplus) 827 TYPE_FLAGS (SYMBOL_TYPE (s)) |= TYPE_FLAG_PROTOTYPED; 828 829 /* Create and enter a new lexical context */ 830 b = new_block (FUNCTION_BLOCK); 831 SYMBOL_BLOCK_VALUE (s) = b; 832 BLOCK_FUNCTION (b) = s; 833 BLOCK_START (b) = BLOCK_END (b) = sh->value; 834 BLOCK_SUPERBLOCK (b) = top_stack->cur_block; 835 add_block (b, top_stack->cur_st); 836 837 /* Not if we only have partial info */ 838 if (SC_IS_UNDEF (sh->sc) || sh->sc == scNil) 839 break; 840 841 push_parse_stack (); 842 top_stack->cur_block = b; 843 top_stack->blocktype = sh->st; 844 top_stack->cur_type = SYMBOL_TYPE (s); 845 top_stack->cur_field = -1; 846 top_stack->procadr = sh->value; 847 top_stack->numargs = 0; 848 break; 849 850 /* Beginning of code for structure, union, and enum definitions. 851 They all share a common set of local variables, defined here. */ 852 { 853 enum type_code type_code; 854 char *ext_tsym; 855 int nfields; 856 long max_value; 857 struct field *f; 858 859 case stStruct: /* Start a block defining a struct type */ 860 type_code = TYPE_CODE_STRUCT; 861 goto structured_common; 862 863 case stUnion: /* Start a block defining a union type */ 864 type_code = TYPE_CODE_UNION; 865 goto structured_common; 866 867 case stEnum: /* Start a block defining an enum type */ 868 type_code = TYPE_CODE_ENUM; 869 goto structured_common; 870 871 case stBlock: /* Either a lexical block, or some type */ 872 if (sh->sc != scInfo && !SC_IS_COMMON (sh->sc)) 873 goto case_stBlock_code; /* Lexical block */ 874 875 type_code = TYPE_CODE_UNDEF; /* We have a type. */ 876 877 /* Common code for handling struct, union, enum, and/or as-yet- 878 unknown-type blocks of info about structured data. `type_code' 879 has been set to the proper TYPE_CODE, if we know it. */ 880 structured_common: 881 found_ecoff_debugging_info = 1; 882 push_parse_stack (); 883 top_stack->blocktype = stBlock; 884 885 /* First count the number of fields and the highest value. */ 886 nfields = 0; 887 max_value = 0; 888 for (ext_tsym = ext_sh + external_sym_size; 889 ; 890 ext_tsym += external_sym_size) 891 { 892 SYMR tsym; 893 894 (*swap_sym_in) (cur_bfd, ext_tsym, &tsym); 895 896 switch (tsym.st) 897 { 898 case stEnd: 899 /* C++ encodes class types as structures where there the 900 methods are encoded as stProc. The scope of stProc 901 symbols also ends with stEnd, thus creating a risk of 902 taking the wrong stEnd symbol record as the end of 903 the current struct, which would cause GDB to undercount 904 the real number of fields in this struct. To make sure 905 we really reached the right stEnd symbol record, we 906 check the associated name, and match it against the 907 struct name. Since method names are mangled while 908 the class name is not, there is no risk of having a 909 method whose name is identical to the class name 910 (in particular constructor method names are different 911 from the class name). There is therefore no risk that 912 this check stops the count on the StEnd of a method. 913 914 Also, assume that we're really at the end when tsym.iss 915 is 0 (issNull). */ 916 if (tsym.iss == issNull 917 || strcmp (debug_info->ss + cur_fdr->issBase + tsym.iss, 918 name) == 0) 919 goto end_of_fields; 920 break; 921 922 case stMember: 923 if (nfields == 0 && type_code == TYPE_CODE_UNDEF) 924 { 925 /* If the type of the member is Nil (or Void), 926 without qualifiers, assume the tag is an 927 enumeration. 928 Alpha cc -migrate enums are recognized by a zero 929 index and a zero symbol value. 930 DU 4.0 cc enums are recognized by a member type of 931 btEnum without qualifiers and a zero symbol value. */ 932 if (tsym.index == indexNil 933 || (tsym.index == 0 && sh->value == 0)) 934 type_code = TYPE_CODE_ENUM; 935 else 936 { 937 (*debug_swap->swap_tir_in) (bigend, 938 &ax[tsym.index].a_ti, 939 &tir); 940 if ((tir.bt == btNil || tir.bt == btVoid 941 || (tir.bt == btEnum && sh->value == 0)) 942 && tir.tq0 == tqNil) 943 type_code = TYPE_CODE_ENUM; 944 } 945 } 946 nfields++; 947 if (tsym.value > max_value) 948 max_value = tsym.value; 949 break; 950 951 case stBlock: 952 case stUnion: 953 case stEnum: 954 case stStruct: 955 { 956 #if 0 957 /* This is a no-op; is it trying to tell us something 958 we should be checking? */ 959 if (tsym.sc == scVariant); /*UNIMPLEMENTED */ 960 #endif 961 if (tsym.index != 0) 962 { 963 /* This is something like a struct within a 964 struct. Skip over the fields of the inner 965 struct. The -1 is because the for loop will 966 increment ext_tsym. */ 967 ext_tsym = ((char *) debug_info->external_sym 968 + ((cur_fdr->isymBase + tsym.index - 1) 969 * external_sym_size)); 970 } 971 } 972 break; 973 974 case stTypedef: 975 /* mips cc puts out a typedef for struct x if it is not yet 976 defined when it encounters 977 struct y { struct x *xp; }; 978 Just ignore it. */ 979 break; 980 981 case stIndirect: 982 /* Irix5 cc puts out a stIndirect for struct x if it is not 983 yet defined when it encounters 984 struct y { struct x *xp; }; 985 Just ignore it. */ 986 break; 987 988 default: 989 complaint (&symfile_complaints, 990 "declaration block contains unhandled symbol type %d", 991 tsym.st); 992 } 993 } 994 end_of_fields:; 995 996 /* In an stBlock, there is no way to distinguish structs, 997 unions, and enums at this point. This is a bug in the 998 original design (that has been fixed with the recent 999 addition of the stStruct, stUnion, and stEnum symbol 1000 types.) The way you can tell is if/when you see a variable 1001 or field of that type. In that case the variable's type 1002 (in the AUX table) says if the type is struct, union, or 1003 enum, and points back to the stBlock here. So you can 1004 patch the tag kind up later - but only if there actually is 1005 a variable or field of that type. 1006 1007 So until we know for sure, we will guess at this point. 1008 The heuristic is: 1009 If the first member has index==indexNil or a void type, 1010 assume we have an enumeration. 1011 Otherwise, if there is more than one member, and all 1012 the members have offset 0, assume we have a union. 1013 Otherwise, assume we have a struct. 1014 1015 The heuristic could guess wrong in the case of of an 1016 enumeration with no members or a union with one (or zero) 1017 members, or when all except the last field of a struct have 1018 width zero. These are uncommon and/or illegal situations, 1019 and in any case guessing wrong probably doesn't matter 1020 much. 1021 1022 But if we later do find out we were wrong, we fixup the tag 1023 kind. Members of an enumeration must be handled 1024 differently from struct/union fields, and that is harder to 1025 patch up, but luckily we shouldn't need to. (If there are 1026 any enumeration members, we can tell for sure it's an enum 1027 here.) */ 1028 1029 if (type_code == TYPE_CODE_UNDEF) 1030 { 1031 if (nfields > 1 && max_value == 0) 1032 type_code = TYPE_CODE_UNION; 1033 else 1034 type_code = TYPE_CODE_STRUCT; 1035 } 1036 1037 /* Create a new type or use the pending type. */ 1038 pend = is_pending_symbol (cur_fdr, ext_sh); 1039 if (pend == (struct mdebug_pending *) NULL) 1040 { 1041 t = new_type (NULL); 1042 add_pending (cur_fdr, ext_sh, t); 1043 } 1044 else 1045 t = pend->t; 1046 1047 /* Do not set the tag name if it is a compiler generated tag name 1048 (.Fxx or .xxfake or empty) for unnamed struct/union/enums. 1049 Alpha cc puts out an sh->iss of zero for those. */ 1050 if (sh->iss == 0 || name[0] == '.' || name[0] == '\0') 1051 TYPE_TAG_NAME (t) = NULL; 1052 else 1053 TYPE_TAG_NAME (t) = obconcat (¤t_objfile->objfile_obstack, 1054 "", "", name); 1055 1056 TYPE_CODE (t) = type_code; 1057 TYPE_LENGTH (t) = sh->value; 1058 TYPE_NFIELDS (t) = nfields; 1059 TYPE_FIELDS (t) = f = ((struct field *) 1060 TYPE_ALLOC (t, 1061 nfields * sizeof (struct field))); 1062 1063 if (type_code == TYPE_CODE_ENUM) 1064 { 1065 int unsigned_enum = 1; 1066 1067 /* This is a non-empty enum. */ 1068 1069 /* DEC c89 has the number of enumerators in the sh.value field, 1070 not the type length, so we have to compensate for that 1071 incompatibility quirk. 1072 This might do the wrong thing for an enum with one or two 1073 enumerators and gcc -gcoff -fshort-enums, but these cases 1074 are hopefully rare enough. 1075 Alpha cc -migrate has a sh.value field of zero, we adjust 1076 that too. */ 1077 if (TYPE_LENGTH (t) == TYPE_NFIELDS (t) 1078 || TYPE_LENGTH (t) == 0) 1079 TYPE_LENGTH (t) = TARGET_INT_BIT / HOST_CHAR_BIT; 1080 for (ext_tsym = ext_sh + external_sym_size; 1081 ; 1082 ext_tsym += external_sym_size) 1083 { 1084 SYMR tsym; 1085 struct symbol *enum_sym; 1086 1087 (*swap_sym_in) (cur_bfd, ext_tsym, &tsym); 1088 1089 if (tsym.st != stMember) 1090 break; 1091 1092 FIELD_BITPOS (*f) = tsym.value; 1093 FIELD_TYPE (*f) = t; 1094 FIELD_NAME (*f) = debug_info->ss + cur_fdr->issBase + tsym.iss; 1095 FIELD_BITSIZE (*f) = 0; 1096 FIELD_STATIC_KIND (*f) = 0; 1097 1098 enum_sym = ((struct symbol *) 1099 obstack_alloc (¤t_objfile->objfile_obstack, 1100 sizeof (struct symbol))); 1101 memset (enum_sym, 0, sizeof (struct symbol)); 1102 DEPRECATED_SYMBOL_NAME (enum_sym) = 1103 obsavestring (f->name, strlen (f->name), 1104 ¤t_objfile->objfile_obstack); 1105 SYMBOL_CLASS (enum_sym) = LOC_CONST; 1106 SYMBOL_TYPE (enum_sym) = t; 1107 SYMBOL_DOMAIN (enum_sym) = VAR_DOMAIN; 1108 SYMBOL_VALUE (enum_sym) = tsym.value; 1109 if (SYMBOL_VALUE (enum_sym) < 0) 1110 unsigned_enum = 0; 1111 add_symbol (enum_sym, top_stack->cur_block); 1112 1113 /* Skip the stMembers that we've handled. */ 1114 count++; 1115 f++; 1116 } 1117 if (unsigned_enum) 1118 TYPE_FLAGS (t) |= TYPE_FLAG_UNSIGNED; 1119 } 1120 /* make this the current type */ 1121 top_stack->cur_type = t; 1122 top_stack->cur_field = 0; 1123 1124 /* Do not create a symbol for alpha cc unnamed structs. */ 1125 if (sh->iss == 0) 1126 break; 1127 1128 /* gcc puts out an empty struct for an opaque struct definitions, 1129 do not create a symbol for it either. */ 1130 if (TYPE_NFIELDS (t) == 0) 1131 { 1132 TYPE_FLAGS (t) |= TYPE_FLAG_STUB; 1133 break; 1134 } 1135 1136 s = new_symbol (name); 1137 SYMBOL_DOMAIN (s) = STRUCT_DOMAIN; 1138 SYMBOL_CLASS (s) = LOC_TYPEDEF; 1139 SYMBOL_VALUE (s) = 0; 1140 SYMBOL_TYPE (s) = t; 1141 add_symbol (s, top_stack->cur_block); 1142 break; 1143 1144 /* End of local variables shared by struct, union, enum, and 1145 block (as yet unknown struct/union/enum) processing. */ 1146 } 1147 1148 case_stBlock_code: 1149 found_ecoff_debugging_info = 1; 1150 /* beginnning of (code) block. Value of symbol 1151 is the displacement from procedure start */ 1152 push_parse_stack (); 1153 1154 /* Do not start a new block if this is the outermost block of a 1155 procedure. This allows the LOC_BLOCK symbol to point to the 1156 block with the local variables, so funcname::var works. */ 1157 if (top_stack->blocktype == stProc 1158 || top_stack->blocktype == stStaticProc) 1159 { 1160 top_stack->blocktype = stNil; 1161 break; 1162 } 1163 1164 top_stack->blocktype = stBlock; 1165 b = new_block (NON_FUNCTION_BLOCK); 1166 BLOCK_START (b) = sh->value + top_stack->procadr; 1167 BLOCK_SUPERBLOCK (b) = top_stack->cur_block; 1168 top_stack->cur_block = b; 1169 add_block (b, top_stack->cur_st); 1170 break; 1171 1172 case stEnd: /* end (of anything) */ 1173 if (sh->sc == scInfo || SC_IS_COMMON (sh->sc)) 1174 { 1175 /* Finished with type */ 1176 top_stack->cur_type = 0; 1177 } 1178 else if (sh->sc == scText && 1179 (top_stack->blocktype == stProc || 1180 top_stack->blocktype == stStaticProc)) 1181 { 1182 /* Finished with procedure */ 1183 struct blockvector *bv = BLOCKVECTOR (top_stack->cur_st); 1184 struct mips_extra_func_info *e; 1185 struct block *b = top_stack->cur_block; 1186 struct type *ftype = top_stack->cur_type; 1187 int i; 1188 1189 BLOCK_END (top_stack->cur_block) += sh->value; /* size */ 1190 1191 /* Make up special symbol to contain procedure specific info */ 1192 s = new_symbol (MIPS_EFI_SYMBOL_NAME); 1193 SYMBOL_DOMAIN (s) = LABEL_DOMAIN; 1194 SYMBOL_CLASS (s) = LOC_CONST; 1195 SYMBOL_TYPE (s) = mdebug_type_void; 1196 e = ((struct mips_extra_func_info *) 1197 obstack_alloc (¤t_objfile->objfile_obstack, 1198 sizeof (struct mips_extra_func_info))); 1199 memset (e, 0, sizeof (struct mips_extra_func_info)); 1200 SYMBOL_VALUE (s) = (long) e; 1201 e->numargs = top_stack->numargs; 1202 e->pdr.framereg = -1; 1203 add_symbol (s, top_stack->cur_block); 1204 1205 /* f77 emits proc-level with address bounds==[0,0], 1206 So look for such child blocks, and patch them. */ 1207 for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); i++) 1208 { 1209 struct block *b_bad = BLOCKVECTOR_BLOCK (bv, i); 1210 if (BLOCK_SUPERBLOCK (b_bad) == b 1211 && BLOCK_START (b_bad) == top_stack->procadr 1212 && BLOCK_END (b_bad) == top_stack->procadr) 1213 { 1214 BLOCK_START (b_bad) = BLOCK_START (b); 1215 BLOCK_END (b_bad) = BLOCK_END (b); 1216 } 1217 } 1218 1219 if (TYPE_NFIELDS (ftype) <= 0) 1220 { 1221 /* No parameter type information is recorded with the function's 1222 type. Set that from the type of the parameter symbols. */ 1223 int nparams = top_stack->numargs; 1224 int iparams; 1225 struct symbol *sym; 1226 1227 if (nparams > 0) 1228 { 1229 struct dict_iterator iter; 1230 TYPE_NFIELDS (ftype) = nparams; 1231 TYPE_FIELDS (ftype) = (struct field *) 1232 TYPE_ALLOC (ftype, nparams * sizeof (struct field)); 1233 1234 iparams = 0; 1235 ALL_BLOCK_SYMBOLS (b, iter, sym) 1236 { 1237 if (iparams == nparams) 1238 break; 1239 1240 switch (SYMBOL_CLASS (sym)) 1241 { 1242 case LOC_ARG: 1243 case LOC_REF_ARG: 1244 case LOC_REGPARM: 1245 case LOC_REGPARM_ADDR: 1246 TYPE_FIELD_TYPE (ftype, iparams) = SYMBOL_TYPE (sym); 1247 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; 1248 iparams++; 1249 break; 1250 default: 1251 break; 1252 } 1253 } 1254 } 1255 } 1256 } 1257 else if (sh->sc == scText && top_stack->blocktype == stBlock) 1258 { 1259 /* End of (code) block. The value of the symbol is the 1260 displacement from the procedure`s start address of the 1261 end of this block. */ 1262 BLOCK_END (top_stack->cur_block) = sh->value + top_stack->procadr; 1263 } 1264 else if (sh->sc == scText && top_stack->blocktype == stNil) 1265 { 1266 /* End of outermost block. Pop parse stack and ignore. The 1267 following stEnd of stProc will take care of the block. */ 1268 ; 1269 } 1270 else if (sh->sc == scText && top_stack->blocktype == stFile) 1271 { 1272 /* End of file. Pop parse stack and ignore. Higher 1273 level code deals with this. */ 1274 ; 1275 } 1276 else 1277 complaint (&symfile_complaints, 1278 "stEnd with storage class %d not handled", sh->sc); 1279 1280 pop_parse_stack (); /* restore previous lexical context */ 1281 break; 1282 1283 case stMember: /* member of struct or union */ 1284 f = &TYPE_FIELDS (top_stack->cur_type)[top_stack->cur_field++]; 1285 FIELD_NAME (*f) = name; 1286 FIELD_BITPOS (*f) = sh->value; 1287 bitsize = 0; 1288 FIELD_TYPE (*f) = parse_type (cur_fd, ax, sh->index, &bitsize, bigend, name); 1289 FIELD_BITSIZE (*f) = bitsize; 1290 FIELD_STATIC_KIND (*f) = 0; 1291 break; 1292 1293 case stIndirect: /* forward declaration on Irix5 */ 1294 /* Forward declarations from Irix5 cc are handled by cross_ref, 1295 skip them. */ 1296 break; 1297 1298 case stTypedef: /* type definition */ 1299 found_ecoff_debugging_info = 1; 1300 1301 /* Typedefs for forward declarations and opaque structs from alpha cc 1302 are handled by cross_ref, skip them. */ 1303 if (sh->iss == 0) 1304 break; 1305 1306 /* Parse the type or use the pending type. */ 1307 pend = is_pending_symbol (cur_fdr, ext_sh); 1308 if (pend == (struct mdebug_pending *) NULL) 1309 { 1310 t = parse_type (cur_fd, ax, sh->index, (int *) NULL, bigend, name); 1311 add_pending (cur_fdr, ext_sh, t); 1312 } 1313 else 1314 t = pend->t; 1315 1316 /* mips cc puts out a typedef with the name of the struct for forward 1317 declarations. These should not go into the symbol table and 1318 TYPE_NAME should not be set for them. 1319 They can't be distinguished from an intentional typedef to 1320 the same name however: 1321 x.h: 1322 struct x { int ix; int jx; }; 1323 struct xx; 1324 x.c: 1325 typedef struct x x; 1326 struct xx {int ixx; int jxx; }; 1327 generates a cross referencing stTypedef for x and xx. 1328 The user visible effect of this is that the type of a pointer 1329 to struct foo sometimes is given as `foo *' instead of `struct foo *'. 