* mdebugread.c (parse_symbol): Handle sh.value of zero for enums.
[binutils-gdb.git] / gdb / mdebugread.c
1 /* Read a symbol table in ECOFF format (Third-Eye).
2 Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1994, 1995
3 Free Software Foundation, Inc.
4 Original version contributed by Alessandro Forin (af@cs.cmu.edu) at
5 CMU. Major work by Per Bothner, John Gilmore and Ian Lance Taylor
6 at Cygnus Support.
7
8 This file is part of GDB.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
23
24 /* This module provides the function mdebug_build_psymtabs. It reads
25 ECOFF debugging information into partial symbol tables. The
26 debugging information is read from two structures. A struct
27 ecoff_debug_swap includes the sizes of each ECOFF structure and
28 swapping routines; these are fixed for a particular target. A
29 struct ecoff_debug_info points to the debugging information for a
30 particular object file.
31
32 ECOFF symbol tables are mostly written in the byte order of the
33 target machine. However, one section of the table (the auxiliary
34 symbol information) is written in the host byte order. There is a
35 bit in the other symbol info which describes which host byte order
36 was used. ECOFF thereby takes the trophy from Intel `b.out' for
37 the most brain-dead adaptation of a file format to byte order.
38
39 This module can read all four of the known byte-order combinations,
40 on any type of host. */
41
42 #include "defs.h"
43 #include "symtab.h"
44 #include "gdbtypes.h"
45 #include "gdbcore.h"
46 #include "symfile.h"
47 #include "objfiles.h"
48 #include "obstack.h"
49 #include "buildsym.h"
50 #include "stabsread.h"
51 #include "complaints.h"
52
53 #if !defined (SEEK_SET)
54 #define SEEK_SET 0
55 #define SEEK_CUR 1
56 #endif
57
58 /* These are needed if the tm.h file does not contain the necessary
59 mips specific definitions. */
60
61 #ifndef MIPS_EFI_SYMBOL_NAME
62 #define MIPS_EFI_SYMBOL_NAME "__GDB_EFI_INFO__"
63 #include "coff/sym.h"
64 #include "coff/symconst.h"
65 typedef struct mips_extra_func_info {
66 long numargs;
67 PDR pdr;
68 } *mips_extra_func_info_t;
69 #ifndef RA_REGNUM
70 #define RA_REGNUM 0
71 #endif
72 #endif
73
74 #ifdef USG
75 #include <sys/types.h>
76 #endif
77
78 #include <sys/param.h>
79 #include <sys/file.h>
80 #include "gdb_stat.h"
81 #include "gdb_string.h"
82
83 #include "gdb-stabs.h"
84
85 #include "bfd.h"
86
87 #include "coff/ecoff.h" /* COFF-like aspects of ecoff files */
88
89 #include "libaout.h" /* Private BFD a.out information. */
90 #include "aout/aout64.h"
91 #include "aout/stab_gnu.h" /* STABS information */
92
93 #include "expression.h"
94 #include "language.h" /* Needed inside partial-stab.h */
95
96 /* Provide a default mapping from a ecoff register number to a gdb REGNUM. */
97 #ifndef ECOFF_REG_TO_REGNUM
98 #define ECOFF_REG_TO_REGNUM(num) (num)
99 #endif
100 \f
101 /* We put a pointer to this structure in the read_symtab_private field
102 of the psymtab. */
103
104 struct symloc
105 {
106 /* Index of the FDR that this psymtab represents. */
107 int fdr_idx;
108 /* The BFD that the psymtab was created from. */
109 bfd *cur_bfd;
110 const struct ecoff_debug_swap *debug_swap;
111 struct ecoff_debug_info *debug_info;
112 struct mdebug_pending **pending_list;
113 /* Pointer to external symbols for this file. */
114 EXTR *extern_tab;
115 /* Size of extern_tab. */
116 int extern_count;
117 enum language pst_language;
118 };
119
120 #define PST_PRIVATE(p) ((struct symloc *)(p)->read_symtab_private)
121 #define FDR_IDX(p) (PST_PRIVATE(p)->fdr_idx)
122 #define CUR_BFD(p) (PST_PRIVATE(p)->cur_bfd)
123 #define DEBUG_SWAP(p) (PST_PRIVATE(p)->debug_swap)
124 #define DEBUG_INFO(p) (PST_PRIVATE(p)->debug_info)
125 #define PENDING_LIST(p) (PST_PRIVATE(p)->pending_list)
126 \f
127 /* Things we import explicitly from other modules */
128
129 extern int info_verbose;
130
131 /* Various complaints about symbol reading that don't abort the process */
132
133 static struct complaint bad_file_number_complaint =
134 {"bad file number %d", 0, 0};
135
136 static struct complaint index_complaint =
137 {"bad aux index at symbol %s", 0, 0};
138
139 static struct complaint aux_index_complaint =
140 {"bad proc end in aux found from symbol %s", 0, 0};
141
142 static struct complaint block_index_complaint =
143 {"bad aux index at block symbol %s", 0, 0};
144
145 static struct complaint unknown_ext_complaint =
146 {"unknown external symbol %s", 0, 0};
147
148 static struct complaint unknown_sym_complaint =
149 {"unknown local symbol %s", 0, 0};
150
151 static struct complaint unknown_st_complaint =
152 {"with type %d", 0, 0};
153
154 static struct complaint block_overflow_complaint =
155 {"block containing %s overfilled", 0, 0};
156
157 static struct complaint basic_type_complaint =
158 {"cannot map ECOFF basic type 0x%x for %s", 0, 0};
159
160 static struct complaint unknown_type_qual_complaint =
161 {"unknown type qualifier 0x%x", 0, 0};
162
163 static struct complaint array_index_type_complaint =
164 {"illegal array index type for %s, assuming int", 0, 0};
165
166 static struct complaint bad_tag_guess_complaint =
167 {"guessed tag type of %s incorrectly", 0, 0};
168
169 static struct complaint block_member_complaint =
170 {"declaration block contains unhandled symbol type %d", 0, 0};
171
172 static struct complaint stEnd_complaint =
173 {"stEnd with storage class %d not handled", 0, 0};
174
175 static struct complaint unknown_mdebug_symtype_complaint =
176 {"unknown symbol type 0x%x", 0, 0};
177
178 static struct complaint stab_unknown_complaint =
179 {"unknown stabs symbol %s", 0, 0};
180
181 static struct complaint pdr_for_nonsymbol_complaint =
182 {"PDR for %s, but no symbol", 0, 0};
183
184 static struct complaint pdr_static_symbol_complaint =
185 {"can't handle PDR for static proc at 0x%lx", 0, 0};
186
187 static struct complaint bad_setjmp_pdr_complaint =
188 {"fixing bad setjmp PDR from libc", 0, 0};
189
190 static struct complaint bad_fbitfield_complaint =
191 {"can't handle TIR fBitfield for %s", 0, 0};
192
193 static struct complaint bad_continued_complaint =
194 {"illegal TIR continued for %s", 0, 0};
195
196 static struct complaint bad_rfd_entry_complaint =
197 {"bad rfd entry for %s: file %d, index %d", 0, 0};
198
199 static struct complaint unexpected_type_code_complaint =
200 {"unexpected type code for %s", 0, 0};
201
202 static struct complaint unable_to_cross_ref_complaint =
203 {"unable to cross ref btTypedef for %s", 0, 0};
204
205 static struct complaint bad_indirect_xref_complaint =
206 {"unable to cross ref btIndirect for %s", 0, 0};
207
208 static struct complaint illegal_forward_tq0_complaint =
209 {"illegal tq0 in forward typedef for %s", 0, 0};
210
211 static struct complaint illegal_forward_bt_complaint =
212 {"illegal bt %d in forward typedef for %s", 0, 0};
213
214 static struct complaint bad_linetable_guess_complaint =
215 {"guessed size of linetable for %s incorrectly", 0, 0};
216
217 static struct complaint bad_ext_ifd_complaint =
218 {"bad ifd for external symbol: %d (max %d)", 0, 0};
219
220 static struct complaint bad_ext_iss_complaint =
221 {"bad iss for external symbol: %ld (max %ld)", 0, 0};
222
223 /* Macros and extra defs */
224
225 /* Puns: hard to find whether -g was used and how */
226
227 #define MIN_GLEVEL GLEVEL_0
228 #define compare_glevel(a,b) \
229 (((a) == GLEVEL_3) ? ((b) < GLEVEL_3) : \
230 ((b) == GLEVEL_3) ? -1 : (int)((b) - (a)))
231 \f
232 /* Things that really are local to this module */
233
234 /* Remember what we deduced to be the source language of this psymtab. */
235
236 static enum language psymtab_language = language_unknown;
237
238 /* Current BFD. */
239
240 static bfd *cur_bfd;
241
242 /* How to parse debugging information for CUR_BFD. */
243
244 static const struct ecoff_debug_swap *debug_swap;
245
246 /* Pointers to debugging information for CUR_BFD. */
247
248 static struct ecoff_debug_info *debug_info;
249
250 /* Pointer to current file decriptor record, and its index */
251
252 static FDR *cur_fdr;
253 static int cur_fd;
254
255 /* Index of current symbol */
256
257 static int cur_sdx;
258
259 /* Note how much "debuggable" this image is. We would like
260 to see at least one FDR with full symbols */
261
262 static max_gdbinfo;
263 static max_glevel;
264
265 /* When examining .o files, report on undefined symbols */
266
267 static int n_undef_symbols, n_undef_labels, n_undef_vars, n_undef_procs;
268
269 /* Pseudo symbol to use when putting stabs into the symbol table. */
270
271 static char stabs_symbol[] = STABS_SYMBOL;
272
273 /* Types corresponding to mdebug format bt* basic types. */
274
275 static struct type *mdebug_type_void;
276 static struct type *mdebug_type_char;
277 static struct type *mdebug_type_short;
278 static struct type *mdebug_type_int_32;
279 #define mdebug_type_int mdebug_type_int_32
280 static struct type *mdebug_type_int_64;
281 static struct type *mdebug_type_long_32;
282 static struct type *mdebug_type_long_64;
283 static struct type *mdebug_type_long_long_64;
284 static struct type *mdebug_type_unsigned_char;
285 static struct type *mdebug_type_unsigned_short;
286 static struct type *mdebug_type_unsigned_int_32;
287 static struct type *mdebug_type_unsigned_int_64;
288 static struct type *mdebug_type_unsigned_long_32;
289 static struct type *mdebug_type_unsigned_long_64;
290 static struct type *mdebug_type_unsigned_long_long_64;
291 static struct type *mdebug_type_adr_32;
292 static struct type *mdebug_type_adr_64;
293 static struct type *mdebug_type_float;
294 static struct type *mdebug_type_double;
295 static struct type *mdebug_type_complex;
296 static struct type *mdebug_type_double_complex;
297 static struct type *mdebug_type_fixed_dec;
298 static struct type *mdebug_type_float_dec;
299 static struct type *mdebug_type_string;
300
301 /* Types for symbols from files compiled without debugging info. */
302
303 static struct type *nodebug_func_symbol_type;
304 static struct type *nodebug_var_symbol_type;
305
306 /* Nonzero if we have seen ecoff debugging info for a file. */
307
308 static int found_ecoff_debugging_info;
309
310 /* Forward declarations */
311
312 static int
313 upgrade_type PARAMS ((int, struct type **, int, union aux_ext *, int, char *));
314
315 static void
316 parse_partial_symbols PARAMS ((struct objfile *,
317 struct section_offsets *));
318
319 static FDR
320 *get_rfd PARAMS ((int, int));
321
322 static int
323 has_opaque_xref PARAMS ((FDR *, SYMR *));
324
325 static int
326 cross_ref PARAMS ((int, union aux_ext *, struct type **, enum type_code,
327 char **, int, char *));
328
329 static struct symbol *
330 new_symbol PARAMS ((char *));
331
332 static struct type *
333 new_type PARAMS ((char *));
334
335 static struct block *
336 new_block PARAMS ((int));
337
338 static struct symtab *
339 new_symtab PARAMS ((char *, int, int, struct objfile *));
340
341 static struct linetable *
342 new_linetable PARAMS ((int));
343
344 static struct blockvector *
345 new_bvect PARAMS ((int));
346
347 static int
348 parse_symbol PARAMS ((SYMR *, union aux_ext *, char *, int, struct section_offsets *));
349
350 static struct type *
351 parse_type PARAMS ((int, union aux_ext *, unsigned int, int *, int, char *));
352
353 static struct symbol *
354 mylookup_symbol PARAMS ((char *, struct block *, enum namespace,
355 enum address_class));
356
357 static struct block *
358 shrink_block PARAMS ((struct block *, struct symtab *));
359
360 static PTR
361 xzalloc PARAMS ((unsigned int));
362
363 static void
364 sort_blocks PARAMS ((struct symtab *));
365
366 static int
367 compare_blocks PARAMS ((const void *, const void *));
368
369 static struct partial_symtab *
370 new_psymtab PARAMS ((char *, struct objfile *, struct section_offsets *));
371
372 static void
373 psymtab_to_symtab_1 PARAMS ((struct partial_symtab *, char *));
374
375 static void
376 add_block PARAMS ((struct block *, struct symtab *));
377
378 static void
379 add_symbol PARAMS ((struct symbol *, struct block *));
380
381 static int
382 add_line PARAMS ((struct linetable *, int, CORE_ADDR, int));
383
384 static struct linetable *
385 shrink_linetable PARAMS ((struct linetable *));
386
387 static void
388 handle_psymbol_enumerators PARAMS ((struct objfile *, FDR *, int));
389
390 static char *
391 mdebug_next_symbol_text PARAMS ((void));
392 \f
393 /* Address bounds for the signal trampoline in inferior, if any */
394
395 CORE_ADDR sigtramp_address, sigtramp_end;
396
397 /* Allocate zeroed memory */
398
399 static PTR
400 xzalloc (size)
401 unsigned int size;
402 {
403 PTR p = xmalloc (size);
404
405 memset (p, 0, size);
406 return p;
407 }
408
409 /* Exported procedure: Builds a symtab from the PST partial one.
410 Restores the environment in effect when PST was created, delegates
411 most of the work to an ancillary procedure, and sorts
412 and reorders the symtab list at the end */
413
414 static void
415 mdebug_psymtab_to_symtab (pst)
416 struct partial_symtab *pst;
417 {
418
419 if (!pst)
420 return;
421
422 if (info_verbose)
423 {
424 printf_filtered ("Reading in symbols for %s...", pst->filename);
425 gdb_flush (gdb_stdout);
426 }
427
428 next_symbol_text_func = mdebug_next_symbol_text;
429
430 psymtab_to_symtab_1 (pst, pst->filename);
431
432 /* Match with global symbols. This only needs to be done once,
433 after all of the symtabs and dependencies have been read in. */
434 scan_file_globals (pst->objfile);
435
436 if (info_verbose)
437 printf_filtered ("done.\n");
438 }
439 \f
440 /* File-level interface functions */
441
442 /* Find a file descriptor given its index RF relative to a file CF */
443
444 static FDR *
445 get_rfd (cf, rf)
446 int cf, rf;
447 {
448 FDR *fdrs;
449 register FDR *f;
450 RFDT rfd;
451
452 fdrs = debug_info->fdr;
453 f = fdrs + cf;
454 /* Object files do not have the RFD table, all refs are absolute */
455 if (f->rfdBase == 0)
456 return fdrs + rf;
457 (*debug_swap->swap_rfd_in) (cur_bfd,
458 ((char *) debug_info->external_rfd
459 + ((f->rfdBase + rf)
460 * debug_swap->external_rfd_size)),
461 &rfd);
462 return fdrs + rfd;
463 }
464
465 /* Return a safer print NAME for a file descriptor */
466
467 static char *
468 fdr_name (f)
469 FDR *f;
470 {
471 if (f->rss == -1)
472 return "<stripped file>";
473 if (f->rss == 0)
474 return "<NFY>";
475 return debug_info->ss + f->issBase + f->rss;
476 }
477
478
479 /* Read in and parse the symtab of the file OBJFILE. Symbols from
480 different sections are relocated via the SECTION_OFFSETS. */
481
482 void
483 mdebug_build_psymtabs (objfile, swap, info, section_offsets)
484 struct objfile *objfile;
485 const struct ecoff_debug_swap *swap;
486 struct ecoff_debug_info *info;
487 struct section_offsets *section_offsets;
488 {
489 cur_bfd = objfile->obfd;
490 debug_swap = swap;
491 debug_info = info;
492
493 /* Make sure all the FDR information is swapped in. */
494 if (info->fdr == (FDR *) NULL)
495 {
496 char *fdr_src;
497 char *fdr_end;
498 FDR *fdr_ptr;
499
500 info->fdr = (FDR *) obstack_alloc (&objfile->psymbol_obstack,
501 (info->symbolic_header.ifdMax
502 * sizeof (FDR)));
503 fdr_src = info->external_fdr;
504 fdr_end = (fdr_src
505 + info->symbolic_header.ifdMax * swap->external_fdr_size);
506 fdr_ptr = info->fdr;
507 for (; fdr_src < fdr_end; fdr_src += swap->external_fdr_size, fdr_ptr++)
508 (*swap->swap_fdr_in) (objfile->obfd, fdr_src, fdr_ptr);
509 }
510
511 parse_partial_symbols (objfile, section_offsets);
512
513 #if 0
514 /* Check to make sure file was compiled with -g. If not, warn the
515 user of this limitation. */
516 if (compare_glevel (max_glevel, GLEVEL_2) < 0)
517 {
518 if (max_gdbinfo == 0)
519 printf_unfiltered ("\n%s not compiled with -g, debugging support is limited.\n",
520 objfile->name);
521 printf_unfiltered ("You should compile with -g2 or -g3 for best debugging support.\n");
522 gdb_flush (gdb_stdout);
523 }
524 #endif
525 }
526 \f
527 /* Local utilities */
528
529 /* Map of FDR indexes to partial symtabs */
530
531 struct pst_map
532 {
533 struct partial_symtab *pst; /* the psymtab proper */
534 long n_globals; /* exported globals (external symbols) */
535 long globals_offset; /* cumulative */
536 };
537
538
539 /* Utility stack, used to nest procedures and blocks properly.
540 It is a doubly linked list, to avoid too many alloc/free.
541 Since we might need it quite a few times it is NOT deallocated
542 after use. */
543
544 static struct parse_stack
545 {
546 struct parse_stack *next, *prev;
547 struct symtab *cur_st; /* Current symtab. */
548 struct block *cur_block; /* Block in it. */
549
550 /* What are we parsing. stFile, or stBlock are for files and
551 blocks. stProc or stStaticProc means we have seen the start of a
552 procedure, but not the start of the block within in. When we see
553 the start of that block, we change it to stNil, without pushing a
554 new block, i.e. stNil means both a procedure and a block. */
555
556 int blocktype;
557
558 int maxsyms; /* Max symbols in this block. */
559 struct type *cur_type; /* Type we parse fields for. */
560 int cur_field; /* Field number in cur_type. */
561 CORE_ADDR procadr; /* Start addres of this procedure */
562 int numargs; /* Its argument count */
563 }
564
565 *top_stack; /* Top stack ptr */
566
567
568 /* Enter a new lexical context */
569
570 static void
571 push_parse_stack ()
572 {
573 struct parse_stack *new;
574
575 /* Reuse frames if possible */
576 if (top_stack && top_stack->prev)
577 new = top_stack->prev;
578 else
579 new = (struct parse_stack *) xzalloc (sizeof (struct parse_stack));
580 /* Initialize new frame with previous content */
581 if (top_stack)
582 {
583 register struct parse_stack *prev = new->prev;
584
585 *new = *top_stack;
586 top_stack->prev = new;
587 new->prev = prev;
588 new->next = top_stack;
589 }
590 top_stack = new;
591 }
592
593 /* Exit a lexical context */
594
595 static void
596 pop_parse_stack ()
597 {
598 if (!top_stack)
599 return;
600 if (top_stack->next)
601 top_stack = top_stack->next;
602 }
603
604
605 /* Cross-references might be to things we haven't looked at
606 yet, e.g. type references. To avoid too many type
607 duplications we keep a quick fixup table, an array
608 of lists of references indexed by file descriptor */
609
610 struct mdebug_pending
611 {
612 struct mdebug_pending *next; /* link */
613 char *s; /* the unswapped symbol */
614 struct type *t; /* its partial type descriptor */
615 };
616
617
618 /* The pending information is kept for an entire object file, and used
619 to be in the sym_private field. I took it out when I split
620 mdebugread from mipsread, because this might not be the only type
621 of symbols read from an object file. Instead, we allocate the
622 pending information table when we create the partial symbols, and
623 we store a pointer to the single table in each psymtab. */
624
625 static struct mdebug_pending **pending_list;
626
627 /* Check whether we already saw symbol SH in file FH */
628
629 static struct mdebug_pending *
630 is_pending_symbol (fh, sh)
631 FDR *fh;
632 char *sh;
633 {
634 int f_idx = fh - debug_info->fdr;
635 register struct mdebug_pending *p;
636
637 /* Linear search is ok, list is typically no more than 10 deep */
638 for (p = pending_list[f_idx]; p; p = p->next)
639 if (p->s == sh)
640 break;
641 return p;
642 }
643
644 /* Add a new symbol SH of type T */
645
646 static void
647 add_pending (fh, sh, t)
648 FDR *fh;
649 char *sh;
650 struct type *t;
651 {
652 int f_idx = fh - debug_info->fdr;
653 struct mdebug_pending *p = is_pending_symbol (fh, sh);
654
655 /* Make sure we do not make duplicates */
656 if (!p)
657 {
658 p = ((struct mdebug_pending *)
659 obstack_alloc (&current_objfile->psymbol_obstack,
660 sizeof (struct mdebug_pending)));
661 p->s = sh;
662 p->t = t;
663 p->next = pending_list[f_idx];
664 pending_list[f_idx] = p;
665 }
666 }
667 \f
668
669 /* Parsing Routines proper. */
670
671 /* Parse a single symbol. Mostly just make up a GDB symbol for it.
672 For blocks, procedures and types we open a new lexical context.
673 This is basically just a big switch on the symbol's type. Argument
674 AX is the base pointer of aux symbols for this file (fh->iauxBase).
675 EXT_SH points to the unswapped symbol, which is needed for struct,
676 union, etc., types; it is NULL for an EXTR. BIGEND says whether
677 aux symbols are big-endian or little-endian. Return count of
678 SYMR's handled (normally one). */
679
680 static int
681 parse_symbol (sh, ax, ext_sh, bigend, section_offsets)
682 SYMR *sh;
683 union aux_ext *ax;
684 char *ext_sh;
685 int bigend;
686 struct section_offsets *section_offsets;
687 {
688 const bfd_size_type external_sym_size = debug_swap->external_sym_size;
689 void (* const swap_sym_in) PARAMS ((bfd *, PTR, SYMR *)) =
690 debug_swap->swap_sym_in;
691 char *name;
692 struct symbol *s;
693 struct block *b;
694 struct mdebug_pending *pend;
695 struct type *t;
696 struct field *f;
697 int count = 1;
698 enum address_class class;
699 TIR tir;
700 long svalue = sh->value;
701 int bitsize;
702
703 if (ext_sh == (char *) NULL)
704 name = debug_info->ssext + sh->iss;
705 else
706 name = debug_info->ss + cur_fdr->issBase + sh->iss;
707
708 switch (sh->sc)
709 {
710 case scText:
711 /* Do not relocate relative values.
712 The value of a stEnd symbol is the displacement from the
713 corresponding start symbol value.
714 The value of a stBlock symbol is the displacement from the
715 procedure address. */
716 if (sh->st != stEnd && sh->st != stBlock)
717 sh->value += ANOFFSET (section_offsets, SECT_OFF_TEXT);
718 break;
719 case scData:
720 case scSData:
721 case scRData:
722 case scPData:
723 case scXData:
724 sh->value += ANOFFSET (section_offsets, SECT_OFF_DATA);
725 break;
726 case scBss:
727 case scSBss:
728 sh->value += ANOFFSET (section_offsets, SECT_OFF_BSS);
729 break;
730 }
731
732 switch (sh->st)
733 {
734 case stNil:
735 break;
736
737 case stGlobal: /* external symbol, goes into global block */
738 class = LOC_STATIC;
739 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (top_stack->cur_st),
740 GLOBAL_BLOCK);
741 s = new_symbol (name);
742 SYMBOL_VALUE_ADDRESS (s) = (CORE_ADDR) sh->value;
743 goto data;
744
745 case stStatic: /* static data, goes into current block. */
746 class = LOC_STATIC;
747 b = top_stack->cur_block;
748 s = new_symbol (name);
749 if (sh->sc == scCommon || sh->sc == scSCommon)
750 {
751 /* It is a FORTRAN common block. At least for SGI Fortran the
752 address is not in the symbol; we need to fix it later in
753 scan_file_globals. */
754 int bucket = hashname (SYMBOL_NAME (s));
755 SYMBOL_VALUE_CHAIN (s) = global_sym_chain[bucket];
756 global_sym_chain[bucket] = s;
757 }
758 else
759 SYMBOL_VALUE_ADDRESS (s) = (CORE_ADDR) sh->value;
760 goto data;
761
762 case stLocal: /* local variable, goes into current block */
763 if (sh->sc == scRegister)
764 {
765 class = LOC_REGISTER;
766 svalue = ECOFF_REG_TO_REGNUM (svalue);
767 }
768 else
769 class = LOC_LOCAL;
770 b = top_stack->cur_block;
771 s = new_symbol (name);
772 SYMBOL_VALUE (s) = svalue;
773
774 data: /* Common code for symbols describing data */
775 SYMBOL_NAMESPACE (s) = VAR_NAMESPACE;
776 SYMBOL_CLASS (s) = class;
777 add_symbol (s, b);
778
779 /* Type could be missing if file is compiled without debugging info. */
780 if (sh->sc == scUndefined || sh->sc == scNil || sh->index == indexNil)
781 SYMBOL_TYPE (s) = nodebug_var_symbol_type;
782 else
783 SYMBOL_TYPE (s) = parse_type (cur_fd, ax, sh->index, 0, bigend, name);
784 /* Value of a data symbol is its memory address */
785 break;
786
787 case stParam: /* arg to procedure, goes into current block */
788 max_gdbinfo++;
789 found_ecoff_debugging_info = 1;
790 top_stack->numargs++;
791
792 /* Special GNU C++ name. */
793 if (name[0] == CPLUS_MARKER && name[1] == 't' && name[2] == 0)
794 name = "this"; /* FIXME, not alloc'd in obstack */
795 s = new_symbol (name);
796
797 SYMBOL_NAMESPACE (s) = VAR_NAMESPACE;
798 switch (sh->sc)
799 {
800 case scRegister:
801 /* Pass by value in register. */
802 SYMBOL_CLASS(s) = LOC_REGPARM;
803 svalue = ECOFF_REG_TO_REGNUM (svalue);
804 break;
805 case scVar:
806 /* Pass by reference on stack. */
807 SYMBOL_CLASS(s) = LOC_REF_ARG;
808 break;
809 case scVarRegister:
810 /* Pass by reference in register. */
811 SYMBOL_CLASS(s) = LOC_REGPARM_ADDR;
812 svalue = ECOFF_REG_TO_REGNUM (svalue);
813 break;
814 default:
815 /* Pass by value on stack. */
816 SYMBOL_CLASS(s) = LOC_ARG;
817 break;
818 }
819 SYMBOL_VALUE (s) = svalue;
820 SYMBOL_TYPE (s) = parse_type (cur_fd, ax, sh->index, 0, bigend, name);
821 add_symbol (s, top_stack->cur_block);
822 break;
823
824 case stLabel: /* label, goes into current block */
825 s = new_symbol (name);
826 SYMBOL_NAMESPACE (s) = VAR_NAMESPACE; /* so that it can be used */
827 SYMBOL_CLASS (s) = LOC_LABEL; /* but not misused */
828 SYMBOL_VALUE_ADDRESS (s) = (CORE_ADDR) sh->value;
829 SYMBOL_TYPE (s) = mdebug_type_int;
830 add_symbol (s, top_stack->cur_block);
831 break;
832
833 case stProc: /* Procedure, usually goes into global block */
834 case stStaticProc: /* Static procedure, goes into current block */
835 s = new_symbol (name);
836 SYMBOL_NAMESPACE (s) = VAR_NAMESPACE;
837 SYMBOL_CLASS (s) = LOC_BLOCK;
838 /* Type of the return value */
839 if (sh->sc == scUndefined || sh->sc == scNil)
840 t = mdebug_type_int;
841 else
842 t = parse_type (cur_fd, ax, sh->index + 1, 0, bigend, name);
843 b = top_stack->cur_block;
844 if (sh->st == stProc)
845 {
846 struct blockvector *bv = BLOCKVECTOR (top_stack->cur_st);
847 /* The next test should normally be true, but provides a
848 hook for nested functions (which we don't want to make
849 global). */
850 if (b == BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK))
851 b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
852 /* Irix 5 sometimes has duplicate names for the same
853 function. We want to add such names up at the global
854 level, not as a nested function. */
855 else if (sh->value == top_stack->procadr)
856 b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
857 }
858 add_symbol (s, b);
859
860 /* Make a type for the procedure itself */
861 SYMBOL_TYPE (s) = lookup_function_type (t);
862
863 /* Create and enter a new lexical context */
864 b = new_block (top_stack->maxsyms);
865 SYMBOL_BLOCK_VALUE (s) = b;
866 BLOCK_FUNCTION (b) = s;
867 BLOCK_START (b) = BLOCK_END (b) = sh->value;
868 BLOCK_SUPERBLOCK (b) = top_stack->cur_block;
869 add_block (b, top_stack->cur_st);
870
871 /* Not if we only have partial info */
872 if (sh->sc == scUndefined || sh->sc == scNil)
873 break;
874
875 push_parse_stack ();
876 top_stack->cur_block = b;
877 top_stack->blocktype = sh->st;
878 top_stack->cur_type = SYMBOL_TYPE (s);
879 top_stack->cur_field = -1;
880 top_stack->procadr = sh->value;
881 top_stack->numargs = 0;
882 break;
883
884 /* Beginning of code for structure, union, and enum definitions.
885 They all share a common set of local variables, defined here. */
886 {
887 enum type_code type_code;
888 char *ext_tsym;
889 int nfields;
890 long max_value;
891 struct field *f;
892
893 case stStruct: /* Start a block defining a struct type */
894 type_code = TYPE_CODE_STRUCT;
895 goto structured_common;
896
897 case stUnion: /* Start a block defining a union type */
898 type_code = TYPE_CODE_UNION;
899 goto structured_common;
900
901 case stEnum: /* Start a block defining an enum type */
902 type_code = TYPE_CODE_ENUM;
903 goto structured_common;
904
905 case stBlock: /* Either a lexical block, or some type */
906 if (sh->sc != scInfo && sh->sc != scCommon && sh->sc != scSCommon)
907 goto case_stBlock_code; /* Lexical block */
908
909 type_code = TYPE_CODE_UNDEF; /* We have a type. */
910
911 /* Common code for handling struct, union, enum, and/or as-yet-
912 unknown-type blocks of info about structured data. `type_code'
913 has been set to the proper TYPE_CODE, if we know it. */
914 structured_common:
915 found_ecoff_debugging_info = 1;
916 push_parse_stack ();
917 top_stack->blocktype = stBlock;
918
919 /* First count the number of fields and the highest value. */
920 nfields = 0;
921 max_value = 0;
922 for (ext_tsym = ext_sh + external_sym_size;
923 ;
924 ext_tsym += external_sym_size)
925 {
926 SYMR tsym;
927
928 (*swap_sym_in) (cur_bfd, ext_tsym, &tsym);
929
930 switch (tsym.st)
931 {
932 case stEnd:
933 goto end_of_fields;
934
935 case stMember:
936 if (nfields == 0 && type_code == TYPE_CODE_UNDEF)
937 /* If the type of the member is Nil (or Void),
938 without qualifiers, assume the tag is an
939 enumeration. */
940 if (tsym.index == indexNil)
941 type_code = TYPE_CODE_ENUM;
942 else
943 {
944 (*debug_swap->swap_tir_in) (bigend,
945 &ax[tsym.index].a_ti,
946 &tir);
947 if ((tir.bt == btNil || tir.bt == btVoid)
948 && tir.tq0 == tqNil)
949 type_code = TYPE_CODE_ENUM;
950 }
951 nfields++;
952 if (tsym.value > max_value)
953 max_value = tsym.value;
954 break;
955
956 case stBlock:
957 case stUnion:
958 case stEnum:
959 case stStruct:
960 {
961 #if 0
962 /* This is a no-op; is it trying to tell us something
963 we should be checking? */
964 if (tsym.sc == scVariant); /*UNIMPLEMENTED*/
965 #endif
966 if (tsym.index != 0)
967 {
968 /* This is something like a struct within a
969 struct. Skip over the fields of the inner
970 struct. The -1 is because the for loop will
971 increment ext_tsym. */
972 ext_tsym = ((char *) debug_info->external_sym
973 + ((cur_fdr->isymBase + tsym.index - 1)
974 * external_sym_size));
975 }
976 }
977 break;
978
979 case stTypedef:
980 /* mips cc puts out a typedef for struct x if it is not yet
981 defined when it encounters
982 struct y { struct x *xp; };
983 Just ignore it. */
984 break;
985
986 case stIndirect:
987 /* Irix5 cc puts out a stIndirect for struct x if it is not
988 yet defined when it encounters
989 struct y { struct x *xp; };
990 Just ignore it. */
991 break;
992
993 default:
994 complain (&block_member_complaint, tsym.st);
995 }
996 }
997 end_of_fields:;
998
999 /* In an stBlock, there is no way to distinguish structs,
1000 unions, and enums at this point. This is a bug in the
1001 original design (that has been fixed with the recent
1002 addition of the stStruct, stUnion, and stEnum symbol
1003 types.) The way you can tell is if/when you see a variable
1004 or field of that type. In that case the variable's type
1005 (in the AUX table) says if the type is struct, union, or
1006 enum, and points back to the stBlock here. So you can
1007 patch the tag kind up later - but only if there actually is
1008 a variable or field of that type.
1009
1010 So until we know for sure, we will guess at this point.
1011 The heuristic is:
1012 If the first member has index==indexNil or a void type,
1013 assume we have an enumeration.
1014 Otherwise, if there is more than one member, and all
1015 the members have offset 0, assume we have a union.
1016 Otherwise, assume we have a struct.
1017
1018 The heuristic could guess wrong in the case of of an
1019 enumeration with no members or a union with one (or zero)
1020 members, or when all except the last field of a struct have
1021 width zero. These are uncommon and/or illegal situations,
1022 and in any case guessing wrong probably doesn't matter
1023 much.
1024
1025 But if we later do find out we were wrong, we fixup the tag
1026 kind. Members of an enumeration must be handled
1027 differently from struct/union fields, and that is harder to
1028 patch up, but luckily we shouldn't need to. (If there are
1029 any enumeration members, we can tell for sure it's an enum
1030 here.) */
1031
1032 if (type_code == TYPE_CODE_UNDEF)
1033 if (nfields > 1 && max_value == 0)
1034 type_code = TYPE_CODE_UNION;
1035 else
1036 type_code = TYPE_CODE_STRUCT;
1037
1038 /* Create a new type or use the pending type. */
1039 pend = is_pending_symbol (cur_fdr, ext_sh);
1040 if (pend == (struct mdebug_pending *) NULL)
1041 {
1042 t = new_type (NULL);
1043 add_pending (cur_fdr, ext_sh, t);
1044 }
1045 else
1046 t = pend->t;
1047
1048 /* Do not set the tag name if it is a compiler generated tag name
1049 (.Fxx or .xxfake or empty) for unnamed struct/union/enums.