1330 The problem is fixed with alpha cc and Irix5 cc. */ 1331 1332 /* However if the typedef cross references to an opaque aggregate, it 1333 is safe to omit it from the symbol table. */ 1334 1335 if (has_opaque_xref (cur_fdr, sh)) 1336 break; 1337 s = new_symbol (name); 1338 SYMBOL_DOMAIN (s) = VAR_DOMAIN; 1339 SYMBOL_CLASS (s) = LOC_TYPEDEF; 1340 SYMBOL_BLOCK_VALUE (s) = top_stack->cur_block; 1341 SYMBOL_TYPE (s) = t; 1342 add_symbol (s, top_stack->cur_block); 1343 1344 /* Incomplete definitions of structs should not get a name. */ 1345 if (TYPE_NAME (SYMBOL_TYPE (s)) == NULL 1346 && (TYPE_NFIELDS (SYMBOL_TYPE (s)) != 0 1347 || (TYPE_CODE (SYMBOL_TYPE (s)) != TYPE_CODE_STRUCT 1348 && TYPE_CODE (SYMBOL_TYPE (s)) != TYPE_CODE_UNION))) 1349 { 1350 if (TYPE_CODE (SYMBOL_TYPE (s)) == TYPE_CODE_PTR 1351 || TYPE_CODE (SYMBOL_TYPE (s)) == TYPE_CODE_FUNC) 1352 { 1353 /* If we are giving a name to a type such as "pointer to 1354 foo" or "function returning foo", we better not set 1355 the TYPE_NAME. If the program contains "typedef char 1356 *caddr_t;", we don't want all variables of type char 1357 * to print as caddr_t. This is not just a 1358 consequence of GDB's type management; CC and GCC (at 1359 least through version 2.4) both output variables of 1360 either type char * or caddr_t with the type 1361 refering to the stTypedef symbol for caddr_t. If a future 1362 compiler cleans this up it GDB is not ready for it 1363 yet, but if it becomes ready we somehow need to 1364 disable this check (without breaking the PCC/GCC2.4 1365 case). 1366 1367 Sigh. 1368 1369 Fortunately, this check seems not to be necessary 1370 for anything except pointers or functions. */ 1371 } 1372 else 1373 TYPE_NAME (SYMBOL_TYPE (s)) = DEPRECATED_SYMBOL_NAME (s); 1374 } 1375 break; 1376 1377 case stFile: /* file name */ 1378 push_parse_stack (); 1379 top_stack->blocktype = sh->st; 1380 break; 1381 1382 /* I`ve never seen these for C */ 1383 case stRegReloc: 1384 break; /* register relocation */ 1385 case stForward: 1386 break; /* forwarding address */ 1387 case stConstant: 1388 break; /* constant */ 1389 default: 1390 complaint (&symfile_complaints, "unknown symbol type 0x%x", sh->st); 1391 break; 1392 } 1393 1394 return count; 1395 } 1396 1397 /* Parse the type information provided in the raw AX entries for 1398 the symbol SH. Return the bitfield size in BS, in case. 1399 We must byte-swap the AX entries before we use them; BIGEND says whether 1400 they are big-endian or little-endian (from fh->fBigendian). */ 1401 1402 static struct type * 1403 parse_type (int fd, union aux_ext *ax, unsigned int aux_index, int *bs, 1404 int bigend, char *sym_name) 1405 { 1406 /* Null entries in this map are treated specially */ 1407 static struct type **map_bt[] = 1408 { 1409 &mdebug_type_void, /* btNil */ 1410 &mdebug_type_adr_32, /* btAdr */ 1411 &mdebug_type_char, /* btChar */ 1412 &mdebug_type_unsigned_char, /* btUChar */ 1413 &mdebug_type_short, /* btShort */ 1414 &mdebug_type_unsigned_short, /* btUShort */ 1415 &mdebug_type_int_32, /* btInt */ 1416 &mdebug_type_unsigned_int_32, /* btUInt */ 1417 &mdebug_type_long_32, /* btLong */ 1418 &mdebug_type_unsigned_long_32, /* btULong */ 1419 &mdebug_type_float, /* btFloat */ 1420 &mdebug_type_double, /* btDouble */ 1421 0, /* btStruct */ 1422 0, /* btUnion */ 1423 0, /* btEnum */ 1424 0, /* btTypedef */ 1425 0, /* btRange */ 1426 0, /* btSet */ 1427 &mdebug_type_complex, /* btComplex */ 1428 &mdebug_type_double_complex, /* btDComplex */ 1429 0, /* btIndirect */ 1430 &mdebug_type_fixed_dec, /* btFixedDec */ 1431 &mdebug_type_float_dec, /* btFloatDec */ 1432 &mdebug_type_string, /* btString */ 1433 0, /* btBit */ 1434 0, /* btPicture */ 1435 &mdebug_type_void, /* btVoid */ 1436 0, /* DEC C++: Pointer to member */ 1437 0, /* DEC C++: Virtual function table */ 1438 0, /* DEC C++: Class (Record) */ 1439 &mdebug_type_long_64, /* btLong64 */ 1440 &mdebug_type_unsigned_long_64, /* btULong64 */ 1441 &mdebug_type_long_long_64, /* btLongLong64 */ 1442 &mdebug_type_unsigned_long_long_64, /* btULongLong64 */ 1443 &mdebug_type_adr_64, /* btAdr64 */ 1444 &mdebug_type_int_64, /* btInt64 */ 1445 &mdebug_type_unsigned_int_64, /* btUInt64 */ 1446 }; 1447 1448 TIR t[1]; 1449 struct type *tp = 0; 1450 enum type_code type_code = TYPE_CODE_UNDEF; 1451 1452 /* Handle undefined types, they have indexNil. */ 1453 if (aux_index == indexNil) 1454 return mdebug_type_int; 1455 1456 /* Handle corrupt aux indices. */ 1457 if (aux_index >= (debug_info->fdr + fd)->caux) 1458 { 1459 index_complaint (sym_name); 1460 return mdebug_type_int; 1461 } 1462 ax += aux_index; 1463 1464 /* Use aux as a type information record, map its basic type. */ 1465 (*debug_swap->swap_tir_in) (bigend, &ax->a_ti, t); 1466 if (t->bt >= (sizeof (map_bt) / sizeof (*map_bt))) 1467 { 1468 basic_type_complaint (t->bt, sym_name); 1469 return mdebug_type_int; 1470 } 1471 if (map_bt[t->bt]) 1472 { 1473 tp = *map_bt[t->bt]; 1474 } 1475 else 1476 { 1477 tp = NULL; 1478 /* Cannot use builtin types -- build our own */ 1479 switch (t->bt) 1480 { 1481 case btStruct: 1482 type_code = TYPE_CODE_STRUCT; 1483 break; 1484 case btUnion: 1485 type_code = TYPE_CODE_UNION; 1486 break; 1487 case btEnum: 1488 type_code = TYPE_CODE_ENUM; 1489 break; 1490 case btRange: 1491 type_code = TYPE_CODE_RANGE; 1492 break; 1493 case btSet: 1494 type_code = TYPE_CODE_SET; 1495 break; 1496 case btIndirect: 1497 /* alpha cc -migrate uses this for typedefs. The true type will 1498 be obtained by crossreferencing below. */ 1499 type_code = TYPE_CODE_ERROR; 1500 break; 1501 case btTypedef: 1502 /* alpha cc uses this for typedefs. The true type will be 1503 obtained by crossreferencing below. */ 1504 type_code = TYPE_CODE_ERROR; 1505 break; 1506 default: 1507 basic_type_complaint (t->bt, sym_name); 1508 return mdebug_type_int; 1509 } 1510 } 1511 1512 /* Move on to next aux */ 1513 ax++; 1514 1515 if (t->fBitfield) 1516 { 1517 int width = AUX_GET_WIDTH (bigend, ax); 1518 /* Inhibit core dumps if TIR is corrupted. */ 1519 if (bs == (int *) NULL) 1520 { 1521 /* Alpha cc -migrate encodes char and unsigned char types 1522 as short and unsigned short types with a field width of 8. 1523 Enum types also have a field width which we ignore for now. */ 1524 if (t->bt == btShort && width == 8) 1525 tp = mdebug_type_char; 1526 else if (t->bt == btUShort && width == 8) 1527 tp = mdebug_type_unsigned_char; 1528 else if (t->bt == btEnum) 1529 ; 1530 else 1531 complaint (&symfile_complaints, "can't handle TIR fBitfield for %s", 1532 sym_name); 1533 } 1534 else 1535 *bs = width; 1536 ax++; 1537 } 1538 1539 /* A btIndirect entry cross references to an aux entry containing 1540 the type. */ 1541 if (t->bt == btIndirect) 1542 { 1543 RNDXR rn[1]; 1544 int rf; 1545 FDR *xref_fh; 1546 int xref_fd; 1547 1548 (*debug_swap->swap_rndx_in) (bigend, &ax->a_rndx, rn); 1549 ax++; 1550 if (rn->rfd == 0xfff) 1551 { 1552 rf = AUX_GET_ISYM (bigend, ax); 1553 ax++; 1554 } 1555 else 1556 rf = rn->rfd; 1557 1558 if (rf == -1) 1559 { 1560 complaint (&symfile_complaints, 1561 "unable to cross ref btIndirect for %s", sym_name); 1562 return mdebug_type_int; 1563 } 1564 xref_fh = get_rfd (fd, rf); 1565 xref_fd = xref_fh - debug_info->fdr; 1566 tp = parse_type (xref_fd, debug_info->external_aux + xref_fh->iauxBase, 1567 rn->index, (int *) NULL, xref_fh->fBigendian, sym_name); 1568 } 1569 1570 /* All these types really point to some (common) MIPS type 1571 definition, and only the type-qualifiers fully identify 1572 them. We'll make the same effort at sharing. */ 1573 if (t->bt == btStruct || 1574 t->bt == btUnion || 1575 t->bt == btEnum || 1576 1577 /* btSet (I think) implies that the name is a tag name, not a typedef 1578 name. This apparently is a MIPS extension for C sets. */ 1579 t->bt == btSet) 1580 { 1581 char *name; 1582 1583 /* Try to cross reference this type, build new type on failure. */ 1584 ax += cross_ref (fd, ax, &tp, type_code, &name, bigend, sym_name); 1585 if (tp == (struct type *) NULL) 1586 tp = init_type (type_code, 0, 0, (char *) NULL, current_objfile); 1587 1588 /* DEC c89 produces cross references to qualified aggregate types, 1589 dereference them. */ 1590 while (TYPE_CODE (tp) == TYPE_CODE_PTR 1591 || TYPE_CODE (tp) == TYPE_CODE_ARRAY) 1592 tp = TYPE_TARGET_TYPE (tp); 1593 1594 /* Make sure that TYPE_CODE(tp) has an expected type code. 1595 Any type may be returned from cross_ref if file indirect entries 1596 are corrupted. */ 1597 if (TYPE_CODE (tp) != TYPE_CODE_STRUCT 1598 && TYPE_CODE (tp) != TYPE_CODE_UNION 1599 && TYPE_CODE (tp) != TYPE_CODE_ENUM) 1600 { 1601 unexpected_type_code_complaint (sym_name); 1602 } 1603 else 1604 { 1605 1606 /* Usually, TYPE_CODE(tp) is already type_code. The main 1607 exception is if we guessed wrong re struct/union/enum. 1608 But for struct vs. union a wrong guess is harmless, so 1609 don't complain(). */ 1610 if ((TYPE_CODE (tp) == TYPE_CODE_ENUM 1611 && type_code != TYPE_CODE_ENUM) 1612 || (TYPE_CODE (tp) != TYPE_CODE_ENUM 1613 && type_code == TYPE_CODE_ENUM)) 1614 { 1615 bad_tag_guess_complaint (sym_name); 1616 } 1617 1618 if (TYPE_CODE (tp) != type_code) 1619 { 1620 TYPE_CODE (tp) = type_code; 1621 } 1622 1623 /* Do not set the tag name if it is a compiler generated tag name 1624 (.Fxx or .xxfake or empty) for unnamed struct/union/enums. */ 1625 if (name[0] == '.' || name[0] == '\0') 1626 TYPE_TAG_NAME (tp) = NULL; 1627 else if (TYPE_TAG_NAME (tp) == NULL 1628 || strcmp (TYPE_TAG_NAME (tp), name) != 0) 1629 TYPE_TAG_NAME (tp) = obsavestring (name, strlen (name), 1630 ¤t_objfile->objfile_obstack); 1631 } 1632 } 1633 1634 /* All these types really point to some (common) MIPS type 1635 definition, and only the type-qualifiers fully identify 1636 them. We'll make the same effort at sharing. 1637 FIXME: We are not doing any guessing on range types. */ 1638 if (t->bt == btRange) 1639 { 1640 char *name; 1641 1642 /* Try to cross reference this type, build new type on failure. */ 1643 ax += cross_ref (fd, ax, &tp, type_code, &name, bigend, sym_name); 1644 if (tp == (struct type *) NULL) 1645 tp = init_type (type_code, 0, 0, (char *) NULL, current_objfile); 1646 1647 /* Make sure that TYPE_CODE(tp) has an expected type code. 1648 Any type may be returned from cross_ref if file indirect entries 1649 are corrupted. */ 1650 if (TYPE_CODE (tp) != TYPE_CODE_RANGE) 1651 { 1652 unexpected_type_code_complaint (sym_name); 1653 } 1654 else 1655 { 1656 /* Usually, TYPE_CODE(tp) is already type_code. The main 1657 exception is if we guessed wrong re struct/union/enum. */ 1658 if (TYPE_CODE (tp) != type_code) 1659 { 1660 bad_tag_guess_complaint (sym_name); 1661 TYPE_CODE (tp) = type_code; 1662 } 1663 if (TYPE_NAME (tp) == NULL 1664 || strcmp (TYPE_NAME (tp), name) != 0) 1665 TYPE_NAME (tp) = obsavestring (name, strlen (name), 1666 ¤t_objfile->objfile_obstack); 1667 } 1668 } 1669 if (t->bt == btTypedef) 1670 { 1671 char *name; 1672 1673 /* Try to cross reference this type, it should succeed. */ 1674 ax += cross_ref (fd, ax, &tp, type_code, &name, bigend, sym_name); 1675 if (tp == (struct type *) NULL) 1676 { 1677 complaint (&symfile_complaints, 1678 "unable to cross ref btTypedef for %s", sym_name); 1679 tp = mdebug_type_int; 1680 } 1681 } 1682 1683 /* Deal with range types */ 1684 if (t->bt == btRange) 1685 { 1686 TYPE_NFIELDS (tp) = 2; 1687 TYPE_FIELDS (tp) = ((struct field *) 1688 TYPE_ALLOC (tp, 2 * sizeof (struct field))); 1689 TYPE_FIELD_NAME (tp, 0) = obsavestring ("Low", strlen ("Low"), 1690 ¤t_objfile->objfile_obstack); 1691 TYPE_FIELD_BITPOS (tp, 0) = AUX_GET_DNLOW (bigend, ax); 1692 ax++; 1693 TYPE_FIELD_NAME (tp, 1) = obsavestring ("High", strlen ("High"), 1694 ¤t_objfile->objfile_obstack); 1695 TYPE_FIELD_BITPOS (tp, 1) = AUX_GET_DNHIGH (bigend, ax); 1696 ax++; 1697 } 1698 1699 /* Parse all the type qualifiers now. If there are more 1700 than 6 the game will continue in the next aux */ 1701 1702 while (1) 1703 { 1704 #define PARSE_TQ(tq) \ 1705 if (t->tq != tqNil) \ 1706 ax += upgrade_type(fd, &tp, t->tq, ax, bigend, sym_name); \ 1707 else \ 1708 break; 1709 1710 PARSE_TQ (tq0); 1711 PARSE_TQ (tq1); 1712 PARSE_TQ (tq2); 1713 PARSE_TQ (tq3); 1714 PARSE_TQ (tq4); 1715 PARSE_TQ (tq5); 1716 #undef PARSE_TQ 1717 1718 /* mips cc 2.x and gcc never put out continued aux entries. */ 1719 if (!t->continued) 1720 break; 1721 1722 (*debug_swap->swap_tir_in) (bigend, &ax->a_ti, t); 1723 ax++; 1724 } 1725 1726 /* Complain for illegal continuations due to corrupt aux entries. */ 1727 if (t->continued) 1728 complaint (&symfile_complaints, "illegal TIR continued for %s", sym_name); 1729 1730 return tp; 1731 } 1732 1733 /* Make up a complex type from a basic one. Type is passed by 1734 reference in TPP and side-effected as necessary. The type 1735 qualifier TQ says how to handle the aux symbols at AX for 1736 the symbol SX we are currently analyzing. BIGEND says whether 1737 aux symbols are big-endian or little-endian. 1738 Returns the number of aux symbols we parsed. */ 1739 1740 static int 1741 upgrade_type (int fd, struct type **tpp, int tq, union aux_ext *ax, int bigend, 1742 char *sym_name) 1743 { 1744 int off; 1745 struct type *t; 1746 1747 /* Used in array processing */ 1748 int rf, id; 1749 FDR *fh; 1750 struct type *range; 1751 struct type *indx; 1752 int lower, upper; 1753 RNDXR rndx; 1754 1755 switch (tq) 1756 { 1757 case tqPtr: 1758 t = lookup_pointer_type (*tpp); 1759 *tpp = t; 1760 return 0; 1761 1762 case tqProc: 1763 t = lookup_function_type (*tpp); 1764 *tpp = t; 1765 return 0; 1766 1767 case tqArray: 1768 off = 0; 1769 1770 /* Determine and record the domain type (type of index) */ 1771 (*debug_swap->swap_rndx_in) (bigend, &ax->a_rndx, &rndx); 1772 id = rndx.index; 1773 rf = rndx.rfd; 1774 if (rf == 0xfff) 1775 { 1776 ax++; 1777 rf = AUX_GET_ISYM (bigend, ax); 1778 off++; 1779 } 1780 fh = get_rfd (fd, rf); 1781 1782 indx = parse_type (fh - debug_info->fdr, 1783 debug_info->external_aux + fh->iauxBase, 1784 id, (int *) NULL, bigend, sym_name); 1785 1786 /* The bounds type should be an integer type, but might be anything 1787 else due to corrupt aux entries. */ 1788 if (TYPE_CODE (indx) != TYPE_CODE_INT) 1789 { 1790 complaint (&symfile_complaints, 1791 "illegal array index type for %s, assuming int", sym_name); 1792 indx = mdebug_type_int; 1793 } 1794 1795 /* Get the bounds, and create the array type. */ 1796 ax++; 1797 lower = AUX_GET_DNLOW (bigend, ax); 1798 ax++; 1799 upper = AUX_GET_DNHIGH (bigend, ax); 1800 ax++; 1801 rf = AUX_GET_WIDTH (bigend, ax); /* bit size of array element */ 1802 1803 range = create_range_type ((struct type *) NULL, indx, 1804 lower, upper); 1805 1806 t = create_array_type ((struct type *) NULL, *tpp, range); 1807 1808 /* We used to fill in the supplied array element bitsize 1809 here if the TYPE_LENGTH of the target type was zero. 1810 This happens for a `pointer to an array of anonymous structs', 1811 but in this case the array element bitsize is also zero, 1812 so nothing is gained. 1813 And we used to check the TYPE_LENGTH of the target type against 1814 the supplied array element bitsize. 