1050 Alpha cc puts out an sh->iss of zero for those. */
1051 if (sh->iss == 0 || name[0] == '.' || name[0] == '\0')
1052 TYPE_TAG_NAME (t) = NULL;
1053 else
1054 TYPE_TAG_NAME (t) = obconcat (&current_objfile->symbol_obstack,
1055 "", "", name);
1056
1057 TYPE_CODE (t) = type_code;
1058 TYPE_LENGTH (t) = sh->value;
1059 TYPE_NFIELDS (t) = nfields;
1060 TYPE_FIELDS (t) = f = ((struct field *)
1061 TYPE_ALLOC (t,
1062 nfields * sizeof (struct field)));
1063
1064 if (type_code == TYPE_CODE_ENUM)
1065 {
1066 int unsigned_enum = 1;
1067
1068 /* This is a non-empty enum. */
1069
1070 /* DEC c89 has the number of enumerators in the sh.value field,
1071 not the type length, so we have to compensate for that
1072 incompatibility quirk.
1073 This might do the wrong thing for an enum with one or two
1074 enumerators and gcc -gcoff -fshort-enums, but these cases
1075 are hopefully rare enough.
1076 Alpha cc -migrate has a sh.value field of zero, we adjust
1077 that too. */
1078 if (TYPE_LENGTH (t) == TYPE_NFIELDS (t)
1079 || TYPE_LENGTH (t) == 0)
1080 TYPE_LENGTH (t) = TARGET_INT_BIT / HOST_CHAR_BIT;
1081 for (ext_tsym = ext_sh + external_sym_size;
1082 ;
1083 ext_tsym += external_sym_size)
1084 {
1085 SYMR tsym;
1086 struct symbol *enum_sym;
1087
1088 (*swap_sym_in) (cur_bfd, ext_tsym, &tsym);
1089
1090 if (tsym.st != stMember)
1091 break;
1092
1093 f->bitpos = tsym.value;
1094 f->type = t;
1095 f->name = debug_info->ss + cur_fdr->issBase + tsym.iss;
1096 f->bitsize = 0;
1097
1098 enum_sym = ((struct symbol *)
1099 obstack_alloc (&current_objfile->symbol_obstack,
1100 sizeof (struct symbol)));
1101 memset ((PTR) enum_sym, 0, sizeof (struct symbol));
1102 SYMBOL_NAME (enum_sym) = f->name;
1103 SYMBOL_CLASS (enum_sym) = LOC_CONST;
1104 SYMBOL_TYPE (enum_sym) = t;
1105 SYMBOL_NAMESPACE (enum_sym) = VAR_NAMESPACE;
1106 SYMBOL_VALUE (enum_sym) = tsym.value;
1107 if (SYMBOL_VALUE (enum_sym) < 0)
1108 unsigned_enum = 0;
1109 add_symbol (enum_sym, top_stack->cur_block);
1110
1111 /* Skip the stMembers that we've handled. */
1112 count++;
1113 f++;
1114 }
1115 if (unsigned_enum)
1116 TYPE_FLAGS (t) |= TYPE_FLAG_UNSIGNED;
1117 }
1118 /* make this the current type */
1119 top_stack->cur_type = t;
1120 top_stack->cur_field = 0;
1121
1122 /* Do not create a symbol for alpha cc unnamed structs. */
1123 if (sh->iss == 0)
1124 break;
1125
1126 /* gcc puts out an empty struct for an opaque struct definitions,
1127 do not create a symbol for it either. */
1128 if (TYPE_NFIELDS (t) == 0)
1129 {
1130 TYPE_FLAGS (t) |= TYPE_FLAG_STUB;
1131 break;
1132 }
1133
1134 s = new_symbol (name);
1135 SYMBOL_NAMESPACE (s) = STRUCT_NAMESPACE;
1136 SYMBOL_CLASS (s) = LOC_TYPEDEF;
1137 SYMBOL_VALUE (s) = 0;
1138 SYMBOL_TYPE (s) = t;
1139 add_symbol (s, top_stack->cur_block);
1140 break;
1141
1142 /* End of local variables shared by struct, union, enum, and
1143 block (as yet unknown struct/union/enum) processing. */
1144 }
1145
1146 case_stBlock_code:
1147 found_ecoff_debugging_info = 1;
1148 /* beginnning of (code) block. Value of symbol
1149 is the displacement from procedure start */
1150 push_parse_stack ();
1151
1152 /* Do not start a new block if this is the outermost block of a
1153 procedure. This allows the LOC_BLOCK symbol to point to the
1154 block with the local variables, so funcname::var works. */
1155 if (top_stack->blocktype == stProc
1156 || top_stack->blocktype == stStaticProc)
1157 {
1158 top_stack->blocktype = stNil;
1159 break;
1160 }
1161
1162 top_stack->blocktype = stBlock;
1163 b = new_block (top_stack->maxsyms);
1164 BLOCK_START (b) = sh->value + top_stack->procadr;
1165 BLOCK_SUPERBLOCK (b) = top_stack->cur_block;
1166 top_stack->cur_block = b;
1167 add_block (b, top_stack->cur_st);
1168 break;
1169
1170 case stEnd: /* end (of anything) */
1171 if (sh->sc == scInfo || sh->sc == scCommon || sh->sc == scSCommon)
1172 {
1173 /* Finished with type */
1174 top_stack->cur_type = 0;
1175 }
1176 else if (sh->sc == scText &&
1177 (top_stack->blocktype == stProc ||
1178 top_stack->blocktype == stStaticProc))
1179 {
1180 /* Finished with procedure */
1181 struct blockvector *bv = BLOCKVECTOR (top_stack->cur_st);
1182 struct mips_extra_func_info *e;
1183 struct block *b;
1184 struct type *ftype = top_stack->cur_type;
1185 int i;
1186
1187 BLOCK_END (top_stack->cur_block) += sh->value; /* size */
1188
1189 /* Make up special symbol to contain procedure specific info */
1190 s = new_symbol (MIPS_EFI_SYMBOL_NAME);
1191 SYMBOL_NAMESPACE (s) = LABEL_NAMESPACE;
1192 SYMBOL_CLASS (s) = LOC_CONST;
1193 SYMBOL_TYPE (s) = mdebug_type_void;
1194 e = ((struct mips_extra_func_info *)
1195 obstack_alloc (&current_objfile->symbol_obstack,
1196 sizeof (struct mips_extra_func_info)));
1197 memset ((PTR) e, 0, sizeof (struct mips_extra_func_info));
1198 SYMBOL_VALUE (s) = (long) e;
1199 e->numargs = top_stack->numargs;
1200 e->pdr.framereg = -1;
1201 add_symbol (s, top_stack->cur_block);
1202
1203 /* Reallocate symbols, saving memory */
1204 b = shrink_block (top_stack->cur_block, top_stack->cur_st);
1205
1206 /* f77 emits proc-level with address bounds==[0,0],
1207 So look for such child blocks, and patch them. */
1208 for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); i++)
1209 {
1210 struct block *b_bad = BLOCKVECTOR_BLOCK (bv, i);
1211 if (BLOCK_SUPERBLOCK (b_bad) == b
1212 && BLOCK_START (b_bad) == top_stack->procadr
1213 && BLOCK_END (b_bad) == top_stack->procadr)
1214 {
1215 BLOCK_START (b_bad) = BLOCK_START (b);
1216 BLOCK_END (b_bad) = BLOCK_END (b);
1217 }
1218 }
1219
1220 if (TYPE_NFIELDS (ftype) <= 0)
1221 {
1222 /* No parameter type information is recorded with the function's
1223 type. Set that from the type of the parameter symbols. */
1224 int nparams = top_stack->numargs;
1225 int iparams;
1226 struct symbol *sym;
1227
1228 if (nparams > 0)
1229 {
1230 TYPE_NFIELDS (ftype) = nparams;
1231 TYPE_FIELDS (ftype) = (struct field *)
1232 TYPE_ALLOC (ftype, nparams * sizeof (struct field));
1233
1234 for (i = iparams = 0; iparams < nparams; i++)
1235 {
1236 sym = BLOCK_SYM (b, i);
1237 switch (SYMBOL_CLASS (sym))
1238 {
1239 case LOC_ARG:
1240 case LOC_REF_ARG:
1241 case LOC_REGPARM:
1242 case LOC_REGPARM_ADDR:
1243 TYPE_FIELD_TYPE (ftype, iparams) = SYMBOL_TYPE (sym);
1244 iparams++;
1245 break;
1246 default:
1247 break;
1248 }
1249 }
1250 }
1251 }
1252 }
1253 else if (sh->sc == scText && top_stack->blocktype == stBlock)
1254 {
1255 /* End of (code) block. The value of the symbol is the
1256 displacement from the procedure`s start address of the
1257 end of this block. */
1258 BLOCK_END (top_stack->cur_block) = sh->value + top_stack->procadr;
1259 shrink_block (top_stack->cur_block, top_stack->cur_st);
1260 }
1261 else if (sh->sc == scText && top_stack->blocktype == stNil)
1262 {
1263 /* End of outermost block. Pop parse stack and ignore. The
1264 following stEnd of stProc will take care of the block. */
1265 ;
1266 }
1267 else if (sh->sc == scText && top_stack->blocktype == stFile)
1268 {
1269 /* End of file. Pop parse stack and ignore. Higher
1270 level code deals with this. */
1271 ;
1272 }
1273 else
1274 complain (&stEnd_complaint, sh->sc);
1275
1276 pop_parse_stack (); /* restore previous lexical context */
1277 break;
1278
1279 case stMember: /* member of struct or union */
1280 f = &TYPE_FIELDS (top_stack->cur_type)[top_stack->cur_field++];
1281 f->name = name;
1282 f->bitpos = sh->value;
1283 bitsize = 0;
1284 f->type = parse_type (cur_fd, ax, sh->index, &bitsize, bigend, name);
1285 f->bitsize = bitsize;
1286 break;
1287
1288 case stIndirect: /* forward declaration on Irix5 */
1289 /* Forward declarations from Irix5 cc are handled by cross_ref,
1290 skip them. */
1291 break;
1292
1293 case stTypedef: /* type definition */
1294 found_ecoff_debugging_info = 1;
1295
1296 /* Typedefs for forward declarations and opaque structs from alpha cc
1297 are handled by cross_ref, skip them. */
1298 if (sh->iss == 0)
1299 break;
1300
1301 /* Parse the type or use the pending type. */
1302 pend = is_pending_symbol (cur_fdr, ext_sh);
1303 if (pend == (struct mdebug_pending *) NULL)
1304 {
1305 t = parse_type (cur_fd, ax, sh->index, (int *)NULL, bigend, name);
1306 add_pending (cur_fdr, ext_sh, t);
1307 }
1308 else
1309 t = pend->t;
1310
1311 /* mips cc puts out a typedef with the name of the struct for forward
1312 declarations. These should not go into the symbol table and
1313 TYPE_NAME should not be set for them.
1314 They can't be distinguished from an intentional typedef to
1315 the same name however:
1316 x.h:
1317 struct x { int ix; int jx; };
1318 struct xx;
1319 x.c:
1320 typedef struct x x;
1321 struct xx {int ixx; int jxx; };
1322 generates a cross referencing stTypedef for x and xx.
1323 The user visible effect of this is that the type of a pointer
1324 to struct foo sometimes is given as `foo *' instead of `struct foo *'.
1325 The problem is fixed with alpha cc and Irix5 cc. */
1326
1327 /* However if the typedef cross references to an opaque aggregate, it
1328 is safe to omit it from the symbol table. */
1329
1330 if (has_opaque_xref (cur_fdr, sh))
1331 break;
1332 s = new_symbol (name);
1333 SYMBOL_NAMESPACE (s) = VAR_NAMESPACE;
1334 SYMBOL_CLASS (s) = LOC_TYPEDEF;
1335 SYMBOL_BLOCK_VALUE (s) = top_stack->cur_block;
1336 SYMBOL_TYPE (s) = t;
1337 add_symbol (s, top_stack->cur_block);
1338
1339 /* Incomplete definitions of structs should not get a name. */
1340 if (TYPE_NAME (SYMBOL_TYPE (s)) == NULL
1341 && (TYPE_NFIELDS (SYMBOL_TYPE (s)) != 0
1342 || (TYPE_CODE (SYMBOL_TYPE (s)) != TYPE_CODE_STRUCT
1343 && TYPE_CODE (SYMBOL_TYPE (s)) != TYPE_CODE_UNION)))
1344 {
1345 if (TYPE_CODE (SYMBOL_TYPE (s)) == TYPE_CODE_PTR
1346 || TYPE_CODE (SYMBOL_TYPE (s)) == TYPE_CODE_FUNC)
1347 {
1348 /* If we are giving a name to a type such as "pointer to
1349 foo" or "function returning foo", we better not set
1350 the TYPE_NAME. If the program contains "typedef char
1351 *caddr_t;", we don't want all variables of type char
1352 * to print as caddr_t. This is not just a
1353 consequence of GDB's type management; CC and GCC (at
1354 least through version 2.4) both output variables of
1355 either type char * or caddr_t with the type
1356 refering to the stTypedef symbol for caddr_t. If a future
1357 compiler cleans this up it GDB is not ready for it
1358 yet, but if it becomes ready we somehow need to
1359 disable this check (without breaking the PCC/GCC2.4
1360 case).
1361
1362 Sigh.
1363
1364 Fortunately, this check seems not to be necessary
1365 for anything except pointers or functions. */
1366 }
1367 else
1368 TYPE_NAME (SYMBOL_TYPE (s)) = SYMBOL_NAME (s);
1369 }
1370 break;
1371
1372 case stFile: /* file name */
1373 push_parse_stack ();
1374 top_stack->blocktype = sh->st;
1375 break;
1376
1377 /* I`ve never seen these for C */
1378 case stRegReloc:
1379 break; /* register relocation */
1380 case stForward:
1381 break; /* forwarding address */
1382 case stConstant:
1383 break; /* constant */
1384 default:
1385 complain (&unknown_mdebug_symtype_complaint, sh->st);
1386 break;
1387 }
1388
1389 return count;
1390 }
1391
1392 /* Parse the type information provided in the raw AX entries for
1393 the symbol SH. Return the bitfield size in BS, in case.
1394 We must byte-swap the AX entries before we use them; BIGEND says whether
1395 they are big-endian or little-endian (from fh->fBigendian). */
1396
1397 static struct type *
1398 parse_type (fd, ax, aux_index, bs, bigend, sym_name)
1399 int fd;
1400 union aux_ext *ax;
1401 unsigned int aux_index;
1402 int *bs;
1403 int bigend;
1404 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 complain (&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 complain (&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 complain (&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
1519 /* Inhibit core dumps with some cfront generated objects that
1520 corrupt the TIR. */
1521 if (bs == (int *)NULL)
1522 {
1523 /* Alpha cc -migrate encodes char and unsigned char types
1524 as short and unsigned short types with a field width of 8.
1525 Enum types also have a field width which we ignore for now. */
1526 if (t->bt == btShort && width == 8)
1527 tp = mdebug_type_char;
1528 else if (t->bt == btUShort && width == 8)
1529 tp = mdebug_type_unsigned_char;
1530 else if (t->bt == btEnum)
1531 ;
1532 else
1533 complain (&bad_fbitfield_complaint, sym_name);
1534 }
1535 else
1536 *bs = width;
1537 ax++;
1538 }
1539
1540 /* A btIndirect entry cross references to an aux entry containing
1541 the type. */
1542 if (t->bt == btIndirect)
1543 {
1544 RNDXR rn[1];
1545 int rf;
1546 FDR *xref_fh;
1547 int xref_fd;
1548
1549 (*debug_swap->swap_rndx_in) (bigend, &ax->a_rndx, rn);
1550 ax++;
1551 if (rn->rfd == 0xfff)
1552 {
1553 rf = AUX_GET_ISYM (bigend, ax);
1554 ax++;
1555 }
1556 else
1557 rf = rn->rfd;
1558
1559 if (rf == -1)
1560 {
1561 complain (&bad_indirect_xref_complaint, 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 = tp->target_type;
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 complain (&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 complain (&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 || !STREQ (TYPE_TAG_NAME (tp), name))
1629 TYPE_TAG_NAME (tp) = obsavestring (name, strlen (name),
1630 &current_objfile->type_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 complain (&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 complain (&bad_tag_guess_complaint, sym_name);
1661 TYPE_CODE (tp) = type_code;
1662 }
1663 if (TYPE_NAME (tp) == NULL || !STREQ (TYPE_NAME (tp), name))
1664 TYPE_NAME (tp) = obsavestring (name, strlen (name),
1665 &current_objfile->type_obstack);
1666 }
1667 }
1668 if (t->bt == btTypedef)
1669 {
1670 char *name;
1671
1672 /* Try to cross reference this type, it should succeed. */
1673 ax += cross_ref (fd, ax, &tp, type_code, &name, bigend, sym_name);
1674 if (tp == (struct type *) NULL)
1675 {
1676 complain (&unable_to_cross_ref_complaint, sym_name);
1677 tp = mdebug_type_int;
1678 }
1679 }
1680
1681 /* Deal with range types */
1682 if (t->bt == btRange)
1683 {
1684 TYPE_NFIELDS (tp) = 2;
1685 TYPE_FIELDS (tp) = ((struct field *)
1686 TYPE_ALLOC (tp, 2 * sizeof (struct field)));
1687 TYPE_FIELD_NAME (tp, 0) = obsavestring ("Low", strlen ("Low"),
1688 &current_objfile->type_obstack);
1689 TYPE_FIELD_BITPOS (tp, 0) = AUX_GET_DNLOW (bigend, ax);
1690 ax++;
1691 TYPE_FIELD_NAME (tp, 1) = obsavestring ("High", strlen ("High"),
1692 &current_objfile->type_obstack);
1693 TYPE_FIELD_BITPOS (tp, 1) = AUX_GET_DNHIGH (bigend, ax);
1694 ax++;
1695 }
1696
1697 /* Parse all the type qualifiers now. If there are more
1698 than 6 the game will continue in the next aux */
1699
1700 while (1)
1701 {
1702 #define PARSE_TQ(tq) \
1703 if (t->tq != tqNil) \
1704 ax += upgrade_type(fd, &tp, t->tq, ax, bigend, sym_name); \
1705 else \
1706 break;
1707
1708 PARSE_TQ (tq0);
1709 PARSE_TQ (tq1);
1710 PARSE_TQ (tq2);
1711 PARSE_TQ (tq3);
1712 PARSE_TQ (tq4);
1713 PARSE_TQ (tq5);
1714 #undef PARSE_TQ
1715
1716 /* mips cc 2.x and gcc never put out continued aux entries. */
1717 if (!t->continued)
1718 break;
1719
1720 (*debug_swap->swap_tir_in) (bigend, &ax->a_ti, t);
1721 ax++;
1722 }
1723
1724 /* Complain for illegal continuations due to corrupt aux entries. */
1725 if (t->continued)
1726 complain (&bad_continued_complaint, sym_name);
1727
1728 return tp;
1729 }
1730
1731 /* Make up a complex type from a basic one. Type is passed by
1732 reference in TPP and side-effected as necessary. The type
1733 qualifier TQ says how to handle the aux symbols at AX for
1734 the symbol SX we are currently analyzing. BIGEND says whether
1735 aux symbols are big-endian or little-endian.
1736 Returns the number of aux symbols we parsed. */
1737
1738 static int
1739 upgrade_type (fd, tpp, tq, ax, bigend, sym_name)
1740 int fd;
1741 struct type **tpp;
1742 int tq;
1743 union aux_ext *ax;
1744 int bigend;
1745 char *sym_name;
1746 {
1747 int off;
1748 struct type *t;
1749
1750 /* Used in array processing */
1751 int rf, id;
1752 FDR *fh;
1753 struct type *range;
1754 struct type *indx;
1755 int lower, upper;
1756 RNDXR rndx;
1757
1758 switch (tq)
1759 {
1760 case tqPtr:
1761 t = lookup_pointer_type (*tpp);
1762 *tpp = t;
1763 return 0;
1764
1765 case tqProc:
1766 t = lookup_function_type (*tpp);
1767 *tpp = t;
1768 return 0;
1769
1770 case tqArray:
1771 off = 0;
1772
1773 /* Determine and record the domain type (type of index) */
1774 (*debug_swap->swap_rndx_in) (bigend, &ax->a_rndx, &rndx);
1775 id = rndx.index;
1776 rf = rndx.rfd;
1777 if (rf == 0xfff)
1778 {
1779 ax++;
1780 rf = AUX_GET_ISYM (bigend, ax);
1781 off++;
1782 }
1783 fh = get_rfd (fd, rf);
1784
1785 indx = parse_type (fd, debug_info->external_aux + fh->iauxBase,
1786 id, (int *) NULL, bigend, sym_name);
1787
1788 /* The bounds type should be an integer type, but might be anything
1789 else due to corrupt aux entries. */
1790 if (TYPE_CODE (indx) != TYPE_CODE_INT)
1791 {
1792 complain (&array_index_type_complaint, sym_name);
1793 indx = mdebug_type_int;
1794 }
1795
1796 /* Get the bounds, and create the array type. */
1797 ax++;
1798 lower = AUX_GET_DNLOW (bigend, ax);
1799 ax++;
1800 upper = AUX_GET_DNHIGH (bigend, ax);
1801 ax++;
1802 rf = AUX_GET_WIDTH (bigend, ax); /* bit size of array element */
1803
1804 range = create_range_type ((struct type *) NULL, indx,
1805 lower, upper);
1806
1807 t = create_array_type ((struct type *) NULL, *tpp, range);
1808
1809 /* We used to fill in the supplied array element bitsize
1810 here if the TYPE_LENGTH of the target type was zero.
1811 This happens for a `pointer to an array of anonymous structs',
1812 but in this case the array element bitsize is also zero,
1813 so nothing is gained.
1814 And we used to check the TYPE_LENGTH of the target type against
1815 the supplied array element bitsize.
1816 gcc causes a mismatch for `pointer to array of object',
1817 since the sdb directives it uses do not have a way of
1818 specifying the bitsize, but it does no harm (the
1819 TYPE_LENGTH should be correct) and we should be able to
1820 ignore the erroneous bitsize from the auxiliary entry safely.
1821 dbx seems to ignore it too. */
1822
1823 /* TYPE_FLAG_TARGET_STUB now takes care of the zero TYPE_LENGTH
1824 problem. */
1825 if (TYPE_LENGTH (*tpp) == 0)
1826 {
1827 TYPE_FLAGS (t) |= TYPE_FLAG_TARGET_STUB;
1828 }
1829
1830 *tpp = t;
1831 return 4 + off;
1832
1833 case tqVol:
1834 /* Volatile -- currently ignored */
1835 return 0;
1836
1837 case tqConst:
1838 /* Const -- currently ignored */
1839 return 0;
1840
1841 default:
1842 complain (&unknown_type_qual_complaint, tq);
1843 return 0;
1844 }
1845 }
1846
1847
1848 /* Parse a procedure descriptor record PR. Note that the procedure is
1849 parsed _after_ the local symbols, now we just insert the extra
1850 information we need into a MIPS_EFI_SYMBOL_NAME symbol that has
1851 already been placed in the procedure's main block. Note also that
1852 images that have been partially stripped (ld -x) have been deprived
1853 of local symbols, and we have to cope with them here. FIRST_OFF is
1854 the offset of the first procedure for this FDR; we adjust the
1855 address by this amount, but I don't know why. SEARCH_SYMTAB is the symtab
1856 to look for the function which contains the MIPS_EFI_SYMBOL_NAME symbol
1857 in question, or NULL to use top_stack->cur_block. */
1858
1859 static void parse_procedure PARAMS ((PDR *, struct symtab *, unsigned long,
1860 struct partial_symtab *));
1861
1862 static void
1863 parse_procedure (pr, search_symtab, first_off, pst)
1864 PDR *pr;
1865 struct symtab *search_symtab;
1866 unsigned long first_off;
1867 struct partial_symtab *pst;
1868 {
1869 struct symbol *s, *i;
1870 struct block *b;
1871 struct mips_extra_func_info *e;
1872 char *sh_name;
1873
1874 /* Simple rule to find files linked "-x" */
1875 if (cur_fdr->rss == -1)
1876 {
1877 if (pr->isym == -1)
1878 {
1879 /* Static procedure at address pr->adr. Sigh. */
1880 /* FIXME-32x64. assuming pr->adr fits in long. */
1881 complain (&pdr_static_symbol_complaint, (unsigned long) pr->adr);
1882 return;
1883 }
1884 else
1885 {
1886 /* external */
1887 EXTR she;
1888
1889 (*debug_swap->swap_ext_in) (cur_bfd,
1890 ((char *) debug_info->external_ext
1891 + (pr->isym
1892 * debug_swap->external_ext_size)),
1893 &she);
1894 sh_name = debug_info->ssext + she.asym.iss;
1895 }
1896 }
1897 else
1898 {
1899 /* Full symbols */
1900 SYMR sh;
1901
1902 (*debug_swap->swap_sym_in) (cur_bfd,
1903 ((char *) debug_info->external_sym
1904 + ((cur_fdr->isymBase + pr->isym)
1905 * debug_swap->external_sym_size)),
1906 &sh);
1907 sh_name = debug_info->ss + cur_fdr->issBase + sh.iss;
1908 }
1909
1910 if (search_symtab != NULL)
1911 {
1912 #if 0
1913 /* This loses both in the case mentioned (want a static, find a global),
1914 but also if we are looking up a non-mangled name which happens to
1915 match the name of a mangled function. */
1916 /* We have to save the cur_fdr across the call to lookup_symbol.
1917 If the pdr is for a static function and if a global function with
1918 the same name exists, lookup_symbol will eventually read in the symtab
1919 for the global function and clobber cur_fdr. */
1920 FDR *save_cur_fdr = cur_fdr;
1921 s = lookup_symbol (sh_name, NULL, VAR_NAMESPACE, 0, NULL);
1922 cur_fdr = save_cur_fdr;
1923 #else
1924 s = mylookup_symbol
1925 (sh_name,
1926 BLOCKVECTOR_BLOCK (BLOCKVECTOR (search_symtab), STATIC_BLOCK),
1927 VAR_NAMESPACE,
1928 LOC_BLOCK);
1929 #endif
1930 }
1931 else
1932 s = mylookup_symbol (sh_name, top_stack->cur_block,
1933 VAR_NAMESPACE, LOC_BLOCK);
1934
1935 if (s != 0)
1936 {
1937 b = SYMBOL_BLOCK_VALUE (s);
1938 }
1939 else
1940 {
1941 complain (&pdr_for_nonsymbol_complaint, sh_name);
1942 #if 1
1943 return;
1944 #else
1945 /* FIXME -- delete. We can't do symbol allocation now; it's all done. */
1946 s = new_symbol (sh_name);
1947 SYMBOL_NAMESPACE (s) = VAR_NAMESPACE;
1948 SYMBOL_CLASS (s) = LOC_BLOCK;
1949 /* Donno its type, hope int is ok */
1950 SYMBOL_TYPE (s) = lookup_function_type (mdebug_type_int);
1951 add_symbol (s, top_stack->cur_block);
1952 /* Wont have symbols for this one */
1953 b = new_block (2);
1954 SYMBOL_BLOCK_VALUE (s) = b;
1955 BLOCK_FUNCTION (b) = s;
1956 BLOCK_START (b) = pr->adr;
1957 /* BOUND used to be the end of procedure's text, but the
1958 argument is no longer passed in. */
1959 BLOCK_END (b) = bound;
1960 BLOCK_SUPERBLOCK (b) = top_stack->cur_block;
1961 add_block (b, top_stack->cur_st);
1962 #endif
1963 }
1964
1965 i = mylookup_symbol (MIPS_EFI_SYMBOL_NAME, b, LABEL_NAMESPACE, LOC_CONST);
1966
1967 if (i)
1968 {
1969 e = (struct mips_extra_func_info *) SYMBOL_VALUE (i);
1970 e->pdr = *pr;
1971 e->pdr.isym = (long) s;
1972 e->pdr.adr += pst->textlow - first_off;
1973
1974 /* Correct incorrect setjmp procedure descriptor from the library
1975 to make backtrace through setjmp work. */
1976 if (e->pdr.pcreg == 0 && STREQ (sh_name, "setjmp"))
1977 {
1978 complain (&bad_setjmp_pdr_complaint, 0);
1979 e->pdr.pcreg = RA_REGNUM;
1980 e->pdr.regmask = 0x80000000;
1981 e->pdr.regoffset = -4;
1982 }
1983 }
1984
1985 /* It would be reasonable that functions that have been compiled
1986 without debugging info have a btNil type for their return value,
1987 and functions that are void and are compiled with debugging info
1988 have btVoid.
1989 gcc and DEC f77 put out btNil types for both cases, so btNil is mapped
1990 to TYPE_CODE_VOID in parse_type to get the `compiled with debugging info'
1991 case right.
1992 The glevel field in cur_fdr could be used to determine the presence
1993 of debugging info, but GCC doesn't always pass the -g switch settings
1994 to the assembler and GAS doesn't set the glevel field from the -g switch
1995 settings.
1996 To work around these problems, the return value type of a TYPE_CODE_VOID
1997 function is adjusted accordingly if no debugging info was found in the
1998 compilation unit. */
1999
2000 if (processing_gcc_compilation == 0
2001 && found_ecoff_debugging_info == 0
2002 && TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (s))) == TYPE_CODE_VOID)
2003 SYMBOL_TYPE (s) = nodebug_func_symbol_type;
2004 }
2005
2006 /* Relocate the extra function info pointed to by the symbol table. */
2007
2008 void
2009 ecoff_relocate_efi (sym, delta)
2010 struct symbol *sym;
2011 CORE_ADDR delta;
2012 {
2013 struct mips_extra_func_info *e;
2014
2015 e = (struct mips_extra_func_info *) SYMBOL_VALUE (sym);
2016
2017 e->pdr.adr += delta;
2018 }
2019
2020 /* Parse the external symbol ES. Just call parse_symbol() after
2021 making sure we know where the aux are for it.
2022 BIGEND says whether aux entries are big-endian or little-endian.
2023
2024 This routine clobbers top_stack->cur_block and ->cur_st. */
2025
2026 static void parse_external PARAMS ((EXTR *, int, struct section_offsets *));
2027
2028 static void
2029 parse_external (es, bigend, section_offsets)
2030 EXTR *es;
2031 int bigend;
2032 struct section_offsets *section_offsets;
2033 {
2034 union aux_ext *ax;
2035
2036 if (es->ifd != ifdNil)
2037 {
2038 cur_fd = es->ifd;
2039 cur_fdr = debug_info->fdr + cur_fd;
2040 ax = debug_info->external_aux + cur_fdr->iauxBase;
2041 }
2042 else
2043 {
2044 cur_fdr = debug_info->fdr;
2045 ax = 0;
2046 }
2047
2048 /* Reading .o files */
2049 if (es->asym.sc == scUndefined || es->asym.sc == scNil)
2050 {
2051 char *what;
2052 switch (es->asym.st)
2053 {
2054 case stNil:
2055 /* These are generated for static symbols in .o files,
2056 ignore them. */
2057 return;
2058 case stStaticProc:
2059 case stProc:
2060 what = "procedure";
2061 n_undef_procs++;
2062 break;
2063 case stGlobal:
2064 what = "variable";
2065 n_undef_vars++;
2066 break;
2067 case stLabel:
2068 what = "label";
2069 n_undef_labels++;
2070 break;
2071 default:
2072 what = "symbol";
2073 break;
2074 }
2075 n_undef_symbols++;
2076 /* FIXME: Turn this into a complaint? */
2077 if (info_verbose)
2078 printf_filtered ("Warning: %s `%s' is undefined (in %s)\n",
2079 what, debug_info->ssext + es->asym.iss,
2080 fdr_name (cur_fdr));
2081 return;
2082 }
2083
2084 switch (es->asym.st)
2085 {
2086 case stProc:
2087 case stStaticProc:
2088 /* There is no need to parse the external procedure symbols.
2089 If they are from objects compiled without -g, their index will
2090 be indexNil, and the symbol definition from the minimal symbol
2091 is preferrable (yielding a function returning int instead of int).
2092 If the index points to a local procedure symbol, the local
2093 symbol already provides the correct type.
2094 Note that the index of the external procedure symbol points
2095 to the local procedure symbol in the local symbol table, and
2096 _not_ to the auxiliary symbol info. */
2097 break;
2098 case stGlobal:
2099 case stLabel:
2100 /* Global common symbols are resolved by the runtime loader,
2101 ignore them. */
2102 if (es->asym.sc == scCommon || es->asym.sc == scSCommon)
2103 break;
2104
2105 /* Note that the case of a symbol with indexNil must be handled
2106 anyways by parse_symbol(). */
2107 parse_symbol (&es->asym, ax, (char *) NULL, bigend, section_offsets);
2108 break;
2109 default:
2110 break;
2111 }
2112 }
2113
2114 /* Parse the line number info for file descriptor FH into
2115 GDB's linetable LT. MIPS' encoding requires a little bit
2116 of magic to get things out. Note also that MIPS' line
2117 numbers can go back and forth, apparently we can live
2118 with that and do not need to reorder our linetables */
2119
2120 static void parse_lines PARAMS ((FDR *, PDR *, struct linetable *, int,
2121 struct partial_symtab *));
2122
2123 static void
2124 parse_lines (fh, pr, lt, maxlines, pst)
2125 FDR *fh;
2126 PDR *pr;
2127 struct linetable *lt;
2128 int maxlines;
2129 struct partial_symtab *pst;
2130 {
2131 unsigned char *base;
2132 int j, k;
2133 int delta, count, lineno = 0;
2134 unsigned long first_off = pr->adr;
2135
2136 if (fh->cbLine == 0)
2137 return;
2138
2139 /* Scan by procedure descriptors */
2140 k = 0;
2141 for (j = 0; j < fh->cpd; j++, pr++)
2142 {
2143 long l;
2144 unsigned long adr;
2145 unsigned char *halt;
2146
2147 /* No code for this one */
2148 if (pr->iline == ilineNil ||
2149 pr->lnLow == -1 || pr->lnHigh == -1)
2150 continue;
2151
2152 /* Determine start and end address of compressed line bytes for
2153 this procedure. */
2154 base = debug_info->line + fh->cbLineOffset;
2155 if (j != (fh->cpd - 1))
2156 halt = base + pr[1].cbLineOffset;
2157 else
2158 halt = base + fh->cbLine;
2159 base += pr->cbLineOffset;
2160
2161 adr = pst->textlow + pr->adr - first_off;
2162
2163 l = adr >> 2; /* in words */
2164 for (lineno = pr->lnLow; base < halt; )
2165 {
2166 count = *base & 0x0f;
2167 delta = *base++ >> 4;
2168 if (delta >= 8)
2169 delta -= 16;
2170 if (delta == -8)
2171 {
2172 delta = (base[0] << 8) | base[1];
2173 if (delta >= 0x8000)
2174 delta -= 0x10000;
2175 base += 2;
2176 }
2177 lineno += delta; /* first delta is 0 */
2178
2179 /* Complain if the line table overflows. Could happen
2180 with corrupt binaries. */
2181 if (lt->nitems >= maxlines)
2182 {
2183 complain (&bad_linetable_guess_complaint, fdr_name (fh));
2184 break;
2185 }
2186 k = add_line (lt, lineno, l, k);
2187 l += count + 1;
2188 }
2189 }
2190 }
2191 \f
2192 /* Master parsing procedure for first-pass reading of file symbols
2193 into a partial_symtab. */
2194
2195 static void
2196 parse_partial_symbols (objfile, section_offsets)
2197 struct objfile *objfile;
2198 struct section_offsets *section_offsets;
2199 {
2200 const bfd_size_type external_sym_size = debug_swap->external_sym_size;
2201 const bfd_size_type external_rfd_size = debug_swap->external_rfd_size;
2202 const bfd_size_type external_ext_size = debug_swap->external_ext_size;
2203 void (* const swap_ext_in) PARAMS ((bfd *, PTR, EXTR *))
2204 = debug_swap->swap_ext_in;
2205 void (* const swap_sym_in) PARAMS ((bfd *, PTR, SYMR *))
2206 = debug_swap->swap_sym_in;
2207 void (* const swap_rfd_in) PARAMS ((bfd *, PTR, RFDT *))
2208 = debug_swap->swap_rfd_in;
2209 int f_idx, s_idx;
2210 HDRR *hdr = &debug_info->symbolic_header;
2211 /* Running pointers */
2212 FDR *fh;
2213 char *ext_out;
2214 char *ext_out_end;
2215 EXTR *ext_block;
2216 register EXTR *ext_in;
2217 EXTR *ext_in_end;
2218 SYMR sh;
2219 struct partial_symtab *pst;
2220
2221 int past_first_source_file = 0;
2222
2223 /* List of current psymtab's include files */
2224 char **psymtab_include_list;
2225 int includes_allocated;
2226 int includes_used;
2227 EXTR *extern_tab;
2228 struct pst_map *fdr_to_pst;
2229 /* Index within current psymtab dependency list */
2230 struct partial_symtab **dependency_list;
2231 int dependencies_used, dependencies_allocated;
2232 struct cleanup *old_chain;
2233 char *name;
2234 enum language prev_language;
2235 asection *text_sect;
2236 int relocatable = 0;
2237
2238 /* Irix 5.2 shared libraries have a fh->adr field of zero, but
2239 the shared libraries are prelinked at a high memory address.