1815 gcc causes a mismatch for `pointer to array of object', 1816 since the sdb directives it uses do not have a way of 1817 specifying the bitsize, but it does no harm (the 1818 TYPE_LENGTH should be correct) and we should be able to 1819 ignore the erroneous bitsize from the auxiliary entry safely. 1820 dbx seems to ignore it too. */ 1821 1822 /* TYPE_FLAG_TARGET_STUB now takes care of the zero TYPE_LENGTH 1823 problem. */ 1824 if (TYPE_LENGTH (*tpp) == 0) 1825 { 1826 TYPE_FLAGS (t) |= TYPE_FLAG_TARGET_STUB; 1827 } 1828 1829 *tpp = t; 1830 return 4 + off; 1831 1832 case tqVol: 1833 /* Volatile -- currently ignored */ 1834 return 0; 1835 1836 case tqConst: 1837 /* Const -- currently ignored */ 1838 return 0; 1839 1840 default: 1841 complaint (&symfile_complaints, "unknown type qualifier 0x%x", tq); 1842 return 0; 1843 } 1844 } 1845 1846 1847 /* Parse a procedure descriptor record PR. Note that the procedure is 1848 parsed _after_ the local symbols, now we just insert the extra 1849 information we need into a MIPS_EFI_SYMBOL_NAME symbol that has 1850 already been placed in the procedure's main block. Note also that 1851 images that have been partially stripped (ld -x) have been deprived 1852 of local symbols, and we have to cope with them here. FIRST_OFF is 1853 the offset of the first procedure for this FDR; we adjust the 1854 address by this amount, but I don't know why. SEARCH_SYMTAB is the symtab 1855 to look for the function which contains the MIPS_EFI_SYMBOL_NAME symbol 1856 in question, or NULL to use top_stack->cur_block. */ 1857 1858 static void parse_procedure (PDR *, struct symtab *, struct partial_symtab *); 1859 1860 static void 1861 parse_procedure (PDR *pr, struct symtab *search_symtab, 1862 struct partial_symtab *pst) 1863 { 1864 struct symbol *s, *i; 1865 struct block *b; 1866 struct mips_extra_func_info *e; 1867 char *sh_name; 1868 1869 /* Simple rule to find files linked "-x" */ 1870 if (cur_fdr->rss == -1) 1871 { 1872 if (pr->isym == -1) 1873 { 1874 /* Static procedure at address pr->adr. Sigh. */ 1875 /* FIXME-32x64. assuming pr->adr fits in long. */ 1876 complaint (&symfile_complaints, 1877 "can't handle PDR for static proc at 0x%lx", 1878 (unsigned long) pr->adr); 1879 return; 1880 } 1881 else 1882 { 1883 /* external */ 1884 EXTR she; 1885 1886 (*debug_swap->swap_ext_in) (cur_bfd, 1887 ((char *) debug_info->external_ext 1888 + (pr->isym 1889 * debug_swap->external_ext_size)), 1890 &she); 1891 sh_name = debug_info->ssext + she.asym.iss; 1892 } 1893 } 1894 else 1895 { 1896 /* Full symbols */ 1897 SYMR sh; 1898 1899 (*debug_swap->swap_sym_in) (cur_bfd, 1900 ((char *) debug_info->external_sym 1901 + ((cur_fdr->isymBase + pr->isym) 1902 * debug_swap->external_sym_size)), 1903 &sh); 1904 sh_name = debug_info->ss + cur_fdr->issBase + sh.iss; 1905 } 1906 1907 if (search_symtab != NULL) 1908 { 1909 #if 0 1910 /* This loses both in the case mentioned (want a static, find a global), 1911 but also if we are looking up a non-mangled name which happens to 1912 match the name of a mangled function. */ 1913 /* We have to save the cur_fdr across the call to lookup_symbol. 1914 If the pdr is for a static function and if a global function with 1915 the same name exists, lookup_symbol will eventually read in the symtab 1916 for the global function and clobber cur_fdr. */ 1917 FDR *save_cur_fdr = cur_fdr; 1918 s = lookup_symbol (sh_name, NULL, VAR_DOMAIN, 0, NULL); 1919 cur_fdr = save_cur_fdr; 1920 #else 1921 s = mylookup_symbol 1922 (sh_name, 1923 BLOCKVECTOR_BLOCK (BLOCKVECTOR (search_symtab), STATIC_BLOCK), 1924 VAR_DOMAIN, 1925 LOC_BLOCK); 1926 #endif 1927 } 1928 else 1929 s = mylookup_symbol (sh_name, top_stack->cur_block, 1930 VAR_DOMAIN, LOC_BLOCK); 1931 1932 if (s != 0) 1933 { 1934 b = SYMBOL_BLOCK_VALUE (s); 1935 } 1936 else 1937 { 1938 complaint (&symfile_complaints, "PDR for %s, but no symbol", sh_name); 1939 #if 1 1940 return; 1941 #else 1942 /* FIXME -- delete. We can't do symbol allocation now; it's all done. */ 1943 s = new_symbol (sh_name); 1944 SYMBOL_DOMAIN (s) = VAR_DOMAIN; 1945 SYMBOL_CLASS (s) = LOC_BLOCK; 1946 /* Donno its type, hope int is ok */ 1947 SYMBOL_TYPE (s) = lookup_function_type (mdebug_type_int); 1948 add_symbol (s, top_stack->cur_block); 1949 /* Wont have symbols for this one */ 1950 b = new_block (2); 1951 SYMBOL_BLOCK_VALUE (s) = b; 1952 BLOCK_FUNCTION (b) = s; 1953 BLOCK_START (b) = pr->adr; 1954 /* BOUND used to be the end of procedure's text, but the 1955 argument is no longer passed in. */ 1956 BLOCK_END (b) = bound; 1957 BLOCK_SUPERBLOCK (b) = top_stack->cur_block; 1958 add_block (b, top_stack->cur_st); 1959 #endif 1960 } 1961 1962 i = mylookup_symbol (MIPS_EFI_SYMBOL_NAME, b, LABEL_DOMAIN, LOC_CONST); 1963 1964 if (i) 1965 { 1966 e = (struct mips_extra_func_info *) SYMBOL_VALUE (i); 1967 e->pdr = *pr; 1968 e->pdr.isym = (long) s; 1969 1970 /* GDB expects the absolute function start address for the 1971 procedure descriptor in e->pdr.adr. 1972 As the address in the procedure descriptor is usually relative, 1973 we would have to relocate e->pdr.adr with cur_fdr->adr and 1974 ANOFFSET (pst->section_offsets, SECT_OFF_TEXT (pst->objfile)). 1975 Unfortunately cur_fdr->adr and e->pdr.adr are both absolute 1976 in shared libraries on some systems, and on other systems 1977 e->pdr.adr is sometimes offset by a bogus value. 1978 To work around these problems, we replace e->pdr.adr with 1979 the start address of the function. */ 1980 e->pdr.adr = BLOCK_START (b); 1981 1982 /* Correct incorrect setjmp procedure descriptor from the library 1983 to make backtrace through setjmp work. */ 1984 if (e->pdr.pcreg == 0 1985 && strcmp (sh_name, "setjmp") == 0) 1986 { 1987 complaint (&symfile_complaints, "fixing bad setjmp PDR from libc"); 1988 e->pdr.pcreg = RA_REGNUM; 1989 e->pdr.regmask = 0x80000000; 1990 e->pdr.regoffset = -4; 1991 } 1992 } 1993 1994 /* It would be reasonable that functions that have been compiled 1995 without debugging info have a btNil type for their return value, 1996 and functions that are void and are compiled with debugging info 1997 have btVoid. 1998 gcc and DEC f77 put out btNil types for both cases, so btNil is mapped 1999 to TYPE_CODE_VOID in parse_type to get the `compiled with debugging info' 2000 case right. 2001 The glevel field in cur_fdr could be used to determine the presence 2002 of debugging info, but GCC doesn't always pass the -g switch settings 2003 to the assembler and GAS doesn't set the glevel field from the -g switch 2004 settings. 2005 To work around these problems, the return value type of a TYPE_CODE_VOID 2006 function is adjusted accordingly if no debugging info was found in the 2007 compilation unit. */ 2008 2009 if (processing_gcc_compilation == 0 2010 && found_ecoff_debugging_info == 0 2011 && TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (s))) == TYPE_CODE_VOID) 2012 SYMBOL_TYPE (s) = nodebug_func_symbol_type; 2013 } 2014 2015 /* Relocate the extra function info pointed to by the symbol table. */ 2016 2017 void 2018 ecoff_relocate_efi (struct symbol *sym, CORE_ADDR delta) 2019 { 2020 struct mips_extra_func_info *e; 2021 2022 e = (struct mips_extra_func_info *) SYMBOL_VALUE (sym); 2023 2024 e->pdr.adr += delta; 2025 } 2026 2027 /* Parse the external symbol ES. Just call parse_symbol() after 2028 making sure we know where the aux are for it. 2029 BIGEND says whether aux entries are big-endian or little-endian. 2030 2031 This routine clobbers top_stack->cur_block and ->cur_st. */ 2032 2033 static void parse_external (EXTR *, int, struct section_offsets *, 2034 struct objfile *); 2035 2036 static void 2037 parse_external (EXTR *es, int bigend, struct section_offsets *section_offsets, 2038 struct objfile *objfile) 2039 { 2040 union aux_ext *ax; 2041 2042 if (es->ifd != ifdNil) 2043 { 2044 cur_fd = es->ifd; 2045 cur_fdr = debug_info->fdr + cur_fd; 2046 ax = debug_info->external_aux + cur_fdr->iauxBase; 2047 } 2048 else 2049 { 2050 cur_fdr = debug_info->fdr; 2051 ax = 0; 2052 } 2053 2054 /* Reading .o files */ 2055 if (SC_IS_UNDEF (es->asym.sc) || es->asym.sc == scNil) 2056 { 2057 char *what; 2058 switch (es->asym.st) 2059 { 2060 case stNil: 2061 /* These are generated for static symbols in .o files, 2062 ignore them. */ 2063 return; 2064 case stStaticProc: 2065 case stProc: 2066 what = "procedure"; 2067 n_undef_procs++; 2068 break; 2069 case stGlobal: 2070 what = "variable"; 2071 n_undef_vars++; 2072 break; 2073 case stLabel: 2074 what = "label"; 2075 n_undef_labels++; 2076 break; 2077 default: 2078 what = "symbol"; 2079 break; 2080 } 2081 n_undef_symbols++; 2082 /* FIXME: Turn this into a complaint? */ 2083 if (info_verbose) 2084 printf_filtered ("Warning: %s `%s' is undefined (in %s)\n", 2085 what, debug_info->ssext + es->asym.iss, 2086 fdr_name (cur_fdr)); 2087 return; 2088 } 2089 2090 switch (es->asym.st) 2091 { 2092 case stProc: 2093 case stStaticProc: 2094 /* There is no need to parse the external procedure symbols. 2095 If they are from objects compiled without -g, their index will 2096 be indexNil, and the symbol definition from the minimal symbol 2097 is preferrable (yielding a function returning int instead of int). 2098 If the index points to a local procedure symbol, the local 2099 symbol already provides the correct type. 2100 Note that the index of the external procedure symbol points 2101 to the local procedure symbol in the local symbol table, and 2102 _not_ to the auxiliary symbol info. */ 2103 break; 2104 case stGlobal: 2105 case stLabel: 2106 /* Global common symbols are resolved by the runtime loader, 2107 ignore them. */ 2108 if (SC_IS_COMMON (es->asym.sc)) 2109 break; 2110 2111 /* Note that the case of a symbol with indexNil must be handled 2112 anyways by parse_symbol(). */ 2113 parse_symbol (&es->asym, ax, (char *) NULL, bigend, section_offsets, objfile); 2114 break; 2115 default: 2116 break; 2117 } 2118 } 2119 2120 /* Parse the line number info for file descriptor FH into 2121 GDB's linetable LT. MIPS' encoding requires a little bit 2122 of magic to get things out. Note also that MIPS' line 2123 numbers can go back and forth, apparently we can live 2124 with that and do not need to reorder our linetables */ 2125 2126 static void parse_lines (FDR *, PDR *, struct linetable *, int, 2127 struct partial_symtab *, CORE_ADDR); 2128 2129 static void 2130 parse_lines (FDR *fh, PDR *pr, struct linetable *lt, int maxlines, 2131 struct partial_symtab *pst, CORE_ADDR lowest_pdr_addr) 2132 { 2133 unsigned char *base; 2134 int j, k; 2135 int delta, count, lineno = 0; 2136 2137 if (fh->cbLine == 0) 2138 return; 2139 2140 /* Scan by procedure descriptors */ 2141 k = 0; 2142 for (j = 0; j < fh->cpd; j++, pr++) 2143 { 2144 CORE_ADDR l; 2145 CORE_ADDR adr; 2146 unsigned char *halt; 2147 2148 /* No code for this one */ 2149 if (pr->iline == ilineNil || 2150 pr->lnLow == -1 || pr->lnHigh == -1) 2151 continue; 2152 2153 /* Determine start and end address of compressed line bytes for 2154 this procedure. */ 2155 base = debug_info->line + fh->cbLineOffset; 2156 if (j != (fh->cpd - 1)) 2157 halt = base + pr[1].cbLineOffset; 2158 else 2159 halt = base + fh->cbLine; 2160 base += pr->cbLineOffset; 2161 2162 adr = pst->textlow + pr->adr - lowest_pdr_addr; 2163 2164 l = adr >> 2; /* in words */ 2165 for (lineno = pr->lnLow; base < halt;) 2166 { 2167 count = *base & 0x0f; 2168 delta = *base++ >> 4; 2169 if (delta >= 8) 2170 delta -= 16; 2171 if (delta == -8) 2172 { 2173 delta = (base[0] << 8) | base[1]; 2174 if (delta >= 0x8000) 2175 delta -= 0x10000; 2176 base += 2; 2177 } 2178 lineno += delta; /* first delta is 0 */ 2179 2180 /* Complain if the line table overflows. Could happen 2181 with corrupt binaries. */ 2182 if (lt->nitems >= maxlines) 2183 { 2184 complaint (&symfile_complaints, 2185 "guessed size of linetable for %s incorrectly", 2186 fdr_name (fh)); 2187 break; 2188 } 2189 k = add_line (lt, lineno, l, k); 2190 l += count + 1; 2191 } 2192 } 2193 } 2194 2195 static void 2196 function_outside_compilation_unit_complaint (const char *arg1) 2197 { 2198 complaint (&symfile_complaints, 2199 "function `%s' appears to be defined outside of all compilation units", 2200 arg1); 2201 } 2202 2203 /* Master parsing procedure for first-pass reading of file symbols 2204 into a partial_symtab. */ 2205 2206 static void 2207 parse_partial_symbols (struct objfile *objfile) 2208 { 2209 const bfd_size_type external_sym_size = debug_swap->external_sym_size; 2210 const bfd_size_type external_rfd_size = debug_swap->external_rfd_size; 2211 const bfd_size_type external_ext_size = debug_swap->external_ext_size; 2212 void (*const swap_ext_in) (bfd *, void *, EXTR *) = debug_swap->swap_ext_in; 2213 void (*const swap_sym_in) (bfd *, void *, SYMR *) = debug_swap->swap_sym_in; 2214 void (*const swap_rfd_in) (bfd *, void *, RFDT *) = debug_swap->swap_rfd_in; 2215 int f_idx, s_idx; 2216 HDRR *hdr = &debug_info->symbolic_header; 2217 /* Running pointers */ 2218 FDR *fh; 2219 char *ext_out; 2220 char *ext_out_end; 2221 EXTR *ext_block; 2222 EXTR *ext_in; 2223 EXTR *ext_in_end; 2224 SYMR sh; 2225 struct partial_symtab *pst; 2226 int textlow_not_set = 1; 2227 int past_first_source_file = 0; 2228 2229 /* List of current psymtab's include files */ 2230 char **psymtab_include_list; 2231 int includes_allocated; 2232 int includes_used; 2233 EXTR *extern_tab; 2234 struct pst_map *fdr_to_pst; 2235 /* Index within current psymtab dependency list */ 2236 struct partial_symtab **dependency_list; 2237 int dependencies_used, dependencies_allocated; 2238 struct cleanup *old_chain; 2239 char *name; 2240 enum language prev_language; 2241 asection *text_sect; 2242 int relocatable = 0; 2243 2244 /* Irix 5.2 shared libraries have a fh->adr field of zero, but 2245 the shared libraries are prelinked at a high memory address. 2246 We have to adjust the start address of the object file for this case, 2247 by setting it to the start address of the first procedure in the file. 2248 But we should do no adjustments if we are debugging a .o file, where 2249 the text section (and fh->adr) really starts at zero. */ 2250 text_sect = bfd_get_section_by_name (cur_bfd, ".text"); 2251 if (text_sect != NULL 2252 && (bfd_get_section_flags (cur_bfd, text_sect) & SEC_RELOC)) 2253 relocatable = 1; 2254 2255 extern_tab = (EXTR *) obstack_alloc (&objfile->objfile_obstack, 2256 sizeof (EXTR) * hdr->iextMax); 2257 2258 includes_allocated = 30; 2259 includes_used = 0; 2260 psymtab_include_list = (char **) alloca (includes_allocated * 2261 sizeof (char *)); 2262 next_symbol_text_func = mdebug_next_symbol_text; 2263 2264 dependencies_allocated = 30; 2265 dependencies_used = 0; 2266 dependency_list = 2267 (struct partial_symtab **) alloca (dependencies_allocated * 2268 sizeof (struct partial_symtab *)); 2269 2270 last_source_file = NULL; 2271 2272 /* 2273 * Big plan: 2274 * 2275 * Only parse the Local and External symbols, and the Relative FDR. 2276 * Fixup enough of the loader symtab to be able to use it. 2277 * Allocate space only for the file's portions we need to 2278 * look at. (XXX) 2279 */ 2280 2281 max_gdbinfo = 0; 2282 max_glevel = MIN_GLEVEL; 2283 2284 /* Allocate the map FDR -> PST. 2285 Minor hack: -O3 images might claim some global data belongs 2286 to FDR -1. We`ll go along with that */ 2287 fdr_to_pst = (struct pst_map *) xzalloc ((hdr->ifdMax + 1) * sizeof *fdr_to_pst); 2288 old_chain = make_cleanup (xfree, fdr_to_pst); 2289 fdr_to_pst++; 2290 { 2291 struct partial_symtab *pst = new_psymtab ("", objfile); 2292 fdr_to_pst[-1].pst = pst; 2293 FDR_IDX (pst) = -1; 2294 } 2295 2296 /* Allocate the global pending list. */ 2297 pending_list = 2298 ((struct mdebug_pending **) 2299 obstack_alloc (&objfile->objfile_obstack, 2300 hdr->ifdMax * sizeof (struct mdebug_pending *))); 2301 memset (pending_list, 0, 2302 hdr->ifdMax * sizeof (struct mdebug_pending *)); 2303 2304 /* Pass 0 over external syms: swap them in. */ 2305 ext_block = (EXTR *) xmalloc (hdr->iextMax * sizeof (EXTR)); 2306 make_cleanup (xfree, ext_block); 2307 2308 ext_out = (char *) debug_info->external_ext; 2309 ext_out_end = ext_out + hdr->iextMax * external_ext_size; 2310 ext_in = ext_block; 2311 for (; ext_out < ext_out_end; ext_out += external_ext_size, ext_in++) 2312 (*swap_ext_in) (cur_bfd, ext_out, ext_in); 2313 2314 /* Pass 1 over external syms: Presize and partition the list */ 2315 ext_in = ext_block; 2316 ext_in_end = ext_in + hdr->iextMax; 2317 for (; ext_in < ext_in_end; ext_in++) 2318 { 2319 /* See calls to complain below. */ 2320 if (ext_in->ifd >= -1 2321 && ext_in->ifd < hdr->ifdMax 2322 && ext_in->asym.iss >= 0 2323 && ext_in->asym.iss < hdr->issExtMax) 2324 fdr_to_pst[ext_in->ifd].n_globals++; 2325 } 2326 2327 /* Pass 1.5 over files: partition out global symbol space */ 2328 s_idx = 0; 2329 for (f_idx = -1; f_idx < hdr->ifdMax; f_idx++) 2330 { 2331 fdr_to_pst[f_idx].globals_offset = s_idx; 2332 s_idx += fdr_to_pst[f_idx].n_globals; 2333 fdr_to_pst[f_idx].n_globals = 0; 2334 } 2335 2336 /* ECOFF in ELF: 2337 2338 For ECOFF in ELF, we skip the creation of the minimal symbols. 2339 The ECOFF symbols should be a subset of the Elf symbols, and the 2340 section information of the elf symbols will be more accurate. 2341 FIXME! What about Irix 5's native linker? 2342 2343 By default, Elf sections which don't exist in ECOFF 2344 get put in ECOFF's absolute section by the gnu linker. 2345 Since absolute sections don't get relocated, we 2346 end up calculating an address different from that of 2347 the symbol's minimal symbol (created earlier from the 2348 Elf symtab). 2349 2350 To fix this, either : 2351 1) don't create the duplicate symbol 2352 (assumes ECOFF symtab is a subset of the ELF symtab; 2353 assumes no side-effects result from ignoring ECOFF symbol) 2354 2) create it, only if lookup for existing symbol in ELF's minimal 2355 symbols fails 2356 (inefficient; 2357 assumes no side-effects result from ignoring ECOFF symbol) 2358 3) create it, but lookup ELF's minimal symbol and use it's section 2359 during relocation, then modify "uniqify" phase to merge and 2360 eliminate the duplicate symbol 2361 (highly inefficient) 2362 2363 I've implemented #1 here... 2364 Skip the creation of the minimal symbols based on the ECOFF 2365 symbol table. */ 2366 2367 /* Pass 2 over external syms: fill in external symbols */ 2368 ext_in = ext_block; 2369 ext_in_end = ext_in + hdr->iextMax; 2370 for (; ext_in < ext_in_end; ext_in++) 2371 { 2372 enum minimal_symbol_type ms_type = mst_text; 2373 CORE_ADDR svalue = ext_in->asym.value; 2374 2375 /* The Irix 5 native tools seem to sometimes generate bogus 2376 external symbols. */ 2377 if (ext_in->ifd < -1 || ext_in->ifd >= hdr->ifdMax) 2378 { 2379 complaint (&symfile_complaints, 2380 "bad ifd for external symbol: %d (max %ld)", ext_in->ifd, 2381 hdr->ifdMax); 2382 continue; 2383 } 2384 if (ext_in->asym.iss < 0 || ext_in->asym.iss >= hdr->issExtMax) 2385 { 2386 complaint (&symfile_complaints, 2387 "bad iss for external symbol: %ld (max %ld)", 2388 ext_in->asym.iss, hdr->issExtMax); 2389 continue; 2390 } 2391 2392 extern_tab[fdr_to_pst[ext_in->ifd].globals_offset 2393 + fdr_to_pst[ext_in->ifd].n_globals++] = *ext_in; 2394 2395 2396 if (SC_IS_UNDEF (ext_in->asym.sc) || ext_in->asym.sc == scNil) 2397 continue; 2398 2399 2400 /* Pass 3 over files, over local syms: fill in static symbols */ 2401 name = debug_info->ssext + ext_in->asym.iss; 2402 2403 /* Process ECOFF Symbol Types and Storage Classes */ 2404 switch (ext_in->asym.st) 2405 { 2406 case stProc: 2407 /* Beginnning of Procedure */ 2408 svalue += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); 2409 break; 2410 case stStaticProc: 2411 /* Load time only static procs */ 2412 ms_type = mst_file_text; 2413 svalue += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); 2414 break; 2415 case stGlobal: 2416 /* External symbol */ 2417 if (SC_IS_COMMON (ext_in->asym.sc)) 2418 { 2419 /* The value of a common symbol is its size, not its address. 2420 Ignore it. */ 2421 continue; 2422 } 2423 else if (SC_IS_DATA (ext_in->asym.sc)) 2424 { 2425 ms_type = mst_data; 2426 svalue += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile)); 2427 } 2428 else if (SC_IS_BSS (ext_in->asym.sc)) 2429 { 2430 ms_type = mst_bss; 2431 svalue += ANOFFSET (objfile->section_offsets, SECT_OFF_BSS (objfile)); 2432 } 2433 else if (SC_IS_SBSS (ext_in->asym.sc)) 2434 { 2435 ms_type = mst_bss; 2436 svalue += ANOFFSET (objfile->section_offsets, 2437 get_section_index (objfile, ".sbss")); 2438 } 2439 else 2440 ms_type = mst_abs; 2441 break; 2442 case stLabel: 2443 /* Label */ 2444 2445 /* On certain platforms, some extra label symbols can be 2446 generated by the linker. One possible usage for this kind 2447 of symbols is to represent the address of the begining of a 2448 given section. For instance, on Tru64 5.1, the address of 2449 the _ftext label is the start address of the .text section. 2450 2451 The storage class of these symbols is usually directly 2452 related to the section to which the symbol refers. For 2453 instance, on Tru64 5.1, the storage class for the _fdata 2454 label is scData, refering to the .data section. 2455 2456 It is actually possible that the section associated to the 2457 storage class of the label does not exist. On True64 5.1 2458 for instance, the libm.so shared library does not contain 2459 any .data section, although it contains a _fpdata label 2460 which storage class is scData... Since these symbols are 2461 usually useless for the debugger user anyway, we just 2462 discard these symbols. 2463 */ 2464 2465 if (SC_IS_TEXT (ext_in->asym.sc)) 2466 { 2467 if (objfile->sect_index_text == -1) 2468 continue; 2469 2470 ms_type = mst_file_text; 2471 svalue += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); 2472 } 2473 else if (SC_IS_DATA (ext_in->asym.sc)) 2474 { 2475 if (objfile->sect_index_data == -1) 2476 continue; 2477 2478 ms_type = mst_file_data; 2479 svalue += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile)); 2480 } 2481 else if (SC_IS_BSS (ext_in->asym.sc)) 2482 { 2483 if (objfile->sect_index_bss == -1) 2484 continue; 2485 2486 ms_type = mst_file_bss; 2487 svalue += ANOFFSET (objfile->section_offsets, SECT_OFF_BSS (objfile)); 2488 } 2489 else if (SC_IS_SBSS (ext_in->asym.sc)) 2490 { 2491 const int sbss_sect_index = get_section_index (objfile, ".sbss"); 2492 2493 if (sbss_sect_index == -1) 2494 continue; 2495 2496 ms_type = mst_file_bss; 2497 svalue += ANOFFSET (objfile->section_offsets, sbss_sect_index); 2498 } 2499 else 2500 ms_type = mst_abs; 2501 break; 2502 case stLocal: 2503 case stNil: 2504 /* The alpha has the section start addresses in stLocal symbols 2505 whose name starts with a `.'. Skip those but complain for all 2506 other stLocal symbols. 2507 Irix6 puts the section start addresses in stNil symbols, skip 2508 those too. */ 2509 if (name[0] == '.') 2510 continue; 2511 /* Fall through. */ 2512 default: 2513 ms_type = mst_unknown; 2514 unknown_ext_complaint (name); 2515 } 2516 if (!ECOFF_IN_ELF (cur_bfd)) 2517 prim_record_minimal_symbol (name, svalue, ms_type, objfile); 2518 } 2519 2520 /* Pass 3 over files, over local syms: fill in static symbols */ 2521 for (f_idx = 0; f_idx < hdr->ifdMax; f_idx++) 2522 { 2523 struct partial_symtab *save_pst; 2524 EXTR *ext_ptr; 2525 CORE_ADDR textlow; 2526 2527 cur_fdr = fh = debug_info->fdr + f_idx; 2528 2529 if (fh->csym == 0) 2530 { 2531 fdr_to_pst[f_idx].pst = NULL; 2532 continue; 2533 } 2534 2535 /* Determine the start address for this object file from the 2536 file header and relocate it, except for Irix 5.2 zero fh->adr. */ 2537 if (fh->cpd) 2538 { 2539 textlow = fh->adr; 2540 if (relocatable || textlow != 0) 2541 textlow += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); 2542 } 2543 else 2544 textlow = 0; 2545 pst = start_psymtab_common (objfile, objfile->section_offsets, 2546 fdr_name (fh), 2547 textlow, 2548 objfile->global_psymbols.next, 2549 objfile->static_psymbols.next); 2550 pst->read_symtab_private = ((char *) 2551 obstack_alloc (&objfile->objfile_obstack, 2552 sizeof (struct symloc))); 2553 memset (pst->read_symtab_private, 0, sizeof (struct symloc)); 2554 2555 save_pst = pst; 2556 FDR_IDX (pst) = f_idx; 2557 CUR_BFD (pst) = cur_bfd; 2558 DEBUG_SWAP (pst) = debug_swap; 2559 DEBUG_INFO (pst) = debug_info; 2560 PENDING_LIST (pst) = pending_list; 2561 2562 /* The way to turn this into a symtab is to call... */ 2563 pst->read_symtab = mdebug_psymtab_to_symtab; 2564 2565 /* Set up language for the pst. 2566 The language from the FDR is used if it is unambigious (e.g. cfront 2567 with native cc and g++ will set the language to C). 2568 Otherwise we have to deduce the language from the filename. 2569 Native ecoff has every header file in a separate FDR, so 2570 deduce_language_from_filename will return language_unknown for 2571 a header file, which is not what we want. 2572 But the FDRs for the header files are after the FDR for the source 2573 file, so we can assign the language of the source file to the 2574 following header files. Then we save the language in the private 2575 pst data so that we can reuse it when building symtabs. */ 2576 prev_language = psymtab_language; 2577 2578 switch (fh->lang) 2579 { 2580 case langCplusplusV2: 2581 psymtab_language = language_cplus; 2582 break; 2583 default: 2584 psymtab_language = deduce_language_from_filename (fdr_name (fh)); 2585 break; 2586 } 2587 if (psymtab_language == language_unknown) 2588 psymtab_language = prev_language; 2589 PST_PRIVATE (pst)->pst_language = psymtab_language; 2590 2591 pst->texthigh = pst->textlow; 2592 2593 /* For stabs-in-ecoff files, the second symbol must be @stab. 2594 This symbol is emitted by mips-tfile to signal that the 2595 current object file uses encapsulated stabs instead of mips 2596 ecoff for local symbols. (It is the second symbol because 2597 the first symbol is the stFile used to signal the start of a 2598 file). */ 2599 processing_gcc_compilation = 0; 2600 if (fh->csym >= 2) 2601 { 2602 (*swap_sym_in) (cur_bfd, 2603 ((char *) debug_info->external_sym 2604 + (fh->isymBase + 1) * external_sym_size), 2605 &sh); 2606 if (strcmp (debug_info->ss + fh->issBase + sh.iss, 2607 stabs_symbol) == 0) 2608 processing_gcc_compilation = 2; 2609 } 2610 2611 if (processing_gcc_compilation != 0) 2612 { 2613 for (cur_sdx = 2; cur_sdx < fh->csym; cur_sdx++) 2614 { 2615 int type_code; 2616 char *namestring; 2617 2618 (*swap_sym_in) (cur_bfd, 2619 (((char *) debug_info->external_sym) 2620 + (fh->isymBase + cur_sdx) * external_sym_size), 2621 &sh); 2622 type_code = ECOFF_UNMARK_STAB (sh.index); 2623 if (!ECOFF_IS_STAB (&sh)) 2624 { 2625 if (sh.st == stProc || sh.st == stStaticProc) 2626 { 2627 CORE_ADDR procaddr; 2628 long isym; 2629 2630 sh.value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); 2631 if (sh.st == stStaticProc) 2632 { 2633 namestring = debug_info->ss + fh->issBase + sh.iss; 2634 prim_record_minimal_symbol_and_info (namestring, 2635 sh.value, 2636 mst_file_text, 2637 NULL, 2638 SECT_OFF_TEXT (objfile), 2639 NULL, 2640 objfile); 2641 } 2642 procaddr = sh.value; 2643 2644 isym = AUX_GET_ISYM (fh->fBigendian, 2645 (debug_info->external_aux 2646 + fh->iauxBase 2647 + sh.index)); 2648 (*swap_sym_in) (cur_bfd, 2649 ((char *) debug_info->external_sym 2650 + ((fh->isymBase + isym - 1) 2651 * external_sym_size)), 2652 &sh); 2653 if (sh.st == stEnd) 2654 { 2655 CORE_ADDR high = procaddr + sh.value; 2656 2657 /* Kludge for Irix 5.2 zero fh->adr. */ 2658 if (!relocatable 2659 && (pst->textlow == 0 || procaddr < pst->textlow)) 2660 pst->textlow = procaddr; 2661 if (high > pst->texthigh) 2662 pst->texthigh = high; 2663 } 2664 } 2665 else if (sh.st == stStatic) 2666 { 2667 switch (sh.sc) 2668 { 2669 case scUndefined: 2670 case scSUndefined: 2671 case scNil: 2672 case scAbs: 2673 break; 2674 2675 case scData: 2676 case scSData: 2677 case scRData: 2678 case scPData: 2679 case scXData: 2680 namestring = debug_info->ss + fh->issBase + sh.iss; 2681 sh.value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile)); 2682 prim_record_minimal_symbol_and_info (namestring, 2683 sh.value, 2684 mst_file_data, 2685 NULL, 2686 SECT_OFF_DATA (objfile), 2687 NULL, 2688 objfile); 2689 break; 2690 2691 default: 2692 /* FIXME! Shouldn't this use cases for bss, 2693 then have the default be abs? */ 2694 namestring = debug_info->ss + fh->issBase + sh.iss; 2695 sh.value += ANOFFSET (objfile->section_offsets, SECT_OFF_BSS (objfile)); 2696 prim_record_minimal_symbol_and_info (namestring, 2697 sh.value, 2698 mst_file_bss, 2699 NULL, 2700 SECT_OFF_BSS (objfile), 2701 NULL, 2702 objfile); 2703 break; 2704 } 2705 } 2706 continue; 2707 } 2708 /* Handle stabs continuation */ 2709 { 2710 char *stabstring = debug_info->ss + fh->issBase + sh.iss; 2711 int len = strlen (stabstring); 2712 while (stabstring[len - 1] == '\\') 2713 { 2714 SYMR sh2; 2715 char *stabstring1 = stabstring; 2716 char *stabstring2; 2717 int len2; 2718 2719 /* Ignore continuation char from 1st string */ 2720 len--; 2721 2722 /* Read next stabstring */ 2723 cur_sdx++; 2724 (*swap_sym_in) (cur_bfd, 2725 (((char *) debug_info->external_sym) 2726 + (fh->isymBase + cur_sdx) 2727 * external_sym_size), 2728 &sh2); 2729 stabstring2 = debug_info->ss + fh->issBase + sh2.iss; 2730 len2 = strlen (stabstring2); 2731 2732 /* Concatinate stabstring2 with stabstring1 */ 2733 if (stabstring 2734 && stabstring != debug_info->ss + fh->issBase + sh.iss) 2735 stabstring = xrealloc (stabstring, len + len2 + 1); 2736 else 2737 { 2738 stabstring = xmalloc (len + len2 + 1); 2739 strcpy (stabstring, stabstring1); 2740 } 2741 strcpy (stabstring + len, stabstring2); 2742 len += len2; 2743 } 2744 2745 switch (type_code) 2746 { 2747 char *p; 2748 /* 2749 * Standard, external, non-debugger, symbols 2750 */ 2751 2752 case N_TEXT | N_EXT: 2753 case N_NBTEXT | N_EXT: 2754 sh.value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); 2755 goto record_it; 2756 2757 case N_DATA | N_EXT: 2758 case N_NBDATA | N_EXT: 2759 sh.value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile)); 2760 goto record_it; 2761 2762 case N_BSS: 2763 case N_BSS | N_EXT: 2764 case N_NBBSS | N_EXT: 2765 case N_SETV | N_EXT: /* FIXME, is this in BSS? */ 2766 sh.value += ANOFFSET (objfile->section_offsets, SECT_OFF_BSS (objfile)); 2767 goto record_it; 2768 2769 case N_ABS | N_EXT: 2770 record_it: 2771 continue; 2772 2773 /* Standard, local, non-debugger, symbols */ 2774 2775 case N_NBTEXT: 2776 2777 /* We need to be able to deal with both N_FN or N_TEXT, 2778 because we have no way of knowing whether the sys-supplied ld 2779 or GNU ld was used to make the executable. Sequents throw 2780 in another wrinkle -- they renumbered N_FN. */ 2781 2782 case N_FN: 2783 case N_FN_SEQ: 2784 case N_TEXT: 2785 continue; 2786 2787 case N_DATA: 2788 sh.value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile)); 2789 goto record_it; 2790 2791 case N_UNDF | N_EXT: 2792 continue; /* Just undefined, not COMMON */ 2793 2794 case N_UNDF: 2795 continue; 2796 2797 /* Lots of symbol types we can just ignore. */ 2798 2799 case N_ABS: 2800 case N_NBDATA: 2801 case N_NBBSS: 2802 continue; 2803 2804 /* Keep going . . . */ 2805 2806 /* 2807 * Special symbol types for GNU 2808 */ 2809 case N_INDR: 2810 case N_INDR | N_EXT: 2811 case N_SETA: 2812 case N_SETA | N_EXT: 2813 case N_SETT: 2814 case N_SETT | N_EXT: 2815 case N_SETD: 2816 case N_SETD | N_EXT: 2817 case N_SETB: 2818 case N_SETB | N_EXT: 2819 case N_SETV: 2820 continue; 2821 2822 /* 2823 * Debugger symbols 2824 */ 2825 2826 case N_SO: 2827 { 2828 CORE_ADDR valu; 2829 static int prev_so_symnum = -10; 2830 static int first_so_symnum; 2831 char *p; 2832 int prev_textlow_not_set; 2833 2834 valu = sh.value + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); 2835 2836 prev_textlow_not_set = textlow_not_set; 2837 2838 #ifdef SOFUN_ADDRESS_MAYBE_MISSING 2839 /* A zero value is probably an indication for the SunPRO 3.0 2840 compiler. end_psymtab explicitly tests for zero, so 2841 don't relocate it. */ 2842 2843 if (sh.value == 0) 2844 { 2845 textlow_not_set = 1; 2846 valu = 0; 2847 } 2848 else 2849 textlow_not_set = 0; 2850 #else 2851 textlow_not_set = 0; 2852 #endif 2853 past_first_source_file = 1; 2854 2855 if (prev_so_symnum != symnum - 1) 2856 { /* Here if prev stab wasn't N_SO */ 2857 first_so_symnum = symnum; 2858 2859 if (pst) 2860 { 2861 pst = (struct partial_symtab *) 0; 2862 includes_used = 0; 2863 dependencies_used = 0; 2864 } 2865 } 2866 2867 prev_so_symnum = symnum; 2868 2869 /* End the current partial symtab and start a new one */ 2870 2871 /* SET_NAMESTRING ();*/ 2872 namestring = stabstring; 2873 2874 /* Null name means end of .o file. Don't start a new one. */ 2875 if (*namestring == '\000') 2876 continue; 2877 2878 /* Some compilers (including gcc) emit a pair of initial N_SOs. 2879 The first one is a directory name; the second the file name. 2880 If pst exists, is empty, and has a filename ending in '/', 2881 we assume the previous N_SO was a directory name. */ 2882 2883 p = strrchr (namestring, '/'); 2884 if (p && *(p + 1) == '\000') 2885 continue; /* Simply ignore directory name SOs */ 2886 2887 /* Some other compilers (C++ ones in particular) emit useless 2888 SOs for non-existant .c files. We ignore all subsequent SOs that 2889 immediately follow the first. */ 2890 2891 if (!pst) 2892 pst = save_pst; 2893 continue; 2894 } 2895 2896 case N_BINCL: 2897 continue; 2898 2899 case N_SOL: 2900 { 2901 enum language tmp_language; 2902 /* Mark down an include file in the current psymtab */ 2903 2904 /* SET_NAMESTRING ();*/ 2905 namestring = stabstring; 2906 2907 tmp_language = deduce_language_from_filename (namestring); 2908 2909 /* Only change the psymtab's language if we've learned 2910 something useful (eg. tmp_language is not language_unknown). 