2240 We have to adjust the start address of the object file for this case,
2241 by setting it to the start address of the first procedure in the file.
2242 But we should do no adjustments if we are debugging a .o file, where
2243 the text section (and fh->adr) really starts at zero. */
2244 text_sect = bfd_get_section_by_name (cur_bfd, ".text");
2245 if (text_sect != NULL
2246 && (bfd_get_section_flags (cur_bfd, text_sect) & SEC_RELOC))
2247 relocatable = 1;
2248
2249 extern_tab = (EXTR *) obstack_alloc (&objfile->psymbol_obstack,
2250 sizeof (EXTR) * hdr->iextMax);
2251
2252 includes_allocated = 30;
2253 includes_used = 0;
2254 psymtab_include_list = (char **) alloca (includes_allocated *
2255 sizeof (char *));
2256 next_symbol_text_func = mdebug_next_symbol_text;
2257
2258 dependencies_allocated = 30;
2259 dependencies_used = 0;
2260 dependency_list =
2261 (struct partial_symtab **) alloca (dependencies_allocated *
2262 sizeof (struct partial_symtab *));
2263
2264 last_source_file = NULL;
2265
2266 /*
2267 * Big plan:
2268 *
2269 * Only parse the Local and External symbols, and the Relative FDR.
2270 * Fixup enough of the loader symtab to be able to use it.
2271 * Allocate space only for the file's portions we need to
2272 * look at. (XXX)
2273 */
2274
2275 max_gdbinfo = 0;
2276 max_glevel = MIN_GLEVEL;
2277
2278 /* Allocate the map FDR -> PST.
2279 Minor hack: -O3 images might claim some global data belongs
2280 to FDR -1. We`ll go along with that */
2281 fdr_to_pst = (struct pst_map *) xzalloc ((hdr->ifdMax + 1) * sizeof *fdr_to_pst);
2282 old_chain = make_cleanup (free, fdr_to_pst);
2283 fdr_to_pst++;
2284 {
2285 struct partial_symtab *pst = new_psymtab ("", objfile, section_offsets);
2286 fdr_to_pst[-1].pst = pst;
2287 FDR_IDX (pst) = -1;
2288 }
2289
2290 /* Allocate the global pending list. */
2291 pending_list =
2292 ((struct mdebug_pending **)
2293 obstack_alloc (&objfile->psymbol_obstack,
2294 hdr->ifdMax * sizeof (struct mdebug_pending *)));
2295 memset ((PTR) pending_list, 0,
2296 hdr->ifdMax * sizeof (struct mdebug_pending *));
2297
2298 /* Pass 0 over external syms: swap them in. */
2299 ext_block = (EXTR *) xmalloc (hdr->iextMax * sizeof (EXTR));
2300 make_cleanup (free, ext_block);
2301
2302 ext_out = (char *) debug_info->external_ext;
2303 ext_out_end = ext_out + hdr->iextMax * external_ext_size;
2304 ext_in = ext_block;
2305 for (; ext_out < ext_out_end; ext_out += external_ext_size, ext_in++)
2306 (*swap_ext_in) (cur_bfd, ext_out, ext_in);
2307
2308 /* Pass 1 over external syms: Presize and partition the list */
2309 ext_in = ext_block;
2310 ext_in_end = ext_in + hdr->iextMax;
2311 for (; ext_in < ext_in_end; ext_in++)
2312 {
2313 /* See calls to complain below. */
2314 if (ext_in->ifd >= -1
2315 && ext_in->ifd < hdr->ifdMax
2316 && ext_in->asym.iss >= 0
2317 && ext_in->asym.iss < hdr->issExtMax)
2318 fdr_to_pst[ext_in->ifd].n_globals++;
2319 }
2320
2321 /* Pass 1.5 over files: partition out global symbol space */
2322 s_idx = 0;
2323 for (f_idx = -1; f_idx < hdr->ifdMax; f_idx++)
2324 {
2325 fdr_to_pst[f_idx].globals_offset = s_idx;
2326 s_idx += fdr_to_pst[f_idx].n_globals;
2327 fdr_to_pst[f_idx].n_globals = 0;
2328 }
2329
2330 /* Pass 2 over external syms: fill in external symbols */
2331 ext_in = ext_block;
2332 ext_in_end = ext_in + hdr->iextMax;
2333 for (; ext_in < ext_in_end; ext_in++)
2334 {
2335 enum minimal_symbol_type ms_type = mst_text;
2336 CORE_ADDR svalue = ext_in->asym.value;
2337
2338 /* The Irix 5 native tools seem to sometimes generate bogus
2339 external symbols. */
2340 if (ext_in->ifd < -1 || ext_in->ifd >= hdr->ifdMax)
2341 {
2342 complain (&bad_ext_ifd_complaint, ext_in->ifd, hdr->ifdMax);
2343 continue;
2344 }
2345 if (ext_in->asym.iss < 0 || ext_in->asym.iss >= hdr->issExtMax)
2346 {
2347 complain (&bad_ext_iss_complaint, ext_in->asym.iss,
2348 hdr->issExtMax);
2349 continue;
2350 }
2351
2352 extern_tab[fdr_to_pst[ext_in->ifd].globals_offset
2353 + fdr_to_pst[ext_in->ifd].n_globals++] = *ext_in;
2354
2355 if (ext_in->asym.sc == scUndefined || ext_in->asym.sc == scNil)
2356 continue;
2357
2358 name = debug_info->ssext + ext_in->asym.iss;
2359 switch (ext_in->asym.st)
2360 {
2361 case stProc:
2362 svalue += ANOFFSET (section_offsets, SECT_OFF_TEXT);
2363 break;
2364 case stStaticProc:
2365 ms_type = mst_file_text;
2366 svalue += ANOFFSET (section_offsets, SECT_OFF_TEXT);
2367 break;
2368 case stGlobal:
2369 if (ext_in->asym.sc == scCommon || ext_in->asym.sc == scSCommon)
2370 {
2371 /* The value of a common symbol is its size, not its address.
2372 Ignore it. */
2373 continue;
2374 }
2375 else if (ext_in->asym.sc == scData
2376 || ext_in->asym.sc == scSData
2377 || ext_in->asym.sc == scRData
2378 || ext_in->asym.sc == scPData
2379 || ext_in->asym.sc == scXData)
2380 {
2381 ms_type = mst_data;
2382 svalue += ANOFFSET (section_offsets, SECT_OFF_DATA);
2383 }
2384 else
2385 {
2386 ms_type = mst_bss;
2387 svalue += ANOFFSET (section_offsets, SECT_OFF_BSS);
2388 }
2389 break;
2390 case stLabel:
2391 if (ext_in->asym.sc == scAbs)
2392 ms_type = mst_abs;
2393 else if (ext_in->asym.sc == scText
2394 || ext_in->asym.sc == scInit
2395 || ext_in->asym.sc == scFini)
2396 {
2397 ms_type = mst_file_text;
2398 svalue += ANOFFSET (section_offsets, SECT_OFF_TEXT);
2399 }
2400 else if (ext_in->asym.sc == scData
2401 || ext_in->asym.sc == scSData
2402 || ext_in->asym.sc == scRData
2403 || ext_in->asym.sc == scPData
2404 || ext_in->asym.sc == scXData)
2405 {
2406 ms_type = mst_file_data;
2407 svalue += ANOFFSET (section_offsets, SECT_OFF_DATA);
2408 }
2409 else
2410 {
2411 ms_type = mst_file_bss;
2412 svalue += ANOFFSET (section_offsets, SECT_OFF_BSS);
2413 }
2414 break;
2415 case stLocal:
2416 /* The alpha has the section start addresses in stLocal symbols
2417 whose name starts with a `.'. Skip those but complain for all
2418 other stLocal symbols. */
2419 if (name[0] == '.')
2420 continue;
2421 /* Fall through. */
2422 default:
2423 ms_type = mst_unknown;
2424 complain (&unknown_ext_complaint, name);
2425 }
2426 prim_record_minimal_symbol (name, svalue, ms_type, objfile);
2427 }
2428
2429 /* Pass 3 over files, over local syms: fill in static symbols */
2430 for (f_idx = 0; f_idx < hdr->ifdMax; f_idx++)
2431 {
2432 struct partial_symtab *save_pst;
2433 EXTR *ext_ptr;
2434 CORE_ADDR textlow;
2435
2436 cur_fdr = fh = debug_info->fdr + f_idx;
2437
2438 if (fh->csym == 0)
2439 {
2440 fdr_to_pst[f_idx].pst = NULL;
2441 continue;
2442 }
2443
2444 /* Determine the start address for this object file from the
2445 file header and relocate it, except for Irix 5.2 zero fh->adr. */
2446 if (fh->cpd)
2447 {
2448 textlow = fh->adr;
2449 if (relocatable || textlow != 0)
2450 textlow += ANOFFSET (section_offsets, SECT_OFF_TEXT);
2451 }
2452 else
2453 textlow = 0;
2454 pst = start_psymtab_common (objfile, section_offsets,
2455 fdr_name (fh),
2456 textlow,
2457 objfile->global_psymbols.next,
2458 objfile->static_psymbols.next);
2459 pst->read_symtab_private = ((char *)
2460 obstack_alloc (&objfile->psymbol_obstack,
2461 sizeof (struct symloc)));
2462 memset ((PTR) pst->read_symtab_private, 0, sizeof (struct symloc));
2463
2464 save_pst = pst;
2465 FDR_IDX (pst) = f_idx;
2466 CUR_BFD (pst) = cur_bfd;
2467 DEBUG_SWAP (pst) = debug_swap;
2468 DEBUG_INFO (pst) = debug_info;
2469 PENDING_LIST (pst) = pending_list;
2470
2471 /* The way to turn this into a symtab is to call... */
2472 pst->read_symtab = mdebug_psymtab_to_symtab;
2473
2474 /* Set up language for the pst.
2475 The language from the FDR is used if it is unambigious (e.g. cfront
2476 with native cc and g++ will set the language to C).
2477 Otherwise we have to deduce the language from the filename.
2478 Native ecoff has every header file in a separate FDR, so
2479 deduce_language_from_filename will return language_unknown for
2480 a header file, which is not what we want.
2481 But the FDRs for the header files are after the FDR for the source
2482 file, so we can assign the language of the source file to the
2483 following header files. Then we save the language in the private
2484 pst data so that we can reuse it when building symtabs. */
2485 prev_language = psymtab_language;
2486
2487 switch (fh->lang)
2488 {
2489 case langCplusplusV2:
2490 psymtab_language = language_cplus;
2491 break;
2492 default:
2493 psymtab_language = deduce_language_from_filename (fdr_name (fh));
2494 break;
2495 }
2496 if (psymtab_language == language_unknown)
2497 psymtab_language = prev_language;
2498 PST_PRIVATE (pst)->pst_language = psymtab_language;
2499
2500 pst->texthigh = pst->textlow;
2501
2502 /* For stabs-in-ecoff files, the second symbol must be @stab.
2503 This symbol is emitted by mips-tfile to signal that the
2504 current object file uses encapsulated stabs instead of mips
2505 ecoff for local symbols. (It is the second symbol because
2506 the first symbol is the stFile used to signal the start of a
2507 file). */
2508 processing_gcc_compilation = 0;
2509 if (fh->csym >= 2)
2510 {
2511 (*swap_sym_in) (cur_bfd,
2512 ((char *) debug_info->external_sym
2513 + (fh->isymBase + 1) * external_sym_size),
2514 &sh);
2515 if (STREQ (debug_info->ss + fh->issBase + sh.iss, stabs_symbol))
2516 processing_gcc_compilation = 2;
2517 }
2518
2519 if (processing_gcc_compilation != 0)
2520 {
2521 for (cur_sdx = 2; cur_sdx < fh->csym; cur_sdx++)
2522 {
2523 int type_code;
2524 char *namestring;
2525
2526 (*swap_sym_in) (cur_bfd,
2527 (((char *) debug_info->external_sym)
2528 + (fh->isymBase + cur_sdx) * external_sym_size),
2529 &sh);
2530 type_code = ECOFF_UNMARK_STAB (sh.index);
2531 if (!ECOFF_IS_STAB (&sh))
2532 {
2533 if (sh.st == stProc || sh.st == stStaticProc)
2534 {
2535 long procaddr;
2536 long isym;
2537
2538 sh.value += ANOFFSET (section_offsets, SECT_OFF_TEXT);
2539 if (sh.st == stStaticProc)
2540 {
2541 namestring = debug_info->ss + fh->issBase + sh.iss;
2542 prim_record_minimal_symbol_and_info (namestring,
2543 sh.value,
2544 mst_file_text,
2545 NULL,
2546 SECT_OFF_TEXT,
2547 objfile);
2548 }
2549 procaddr = sh.value;
2550
2551 isym = AUX_GET_ISYM (fh->fBigendian,
2552 (debug_info->external_aux
2553 + fh->iauxBase
2554 + sh.index));
2555 (*swap_sym_in) (cur_bfd,
2556 ((char *) debug_info->external_sym
2557 + ((fh->isymBase + isym - 1)
2558 * external_sym_size)),
2559 &sh);
2560 if (sh.st == stEnd)
2561 {
2562 long high = procaddr + sh.value;
2563
2564 /* Kludge for Irix 5.2 zero fh->adr. */
2565 if (!relocatable
2566 && (pst->textlow == 0 || procaddr < pst->textlow))
2567 pst->textlow = procaddr;
2568 if (high > pst->texthigh)
2569 pst->texthigh = high;
2570 }
2571 }
2572 else if (sh.st == stStatic)
2573 {
2574 switch (sh.sc)
2575 {
2576 case scUndefined:
2577 case scNil:
2578 case scAbs:
2579 break;
2580
2581 case scData:
2582 case scSData:
2583 case scRData:
2584 case scPData:
2585 case scXData:
2586 namestring = debug_info->ss + fh->issBase + sh.iss;
2587 sh.value += ANOFFSET (section_offsets, SECT_OFF_DATA);
2588 prim_record_minimal_symbol_and_info (namestring,
2589 sh.value,
2590 mst_file_data,
2591 NULL,
2592 SECT_OFF_DATA,
2593 objfile);
2594 break;
2595
2596 default:
2597 namestring = debug_info->ss + fh->issBase + sh.iss;
2598 sh.value += ANOFFSET (section_offsets, SECT_OFF_BSS);
2599 prim_record_minimal_symbol_and_info (namestring,
2600 sh.value,
2601 mst_file_bss,
2602 NULL,
2603 SECT_OFF_BSS,
2604 objfile);
2605 break;
2606 }
2607 }
2608 continue;
2609 }
2610 #define SET_NAMESTRING() \
2611 namestring = debug_info->ss + fh->issBase + sh.iss
2612 #define CUR_SYMBOL_TYPE type_code
2613 #define CUR_SYMBOL_VALUE sh.value
2614 #define START_PSYMTAB(ofile,secoff,fname,low,symoff,global_syms,static_syms)\
2615 pst = save_pst
2616 #define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps) (void)0
2617 #define HANDLE_RBRAC(val) \
2618 if ((val) > save_pst->texthigh) save_pst->texthigh = (val);
2619 #include "partial-stab.h"
2620 }
2621 }
2622 else
2623 {
2624 for (cur_sdx = 0; cur_sdx < fh->csym;)
2625 {
2626 char *name;
2627 enum address_class class;
2628
2629 (*swap_sym_in) (cur_bfd,
2630 ((char *) debug_info->external_sym
2631 + ((fh->isymBase + cur_sdx)
2632 * external_sym_size)),
2633 &sh);
2634
2635 if (ECOFF_IS_STAB (&sh))
2636 {
2637 cur_sdx++;
2638 continue;
2639 }
2640
2641 /* Non absolute static symbols go into the minimal table. */
2642 if (sh.sc == scUndefined || sh.sc == scNil
2643 || (sh.index == indexNil
2644 && (sh.st != stStatic || sh.sc == scAbs)))
2645 {
2646 /* FIXME, premature? */
2647 cur_sdx++;
2648 continue;
2649 }
2650
2651 name = debug_info->ss + fh->issBase + sh.iss;
2652
2653 switch (sh.sc)
2654 {
2655 case scText:
2656 /* The value of a stEnd symbol is the displacement from the
2657 corresponding start symbol value, do not relocate it. */
2658 if (sh.st != stEnd)
2659 sh.value += ANOFFSET (section_offsets, SECT_OFF_TEXT);
2660 break;
2661 case scData:
2662 case scSData:
2663 case scRData:
2664 case scPData:
2665 case scXData:
2666 sh.value += ANOFFSET (section_offsets, SECT_OFF_DATA);
2667 break;
2668 case scBss:
2669 case scSBss:
2670 sh.value += ANOFFSET (section_offsets, SECT_OFF_BSS);
2671 break;
2672 }
2673
2674 switch (sh.st)
2675 {
2676 long high;
2677 long procaddr;
2678 int new_sdx;
2679
2680 case stStaticProc:
2681 prim_record_minimal_symbol_and_info (name, sh.value,
2682 mst_file_text, NULL,
2683 SECT_OFF_TEXT, objfile);
2684
2685 /* FALLTHROUGH */
2686
2687 case stProc:
2688 /* Usually there is a local and a global stProc symbol
2689 for a function. This means that the function name
2690 has already been entered into the mimimal symbol table
2691 while processing the global symbols in pass 2 above.