2911 In addition, to match what start_subfile does, never change 2912 from C++ to C. */ 2913 if (tmp_language != language_unknown 2914 && (tmp_language != language_c 2915 || psymtab_language != language_cplus)) 2916 psymtab_language = tmp_language; 2917 2918 /* In C++, one may expect the same filename to come round many 2919 times, when code is coming alternately from the main file 2920 and from inline functions in other files. So I check to see 2921 if this is a file we've seen before -- either the main 2922 source file, or a previously included file. 2923 2924 This seems to be a lot of time to be spending on N_SOL, but 2925 things like "break c-exp.y:435" need to work (I 2926 suppose the psymtab_include_list could be hashed or put 2927 in a binary tree, if profiling shows this is a major hog). */ 2928 if (pst && strcmp (namestring, pst->filename) == 0) 2929 continue; 2930 { 2931 int i; 2932 for (i = 0; i < includes_used; i++) 2933 if (strcmp (namestring, 2934 psymtab_include_list[i]) == 0) 2935 { 2936 i = -1; 2937 break; 2938 } 2939 if (i == -1) 2940 continue; 2941 } 2942 2943 psymtab_include_list[includes_used++] = namestring; 2944 if (includes_used >= includes_allocated) 2945 { 2946 char **orig = psymtab_include_list; 2947 2948 psymtab_include_list = (char **) 2949 alloca ((includes_allocated *= 2) * 2950 sizeof (char *)); 2951 memcpy (psymtab_include_list, orig, 2952 includes_used * sizeof (char *)); 2953 } 2954 continue; 2955 } 2956 case N_LSYM: /* Typedef or automatic variable. */ 2957 case N_STSYM: /* Data seg var -- static */ 2958 case N_LCSYM: /* BSS " */ 2959 case N_ROSYM: /* Read-only data seg var -- static. */ 2960 case N_NBSTS: /* Gould nobase. */ 2961 case N_NBLCS: /* symbols. */ 2962 case N_FUN: 2963 case N_GSYM: /* Global (extern) variable; can be 2964 data or bss (sigh FIXME). */ 2965 2966 /* Following may probably be ignored; I'll leave them here 2967 for now (until I do Pascal and Modula 2 extensions). */ 2968 2969 case N_PC: /* I may or may not need this; I 2970 suspect not. */ 2971 case N_M2C: /* I suspect that I can ignore this here. */ 2972 case N_SCOPE: /* Same. */ 2973 2974 /* SET_NAMESTRING ();*/ 2975 namestring = stabstring; 2976 p = (char *) strchr (namestring, ':'); 2977 if (!p) 2978 continue; /* Not a debugging symbol. */ 2979 2980 2981 2982 /* Main processing section for debugging symbols which 2983 the initial read through the symbol tables needs to worry 2984 about. If we reach this point, the symbol which we are 2985 considering is definitely one we are interested in. 2986 p must also contain the (valid) index into the namestring 2987 which indicates the debugging type symbol. */ 2988 2989 switch (p[1]) 2990 { 2991 case 'S': 2992 sh.value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile)); 2993 #ifdef STATIC_TRANSFORM_NAME 2994 namestring = STATIC_TRANSFORM_NAME (namestring); 2995 #endif 2996 add_psymbol_to_list (namestring, p - namestring, 2997 VAR_DOMAIN, LOC_STATIC, 2998 &objfile->static_psymbols, 2999 0, sh.value, 3000 psymtab_language, objfile); 3001 continue; 3002 case 'G': 3003 sh.value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile)); 3004 /* The addresses in these entries are reported to be 3005 wrong. See the code that reads 'G's for symtabs. */ 3006 add_psymbol_to_list (namestring, p - namestring, 3007 VAR_DOMAIN, LOC_STATIC, 3008 &objfile->global_psymbols, 3009 0, sh.value, 3010 psymtab_language, objfile); 3011 continue; 3012 3013 case 'T': 3014 /* When a 'T' entry is defining an anonymous enum, it 3015 may have a name which is the empty string, or a 3016 single space. Since they're not really defining a 3017 symbol, those shouldn't go in the partial symbol 3018 table. We do pick up the elements of such enums at 3019 'check_enum:', below. */ 3020 if (p >= namestring + 2 3021 || (p == namestring + 1 3022 && namestring[0] != ' ')) 3023 { 3024 add_psymbol_to_list (namestring, p - namestring, 3025 STRUCT_DOMAIN, LOC_TYPEDEF, 3026 &objfile->static_psymbols, 3027 sh.value, 0, 3028 psymtab_language, objfile); 3029 if (p[2] == 't') 3030 { 3031 /* Also a typedef with the same name. */ 3032 add_psymbol_to_list (namestring, p - namestring, 3033 VAR_DOMAIN, LOC_TYPEDEF, 3034 &objfile->static_psymbols, 3035 sh.value, 0, 3036 psymtab_language, objfile); 3037 p += 1; 3038 } 3039 } 3040 goto check_enum; 3041 case 't': 3042 if (p != namestring) /* a name is there, not just :T... */ 3043 { 3044 add_psymbol_to_list (namestring, p - namestring, 3045 VAR_DOMAIN, LOC_TYPEDEF, 3046 &objfile->static_psymbols, 3047 sh.value, 0, 3048 psymtab_language, objfile); 3049 } 3050 check_enum: 3051 /* If this is an enumerated type, we need to 3052 add all the enum constants to the partial symbol 3053 table. This does not cover enums without names, e.g. 3054 "enum {a, b} c;" in C, but fortunately those are 3055 rare. There is no way for GDB to find those from the 3056 enum type without spending too much time on it. Thus 3057 to solve this problem, the compiler needs to put out the 3058 enum in a nameless type. GCC2 does this. */ 3059 3060 /* We are looking for something of the form 3061 <name> ":" ("t" | "T") [<number> "="] "e" 3062 {<constant> ":" <value> ","} ";". */ 3063 3064 /* Skip over the colon and the 't' or 'T'. */ 3065 p += 2; 3066 /* This type may be given a number. Also, numbers can come 3067 in pairs like (0,26). Skip over it. */ 3068 while ((*p >= '0' && *p <= '9') 3069 || *p == '(' || *p == ',' || *p == ')' 3070 || *p == '=') 3071 p++; 3072 3073 if (*p++ == 'e') 3074 { 3075 /* The aix4 compiler emits extra crud before the members. */ 3076 if (*p == '-') 3077 { 3078 /* Skip over the type (?). */ 3079 while (*p != ':') 3080 p++; 3081 3082 /* Skip over the colon. */ 3083 p++; 3084 } 3085 3086 /* We have found an enumerated type. */ 3087 /* According to comments in read_enum_type 3088 a comma could end it instead of a semicolon. 3089 I don't know where that happens. 3090 Accept either. */ 3091 while (*p && *p != ';' && *p != ',') 3092 { 3093 char *q; 3094 3095 /* Check for and handle cretinous dbx symbol name 3096 continuation! */ 3097 if (*p == '\\' || (*p == '?' && p[1] == '\0')) 3098 p = next_symbol_text (objfile); 3099 3100 /* Point to the character after the name 3101 of the enum constant. */ 3102 for (q = p; *q && *q != ':'; q++) 3103 ; 3104 /* Note that the value doesn't matter for 3105 enum constants in psymtabs, just in symtabs. */ 3106 add_psymbol_to_list (p, q - p, 3107 VAR_DOMAIN, LOC_CONST, 3108 &objfile->static_psymbols, 0, 3109 0, psymtab_language, objfile); 3110 /* Point past the name. */ 3111 p = q; 3112 /* Skip over the value. */ 3113 while (*p && *p != ',') 3114 p++; 3115 /* Advance past the comma. */ 3116 if (*p) 3117 p++; 3118 } 3119 } 3120 continue; 3121 case 'c': 3122 /* Constant, e.g. from "const" in Pascal. */ 3123 add_psymbol_to_list (namestring, p - namestring, 3124 VAR_DOMAIN, LOC_CONST, 3125 &objfile->static_psymbols, sh.value, 3126 0, psymtab_language, objfile); 3127 continue; 3128 3129 case 'f': 3130 if (! pst) 3131 { 3132 int name_len = p - namestring; 3133 char *name = xmalloc (name_len + 1); 3134 memcpy (name, namestring, name_len); 3135 name[name_len] = '\0'; 3136 function_outside_compilation_unit_complaint (name); 3137 xfree (name); 3138 } 3139 sh.value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); 3140 add_psymbol_to_list (namestring, p - namestring, 3141 VAR_DOMAIN, LOC_BLOCK, 3142 &objfile->static_psymbols, 3143 0, sh.value, 3144 psymtab_language, objfile); 3145 continue; 3146 3147 /* Global functions were ignored here, but now they 3148 are put into the global psymtab like one would expect. 3149 They're also in the minimal symbol table. */ 3150 case 'F': 3151 if (! pst) 3152 { 3153 int name_len = p - namestring; 3154 char *name = xmalloc (name_len + 1); 3155 memcpy (name, namestring, name_len); 3156 name[name_len] = '\0'; 3157 function_outside_compilation_unit_complaint (name); 3158 xfree (name); 3159 } 3160 sh.value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); 3161 add_psymbol_to_list (namestring, p - namestring, 3162 VAR_DOMAIN, LOC_BLOCK, 3163 &objfile->global_psymbols, 3164 0, sh.value, 3165 psymtab_language, objfile); 3166 continue; 3167 3168 /* Two things show up here (hopefully); static symbols of 3169 local scope (static used inside braces) or extensions 3170 of structure symbols. We can ignore both. */ 3171 case 'V': 3172 case '(': 3173 case '0': 3174 case '1': 3175 case '2': 3176 case '3': 3177 case '4': 3178 case '5': 3179 case '6': 3180 case '7': 3181 case '8': 3182 case '9': 3183 case '-': 3184 case '#': /* for symbol identification (used in live ranges) */ 3185 continue; 3186 3187 case ':': 3188 /* It is a C++ nested symbol. We don't need to record it 3189 (I don't think); if we try to look up foo::bar::baz, 3190 then symbols for the symtab containing foo should get 3191 read in, I think. */ 3192 /* Someone says sun cc puts out symbols like 3193 /foo/baz/maclib::/usr/local/bin/maclib, 3194 which would get here with a symbol type of ':'. */ 3195 continue; 3196 3197 default: 3198 /* Unexpected symbol descriptor. The second and subsequent stabs 3199 of a continued stab can show up here. The question is 3200 whether they ever can mimic a normal stab--it would be 3201 nice if not, since we certainly don't want to spend the 3202 time searching to the end of every string looking for 3203 a backslash. */ 3204 3205 complaint (&symfile_complaints, 3206 "unknown symbol descriptor `%c'", p[1]); 3207 3208 /* Ignore it; perhaps it is an extension that we don't 3209 know about. */ 3210 continue; 3211 } 3212 3213 case N_EXCL: 3214 continue; 3215 3216 case N_ENDM: 3217 #ifdef SOFUN_ADDRESS_MAYBE_MISSING 3218 /* Solaris 2 end of module, finish current partial 3219 symbol table. END_PSYMTAB will set 3220 pst->texthigh to the proper value, which is 3221 necessary if a module compiled without 3222 debugging info follows this module. */ 3223 if (pst) 3224 { 3225 pst = (struct partial_symtab *) 0; 3226 includes_used = 0; 3227 dependencies_used = 0; 3228 } 3229 #endif 3230 continue; 3231 3232 case N_RBRAC: 3233 if (sh.value > save_pst->texthigh) 3234 save_pst->texthigh = sh.value; 3235 continue; 3236 case N_EINCL: 3237 case N_DSLINE: 3238 case N_BSLINE: 3239 case N_SSYM: /* Claim: Structure or union element. 3240 Hopefully, I can ignore this. */ 3241 case N_ENTRY: /* Alternate entry point; can ignore. */ 3242 case N_MAIN: /* Can definitely ignore this. */ 3243 case N_CATCH: /* These are GNU C++ extensions */ 3244 case N_EHDECL: /* that can safely be ignored here. */ 3245 case N_LENG: 3246 case N_BCOMM: 3247 case N_ECOMM: 3248 case N_ECOML: 3249 case N_FNAME: 3250 case N_SLINE: 3251 case N_RSYM: 3252 case N_PSYM: 3253 case N_LBRAC: 3254 case N_NSYMS: /* Ultrix 4.0: symbol count */ 3255 case N_DEFD: /* GNU Modula-2 */ 3256 case N_ALIAS: /* SunPro F77: alias name, ignore for now. */ 3257 3258 case N_OBJ: /* useless types from Solaris */ 3259 case N_OPT: 3260 /* These symbols aren't interesting; don't worry about them */ 3261 3262 continue; 3263 3264 default: 3265 /* If we haven't found it yet, ignore it. It's probably some 3266 new type we don't know about yet. */ 3267 complaint (&symfile_complaints, "unknown symbol type %s", 3268 hex_string (type_code)); /*CUR_SYMBOL_TYPE*/ 3269 continue; 3270 } 3271 if (stabstring 3272 && stabstring != debug_info->ss + fh->issBase + sh.iss) 3273 xfree (stabstring); 3274 } 3275 /* end - Handle continuation */ 3276 } 3277 } 3278 else 3279 { 3280 for (cur_sdx = 0; cur_sdx < fh->csym;) 3281 { 3282 char *name; 3283 enum address_class class; 3284 3285 (*swap_sym_in) (cur_bfd, 3286 ((char *) debug_info->external_sym 3287 + ((fh->isymBase + cur_sdx) 3288 * external_sym_size)), 3289 &sh); 3290 3291 if (ECOFF_IS_STAB (&sh)) 3292 { 3293 cur_sdx++; 3294 continue; 3295 } 3296 3297 /* Non absolute static symbols go into the minimal table. */ 3298 if (SC_IS_UNDEF (sh.sc) || sh.sc == scNil 3299 || (sh.index == indexNil 3300 && (sh.st != stStatic || sh.sc == scAbs))) 3301 { 3302 /* FIXME, premature? */ 3303 cur_sdx++; 3304 continue; 3305 } 3306 3307 name = debug_info->ss + fh->issBase + sh.iss; 3308 3309 switch (sh.sc) 3310 { 3311 case scText: 3312 case scRConst: 3313 /* The value of a stEnd symbol is the displacement from the 3314 corresponding start symbol value, do not relocate it. */ 3315 if (sh.st != stEnd) 3316 sh.value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); 3317 break; 3318 case scData: 3319 case scSData: 3320 case scRData: 3321 case scPData: 3322 case scXData: 3323 sh.value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile)); 3324 break; 3325 case scBss: 3326 case scSBss: 3327 sh.value += ANOFFSET (objfile->section_offsets, SECT_OFF_BSS (objfile)); 3328 break; 3329 } 3330 3331 switch (sh.st) 3332 { 3333 CORE_ADDR high; 3334 CORE_ADDR procaddr; 3335 int new_sdx; 3336 3337 case stStaticProc: 3338 prim_record_minimal_symbol_and_info (name, sh.value, 3339 mst_file_text, NULL, 3340 SECT_OFF_TEXT (objfile), NULL, 3341 objfile); 3342 3343 /* FALLTHROUGH */ 3344 3345 case stProc: 3346 /* Ignore all parameter symbol records. */ 3347 if (sh.index >= hdr->iauxMax) 3348 { 3349 /* Should not happen, but does when cross-compiling 3350 with the MIPS compiler. FIXME -- pull later. */ 3351 index_complaint (name); 3352 new_sdx = cur_sdx + 1; /* Don't skip at all */ 3353 } 3354 else 3355 new_sdx = AUX_GET_ISYM (fh->fBigendian, 3356 (debug_info->external_aux 3357 + fh->iauxBase 3358 + sh.index)); 3359 3360 if (new_sdx <= cur_sdx) 3361 { 3362 /* This should not happen either... FIXME. */ 3363 complaint (&symfile_complaints, 3364 "bad proc end in aux found from symbol %s", 3365 name); 3366 new_sdx = cur_sdx + 1; /* Don't skip backward */ 3367 } 3368 3369 /* For stProc symbol records, we need to check the 3370 storage class as well, as only (stProc, scText) 3371 entries represent "real" procedures - See the 3372 Compaq document titled "Object File / Symbol Table 3373 Format Specification" for more information. If the 3374 storage class is not scText, we discard the whole 3375 block of symbol records for this stProc. */ 3376 if (sh.st == stProc && sh.sc != scText) 3377 goto skip; 3378 3379 /* Usually there is a local and a global stProc symbol 3380 for a function. This means that the function name 3381 has already been entered into the mimimal symbol table 3382 while processing the global symbols in pass 2 above. 3383 One notable exception is the PROGRAM name from 3384 f77 compiled executables, it is only put out as 3385 local stProc symbol, and a global MAIN__ stProc symbol 3386 points to it. It doesn't matter though, as gdb is 3387 still able to find the PROGRAM name via the partial 3388 symbol table, and the MAIN__ symbol via the minimal 3389 symbol table. */ 3390 if (sh.st == stProc) 3391 add_psymbol_to_list (name, strlen (name), 3392 VAR_DOMAIN, LOC_BLOCK, 3393 &objfile->global_psymbols, 3394 0, sh.value, psymtab_language, objfile); 3395 else 3396 add_psymbol_to_list (name, strlen (name), 3397 VAR_DOMAIN, LOC_BLOCK, 3398 &objfile->static_psymbols, 3399 0, sh.value, psymtab_language, objfile); 3400 3401 procaddr = sh.value; 3402 3403 cur_sdx = new_sdx; 3404 (*swap_sym_in) (cur_bfd, 3405 ((char *) debug_info->external_sym 3406 + ((fh->isymBase + cur_sdx - 1) 3407 * external_sym_size)), 3408 &sh); 3409 if (sh.st != stEnd) 3410 continue; 3411 3412 /* Kludge for Irix 5.2 zero fh->adr. */ 3413 if (!relocatable 3414 && (pst->textlow == 0 || procaddr < pst->textlow)) 3415 pst->textlow = procaddr; 3416 3417 high = procaddr + sh.value; 3418 if (high > pst->texthigh) 3419 pst->texthigh = high; 3420 continue; 3421 3422 case stStatic: /* Variable */ 3423 if (SC_IS_DATA (sh.sc)) 3424 prim_record_minimal_symbol_and_info (name, sh.value, 3425 mst_file_data, NULL, 3426 SECT_OFF_DATA (objfile), 3427 NULL, 3428 objfile); 3429 else 3430 prim_record_minimal_symbol_and_info (name, sh.value, 3431 mst_file_bss, NULL, 3432 SECT_OFF_BSS (objfile), 3433 NULL, 3434 objfile); 3435 class = LOC_STATIC; 3436 break; 3437 3438 case stIndirect: /* Irix5 forward declaration */ 3439 /* Skip forward declarations from Irix5 cc */ 3440 goto skip; 3441 3442 case stTypedef: /* Typedef */ 3443 /* Skip typedefs for forward declarations and opaque 3444 structs from alpha and mips cc. */ 3445 if (sh.iss == 0 || has_opaque_xref (fh, &sh)) 3446 goto skip; 3447 class = LOC_TYPEDEF; 3448 break; 3449 3450 case stConstant: /* Constant decl */ 3451 class = LOC_CONST; 3452 break; 3453 3454 case stUnion: 3455 case stStruct: 3456 case stEnum: 3457 case stBlock: /* { }, str, un, enum */ 3458 /* Do not create a partial symbol for cc unnamed aggregates 3459 and gcc empty aggregates. */ 3460 if ((sh.sc == scInfo 3461 || SC_IS_COMMON (sh.sc)) 3462 && sh.iss != 0 3463 && sh.index != cur_sdx + 2) 3464 { 3465 add_psymbol_to_list (name, strlen (name), 3466 STRUCT_DOMAIN, LOC_TYPEDEF, 3467 &objfile->static_psymbols, 3468 0, (CORE_ADDR) 0, 3469 psymtab_language, objfile); 3470 } 3471 handle_psymbol_enumerators (objfile, fh, sh.st, sh.value); 3472 3473 /* Skip over the block */ 3474 new_sdx = sh.index; 3475 if (new_sdx <= cur_sdx) 3476 { 3477 /* This happens with the Ultrix kernel. */ 3478 complaint (&symfile_complaints, 3479 "bad aux index at block symbol %s", name); 3480 new_sdx = cur_sdx + 1; /* Don't skip backward */ 3481 } 3482 cur_sdx = new_sdx; 3483 continue; 3484 3485 case stFile: /* File headers */ 3486 case stLabel: /* Labels */ 3487 case stEnd: /* Ends of files */ 3488 goto skip; 3489 3490 case stLocal: /* Local variables */ 3491 /* Normally these are skipped because we skip over 3492 all blocks we see. However, these can occur 3493 as visible symbols in a .h file that contains code. */ 3494 goto skip; 3495 3496 default: 3497 /* Both complaints are valid: one gives symbol name, 3498 the other the offending symbol type. */ 3499 complaint (&symfile_complaints, "unknown local symbol %s", 3500 name); 3501 complaint (&symfile_complaints, "with type %d", sh.st); 3502 cur_sdx++; 3503 continue; 3504 } 3505 /* Use this gdb symbol */ 3506 add_psymbol_to_list (name, strlen (name), 3507 VAR_DOMAIN, class, 3508 &objfile->static_psymbols, 3509 0, sh.value, psymtab_language, objfile); 3510 skip: 3511 cur_sdx++; /* Go to next file symbol */ 3512 } 3513 3514 /* Now do enter the external symbols. */ 3515 ext_ptr = &extern_tab[fdr_to_pst[f_idx].globals_offset]; 3516 cur_sdx = fdr_to_pst[f_idx].n_globals; 3517 PST_PRIVATE (save_pst)->extern_count = cur_sdx; 3518 PST_PRIVATE (save_pst)->extern_tab = ext_ptr; 3519 for (; --cur_sdx >= 0; ext_ptr++) 3520 { 3521 enum address_class class; 3522 SYMR *psh; 3523 char *name; 3524 CORE_ADDR svalue; 3525 3526 if (ext_ptr->ifd != f_idx) 3527 internal_error (__FILE__, __LINE__, "failed internal consistency check"); 3528 psh = &ext_ptr->asym; 3529 3530 /* Do not add undefined symbols to the partial symbol table. */ 3531 if (SC_IS_UNDEF (psh->sc) || psh->sc == scNil) 3532 continue; 3533 3534 svalue = psh->value; 3535 switch (psh->sc) 3536 { 3537 case scText: 3538 case scRConst: 3539 svalue += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); 3540 break; 3541 case scData: 3542 case scSData: 3543 case scRData: 3544 case scPData: 3545 case scXData: 3546 svalue += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile)); 3547 break; 3548 case scBss: 3549 case scSBss: 3550 svalue += ANOFFSET (objfile->section_offsets, SECT_OFF_BSS (objfile)); 3551 break; 3552 } 3553 3554 switch (psh->st) 3555 { 3556 case stNil: 3557 /* These are generated for static symbols in .o files, 3558 ignore them. */ 3559 continue; 3560 case stProc: 3561 case stStaticProc: 3562 /* External procedure symbols have been entered 3563 into the minimal symbol table in pass 2 above. 3564 Ignore them, as parse_external will ignore them too. */ 3565 continue; 3566 case stLabel: 3567 class = LOC_LABEL; 3568 break; 3569 default: 3570 unknown_ext_complaint (debug_info->ssext + psh->iss); 3571 /* Fall through, pretend it's global. */ 3572 case stGlobal: 3573 /* Global common symbols are resolved by the runtime loader, 3574 ignore them. */ 3575 if (SC_IS_COMMON (psh->sc)) 3576 continue; 3577 3578 class = LOC_STATIC; 3579 break; 3580 } 3581 name = debug_info->ssext + psh->iss; 3582 add_psymbol_to_list (name, strlen (name), 3583 VAR_DOMAIN, class, 3584 &objfile->global_psymbols, 3585 0, svalue, 3586 psymtab_language, objfile); 3587 } 3588 } 3589 3590 /* Link pst to FDR. end_psymtab returns NULL if the psymtab was 3591 empty and put on the free list. */ 3592 fdr_to_pst[f_idx].pst = end_psymtab (save_pst, 3593 psymtab_include_list, includes_used, 3594 -1, save_pst->texthigh, 3595 dependency_list, dependencies_used, textlow_not_set); 3596 includes_used = 0; 3597 dependencies_used = 0; 3598 3599 /* The objfile has its functions reordered if this partial symbol 3600 table overlaps any other partial symbol table. 3601 We cannot assume a reordered objfile if a partial symbol table 3602 is contained within another partial symbol table, as partial symbol 3603 tables for include files with executable code are contained 3604 within the partial symbol table for the including source file, 3605 and we do not want to flag the objfile reordered for these cases. 3606 3607 This strategy works well for Irix-5.2 shared libraries, but we 3608 might have to use a more elaborate (and slower) algorithm for 3609 other cases. */ 3610 save_pst = fdr_to_pst[f_idx].pst; 3611 if (save_pst != NULL 3612 && save_pst->textlow != 0 3613 && !(objfile->flags & OBJF_REORDERED)) 3614 { 3615 ALL_OBJFILE_PSYMTABS (objfile, pst) 3616 { 3617 if (save_pst != pst 3618 && save_pst->textlow >= pst->textlow 3619 && save_pst->textlow < pst->texthigh 3620 && save_pst->texthigh > pst->texthigh) 3621 { 3622 objfile->flags |= OBJF_REORDERED; 3623 break; 3624 } 3625 } 3626 } 3627 } 3628 3629 /* Now scan the FDRs for dependencies */ 3630 for (f_idx = 0; f_idx < hdr->ifdMax; f_idx++) 3631 { 3632 fh = f_idx + debug_info->fdr; 3633 pst = fdr_to_pst[f_idx].pst; 3634 3635 if (pst == (struct partial_symtab *) NULL) 3636 continue; 3637 3638 /* This should catch stabs-in-ecoff. */ 3639 if (fh->crfd <= 1) 3640 continue; 3641 3642 /* Skip the first file indirect entry as it is a self dependency 3643 for source files or a reverse .h -> .c dependency for header files. */ 3644 pst->number_of_dependencies = 0; 3645 pst->dependencies = 3646 ((struct partial_symtab **) 3647 obstack_alloc (&objfile->objfile_obstack, 3648 ((fh->crfd - 1) 3649 * sizeof (struct partial_symtab *)))); 3650 for (s_idx = 1; s_idx < fh->crfd; s_idx++) 3651 { 3652 RFDT rh; 3653 3654 (*swap_rfd_in) (cur_bfd, 3655 ((char *) debug_info->external_rfd 3656 + (fh->rfdBase + s_idx) * external_rfd_size), 3657 &rh); 3658 if (rh < 0 || rh >= hdr->ifdMax) 3659 { 3660 complaint (&symfile_complaints, "bad file number %ld", rh); 3661 continue; 3662 } 3663 3664 /* Skip self dependencies of header files. */ 3665 if (rh == f_idx) 3666 continue; 3667 3668 /* Do not add to dependeny list if psymtab was empty. */ 3669 if (fdr_to_pst[rh].pst == (struct partial_symtab *) NULL) 3670 continue; 3671 pst->dependencies[pst->number_of_dependencies++] = fdr_to_pst[rh].pst; 3672 } 3673 } 3674 3675 /* Remove the dummy psymtab created for -O3 images above, if it is 3676 still empty, to enable the detection of stripped executables. */ 3677 if (objfile->psymtabs->next == NULL 3678 && objfile->psymtabs->number_of_dependencies == 0 3679 && objfile->psymtabs->n_global_syms == 0 3680 && objfile->psymtabs->n_static_syms == 0) 3681 objfile->psymtabs = NULL; 3682 do_cleanups (old_chain); 3683 } 3684 3685 /* If the current psymbol has an enumerated type, we need to add 3686 all the the enum constants to the partial symbol table. */ 3687 3688 static void 3689 handle_psymbol_enumerators (struct objfile *objfile, FDR *fh, int stype, 3690 CORE_ADDR svalue) 3691 { 3692 const bfd_size_type external_sym_size = debug_swap->external_sym_size; 3693 void (*const swap_sym_in) (bfd *, void *, SYMR *) = debug_swap->swap_sym_in; 3694 char *ext_sym = ((char *) debug_info->external_sym 3695 + ((fh->isymBase + cur_sdx + 1) * external_sym_size)); 3696 SYMR sh; 3697 TIR tir; 3698 3699 switch (stype) 3700 { 3701 case stEnum: 3702 break; 3703 3704 case stBlock: 3705 /* It is an enumerated type if the next symbol entry is a stMember 3706 and its auxiliary index is indexNil or its auxiliary entry 3707 is a plain btNil or btVoid. 3708 Alpha cc -migrate enums are recognized by a zero index and 3709 a zero symbol value. 3710 DU 4.0 cc enums are recognized by a member type of btEnum without 3711 qualifiers and a zero symbol value. */ 3712 (*swap_sym_in) (cur_bfd, ext_sym, &sh); 3713 if (sh.st != stMember) 3714 return; 3715 3716 if (sh.index == indexNil 3717 || (sh.index == 0 && svalue == 0)) 3718 break; 3719 (*debug_swap->swap_tir_in) (fh->fBigendian, 3720 &(debug_info->external_aux 3721 + fh->iauxBase + sh.index)->a_ti, 3722 &tir); 3723 if ((tir.bt != btNil 3724 && tir.bt != btVoid 3725 && (tir.bt != btEnum || svalue != 0)) 3726 || tir.tq0 != tqNil) 3727 return; 3728 break; 3729 3730 default: 3731 return; 3732 } 3733 3734 for (;;) 3735 { 3736 char *name; 3737 3738 (*swap_sym_in) (cur_bfd, ext_sym, &sh); 3739 if (sh.st != stMember) 3740 break; 3741 name = debug_info->ss + cur_fdr->issBase + sh.iss; 3742 3743 /* Note that the value doesn't matter for enum constants 3744 in psymtabs, just in symtabs. */ 3745 add_psymbol_to_list (name, strlen (name), 3746 VAR_DOMAIN, LOC_CONST, 3747 &objfile->static_psymbols, 0, 3748 (CORE_ADDR) 0, psymtab_language, objfile); 3749 ext_sym += external_sym_size; 3750 } 3751 } 3752 3753 /* Get the next symbol. OBJFILE is unused. */ 3754 3755 static char * 3756 mdebug_next_symbol_text (struct objfile *objfile) 3757 { 3758 SYMR sh; 3759 3760 cur_sdx++; 3761 (*debug_swap->swap_sym_in) (cur_bfd, 3762 ((char *) debug_info->external_sym 3763 + ((cur_fdr->isymBase + cur_sdx) 3764 * debug_swap->external_sym_size)), 3765 &sh); 3766 return debug_info->ss + cur_fdr->issBase + sh.iss; 3767 } 3768 3769 /* Ancillary function to psymtab_to_symtab(). Does all the work 3770 for turning the partial symtab PST into a symtab, recurring 3771 first on all dependent psymtabs. The argument FILENAME is 3772 only passed so we can see in debug stack traces what file 3773 is being read. 3774 3775 This function has a split personality, based on whether the 3776 symbol table contains ordinary ecoff symbols, or stabs-in-ecoff. 3777 The flow of control and even the memory allocation differs. FIXME. */ 3778 3779 static void 3780 psymtab_to_symtab_1 (struct partial_symtab *pst, char *filename) 3781 { 3782 bfd_size_type external_sym_size; 3783 bfd_size_type external_pdr_size; 3784 void (*swap_sym_in) (bfd *, void *, SYMR *); 3785 void (*swap_pdr_in) (bfd *, void *, PDR *); 3786 int i; 3787 struct symtab *st = NULL; 3788 FDR *fh; 3789 struct linetable *lines; 3790 CORE_ADDR lowest_pdr_addr = 0; 3791 int last_symtab_ended = 0; 3792 3793 if (pst->readin) 3794 return; 3795 pst->readin = 1; 3796 3797 /* Read in all partial symbtabs on which this one is dependent. 