2692 One notable exception is the PROGRAM name from
2693 f77 compiled executables, it is only put out as
2694 local stProc symbol, and a global MAIN__ stProc symbol
2695 points to it. It doesn't matter though, as gdb is
2696 still able to find the PROGRAM name via the partial
2697 symbol table, and the MAIN__ symbol via the minimal
2698 symbol table. */
2699 if (sh.st == stProc)
2700 ADD_PSYMBOL_TO_LIST (name, strlen (name),
2701 VAR_NAMESPACE, LOC_BLOCK,
2702 objfile->global_psymbols,
2703 sh.value, psymtab_language, objfile);
2704 else
2705 ADD_PSYMBOL_TO_LIST (name, strlen (name),
2706 VAR_NAMESPACE, LOC_BLOCK,
2707 objfile->static_psymbols,
2708 sh.value, psymtab_language, objfile);
2709
2710 /* Skip over procedure to next one. */
2711 if (sh.index >= hdr->iauxMax)
2712 {
2713 /* Should not happen, but does when cross-compiling
2714 with the MIPS compiler. FIXME -- pull later. */
2715 complain (&index_complaint, name);
2716 new_sdx = cur_sdx + 1; /* Don't skip at all */
2717 }
2718 else
2719 new_sdx = AUX_GET_ISYM (fh->fBigendian,
2720 (debug_info->external_aux
2721 + fh->iauxBase
2722 + sh.index));
2723 procaddr = sh.value;
2724
2725 if (new_sdx <= cur_sdx)
2726 {
2727 /* This should not happen either... FIXME. */
2728 complain (&aux_index_complaint, name);
2729 new_sdx = cur_sdx + 1; /* Don't skip backward */
2730 }
2731
2732 cur_sdx = new_sdx;
2733 (*swap_sym_in) (cur_bfd,
2734 ((char *) debug_info->external_sym
2735 + ((fh->isymBase + cur_sdx - 1)
2736 * external_sym_size)),
2737 &sh);
2738 if (sh.st != stEnd)
2739 continue;
2740
2741 /* Kludge for Irix 5.2 zero fh->adr. */
2742 if (!relocatable
2743 && (pst->textlow == 0 || procaddr < pst->textlow))
2744 pst->textlow = procaddr;
2745
2746 high = procaddr + sh.value;
2747 if (high > pst->texthigh)
2748 pst->texthigh = high;
2749 continue;
2750
2751 case stStatic: /* Variable */
2752 if (sh.sc == scData
2753 || sh.sc == scSData
2754 || sh.sc == scRData
2755 || sh.sc == scPData
2756 || sh.sc == scXData)
2757 prim_record_minimal_symbol_and_info (name, sh.value,
2758 mst_file_data, NULL,
2759 SECT_OFF_DATA,
2760 objfile);
2761 else
2762 prim_record_minimal_symbol_and_info (name, sh.value,
2763 mst_file_bss, NULL,
2764 SECT_OFF_BSS,
2765 objfile);
2766 class = LOC_STATIC;
2767 break;
2768
2769 case stIndirect:/* Irix5 forward declaration */
2770 /* Skip forward declarations from Irix5 cc */
2771 goto skip;
2772
2773 case stTypedef:/* Typedef */
2774 /* Skip typedefs for forward declarations and opaque
2775 structs from alpha and mips cc. */
2776 if (sh.iss == 0 || has_opaque_xref (fh, &sh))
2777 goto skip;
2778 class = LOC_TYPEDEF;
2779 break;
2780
2781 case stConstant: /* Constant decl */
2782 class = LOC_CONST;
2783 break;
2784
2785 case stUnion:
2786 case stStruct:
2787 case stEnum:
2788 case stBlock: /* { }, str, un, enum*/
2789 /* Do not create a partial symbol for cc unnamed aggregates
2790 and gcc empty aggregates. */
2791 if ((sh.sc == scInfo
2792 || sh.sc == scCommon || sh.sc == scSCommon)
2793 && sh.iss != 0
2794 && sh.index != cur_sdx + 2)
2795 {
2796 ADD_PSYMBOL_TO_LIST (name, strlen (name),
2797 STRUCT_NAMESPACE, LOC_TYPEDEF,
2798 objfile->static_psymbols,
2799 sh.value,
2800 psymtab_language, objfile);
2801 }
2802 handle_psymbol_enumerators (objfile, fh, sh.st);
2803
2804 /* Skip over the block */
2805 new_sdx = sh.index;
2806 if (new_sdx <= cur_sdx)
2807 {
2808 /* This happens with the Ultrix kernel. */
2809 complain (&block_index_complaint, name);
2810 new_sdx = cur_sdx + 1; /* Don't skip backward */
2811 }
2812 cur_sdx = new_sdx;
2813 continue;
2814
2815 case stFile: /* File headers */
2816 case stLabel: /* Labels */
2817 case stEnd: /* Ends of files */
2818 goto skip;
2819
2820 case stLocal: /* Local variables */
2821 /* Normally these are skipped because we skip over
2822 all blocks we see. However, these can occur
2823 as visible symbols in a .h file that contains code. */
2824 goto skip;
2825
2826 default:
2827 /* Both complaints are valid: one gives symbol name,
2828 the other the offending symbol type. */
2829 complain (&unknown_sym_complaint, name);
2830 complain (&unknown_st_complaint, sh.st);
2831 cur_sdx++;
2832 continue;
2833 }
2834 /* Use this gdb symbol */
2835 ADD_PSYMBOL_TO_LIST (name, strlen (name),
2836 VAR_NAMESPACE, class,
2837 objfile->static_psymbols, sh.value,
2838 psymtab_language, objfile);
2839 skip:
2840 cur_sdx++; /* Go to next file symbol */
2841 }
2842
2843 /* Now do enter the external symbols. */
2844 ext_ptr = &extern_tab[fdr_to_pst[f_idx].globals_offset];
2845 cur_sdx = fdr_to_pst[f_idx].n_globals;
2846 PST_PRIVATE (save_pst)->extern_count = cur_sdx;
2847 PST_PRIVATE (save_pst)->extern_tab = ext_ptr;
2848 for (; --cur_sdx >= 0; ext_ptr++)
2849 {
2850 enum address_class class;
2851 SYMR *psh;
2852 char *name;
2853 CORE_ADDR svalue;
2854
2855 if (ext_ptr->ifd != f_idx)
2856 abort ();
2857 psh = &ext_ptr->asym;
2858
2859 /* Do not add undefined symbols to the partial symbol table. */
2860 if (psh->sc == scUndefined || psh->sc == scNil)
2861 continue;
2862
2863 svalue = psh->value;
2864 switch (psh->sc)
2865 {
2866 case scText:
2867 svalue += ANOFFSET (section_offsets, SECT_OFF_TEXT);
2868 break;
2869 case scData:
2870 case scSData:
2871 case scRData:
2872 case scPData:
2873 case scXData:
2874 svalue += ANOFFSET (section_offsets, SECT_OFF_DATA);
2875 break;
2876 case scBss:
2877 case scSBss:
2878 svalue += ANOFFSET (section_offsets, SECT_OFF_BSS);
2879 break;
2880 }
2881
2882 switch (psh->st)
2883 {
2884 case stNil:
2885 /* These are generated for static symbols in .o files,
2886 ignore them. */
2887 continue;
2888 case stProc:
2889 case stStaticProc:
2890 /* External procedure symbols have been entered
2891 into the minimal symbol table in pass 2 above.
2892 Ignore them, as parse_external will ignore them too. */
2893 continue;
2894 case stLabel:
2895 class = LOC_LABEL;
2896 break;
2897 default:
2898 complain (&unknown_ext_complaint,
2899 debug_info->ssext + psh->iss);
2900 /* Fall through, pretend it's global. */
2901 case stGlobal:
2902 /* Global common symbols are resolved by the runtime loader,
2903 ignore them. */
2904 if (psh->sc == scCommon || psh->sc == scSCommon)
2905 continue;
2906
2907 class = LOC_STATIC;
2908 break;
2909 }
2910 name = debug_info->ssext + psh->iss;
2911 ADD_PSYMBOL_ADDR_TO_LIST (name, strlen (name),
2912 VAR_NAMESPACE, class,
2913 objfile->global_psymbols,
2914 svalue,
2915 psymtab_language, objfile);
2916 }
2917 }
2918
2919 /* Link pst to FDR. end_psymtab returns NULL if the psymtab was
2920 empty and put on the free list. */
2921 fdr_to_pst[f_idx].pst = end_psymtab (save_pst,
2922 psymtab_include_list, includes_used,
2923 -1, save_pst->texthigh,
2924 dependency_list, dependencies_used);
2925 if (objfile->ei.entry_point >= save_pst->textlow &&
2926 objfile->ei.entry_point < save_pst->texthigh)
2927 {
2928 objfile->ei.entry_file_lowpc = save_pst->textlow;
2929 objfile->ei.entry_file_highpc = save_pst->texthigh;
2930 }
2931
2932 /* The objfile has its functions reordered if this partial symbol
2933 table overlaps any other partial symbol table.
2934 We cannot assume a reordered objfile if a partial symbol table
2935 is contained within another partial symbol table, as partial symbol
2936 tables for include files with executable code are contained
2937 within the partial symbol table for the including source file,
2938 and we do not want to flag the objfile reordered for these cases.
2939
2940 This strategy works well for Irix-5.2 shared libraries, but we
2941 might have to use a more elaborate (and slower) algorithm for
2942 other cases. */
2943 save_pst = fdr_to_pst[f_idx].pst;
2944 if (save_pst != NULL
2945 && save_pst->textlow != 0
2946 && !(objfile->flags & OBJF_REORDERED))
2947 {
2948 ALL_OBJFILE_PSYMTABS (objfile, pst)
2949 {
2950 if (save_pst != pst
2951 && save_pst->textlow >= pst->textlow
2952 && save_pst->textlow < pst->texthigh
2953 && save_pst->texthigh > pst->texthigh)
2954 {
2955 objfile->flags |= OBJF_REORDERED;
2956 break;
2957 }
2958 }
2959 }
2960 }
2961
2962 /* Now scan the FDRs for dependencies */
2963 for (f_idx = 0; f_idx < hdr->ifdMax; f_idx++)
2964 {
2965 fh = f_idx + debug_info->fdr;
2966 pst = fdr_to_pst[f_idx].pst;
2967
2968 if (pst == (struct partial_symtab *)NULL)
2969 continue;
2970
2971 /* This should catch stabs-in-ecoff. */
2972 if (fh->crfd <= 1)
2973 continue;
2974
2975 /* Skip the first file indirect entry as it is a self dependency
2976 for source files or a reverse .h -> .c dependency for header files. */
2977 pst->number_of_dependencies = 0;
2978 pst->dependencies =
2979 ((struct partial_symtab **)
2980 obstack_alloc (&objfile->psymbol_obstack,
2981 ((fh->crfd - 1)
2982 * sizeof (struct partial_symtab *))));
2983 for (s_idx = 1; s_idx < fh->crfd; s_idx++)
2984 {
2985 RFDT rh;
2986
2987 (*swap_rfd_in) (cur_bfd,
2988 ((char *) debug_info->external_rfd
2989 + (fh->rfdBase + s_idx) * external_rfd_size),
2990 &rh);
2991 if (rh < 0 || rh >= hdr->ifdMax)
2992 {
2993 complain (&bad_file_number_complaint, rh);
2994 continue;
2995 }
2996
2997 /* Skip self dependencies of header files. */
2998 if (rh == f_idx)
2999 continue;
3000
3001 /* Do not add to dependeny list if psymtab was empty. */
3002 if (fdr_to_pst[rh].pst == (struct partial_symtab *)NULL)
3003 continue;
3004 pst->dependencies[pst->number_of_dependencies++] = fdr_to_pst[rh].pst;
3005 }
3006 }
3007
3008 /* Remove the dummy psymtab created for -O3 images above, if it is
3009 still empty, to enable the detection of stripped executables. */
3010 if (objfile->psymtabs->next == NULL
3011 && objfile->psymtabs->number_of_dependencies == 0
3012 && objfile->psymtabs->n_global_syms == 0
3013 && objfile->psymtabs->n_static_syms == 0)
3014 objfile->psymtabs = NULL;
3015 do_cleanups (old_chain);
3016 }
3017
3018 /* If the current psymbol has an enumerated type, we need to add
3019 all the the enum constants to the partial symbol table. */
3020
3021 static void
3022 handle_psymbol_enumerators (objfile, fh, stype)
3023 struct objfile *objfile;
3024 FDR *fh;
3025 int stype;
3026 {
3027 const bfd_size_type external_sym_size = debug_swap->external_sym_size;
3028 void (* const swap_sym_in) PARAMS ((bfd *, PTR, SYMR *))
3029 = debug_swap->swap_sym_in;
3030 char *ext_sym = ((char *) debug_info->external_sym
3031 + ((fh->isymBase + cur_sdx + 1) * external_sym_size));
3032 SYMR sh;
3033 TIR tir;
3034
3035 switch (stype)
3036 {
3037 case stEnum:
3038 break;
3039
3040 case stBlock:
3041 /* It is an enumerated type if the next symbol entry is a stMember
3042 and its auxiliary index is indexNil or its auxiliary entry
3043 is a plain btNil or btVoid. */
3044 (*swap_sym_in) (cur_bfd, ext_sym, &sh);
3045 if (sh.st != stMember)
3046 return;
3047
3048 if (sh.index == indexNil)
3049 break;
3050 (*debug_swap->swap_tir_in) (fh->fBigendian,
3051 &(debug_info->external_aux
3052 + fh->iauxBase + sh.index)->a_ti,
3053 &tir);
3054 if ((tir.bt != btNil && tir.bt != btVoid) || tir.tq0 != tqNil)
3055 return;
3056 break;
3057
3058 default:
3059 return;
3060 }
3061
3062 for (;;)
3063 {
3064 char *name;
3065
3066 (*swap_sym_in) (cur_bfd, ext_sym, &sh);
3067 if (sh.st != stMember)
3068 break;
3069 name = debug_info->ss + cur_fdr->issBase + sh.iss;
3070
3071 /* Note that the value doesn't matter for enum constants
3072 in psymtabs, just in symtabs. */
3073 ADD_PSYMBOL_TO_LIST (name, strlen (name),
3074 VAR_NAMESPACE, LOC_CONST,
3075 objfile->static_psymbols, 0,
3076 psymtab_language, objfile);
3077 ext_sym += external_sym_size;
3078 }
3079 }
3080
3081 static char *
3082 mdebug_next_symbol_text ()
3083 {
3084 SYMR sh;
3085
3086 cur_sdx++;
3087 (*debug_swap->swap_sym_in) (cur_bfd,
3088 ((char *) debug_info->external_sym
3089 + ((cur_fdr->isymBase + cur_sdx)
3090 * debug_swap->external_sym_size)),
3091 &sh);
3092 return debug_info->ss + cur_fdr->issBase + sh.iss;
3093 }
3094
3095 /* Ancillary function to psymtab_to_symtab(). Does all the work
3096 for turning the partial symtab PST into a symtab, recurring
3097 first on all dependent psymtabs. The argument FILENAME is
3098 only passed so we can see in debug stack traces what file
3099 is being read.
3100
3101 This function has a split personality, based on whether the
3102 symbol table contains ordinary ecoff symbols, or stabs-in-ecoff.
3103 The flow of control and even the memory allocation differs. FIXME. */
3104
3105 static void
3106 psymtab_to_symtab_1 (pst, filename)
3107 struct partial_symtab *pst;
3108 char *filename;
3109 {
3110 bfd_size_type external_sym_size;
3111 bfd_size_type external_pdr_size;
3112 void (*swap_sym_in) PARAMS ((bfd *, PTR, SYMR *));
3113 void (*swap_pdr_in) PARAMS ((bfd *, PTR, PDR *));
3114 int i;
3115 struct symtab *st;
3116 FDR *fh;
3117 struct linetable *lines;
3118
3119 if (pst->readin)
3120 return;
3121 pst->readin = 1;
3122
3123 /* Read in all partial symbtabs on which this one is dependent.