3798 NOTE that we do have circular dependencies, sigh. We solved 3799 that by setting pst->readin before this point. */ 3800 3801 for (i = 0; i < pst->number_of_dependencies; i++) 3802 if (!pst->dependencies[i]->readin) 3803 { 3804 /* Inform about additional files to be read in. */ 3805 if (info_verbose) 3806 { 3807 fputs_filtered (" ", gdb_stdout); 3808 wrap_here (""); 3809 fputs_filtered ("and ", gdb_stdout); 3810 wrap_here (""); 3811 printf_filtered ("%s...", 3812 pst->dependencies[i]->filename); 3813 wrap_here (""); /* Flush output */ 3814 gdb_flush (gdb_stdout); 3815 } 3816 /* We only pass the filename for debug purposes */ 3817 psymtab_to_symtab_1 (pst->dependencies[i], 3818 pst->dependencies[i]->filename); 3819 } 3820 3821 /* Do nothing if this is a dummy psymtab. */ 3822 3823 if (pst->n_global_syms == 0 && pst->n_static_syms == 0 3824 && pst->textlow == 0 && pst->texthigh == 0) 3825 return; 3826 3827 /* Now read the symbols for this symtab */ 3828 3829 cur_bfd = CUR_BFD (pst); 3830 debug_swap = DEBUG_SWAP (pst); 3831 debug_info = DEBUG_INFO (pst); 3832 pending_list = PENDING_LIST (pst); 3833 external_sym_size = debug_swap->external_sym_size; 3834 external_pdr_size = debug_swap->external_pdr_size; 3835 swap_sym_in = debug_swap->swap_sym_in; 3836 swap_pdr_in = debug_swap->swap_pdr_in; 3837 current_objfile = pst->objfile; 3838 cur_fd = FDR_IDX (pst); 3839 fh = ((cur_fd == -1) 3840 ? (FDR *) NULL 3841 : debug_info->fdr + cur_fd); 3842 cur_fdr = fh; 3843 3844 /* See comment in parse_partial_symbols about the @stabs sentinel. */ 3845 processing_gcc_compilation = 0; 3846 if (fh != (FDR *) NULL && fh->csym >= 2) 3847 { 3848 SYMR sh; 3849 3850 (*swap_sym_in) (cur_bfd, 3851 ((char *) debug_info->external_sym 3852 + (fh->isymBase + 1) * external_sym_size), 3853 &sh); 3854 if (strcmp (debug_info->ss + fh->issBase + sh.iss, 3855 stabs_symbol) == 0) 3856 { 3857 /* We indicate that this is a GCC compilation so that certain 3858 features will be enabled in stabsread/dbxread. */ 3859 processing_gcc_compilation = 2; 3860 } 3861 } 3862 3863 if (processing_gcc_compilation != 0) 3864 { 3865 3866 /* This symbol table contains stabs-in-ecoff entries. */ 3867 3868 /* Parse local symbols first */ 3869 3870 if (fh->csym <= 2) /* FIXME, this blows psymtab->symtab ptr */ 3871 { 3872 current_objfile = NULL; 3873 return; 3874 } 3875 for (cur_sdx = 2; cur_sdx < fh->csym; cur_sdx++) 3876 { 3877 SYMR sh; 3878 char *name; 3879 CORE_ADDR valu; 3880 3881 (*swap_sym_in) (cur_bfd, 3882 (((char *) debug_info->external_sym) 3883 + (fh->isymBase + cur_sdx) * external_sym_size), 3884 &sh); 3885 name = debug_info->ss + fh->issBase + sh.iss; 3886 valu = sh.value; 3887 /* XXX This is a hack. It will go away! */ 3888 if (ECOFF_IS_STAB (&sh) || (name[0] == '#')) 3889 { 3890 int type_code = ECOFF_UNMARK_STAB (sh.index); 3891 3892 /* We should never get non N_STAB symbols here, but they 3893 should be harmless, so keep process_one_symbol from 3894 complaining about them. */ 3895 if (type_code & N_STAB) 3896 { 3897 /* If we found a trailing N_SO with no name, process 3898 it here instead of in process_one_symbol, so we 3899 can keep a handle to its symtab. The symtab 3900 would otherwise be ended twice, once in 3901 process_one_symbol, and once after this loop. */ 3902 if (type_code == N_SO 3903 && last_source_file 3904 && previous_stab_code != (unsigned char) N_SO 3905 && *name == '\000') 3906 { 3907 valu += ANOFFSET (pst->section_offsets, 3908 SECT_OFF_TEXT (pst->objfile)); 3909 previous_stab_code = N_SO; 3910 st = end_symtab (valu, pst->objfile, 3911 SECT_OFF_TEXT (pst->objfile)); 3912 end_stabs (); 3913 last_symtab_ended = 1; 3914 } 3915 else 3916 { 3917 last_symtab_ended = 0; 3918 process_one_symbol (type_code, 0, valu, name, 3919 pst->section_offsets, pst->objfile); 3920 } 3921 } 3922 /* Similarly a hack. */ 3923 else if (name[0] == '#') 3924 { 3925 process_one_symbol (N_SLINE, 0, valu, name, 3926 pst->section_offsets, pst->objfile); 3927 } 3928 if (type_code == N_FUN) 3929 { 3930 /* Make up special symbol to contain 3931 procedure specific info */ 3932 struct mips_extra_func_info *e = 3933 ((struct mips_extra_func_info *) 3934 obstack_alloc (¤t_objfile->objfile_obstack, 3935 sizeof (struct mips_extra_func_info))); 3936 struct symbol *s = new_symbol (MIPS_EFI_SYMBOL_NAME); 3937 3938 memset (e, 0, sizeof (struct mips_extra_func_info)); 3939 SYMBOL_DOMAIN (s) = LABEL_DOMAIN; 3940 SYMBOL_CLASS (s) = LOC_CONST; 3941 SYMBOL_TYPE (s) = mdebug_type_void; 3942 SYMBOL_VALUE (s) = (long) e; 3943 e->pdr.framereg = -1; 3944 add_symbol_to_list (s, &local_symbols); 3945 } 3946 } 3947 else if (sh.st == stLabel) 3948 { 3949 if (sh.index == indexNil) 3950 { 3951 /* This is what the gcc2_compiled and __gnu_compiled_* 3952 show up as. So don't complain. */ 3953 ; 3954 } 3955 else 3956 { 3957 /* Handle encoded stab line number. */ 3958 valu += ANOFFSET (pst->section_offsets, SECT_OFF_TEXT (pst->objfile)); 3959 record_line (current_subfile, sh.index, valu); 3960 } 3961 } 3962 else if (sh.st == stProc || sh.st == stStaticProc 3963 || sh.st == stStatic || sh.st == stEnd) 3964 /* These are generated by gcc-2.x, do not complain */ 3965 ; 3966 else 3967 complaint (&symfile_complaints, "unknown stabs symbol %s", name); 3968 } 3969 3970 if (! last_symtab_ended) 3971 { 3972 st = end_symtab (pst->texthigh, pst->objfile, SECT_OFF_TEXT (pst->objfile)); 3973 end_stabs (); 3974 } 3975 3976 /* There used to be a call to sort_blocks here, but this should not 3977 be necessary for stabs symtabs. And as sort_blocks modifies the 3978 start address of the GLOBAL_BLOCK to the FIRST_LOCAL_BLOCK, 3979 it did the wrong thing if the first procedure in a file was 3980 generated via asm statements. */ 3981 3982 /* Fill in procedure info next. */ 3983 if (fh->cpd > 0) 3984 { 3985 PDR *pr_block; 3986 struct cleanup *old_chain; 3987 char *pdr_ptr; 3988 char *pdr_end; 3989 PDR *pdr_in; 3990 PDR *pdr_in_end; 3991 3992 pr_block = (PDR *) xmalloc (fh->cpd * sizeof (PDR)); 3993 old_chain = make_cleanup (xfree, pr_block); 3994 3995 pdr_ptr = ((char *) debug_info->external_pdr 3996 + fh->ipdFirst * external_pdr_size); 3997 pdr_end = pdr_ptr + fh->cpd * external_pdr_size; 3998 pdr_in = pr_block; 3999 for (; 4000 pdr_ptr < pdr_end; 4001 pdr_ptr += external_pdr_size, pdr_in++) 4002 { 4003 (*swap_pdr_in) (cur_bfd, pdr_ptr, pdr_in); 4004 4005 /* Determine lowest PDR address, the PDRs are not always 4006 sorted. */ 4007 if (pdr_in == pr_block) 4008 lowest_pdr_addr = pdr_in->adr; 4009 else if (pdr_in->adr < lowest_pdr_addr) 4010 lowest_pdr_addr = pdr_in->adr; 4011 } 4012 4013 pdr_in = pr_block; 4014 pdr_in_end = pdr_in + fh->cpd; 4015 for (; pdr_in < pdr_in_end; pdr_in++) 4016 parse_procedure (pdr_in, st, pst); 4017 4018 do_cleanups (old_chain); 4019 } 4020 } 4021 else 4022 { 4023 /* This symbol table contains ordinary ecoff entries. */ 4024 4025 int f_max; 4026 int maxlines; 4027 EXTR *ext_ptr; 4028 4029 if (fh == 0) 4030 { 4031 maxlines = 0; 4032 st = new_symtab ("unknown", 0, pst->objfile); 4033 } 4034 else 4035 { 4036 maxlines = 2 * fh->cline; 4037 st = new_symtab (pst->filename, maxlines, pst->objfile); 4038 4039 /* The proper language was already determined when building 4040 the psymtab, use it. */ 4041 st->language = PST_PRIVATE (pst)->pst_language; 4042 } 4043 4044 psymtab_language = st->language; 4045 4046 lines = LINETABLE (st); 4047 4048 /* Get a new lexical context */ 4049 4050 push_parse_stack (); 4051 top_stack->cur_st = st; 4052 top_stack->cur_block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (st), 4053 STATIC_BLOCK); 4054 BLOCK_START (top_stack->cur_block) = pst->textlow; 4055 BLOCK_END (top_stack->cur_block) = 0; 4056 top_stack->blocktype = stFile; 4057 top_stack->cur_type = 0; 4058 top_stack->procadr = 0; 4059 top_stack->numargs = 0; 4060 found_ecoff_debugging_info = 0; 4061 4062 if (fh) 4063 { 4064 char *sym_ptr; 4065 char *sym_end; 4066 4067 /* Parse local symbols first */ 4068 sym_ptr = ((char *) debug_info->external_sym 4069 + fh->isymBase * external_sym_size); 4070 sym_end = sym_ptr + fh->csym * external_sym_size; 4071 while (sym_ptr < sym_end) 4072 { 4073 SYMR sh; 4074 int c; 4075 4076 (*swap_sym_in) (cur_bfd, sym_ptr, &sh); 4077 c = parse_symbol (&sh, 4078 debug_info->external_aux + fh->iauxBase, 4079 sym_ptr, fh->fBigendian, pst->section_offsets, pst->objfile); 4080 sym_ptr += c * external_sym_size; 4081 } 4082 4083 /* Linenumbers. At the end, check if we can save memory. 4084 parse_lines has to look ahead an arbitrary number of PDR 4085 structures, so we swap them all first. */ 4086 if (fh->cpd > 0) 4087 { 4088 PDR *pr_block; 4089 struct cleanup *old_chain; 4090 char *pdr_ptr; 4091 char *pdr_end; 4092 PDR *pdr_in; 4093 PDR *pdr_in_end; 4094 4095 pr_block = (PDR *) xmalloc (fh->cpd * sizeof (PDR)); 4096 4097 old_chain = make_cleanup (xfree, pr_block); 4098 4099 pdr_ptr = ((char *) debug_info->external_pdr 4100 + fh->ipdFirst * external_pdr_size); 4101 pdr_end = pdr_ptr + fh->cpd * external_pdr_size; 4102 pdr_in = pr_block; 4103 for (; 4104 pdr_ptr < pdr_end; 4105 pdr_ptr += external_pdr_size, pdr_in++) 4106 { 4107 (*swap_pdr_in) (cur_bfd, pdr_ptr, pdr_in); 4108 4109 /* Determine lowest PDR address, the PDRs are not always 4110 sorted. */ 4111 if (pdr_in == pr_block) 4112 lowest_pdr_addr = pdr_in->adr; 4113 else if (pdr_in->adr < lowest_pdr_addr) 4114 lowest_pdr_addr = pdr_in->adr; 4115 } 4116 4117 parse_lines (fh, pr_block, lines, maxlines, pst, lowest_pdr_addr); 4118 if (lines->nitems < fh->cline) 4119 lines = shrink_linetable (lines); 4120 4121 /* Fill in procedure info next. */ 4122 pdr_in = pr_block; 4123 pdr_in_end = pdr_in + fh->cpd; 4124 for (; pdr_in < pdr_in_end; pdr_in++) 4125 parse_procedure (pdr_in, 0, pst); 4126 4127 do_cleanups (old_chain); 4128 } 4129 } 4130 4131 LINETABLE (st) = lines; 4132 4133 /* .. and our share of externals. 4134 XXX use the global list to speed up things here. how? 4135 FIXME, Maybe quit once we have found the right number of ext's? */ 4136 top_stack->cur_st = st; 4137 top_stack->cur_block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (top_stack->cur_st), 4138 GLOBAL_BLOCK); 4139 top_stack->blocktype = stFile; 4140 4141 ext_ptr = PST_PRIVATE (pst)->extern_tab; 4142 for (i = PST_PRIVATE (pst)->extern_count; --i >= 0; ext_ptr++) 4143 parse_external (ext_ptr, fh->fBigendian, pst->section_offsets, pst->objfile); 4144 4145 /* If there are undefined symbols, tell the user. 4146 The alpha has an undefined symbol for every symbol that is 4147 from a shared library, so tell the user only if verbose is on. */ 4148 if (info_verbose && n_undef_symbols) 4149 { 4150 printf_filtered ("File %s contains %d unresolved references:", 4151 st->filename, n_undef_symbols); 4152 printf_filtered ("\n\t%4d variables\n\t%4d procedures\n\t%4d labels\n", 4153 n_undef_vars, n_undef_procs, n_undef_labels); 4154 n_undef_symbols = n_undef_labels = n_undef_vars = n_undef_procs = 0; 4155 4156 } 4157 pop_parse_stack (); 4158 4159 st->primary = 1; 4160 4161 sort_blocks (st); 4162 } 4163 4164 /* Now link the psymtab and the symtab. */ 4165 pst->symtab = st; 4166 4167 current_objfile = NULL; 4168 } 4169 4170 /* Ancillary parsing procedures. */ 4171 4172 /* Return 1 if the symbol pointed to by SH has a cross reference 4173 to an opaque aggregate type, else 0. */ 4174 4175 static int 4176 has_opaque_xref (FDR *fh, SYMR *sh) 4177 { 4178 TIR tir; 4179 union aux_ext *ax; 4180 RNDXR rn[1]; 4181 unsigned int rf; 4182 4183 if (sh->index == indexNil) 4184 return 0; 4185 4186 ax = debug_info->external_aux + fh->iauxBase + sh->index; 4187 (*debug_swap->swap_tir_in) (fh->fBigendian, &ax->a_ti, &tir); 4188 if (tir.bt != btStruct && tir.bt != btUnion && tir.bt != btEnum) 4189 return 0; 4190 4191 ax++; 4192 (*debug_swap->swap_rndx_in) (fh->fBigendian, &ax->a_rndx, rn); 4193 if (rn->rfd == 0xfff) 4194 rf = AUX_GET_ISYM (fh->fBigendian, ax + 1); 4195 else 4196 rf = rn->rfd; 4197 if (rf != -1) 4198 return 0; 4199 return 1; 4200 } 4201 4202 /* Lookup the type at relative index RN. Return it in TPP 4203 if found and in any event come up with its name PNAME. 4204 BIGEND says whether aux symbols are big-endian or not (from fh->fBigendian). 4205 Return value says how many aux symbols we ate. */ 4206 4207 static int 4208 cross_ref (int fd, union aux_ext *ax, struct type **tpp, enum type_code type_code, /* Use to alloc new type if none is found. */ 4209 char **pname, int bigend, char *sym_name) 4210 { 4211 RNDXR rn[1]; 4212 unsigned int rf; 4213 int result = 1; 4214 FDR *fh; 4215 char *esh; 4216 SYMR sh; 4217 int xref_fd; 4218 struct mdebug_pending *pend; 4219 4220 *tpp = (struct type *) NULL; 4221 4222 (*debug_swap->swap_rndx_in) (bigend, &ax->a_rndx, rn); 4223 4224 /* Escape index means 'the next one' */ 4225 if (rn->rfd == 0xfff) 4226 { 4227 result++; 4228 rf = AUX_GET_ISYM (bigend, ax + 1); 4229 } 4230 else 4231 { 4232 rf = rn->rfd; 4233 } 4234 4235 /* mips cc uses a rf of -1 for opaque struct definitions. 4236 Set TYPE_FLAG_STUB for these types so that check_typedef will 4237 resolve them if the struct gets defined in another compilation unit. */ 4238 if (rf == -1) 4239 { 4240 *pname = "<undefined>"; 4241 *tpp = init_type (type_code, 0, TYPE_FLAG_STUB, (char *) NULL, current_objfile); 4242 return result; 4243 } 4244 4245 /* mips cc uses an escaped rn->index of 0 for struct return types 4246 of procedures that were compiled without -g. These will always remain 4247 undefined. */ 4248 if (rn->rfd == 0xfff && rn->index == 0) 4249 { 4250 *pname = "<undefined>"; 4251 return result; 4252 } 4253 4254 /* Find the relative file descriptor and the symbol in it. */ 4255 fh = get_rfd (fd, rf); 4256 xref_fd = fh - debug_info->fdr; 4257 4258 if (rn->index >= fh->csym) 4259 { 4260 /* File indirect entry is corrupt. */ 4261 *pname = "<illegal>"; 4262 bad_rfd_entry_complaint (sym_name, xref_fd, rn->index); 4263 return result; 4264 } 4265 4266 /* If we have processed this symbol then we left a forwarding 4267 pointer to the type in the pending list. If not, we`ll put 4268 it in a list of pending types, to be processed later when 4269 the file will be. In any event, we collect the name for the 4270 type here. */ 4271 4272 esh = ((char *) debug_info->external_sym 4273 + ((fh->isymBase + rn->index) 4274 * debug_swap->external_sym_size)); 4275 (*debug_swap->swap_sym_in) (cur_bfd, esh, &sh); 4276 4277 /* Make sure that this type of cross reference can be handled. */ 4278 if ((sh.sc != scInfo 4279 || (sh.st != stBlock && sh.st != stTypedef && sh.st != stIndirect 4280 && sh.st != stStruct && sh.st != stUnion 4281 && sh.st != stEnum)) 4282 && (sh.st != stBlock || !SC_IS_COMMON (sh.sc))) 4283 { 4284 /* File indirect entry is corrupt. */ 4285 *pname = "<illegal>"; 4286 bad_rfd_entry_complaint (sym_name, xref_fd, rn->index); 4287 return result; 4288 } 4289 4290 *pname = debug_info->ss + fh->issBase + sh.iss; 4291 4292 pend = is_pending_symbol (fh, esh); 4293 if (pend) 4294 *tpp = pend->t; 4295 else 4296 { 4297 /* We have not yet seen this type. */ 4298 4299 if ((sh.iss == 0 && sh.st == stTypedef) || sh.st == stIndirect) 4300 { 4301 TIR tir; 4302 4303 /* alpha cc puts out a stTypedef with a sh.iss of zero for 4304 two cases: 4305 a) forward declarations of structs/unions/enums which are not 4306 defined in this compilation unit. 4307 For these the type will be void. This is a bad design decision 4308 as cross referencing across compilation units is impossible 4309 due to the missing name. 4310 b) forward declarations of structs/unions/enums/typedefs which 4311 are defined later in this file or in another file in the same 4312 compilation unit. Irix5 cc uses a stIndirect symbol for this. 4313 Simply cross reference those again to get the true type. 4314 The forward references are not entered in the pending list and 4315 in the symbol table. */ 4316 4317 (*debug_swap->swap_tir_in) (bigend, 4318 &(debug_info->external_aux 4319 + fh->iauxBase + sh.index)->a_ti, 4320 &tir); 4321 if (tir.tq0 != tqNil) 4322 complaint (&symfile_complaints, 4323 "illegal tq0 in forward typedef for %s", sym_name); 4324 switch (tir.bt) 4325 { 4326 case btVoid: 4327 *tpp = init_type (type_code, 0, 0, (char *) NULL, 4328 current_objfile); 4329 *pname = "<undefined>"; 4330 break; 4331 4332 case btStruct: 4333 case btUnion: 4334 case btEnum: 4335 cross_ref (xref_fd, 4336 (debug_info->external_aux 4337 + fh->iauxBase + sh.index + 1), 4338 tpp, type_code, pname, 4339 fh->fBigendian, sym_name); 4340 break; 4341 4342 case btTypedef: 4343 /* Follow a forward typedef. This might recursively 4344 call cross_ref till we get a non typedef'ed type. 4345 FIXME: This is not correct behaviour, but gdb currently 4346 cannot handle typedefs without type copying. Type 4347 copying is impossible as we might have mutual forward 4348 references between two files and the copied type would not 4349 get filled in when we later parse its definition. */ 4350 *tpp = parse_type (xref_fd, 4351 debug_info->external_aux + fh->iauxBase, 4352 sh.index, 4353 (int *) NULL, 4354 fh->fBigendian, 4355 debug_info->ss + fh->issBase + sh.iss); 4356 add_pending (fh, esh, *tpp); 4357 break; 4358 4359 default: 4360 complaint (&symfile_complaints, 4361 "illegal bt %d in forward typedef for %s", tir.bt, 4362 sym_name); 4363 *tpp = init_type (type_code, 0, 0, (char *) NULL, 4364 current_objfile); 4365 break; 4366 } 4367 return result; 4368 } 4369 else if (sh.st == stTypedef) 4370 { 4371 /* Parse the type for a normal typedef. This might recursively call 4372 cross_ref till we get a non typedef'ed type. 4373 FIXME: This is not correct behaviour, but gdb currently 4374 cannot handle typedefs without type copying. But type copying is 4375 impossible as we might have mutual forward references between 4376 two files and the copied type would not get filled in when 4377 we later parse its definition. */ 4378 *tpp = parse_type (xref_fd, 4379 debug_info->external_aux + fh->iauxBase, 4380 sh.index, 4381 (int *) NULL, 4382 fh->fBigendian, 4383 debug_info->ss + fh->issBase + sh.iss); 4384 } 4385 else 4386 { 4387 /* Cross reference to a struct/union/enum which is defined 4388 in another file in the same compilation unit but that file 4389 has not been parsed yet. 4390 Initialize the type only, it will be filled in when 4391 it's definition is parsed. */ 4392 *tpp = init_type (type_code, 0, 0, (char *) NULL, current_objfile); 4393 } 4394 add_pending (fh, esh, *tpp); 4395 } 4396 4397 /* We used one auxent normally, two if we got a "next one" rf. */ 4398 return result; 4399 } 4400 4401 4402 /* Quick&dirty lookup procedure, to avoid the MI ones that require 4403 keeping the symtab sorted */ 4404 4405 static struct symbol * 4406 mylookup_symbol (char *name, struct block *block, 4407 domain_enum domain, enum address_class class) 4408 { 4409 struct dict_iterator iter; 4410 int inc; 4411 struct symbol *sym; 4412 4413 inc = name[0]; 4414 ALL_BLOCK_SYMBOLS (block, iter, sym) 4415 { 4416 if (DEPRECATED_SYMBOL_NAME (sym)[0] == inc 4417 && SYMBOL_DOMAIN (sym) == domain 4418 && SYMBOL_CLASS (sym) == class 4419 && strcmp (DEPRECATED_SYMBOL_NAME (sym), name) == 0) 4420 return sym; 4421 } 4422 4423 block = BLOCK_SUPERBLOCK (block); 4424 if (block) 4425 return mylookup_symbol (name, block, domain, class); 4426 return 0; 4427 } 4428 4429 4430 /* Add a new symbol S to a block B. */ 4431 4432 static void 4433 add_symbol (struct symbol *s, struct block *b) 4434 { 4435 dict_add_symbol (BLOCK_DICT (b), s); 4436 } 4437 4438 /* Add a new block B to a symtab S */ 4439 4440 static void 4441 add_block (struct block *b, struct symtab *s) 4442 { 4443 struct blockvector *bv = BLOCKVECTOR (s); 4444 4445 bv = (struct blockvector *) xrealloc ((void *) bv, 4446 (sizeof (struct blockvector) 4447 + BLOCKVECTOR_NBLOCKS (bv) 4448 * sizeof (bv->block))); 4449 if (bv != BLOCKVECTOR (s)) 4450 BLOCKVECTOR (s) = bv; 4451 4452 BLOCKVECTOR_BLOCK (bv, BLOCKVECTOR_NBLOCKS (bv)++) = b; 4453 } 4454 4455 /* Add a new linenumber entry (LINENO,ADR) to a linevector LT. 4456 MIPS' linenumber encoding might need more than one byte 4457 to describe it, LAST is used to detect these continuation lines. 