3124 NOTE that we do have circular dependencies, sigh. We solved
3125 that by setting pst->readin before this point. */
3126
3127 for (i = 0; i < pst->number_of_dependencies; i++)
3128 if (!pst->dependencies[i]->readin)
3129 {
3130 /* Inform about additional files to be read in. */
3131 if (info_verbose)
3132 {
3133 fputs_filtered (" ", gdb_stdout);
3134 wrap_here ("");
3135 fputs_filtered ("and ", gdb_stdout);
3136 wrap_here ("");
3137 printf_filtered ("%s...",
3138 pst->dependencies[i]->filename);
3139 wrap_here (""); /* Flush output */
3140 gdb_flush (gdb_stdout);
3141 }
3142 /* We only pass the filename for debug purposes */
3143 psymtab_to_symtab_1 (pst->dependencies[i],
3144 pst->dependencies[i]->filename);
3145 }
3146
3147 /* Do nothing if this is a dummy psymtab. */
3148
3149 if (pst->n_global_syms == 0 && pst->n_static_syms == 0
3150 && pst->textlow == 0 && pst->texthigh == 0)
3151 return;
3152
3153 /* Now read the symbols for this symtab */
3154
3155 cur_bfd = CUR_BFD (pst);
3156 debug_swap = DEBUG_SWAP (pst);
3157 debug_info = DEBUG_INFO (pst);
3158 pending_list = PENDING_LIST (pst);
3159 external_sym_size = debug_swap->external_sym_size;
3160 external_pdr_size = debug_swap->external_pdr_size;
3161 swap_sym_in = debug_swap->swap_sym_in;
3162 swap_pdr_in = debug_swap->swap_pdr_in;
3163 current_objfile = pst->objfile;
3164 cur_fd = FDR_IDX (pst);
3165 fh = ((cur_fd == -1)
3166 ? (FDR *) NULL
3167 : debug_info->fdr + cur_fd);
3168 cur_fdr = fh;
3169
3170 /* See comment in parse_partial_symbols about the @stabs sentinel. */
3171 processing_gcc_compilation = 0;
3172 if (fh != (FDR *) NULL && fh->csym >= 2)
3173 {
3174 SYMR sh;
3175
3176 (*swap_sym_in) (cur_bfd,
3177 ((char *) debug_info->external_sym
3178 + (fh->isymBase + 1) * external_sym_size),
3179 &sh);
3180 if (STREQ (debug_info->ss + fh->issBase + sh.iss,
3181 stabs_symbol))
3182 {
3183 /* We indicate that this is a GCC compilation so that certain
3184 features will be enabled in stabsread/dbxread. */
3185 processing_gcc_compilation = 2;
3186 }
3187 }
3188
3189 if (processing_gcc_compilation != 0)
3190 {
3191 char *pdr_ptr;
3192 char *pdr_end;
3193 int first_pdr;
3194 unsigned long first_off = 0;
3195
3196 /* This symbol table contains stabs-in-ecoff entries. */
3197
3198 /* Parse local symbols first */
3199
3200 if (fh->csym <= 2) /* FIXME, this blows psymtab->symtab ptr */
3201 {
3202 current_objfile = NULL;
3203 return;
3204 }
3205 for (cur_sdx = 2; cur_sdx < fh->csym; cur_sdx++)
3206 {
3207 SYMR sh;
3208 char *name;
3209 CORE_ADDR valu;
3210
3211 (*swap_sym_in) (cur_bfd,
3212 (((char *) debug_info->external_sym)
3213 + (fh->isymBase + cur_sdx) * external_sym_size),
3214 &sh);
3215 name = debug_info->ss + fh->issBase + sh.iss;
3216 valu = sh.value;
3217 if (ECOFF_IS_STAB (&sh))
3218 {
3219 int type_code = ECOFF_UNMARK_STAB (sh.index);
3220
3221 /* We should never get non N_STAB symbols here, but they
3222 should be harmless, so keep process_one_symbol from
3223 complaining about them. */
3224 if (type_code & N_STAB)
3225 {
3226 process_one_symbol (type_code, 0, valu, name,
3227 pst->section_offsets, pst->objfile);
3228 }
3229 if (type_code == N_FUN)
3230 {
3231 /* Make up special symbol to contain
3232 procedure specific info */
3233 struct mips_extra_func_info *e =
3234 ((struct mips_extra_func_info *)
3235 obstack_alloc (&current_objfile->symbol_obstack,
3236 sizeof (struct mips_extra_func_info)));
3237 struct symbol *s = new_symbol (MIPS_EFI_SYMBOL_NAME);
3238
3239 memset ((PTR) e, 0, sizeof (struct mips_extra_func_info));
3240 SYMBOL_NAMESPACE (s) = LABEL_NAMESPACE;
3241 SYMBOL_CLASS (s) = LOC_CONST;
3242 SYMBOL_TYPE (s) = mdebug_type_void;
3243 SYMBOL_VALUE (s) = (long) e;
3244 e->pdr.framereg = -1;
3245 add_symbol_to_list (s, &local_symbols);
3246 }
3247 }
3248 else if (sh.st == stLabel)
3249 {
3250 if (sh.index == indexNil)
3251 {
3252 /* This is what the gcc2_compiled and __gnu_compiled_*
3253 show up as. So don't complain. */
3254 ;
3255 }
3256 else
3257 {
3258 /* Handle encoded stab line number. */
3259 valu += ANOFFSET (pst->section_offsets, SECT_OFF_TEXT);
3260 record_line (current_subfile, sh.index, valu);
3261 }
3262 }
3263 else if (sh.st == stProc || sh.st == stStaticProc
3264 || sh.st == stStatic || sh.st == stEnd)
3265 /* These are generated by gcc-2.x, do not complain */
3266 ;
3267 else
3268 complain (&stab_unknown_complaint, name);
3269 }
3270 st = end_symtab (pst->texthigh, 0, 0, pst->objfile, SECT_OFF_TEXT);
3271 end_stabs ();
3272
3273 /* Sort the symbol table now, we are done adding symbols to it.
3274 We must do this before parse_procedure calls lookup_symbol. */
3275 sort_symtab_syms (st);
3276
3277 /* There used to be a call to sort_blocks here, but this should not
3278 be necessary for stabs symtabs. And as sort_blocks modifies the
3279 start address of the GLOBAL_BLOCK to the FIRST_LOCAL_BLOCK,
3280 it did the wrong thing if the first procedure in a file was
3281 generated via asm statements. */
3282
3283 /* Fill in procedure info next. */
3284 first_pdr = 1;
3285 pdr_ptr = ((char *) debug_info->external_pdr
3286 + fh->ipdFirst * external_pdr_size);
3287 pdr_end = pdr_ptr + fh->cpd * external_pdr_size;
3288 for (; pdr_ptr < pdr_end; pdr_ptr += external_pdr_size)
3289 {
3290 PDR pr;
3291
3292 (*swap_pdr_in) (cur_bfd, pdr_ptr, &pr);
3293 if (first_pdr)
3294 {
3295 first_off = pr.adr;
3296 first_pdr = 0;
3297 }
3298 parse_procedure (&pr, st, first_off, pst);
3299 }
3300 }
3301 else
3302 {
3303 /* This symbol table contains ordinary ecoff entries. */
3304
3305 int f_max;
3306 int maxlines;
3307 EXTR *ext_ptr;
3308
3309 /* How many symbols will we need */
3310 /* FIXME, this does not count enum values. */
3311 f_max = pst->n_global_syms + pst->n_static_syms;
3312 if (fh == 0)
3313 {
3314 maxlines = 0;
3315 st = new_symtab ("unknown", f_max, 0, pst->objfile);
3316 }
3317 else
3318 {
3319 f_max += fh->csym + fh->cpd;
3320 maxlines = 2 * fh->cline;
3321 st = new_symtab (pst->filename, 2 * f_max, maxlines, pst->objfile);
3322
3323 /* The proper language was already determined when building
3324 the psymtab, use it. */
3325 st->language = PST_PRIVATE (pst)->pst_language;
3326 }
3327
3328 psymtab_language = st->language;
3329
3330 lines = LINETABLE (st);
3331
3332 /* Get a new lexical context */
3333
3334 push_parse_stack ();
3335 top_stack->cur_st = st;
3336 top_stack->cur_block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (st),
3337 STATIC_BLOCK);
3338 BLOCK_START (top_stack->cur_block) = pst->textlow;
3339 BLOCK_END (top_stack->cur_block) = 0;
3340 top_stack->blocktype = stFile;
3341 top_stack->maxsyms = 2 * f_max;
3342 top_stack->cur_type = 0;
3343 top_stack->procadr = 0;
3344 top_stack->numargs = 0;
3345 found_ecoff_debugging_info = 0;
3346
3347 if (fh)
3348 {
3349 char *sym_ptr;
3350 char *sym_end;
3351
3352 /* Parse local symbols first */
3353 sym_ptr = ((char *) debug_info->external_sym
3354 + fh->isymBase * external_sym_size);
3355 sym_end = sym_ptr + fh->csym * external_sym_size;
3356 while (sym_ptr < sym_end)
3357 {
3358 SYMR sh;
3359 int c;
3360
3361 (*swap_sym_in) (cur_bfd, sym_ptr, &sh);
3362 c = parse_symbol (&sh,
3363 debug_info->external_aux + fh->iauxBase,
3364 sym_ptr, fh->fBigendian, pst->section_offsets);
3365 sym_ptr += c * external_sym_size;
3366 }
3367
3368 /* Linenumbers. At the end, check if we can save memory.
3369 parse_lines has to look ahead an arbitrary number of PDR
3370 structures, so we swap them all first. */
3371 if (fh->cpd > 0)
3372 {
3373 PDR *pr_block;
3374 struct cleanup *old_chain;
3375 char *pdr_ptr;
3376 char *pdr_end;
3377 PDR *pdr_in;
3378 PDR *pdr_in_end;
3379
3380 pr_block = (PDR *) xmalloc (fh->cpd * sizeof (PDR));
3381
3382 old_chain = make_cleanup (free, pr_block);
3383
3384 pdr_ptr = ((char *) debug_info->external_pdr
3385 + fh->ipdFirst * external_pdr_size);
3386 pdr_end = pdr_ptr + fh->cpd * external_pdr_size;
3387 pdr_in = pr_block;
3388 for (;
3389 pdr_ptr < pdr_end;
3390 pdr_ptr += external_pdr_size, pdr_in++)
3391 (*swap_pdr_in) (cur_bfd, pdr_ptr, pdr_in);
3392
3393 parse_lines (fh, pr_block, lines, maxlines, pst);
3394 if (lines->nitems < fh->cline)
3395 lines = shrink_linetable (lines);
3396
3397 /* Fill in procedure info next. */
3398 pdr_in = pr_block;
3399 pdr_in_end = pdr_in + fh->cpd;
3400 for (; pdr_in < pdr_in_end; pdr_in++)
3401 parse_procedure (pdr_in, 0, pr_block->adr, pst);
3402
3403 do_cleanups (old_chain);
3404 }
3405 }
3406
3407 LINETABLE (st) = lines;
3408
3409 /* .. and our share of externals.
3410 XXX use the global list to speed up things here. how?
3411 FIXME, Maybe quit once we have found the right number of ext's? */
3412 top_stack->cur_st = st;
3413 top_stack->cur_block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (top_stack->cur_st),
3414 GLOBAL_BLOCK);
3415 top_stack->blocktype = stFile;
3416 top_stack->maxsyms
3417 = (debug_info->symbolic_header.isymMax
3418 + debug_info->symbolic_header.ipdMax
3419 + debug_info->symbolic_header.iextMax);
3420
3421 ext_ptr = PST_PRIVATE (pst)->extern_tab;
3422 for (i = PST_PRIVATE (pst)->extern_count; --i >= 0; ext_ptr++)
3423 parse_external (ext_ptr, fh->fBigendian, pst->section_offsets);
3424
3425 /* If there are undefined symbols, tell the user.
3426 The alpha has an undefined symbol for every symbol that is
3427 from a shared library, so tell the user only if verbose is on. */
3428 if (info_verbose && n_undef_symbols)
3429 {
3430 printf_filtered ("File %s contains %d unresolved references:",
3431 st->filename, n_undef_symbols);
3432 printf_filtered ("\n\t%4d variables\n\t%4d procedures\n\t%4d labels\n",
3433 n_undef_vars, n_undef_procs, n_undef_labels);
3434 n_undef_symbols = n_undef_labels = n_undef_vars = n_undef_procs = 0;
3435
3436 }
3437 pop_parse_stack ();
3438
3439 st->primary = 1;
3440
3441 /* Sort the symbol table now, we are done adding symbols to it.*/
3442 sort_symtab_syms (st);
3443
3444 sort_blocks (st);
3445 }
3446
3447 /* Now link the psymtab and the symtab. */
3448 pst->symtab = st;
3449
3450 current_objfile = NULL;
3451 }
3452 \f
3453 /* Ancillary parsing procedures. */
3454
3455 /* Return 1 if the symbol pointed to by SH has a cross reference
3456 to an opaque aggregate type, else 0. */
3457
3458 static int
3459 has_opaque_xref (fh, sh)
3460 FDR *fh;
3461 SYMR *sh;
3462 {
3463 TIR tir;
3464 union aux_ext *ax;
3465 RNDXR rn[1];
3466 unsigned int rf;
3467
3468 if (sh->index == indexNil)
3469 return 0;
3470
3471 ax = debug_info->external_aux + fh->iauxBase + sh->index;
3472 (*debug_swap->swap_tir_in) (fh->fBigendian, &ax->a_ti, &tir);
3473 if (tir.bt != btStruct && tir.bt != btUnion && tir.bt != btEnum)
3474 return 0;
3475
3476 ax++;
3477 (*debug_swap->swap_rndx_in) (fh->fBigendian, &ax->a_rndx, rn);
3478 if (rn->rfd == 0xfff)
3479 rf = AUX_GET_ISYM (fh->fBigendian, ax + 1);
3480 else
3481 rf = rn->rfd;
3482 if (rf != -1)
3483 return 0;
3484 return 1;
3485 }
3486
3487 /* Lookup the type at relative index RN. Return it in TPP
3488 if found and in any event come up with its name PNAME.
3489 BIGEND says whether aux symbols are big-endian or not (from fh->fBigendian).
3490 Return value says how many aux symbols we ate. */
3491
3492 static int
3493 cross_ref (fd, ax, tpp, type_code, pname, bigend, sym_name)
3494 int fd;
3495 union aux_ext *ax;
3496 struct type **tpp;
3497 enum type_code type_code; /* Use to alloc new type if none is found. */
3498 char **pname;
3499 int bigend;
3500 char *sym_name;
3501 {
3502 RNDXR rn[1];
3503 unsigned int rf;
3504 int result = 1;
3505 FDR *fh;
3506 char *esh;
3507 SYMR sh;
3508 int xref_fd;
3509 struct mdebug_pending *pend;
3510
3511 *tpp = (struct type *)NULL;
3512
3513 (*debug_swap->swap_rndx_in) (bigend, &ax->a_rndx, rn);
3514
3515 /* Escape index means 'the next one' */
3516 if (rn->rfd == 0xfff)
3517 {
3518 result++;
3519 rf = AUX_GET_ISYM (bigend, ax + 1);
3520 }
3521 else
3522 {
3523 rf = rn->rfd;
3524 }
3525
3526 /* mips cc uses a rf of -1 for opaque struct definitions.
3527 Set TYPE_FLAG_STUB for these types so that check_stub_type will
3528 resolve them if the struct gets defined in another compilation unit. */
3529 if (rf == -1)
3530 {
3531 *pname = "<undefined>";
3532 *tpp = init_type (type_code, 0, 0, (char *) NULL, current_objfile);
3533 TYPE_FLAGS (*tpp) |= TYPE_FLAG_STUB;
3534 return result;
3535 }
3536
3537 /* mips cc uses an escaped rn->index of 0 for struct return types
3538 of procedures that were compiled without -g. These will always remain
3539 undefined. */
3540 if (rn->rfd == 0xfff && rn->index == 0)
3541 {
3542 *pname = "<undefined>";
3543 return result;
3544 }
3545
3546 /* Find the relative file descriptor and the symbol in it. */
3547 fh = get_rfd (fd, rf);
3548 xref_fd = fh - debug_info->fdr;
3549
3550 if (rn->index >= fh->csym)
3551 {
3552 /* File indirect entry is corrupt. */
3553 *pname = "<illegal>";
3554 complain (&bad_rfd_entry_complaint,
3555 sym_name, xref_fd, rn->index);
3556 return result;
3557 }
3558
3559 /* If we have processed this symbol then we left a forwarding
3560 pointer to the type in the pending list. If not, we`ll put
3561 it in a list of pending types, to be processed later when
3562 the file will be. In any event, we collect the name for the
3563 type here. */
3564
3565 esh = ((char *) debug_info->external_sym
3566 + ((fh->isymBase + rn->index)
3567 * debug_swap->external_sym_size));
3568 (*debug_swap->swap_sym_in) (cur_bfd, esh, &sh);
3569
3570 /* Make sure that this type of cross reference can be handled. */
3571 if ((sh.sc != scInfo
3572 || (sh.st != stBlock && sh.st != stTypedef && sh.st != stIndirect
3573 && sh.st != stStruct && sh.st != stUnion
3574 && sh.st != stEnum))
3575 && (sh.st != stBlock || (sh.sc != scCommon && sh.sc != scSCommon)))
3576 {
3577 /* File indirect entry is corrupt. */
3578 *pname = "<illegal>";
3579 complain (&bad_rfd_entry_complaint,
3580 sym_name, xref_fd, rn->index);
3581 return result;
3582 }
3583
3584 *pname = debug_info->ss + fh->issBase + sh.iss;
3585
3586 pend = is_pending_symbol (fh, esh);
3587 if (pend)
3588 *tpp = pend->t;
3589 else
3590 {
3591 /* We have not yet seen this type. */
3592
3593 if ((sh.iss == 0 && sh.st == stTypedef) || sh.st == stIndirect)
3594 {
3595 TIR tir;
3596
3597 /* alpha cc puts out a stTypedef with a sh.iss of zero for
3598 two cases:
3599 a) forward declarations of structs/unions/enums which are not
3600 defined in this compilation unit.
3601 For these the type will be void. This is a bad design decision
3602 as cross referencing across compilation units is impossible
3603 due to the missing name.
3604 b) forward declarations of structs/unions/enums/typedefs which
3605 are defined later in this file or in another file in the same
3606 compilation unit. Irix5 cc uses a stIndirect symbol for this.
3607 Simply cross reference those again to get the true type.
3608 The forward references are not entered in the pending list and
3609 in the symbol table. */
3610
3611 (*debug_swap->swap_tir_in) (bigend,
3612 &(debug_info->external_aux
3613 + fh->iauxBase + sh.index)->a_ti,
3614 &tir);
3615 if (tir.tq0 != tqNil)
3616 complain (&illegal_forward_tq0_complaint, sym_name);
3617 switch (tir.bt)
3618 {
3619 case btVoid:
3620 *tpp = init_type (type_code, 0, 0, (char *) NULL,
3621 current_objfile);
3622 *pname = "<undefined>";
3623 break;
3624
3625 case btStruct:
3626 case btUnion:
3627 case btEnum:
3628 cross_ref (xref_fd,
3629 (debug_info->external_aux
3630 + fh->iauxBase + sh.index + 1),
3631 tpp, type_code, pname,
3632 fh->fBigendian, sym_name);
3633 break;
3634
3635 case btTypedef:
3636 /* Follow a forward typedef. This might recursively
3637 call cross_ref till we get a non typedef'ed type.