4458 4459 Combining lines with the same line number seems like a bad idea. 4460 E.g: There could be a line number entry with the same line number after the 4461 prologue and GDB should not ignore it (this is a better way to find 4462 a prologue than mips_skip_prologue). 4463 But due to the compressed line table format there are line number entries 4464 for the same line which are needed to bridge the gap to the next 4465 line number entry. These entries have a bogus address info with them 4466 and we are unable to tell them from intended duplicate line number 4467 entries. 4468 This is another reason why -ggdb debugging format is preferable. */ 4469 4470 static int 4471 add_line (struct linetable *lt, int lineno, CORE_ADDR adr, int last) 4472 { 4473 /* DEC c89 sometimes produces zero linenos which confuse gdb. 4474 Change them to something sensible. */ 4475 if (lineno == 0) 4476 lineno = 1; 4477 if (last == 0) 4478 last = -2; /* make sure we record first line */ 4479 4480 if (last == lineno) /* skip continuation lines */ 4481 return lineno; 4482 4483 lt->item[lt->nitems].line = lineno; 4484 lt->item[lt->nitems++].pc = adr << 2; 4485 return lineno; 4486 } 4487 4488 /* Sorting and reordering procedures */ 4489 4490 /* Blocks with a smaller low bound should come first */ 4491 4492 static int 4493 compare_blocks (const void *arg1, const void *arg2) 4494 { 4495 LONGEST addr_diff; 4496 struct block **b1 = (struct block **) arg1; 4497 struct block **b2 = (struct block **) arg2; 4498 4499 addr_diff = (BLOCK_START ((*b1))) - (BLOCK_START ((*b2))); 4500 if (addr_diff == 0) 4501 return (BLOCK_END ((*b2))) - (BLOCK_END ((*b1))); 4502 return addr_diff; 4503 } 4504 4505 /* Sort the blocks of a symtab S. 4506 Reorder the blocks in the blockvector by code-address, 4507 as required by some MI search routines */ 4508 4509 static void 4510 sort_blocks (struct symtab *s) 4511 { 4512 struct blockvector *bv = BLOCKVECTOR (s); 4513 4514 if (BLOCKVECTOR_NBLOCKS (bv) <= 2) 4515 { 4516 /* Cosmetic */ 4517 if (BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) == 0) 4518 BLOCK_START (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) = 0; 4519 if (BLOCK_END (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) == 0) 4520 BLOCK_START (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) = 0; 4521 return; 4522 } 4523 /* 4524 * This is very unfortunate: normally all functions are compiled in 4525 * the order they are found, but if the file is compiled -O3 things 4526 * are very different. It would be nice to find a reliable test 4527 * to detect -O3 images in advance. 4528 */ 4529 if (BLOCKVECTOR_NBLOCKS (bv) > 3) 4530 qsort (&BLOCKVECTOR_BLOCK (bv, FIRST_LOCAL_BLOCK), 4531 BLOCKVECTOR_NBLOCKS (bv) - FIRST_LOCAL_BLOCK, 4532 sizeof (struct block *), 4533 compare_blocks); 4534 4535 { 4536 CORE_ADDR high = 0; 4537 int i, j = BLOCKVECTOR_NBLOCKS (bv); 4538 4539 for (i = FIRST_LOCAL_BLOCK; i < j; i++) 4540 if (high < BLOCK_END (BLOCKVECTOR_BLOCK (bv, i))) 4541 high = BLOCK_END (BLOCKVECTOR_BLOCK (bv, i)); 4542 BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) = high; 4543 } 4544 4545 BLOCK_START (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) = 4546 BLOCK_START (BLOCKVECTOR_BLOCK (bv, FIRST_LOCAL_BLOCK)); 4547 4548 BLOCK_START (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) = 4549 BLOCK_START (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)); 4550 BLOCK_END (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) = 4551 BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)); 4552 } 4553 4554 4555 /* Constructor/restructor/destructor procedures */ 4556 4557 /* Allocate a new symtab for NAME. Needs an estimate of how many 4558 linenumbers MAXLINES we'll put in it */ 4559 4560 static struct symtab * 4561 new_symtab (char *name, int maxlines, struct objfile *objfile) 4562 { 4563 struct symtab *s = allocate_symtab (name, objfile); 4564 4565 LINETABLE (s) = new_linetable (maxlines); 4566 4567 /* All symtabs must have at least two blocks */ 4568 BLOCKVECTOR (s) = new_bvect (2); 4569 BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK) 4570 = new_block (NON_FUNCTION_BLOCK); 4571 BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK) 4572 = new_block (NON_FUNCTION_BLOCK); 4573 BLOCK_SUPERBLOCK (BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK)) = 4574 BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK); 4575 4576 s->free_code = free_linetable; 4577 s->debugformat = obsavestring ("ECOFF", 5, 4578 &objfile->objfile_obstack); 4579 return (s); 4580 } 4581 4582 /* Allocate a new partial_symtab NAME */ 4583 4584 static struct partial_symtab * 4585 new_psymtab (char *name, struct objfile *objfile) 4586 { 4587 struct partial_symtab *psymtab; 4588 4589 psymtab = allocate_psymtab (name, objfile); 4590 psymtab->section_offsets = objfile->section_offsets; 4591 4592 /* Keep a backpointer to the file's symbols */ 4593 4594 psymtab->read_symtab_private = ((char *) 4595 obstack_alloc (&objfile->objfile_obstack, 4596 sizeof (struct symloc))); 4597 memset (psymtab->read_symtab_private, 0, sizeof (struct symloc)); 4598 CUR_BFD (psymtab) = cur_bfd; 4599 DEBUG_SWAP (psymtab) = debug_swap; 4600 DEBUG_INFO (psymtab) = debug_info; 4601 PENDING_LIST (psymtab) = pending_list; 4602 4603 /* The way to turn this into a symtab is to call... */ 4604 psymtab->read_symtab = mdebug_psymtab_to_symtab; 4605 return (psymtab); 4606 } 4607 4608 4609 /* Allocate a linetable array of the given SIZE. Since the struct 4610 already includes one item, we subtract one when calculating the 4611 proper size to allocate. */ 4612 4613 static struct linetable * 4614 new_linetable (int size) 4615 { 4616 struct linetable *l; 4617 4618 size = (size - 1) * sizeof (l->item) + sizeof (struct linetable); 4619 l = (struct linetable *) xmalloc (size); 4620 l->nitems = 0; 4621 return l; 4622 } 4623 4624 /* Oops, too big. Shrink it. This was important with the 2.4 linetables, 4625 I am not so sure about the 3.4 ones. 4626 4627 Since the struct linetable already includes one item, we subtract one when 4628 calculating the proper size to allocate. */ 4629 4630 static struct linetable * 4631 shrink_linetable (struct linetable *lt) 4632 { 4633 4634 return (struct linetable *) xrealloc ((void *) lt, 4635 (sizeof (struct linetable) 4636 + ((lt->nitems - 1) 4637 * sizeof (lt->item)))); 4638 } 4639 4640 /* Allocate and zero a new blockvector of NBLOCKS blocks. */ 4641 4642 static struct blockvector * 4643 new_bvect (int nblocks) 4644 { 4645 struct blockvector *bv; 4646 int size; 4647 4648 size = sizeof (struct blockvector) + nblocks * sizeof (struct block *); 4649 bv = (struct blockvector *) xzalloc (size); 4650 4651 BLOCKVECTOR_NBLOCKS (bv) = nblocks; 4652 4653 return bv; 4654 } 4655 4656 /* Allocate and zero a new block, and set its BLOCK_DICT. If function 4657 is non-zero, assume the block is associated to a function, and make 4658 sure that the symbols are stored linearly; otherwise, store them 4659 hashed. */ 4660 4661 static struct block * 4662 new_block (enum block_type type) 4663 { 4664 /* FIXME: carlton/2003-09-11: This should use allocate_block to 4665 allocate the block. Which, in turn, suggests that the block 4666 should be allocated on an obstack. */ 4667 struct block *retval = xzalloc (sizeof (struct block)); 4668 4669 if (type == FUNCTION_BLOCK) 4670 BLOCK_DICT (retval) = dict_create_linear_expandable (); 4671 else 4672 BLOCK_DICT (retval) = dict_create_hashed_expandable (); 4673 4674 return retval; 4675 } 4676 4677 /* Create a new symbol with printname NAME */ 4678 4679 static struct symbol * 4680 new_symbol (char *name) 4681 { 4682 struct symbol *s = ((struct symbol *) 4683 obstack_alloc (¤t_objfile->objfile_obstack, 4684 sizeof (struct symbol))); 4685 4686 memset (s, 0, sizeof (*s)); 4687 SYMBOL_LANGUAGE (s) = psymtab_language; 4688 SYMBOL_SET_NAMES (s, name, strlen (name), current_objfile); 4689 return s; 4690 } 4691 4692 /* Create a new type with printname NAME */ 4693 4694 static struct type * 4695 new_type (char *name) 4696 { 4697 struct type *t; 4698 4699 t = alloc_type (current_objfile); 4700 TYPE_NAME (t) = name; 4701 TYPE_CPLUS_SPECIFIC (t) = (struct cplus_struct_type *) &cplus_struct_default; 4702 return t; 4703 } 4704 4705 /* Read ECOFF debugging information from a BFD section. This is 4706 called from elfread.c. It parses the section into a 4707 ecoff_debug_info struct, and then lets the rest of the file handle 4708 it as normal. */ 4709 4710 void 4711 elfmdebug_build_psymtabs (struct objfile *objfile, 4712 const struct ecoff_debug_swap *swap, asection *sec) 4713 { 4714 bfd *abfd = objfile->obfd; 4715 struct ecoff_debug_info *info; 4716 struct cleanup *back_to; 4717 4718 /* FIXME: It's not clear whether we should be getting minimal symbol 4719 information from .mdebug in an ELF file, or whether we will. 4720 Re-initialize the minimal symbol reader in case we do. */ 4721 4722 init_minimal_symbol_collection (); 4723 back_to = make_cleanup_discard_minimal_symbols (); 4724 4725 info = ((struct ecoff_debug_info *) 4726 obstack_alloc (&objfile->objfile_obstack, 4727 sizeof (struct ecoff_debug_info))); 4728 4729 if (!(*swap->read_debug_info) (abfd, sec, info)) 4730 error ("Error reading ECOFF debugging information: %s", 4731 bfd_errmsg (bfd_get_error ())); 4732 4733 mdebug_build_psymtabs (objfile, swap, info); 4734 4735 install_minimal_symbols (objfile); 4736 do_cleanups (back_to); 4737 } 4738 4739 void 4740 _initialize_mdebugread (void) 4741 { 4742 mdebug_type_void = 4743 init_type (TYPE_CODE_VOID, 1, 4744 0, 4745 "void", (struct objfile *) NULL); 4746 mdebug_type_char = 4747 init_type (TYPE_CODE_INT, 1, 4748 0, 4749 "char", (struct objfile *) NULL); 4750 mdebug_type_unsigned_char = 4751 init_type (TYPE_CODE_INT, 1, 4752 TYPE_FLAG_UNSIGNED, 4753 "unsigned char", (struct objfile *) NULL); 4754 mdebug_type_short = 4755 init_type (TYPE_CODE_INT, 2, 4756 0, 4757 "short", (struct objfile *) NULL); 4758 mdebug_type_unsigned_short = 4759 init_type (TYPE_CODE_INT, 2, 4760 TYPE_FLAG_UNSIGNED, 4761 "unsigned short", (struct objfile *) NULL); 4762 mdebug_type_int_32 = 4763 init_type (TYPE_CODE_INT, 4, 4764 0, 4765 "int", (struct objfile *) NULL); 4766 mdebug_type_unsigned_int_32 = 4767 init_type (TYPE_CODE_INT, 4, 4768 TYPE_FLAG_UNSIGNED, 4769 "unsigned int", (struct objfile *) NULL); 4770 mdebug_type_int_64 = 4771 init_type (TYPE_CODE_INT, 8, 4772 0, 4773 "int", (struct objfile *) NULL); 4774 mdebug_type_unsigned_int_64 = 4775 init_type (TYPE_CODE_INT, 8, 4776 TYPE_FLAG_UNSIGNED, 4777 "unsigned int", (struct objfile *) NULL); 4778 mdebug_type_long_32 = 4779 init_type (TYPE_CODE_INT, 4, 4780 0, 4781 "long", (struct objfile *) NULL); 4782 mdebug_type_unsigned_long_32 = 4783 init_type (TYPE_CODE_INT, 4, 4784 TYPE_FLAG_UNSIGNED, 4785 "unsigned long", (struct objfile *) NULL); 4786 mdebug_type_long_64 = 4787 init_type (TYPE_CODE_INT, 8, 4788 0, 4789 "long", (struct objfile *) NULL); 4790 mdebug_type_unsigned_long_64 = 4791 init_type (TYPE_CODE_INT, 8, 4792 TYPE_FLAG_UNSIGNED, 4793 "unsigned long", (struct objfile *) NULL); 4794 mdebug_type_long_long_64 = 4795 init_type (TYPE_CODE_INT, 8, 4796 0, 4797 "long long", (struct objfile *) NULL); 4798 mdebug_type_unsigned_long_long_64 = 4799 init_type (TYPE_CODE_INT, 8, 4800 TYPE_FLAG_UNSIGNED, 4801 "unsigned long long", (struct objfile *) NULL); 4802 mdebug_type_adr_32 = 4803 init_type (TYPE_CODE_PTR, 4, 4804 TYPE_FLAG_UNSIGNED, 4805 "adr_32", (struct objfile *) NULL); 4806 TYPE_TARGET_TYPE (mdebug_type_adr_32) = mdebug_type_void; 4807 mdebug_type_adr_64 = 4808 init_type (TYPE_CODE_PTR, 8, 4809 TYPE_FLAG_UNSIGNED, 4810 "adr_64", (struct objfile *) NULL); 4811 TYPE_TARGET_TYPE (mdebug_type_adr_64) = mdebug_type_void; 4812 mdebug_type_float = 4813 init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT, 4814 0, 4815 "float", (struct objfile *) NULL); 4816 mdebug_type_double = 4817 init_type (TYPE_CODE_FLT, TARGET_DOUBLE_BIT / TARGET_CHAR_BIT, 4818 0, 4819 "double", (struct objfile *) NULL); 4820 mdebug_type_complex = 4821 init_type (TYPE_CODE_COMPLEX, 2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT, 4822 0, 4823 "complex", (struct objfile *) NULL); 4824 TYPE_TARGET_TYPE (mdebug_type_complex) = mdebug_type_float; 4825 mdebug_type_double_complex = 4826 init_type (TYPE_CODE_COMPLEX, 2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT, 4827 0, 4828 "double complex", (struct objfile *) NULL); 4829 TYPE_TARGET_TYPE (mdebug_type_double_complex) = mdebug_type_double; 4830 4831 /* Is a "string" the way btString means it the same as TYPE_CODE_STRING? 4832 FIXME. */ 4833 mdebug_type_string = 4834 init_type (TYPE_CODE_STRING, 4835 TARGET_CHAR_BIT / TARGET_CHAR_BIT, 4836 0, "string", 4837 (struct objfile *) NULL); 4838 4839 /* We use TYPE_CODE_INT to print these as integers. Does this do any 4840 good? Would we be better off with TYPE_CODE_ERROR? Should 4841 TYPE_CODE_ERROR print things in hex if it knows the size? */ 4842 mdebug_type_fixed_dec = 4843 init_type (TYPE_CODE_INT, 4844 TARGET_INT_BIT / TARGET_CHAR_BIT, 4845 0, "fixed decimal", 4846 (struct objfile *) NULL); 4847 4848 mdebug_type_float_dec = 4849 init_type (TYPE_CODE_ERROR, 4850 TARGET_DOUBLE_BIT / TARGET_CHAR_BIT, 4851 0, "floating decimal", 4852 (struct objfile *) NULL); 4853 4854 nodebug_func_symbol_type = init_type (TYPE_CODE_FUNC, 1, 0, 4855 "<function, no debug info>", NULL); 4856 TYPE_TARGET_TYPE (nodebug_func_symbol_type) = mdebug_type_int; 4857 nodebug_var_symbol_type = 4858 init_type (TYPE_CODE_INT, TARGET_INT_BIT / HOST_CHAR_BIT, 0, 4859 "<variable, no debug info>", NULL); 4860 } 4861