3638 FIXME: This is not correct behaviour, but gdb currently
3639 cannot handle typedefs without type copying. Type
3640 copying is impossible as we might have mutual forward
3641 references between two files and the copied type would not
3642 get filled in when we later parse its definition. */
3643 *tpp = parse_type (xref_fd,
3644 debug_info->external_aux + fh->iauxBase,
3645 sh.index,
3646 (int *)NULL,
3647 fh->fBigendian,
3648 debug_info->ss + fh->issBase + sh.iss);
3649 add_pending (fh, esh, *tpp);
3650 break;
3651
3652 default:
3653 complain (&illegal_forward_bt_complaint, tir.bt, sym_name);
3654 *tpp = init_type (type_code, 0, 0, (char *) NULL,
3655 current_objfile);
3656 break;
3657 }
3658 return result;
3659 }
3660 else if (sh.st == stTypedef)
3661 {
3662 /* Parse the type for a normal typedef. This might recursively call
3663 cross_ref till we get a non typedef'ed type.
3664 FIXME: This is not correct behaviour, but gdb currently
3665 cannot handle typedefs without type copying. But type copying is
3666 impossible as we might have mutual forward references between
3667 two files and the copied type would not get filled in when
3668 we later parse its definition. */
3669 *tpp = parse_type (xref_fd,
3670 debug_info->external_aux + fh->iauxBase,
3671 sh.index,
3672 (int *)NULL,
3673 fh->fBigendian,
3674 debug_info->ss + fh->issBase + sh.iss);
3675 }
3676 else
3677 {
3678 /* Cross reference to a struct/union/enum which is defined
3679 in another file in the same compilation unit but that file
3680 has not been parsed yet.
3681 Initialize the type only, it will be filled in when
3682 it's definition is parsed. */
3683 *tpp = init_type (type_code, 0, 0, (char *) NULL, current_objfile);
3684 }
3685 add_pending (fh, esh, *tpp);
3686 }
3687
3688 /* We used one auxent normally, two if we got a "next one" rf. */
3689 return result;
3690 }
3691
3692
3693 /* Quick&dirty lookup procedure, to avoid the MI ones that require
3694 keeping the symtab sorted */
3695
3696 static struct symbol *
3697 mylookup_symbol (name, block, namespace, class)
3698 char *name;
3699 register struct block *block;
3700 enum namespace namespace;
3701 enum address_class class;
3702 {
3703 register int bot, top, inc;
3704 register struct symbol *sym;
3705
3706 bot = 0;
3707 top = BLOCK_NSYMS (block);
3708 inc = name[0];
3709 while (bot < top)
3710 {
3711 sym = BLOCK_SYM (block, bot);
3712 if (SYMBOL_NAME (sym)[0] == inc
3713 && SYMBOL_NAMESPACE (sym) == namespace
3714 && SYMBOL_CLASS (sym) == class
3715 && strcmp (SYMBOL_NAME (sym), name) == 0)
3716 return sym;
3717 bot++;
3718 }
3719 block = BLOCK_SUPERBLOCK (block);
3720 if (block)
3721 return mylookup_symbol (name, block, namespace, class);
3722 return 0;
3723 }
3724
3725
3726 /* Add a new symbol S to a block B.
3727 Infrequently, we will need to reallocate the block to make it bigger.
3728 We only detect this case when adding to top_stack->cur_block, since
3729 that's the only time we know how big the block is. FIXME. */
3730
3731 static void
3732 add_symbol (s, b)
3733 struct symbol *s;
3734 struct block *b;
3735 {
3736 int nsyms = BLOCK_NSYMS (b)++;
3737 struct block *origb;
3738 struct parse_stack *stackp;
3739
3740 if (b == top_stack->cur_block &&
3741 nsyms >= top_stack->maxsyms)
3742 {
3743 complain (&block_overflow_complaint, SYMBOL_NAME (s));
3744 /* In this case shrink_block is actually grow_block, since
3745 BLOCK_NSYMS(b) is larger than its current size. */
3746 origb = b;
3747 b = shrink_block (top_stack->cur_block, top_stack->cur_st);
3748
3749 /* Now run through the stack replacing pointers to the
3750 original block. shrink_block has already done this
3751 for the blockvector and BLOCK_FUNCTION. */
3752 for (stackp = top_stack; stackp; stackp = stackp->next)
3753 {
3754 if (stackp->cur_block == origb)
3755 {
3756 stackp->cur_block = b;
3757 stackp->maxsyms = BLOCK_NSYMS (b);
3758 }
3759 }
3760 }
3761 BLOCK_SYM (b, nsyms) = s;
3762 }
3763
3764 /* Add a new block B to a symtab S */
3765
3766 static void
3767 add_block (b, s)
3768 struct block *b;
3769 struct symtab *s;
3770 {
3771 struct blockvector *bv = BLOCKVECTOR (s);
3772
3773 bv = (struct blockvector *) xrealloc ((PTR) bv,
3774 (sizeof (struct blockvector)
3775 + BLOCKVECTOR_NBLOCKS (bv)
3776 * sizeof (bv->block)));
3777 if (bv != BLOCKVECTOR (s))
3778 BLOCKVECTOR (s) = bv;
3779
3780 BLOCKVECTOR_BLOCK (bv, BLOCKVECTOR_NBLOCKS (bv)++) = b;
3781 }
3782
3783 /* Add a new linenumber entry (LINENO,ADR) to a linevector LT.
3784 MIPS' linenumber encoding might need more than one byte
3785 to describe it, LAST is used to detect these continuation lines.
3786
3787 Combining lines with the same line number seems like a bad idea.
3788 E.g: There could be a line number entry with the same line number after the
3789 prologue and GDB should not ignore it (this is a better way to find
3790 a prologue than mips_skip_prologue).
3791 But due to the compressed line table format there are line number entries
3792 for the same line which are needed to bridge the gap to the next
3793 line number entry. These entries have a bogus address info with them
3794 and we are unable to tell them from intended duplicate line number
3795 entries.
3796 This is another reason why -ggdb debugging format is preferable. */
3797
3798 static int
3799 add_line (lt, lineno, adr, last)
3800 struct linetable *lt;
3801 int lineno;
3802 CORE_ADDR adr;
3803 int last;
3804 {
3805 /* DEC c89 sometimes produces zero linenos which confuse gdb.
3806 Change them to something sensible. */
3807 if (lineno == 0)
3808 lineno = 1;
3809 if (last == 0)
3810 last = -2; /* make sure we record first line */
3811
3812 if (last == lineno) /* skip continuation lines */
3813 return lineno;
3814
3815 lt->item[lt->nitems].line = lineno;
3816 lt->item[lt->nitems++].pc = adr << 2;
3817 return lineno;
3818 }
3819 \f
3820 /* Sorting and reordering procedures */
3821
3822 /* Blocks with a smaller low bound should come first */
3823
3824 static int
3825 compare_blocks (arg1, arg2)
3826 const PTR arg1;
3827 const PTR arg2;
3828 {
3829 register int addr_diff;
3830 struct block **b1 = (struct block **) arg1;
3831 struct block **b2 = (struct block **) arg2;
3832
3833 addr_diff = (BLOCK_START ((*b1))) - (BLOCK_START ((*b2)));
3834 if (addr_diff == 0)
3835 return (BLOCK_END ((*b2))) - (BLOCK_END ((*b1)));
3836 return addr_diff;
3837 }
3838
3839 /* Sort the blocks of a symtab S.
3840 Reorder the blocks in the blockvector by code-address,
3841 as required by some MI search routines */
3842
3843 static void
3844 sort_blocks (s)
3845 struct symtab *s;
3846 {
3847 struct blockvector *bv = BLOCKVECTOR (s);
3848
3849 if (BLOCKVECTOR_NBLOCKS (bv) <= 2)
3850 {
3851 /* Cosmetic */
3852 if (BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) == 0)
3853 BLOCK_START (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) = 0;
3854 if (BLOCK_END (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) == 0)
3855 BLOCK_START (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) = 0;
3856 return;
3857 }
3858 /*
3859 * This is very unfortunate: normally all functions are compiled in
3860 * the order they are found, but if the file is compiled -O3 things
3861 * are very different. It would be nice to find a reliable test
3862 * to detect -O3 images in advance.
3863 */
3864 if (BLOCKVECTOR_NBLOCKS (bv) > 3)
3865 qsort (&BLOCKVECTOR_BLOCK (bv, FIRST_LOCAL_BLOCK),
3866 BLOCKVECTOR_NBLOCKS (bv) - FIRST_LOCAL_BLOCK,
3867 sizeof (struct block *),
3868 compare_blocks);
3869
3870 {
3871 register CORE_ADDR high = 0;
3872 register int i, j = BLOCKVECTOR_NBLOCKS (bv);
3873
3874 for (i = FIRST_LOCAL_BLOCK; i < j; i++)
3875 if (high < BLOCK_END (BLOCKVECTOR_BLOCK (bv, i)))
3876 high = BLOCK_END (BLOCKVECTOR_BLOCK (bv, i));
3877 BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) = high;
3878 }
3879
3880 BLOCK_START (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) =
3881 BLOCK_START (BLOCKVECTOR_BLOCK (bv, FIRST_LOCAL_BLOCK));
3882
3883 BLOCK_START (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) =
3884 BLOCK_START (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
3885 BLOCK_END (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) =
3886 BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
3887 }
3888 \f
3889
3890 /* Constructor/restructor/destructor procedures */
3891
3892 /* Allocate a new symtab for NAME. Needs an estimate of how many symbols
3893 MAXSYMS and linenumbers MAXLINES we'll put in it */
3894
3895 static struct symtab *
3896 new_symtab (name, maxsyms, maxlines, objfile)
3897 char *name;
3898 int maxsyms;
3899 int maxlines;
3900 struct objfile *objfile;
3901 {
3902 struct symtab *s = allocate_symtab (name, objfile);
3903
3904 LINETABLE (s) = new_linetable (maxlines);
3905
3906 /* All symtabs must have at least two blocks */
3907 BLOCKVECTOR (s) = new_bvect (2);
3908 BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK) = new_block (maxsyms);
3909 BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK) = new_block (maxsyms);
3910 BLOCK_SUPERBLOCK (BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK)) =
3911 BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
3912
3913 s->free_code = free_linetable;
3914
3915 return (s);
3916 }
3917
3918 /* Allocate a new partial_symtab NAME */
3919
3920 static struct partial_symtab *
3921 new_psymtab (name, objfile, section_offsets)
3922 char *name;
3923 struct objfile *objfile;
3924 struct section_offsets *section_offsets;
3925 {
3926 struct partial_symtab *psymtab;
3927
3928 psymtab = allocate_psymtab (name, objfile);
3929 psymtab->section_offsets = section_offsets;
3930
3931 /* Keep a backpointer to the file's symbols */
3932
3933 psymtab->read_symtab_private = ((char *)
3934 obstack_alloc (&objfile->psymbol_obstack,
3935 sizeof (struct symloc)));
3936 memset ((PTR) psymtab->read_symtab_private, 0, sizeof (struct symloc));
3937 CUR_BFD (psymtab) = cur_bfd;
3938 DEBUG_SWAP (psymtab) = debug_swap;
3939 DEBUG_INFO (psymtab) = debug_info;
3940 PENDING_LIST (psymtab) = pending_list;
3941
3942 /* The way to turn this into a symtab is to call... */
3943 psymtab->read_symtab = mdebug_psymtab_to_symtab;
3944 return (psymtab);
3945 }
3946
3947
3948 /* Allocate a linetable array of the given SIZE. Since the struct
3949 already includes one item, we subtract one when calculating the
3950 proper size to allocate. */
3951
3952 static struct linetable *
3953 new_linetable (size)
3954 int size;
3955 {
3956 struct linetable *l;
3957
3958 size = (size - 1) * sizeof (l->item) + sizeof (struct linetable);
3959 l = (struct linetable *) xmalloc (size);
3960 l->nitems = 0;
3961 return l;
3962 }
3963
3964 /* Oops, too big. Shrink it. This was important with the 2.4 linetables,
3965 I am not so sure about the 3.4 ones.
3966
3967 Since the struct linetable already includes one item, we subtract one when
3968 calculating the proper size to allocate. */
3969
3970 static struct linetable *
3971 shrink_linetable (lt)
3972 struct linetable *lt;
3973 {
3974
3975 return (struct linetable *) xrealloc ((PTR) lt,
3976 (sizeof (struct linetable)
3977 + ((lt->nitems - 1)
3978 * sizeof (lt->item))));
3979 }
3980
3981 /* Allocate and zero a new blockvector of NBLOCKS blocks. */
3982
3983 static struct blockvector *
3984 new_bvect (nblocks)
3985 int nblocks;
3986 {
3987 struct blockvector *bv;
3988 int size;
3989
3990 size = sizeof (struct blockvector) + nblocks * sizeof (struct block *);
3991 bv = (struct blockvector *) xzalloc (size);
3992
3993 BLOCKVECTOR_NBLOCKS (bv) = nblocks;
3994
3995 return bv;
3996 }
3997
3998 /* Allocate and zero a new block of MAXSYMS symbols */
3999
4000 static struct block *
4001 new_block (maxsyms)
4002 int maxsyms;
4003 {
4004 int size = sizeof (struct block) + (maxsyms - 1) * sizeof (struct symbol *);
4005
4006 return (struct block *) xzalloc (size);
4007 }
4008
4009 /* Ooops, too big. Shrink block B in symtab S to its minimal size.
4010 Shrink_block can also be used by add_symbol to grow a block. */
4011
4012 static struct block *
4013 shrink_block (b, s)
4014 struct block *b;
4015 struct symtab *s;
4016 {
4017 struct block *new;
4018 struct blockvector *bv = BLOCKVECTOR (s);
4019 int i;
4020
4021 /* Just reallocate it and fix references to the old one */
4022
4023 new = (struct block *) xrealloc ((PTR) b,
4024 (sizeof (struct block)
4025 + ((BLOCK_NSYMS (b) - 1)
4026 * sizeof (struct symbol *))));
4027
4028 /* Should chase pointers to old one. Fortunately, that`s just
4029 the block`s function and inferior blocks */
4030 if (BLOCK_FUNCTION (new) && SYMBOL_BLOCK_VALUE (BLOCK_FUNCTION (new)) == b)
4031 SYMBOL_BLOCK_VALUE (BLOCK_FUNCTION (new)) = new;
4032 for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); i++)
4033 if (BLOCKVECTOR_BLOCK (bv, i) == b)
4034 BLOCKVECTOR_BLOCK (bv, i) = new;
4035 else if (BLOCK_SUPERBLOCK (BLOCKVECTOR_BLOCK (bv, i)) == b)
4036 BLOCK_SUPERBLOCK (BLOCKVECTOR_BLOCK (bv, i)) = new;
4037 return new;
4038 }
4039
4040 /* Create a new symbol with printname NAME */
4041
4042 static struct symbol *
4043 new_symbol (name)
4044 char *name;
4045 {
4046 struct symbol *s = ((struct symbol *)
4047 obstack_alloc (&current_objfile->symbol_obstack,
4048 sizeof (struct symbol)));
4049
4050 memset ((PTR) s, 0, sizeof (*s));
4051 SYMBOL_NAME (s) = name;
4052 SYMBOL_LANGUAGE (s) = psymtab_language;
4053 SYMBOL_INIT_DEMANGLED_NAME (s, &current_objfile->symbol_obstack);
4054 return s;
4055 }
4056
4057 /* Create a new type with printname NAME */
4058
4059 static struct type *
4060 new_type (name)
4061 char *name;
4062 {
4063 struct type *t;
4064
4065 t = alloc_type (current_objfile);
4066 TYPE_NAME (t) = name;
4067 TYPE_CPLUS_SPECIFIC (t) = (struct cplus_struct_type *) &cplus_struct_default;
4068 return t;
4069 }
4070 \f
4071 /* Read ECOFF debugging information from a BFD section. This is
4072 called from elfread.c. It parses the section into a
4073 ecoff_debug_info struct, and then lets the rest of the file handle
4074 it as normal. */
4075
4076 void
4077 elfmdebug_build_psymtabs (objfile, swap, sec, section_offsets)
4078 struct objfile *objfile;
4079 const struct ecoff_debug_swap *swap;
4080 asection *sec;
4081 struct section_offsets *section_offsets;
4082 {
4083 bfd *abfd = objfile->obfd;
4084 struct ecoff_debug_info *info;
4085
4086 info = ((struct ecoff_debug_info *)
4087 obstack_alloc (&objfile->psymbol_obstack,
4088 sizeof (struct ecoff_debug_info)));
4089
4090 if (!(*swap->read_debug_info) (abfd, sec, info))
4091 error ("Error reading ECOFF debugging information: %s",
4092 bfd_errmsg (bfd_get_error ()));
4093
4094 mdebug_build_psymtabs (objfile, swap, info, section_offsets);
4095 }
4096 \f
4097
4098 /* Things used for calling functions in the inferior.
4099 These functions are exported to our companion
4100 mips-tdep.c file and are here because they play
4101 with the symbol-table explicitly. */
4102
4103 /* Sigtramp: make sure we have all the necessary information
4104 about the signal trampoline code. Since the official code
4105 from MIPS does not do so, we make up that information ourselves.
4106 If they fix the library (unlikely) this code will neutralize itself. */
4107
4108 /* FIXME: This function is called only by mips-tdep.c. It needs to be
4109 here because it calls functions defined in this file, but perhaps
4110 this could be handled in a better way. */
4111
4112 void
4113 fixup_sigtramp ()
4114 {
4115 struct symbol *s;
4116 struct symtab *st;
4117 struct block *b, *b0 = NULL;
4118
4119 sigtramp_address = -1;
4120
4121 /* We have to handle the following cases here:
4122 a) The Mips library has a sigtramp label within sigvec.
4123 b) Irix has a _sigtramp which we want to use, but it also has sigvec. */
4124 s = lookup_symbol ("sigvec", 0, VAR_NAMESPACE, 0, NULL);
4125 if (s != 0)
4126 {
4127 b0 = SYMBOL_BLOCK_VALUE (s);
4128 s = lookup_symbol ("sigtramp", b0, VAR_NAMESPACE, 0, NULL);
4129 }
4130 if (s == 0)
4131 {
4132 /* No sigvec or no sigtramp inside sigvec, try _sigtramp. */
4133 s = lookup_symbol ("_sigtramp", 0, VAR_NAMESPACE, 0, NULL);
4134 }
4135
4136 /* But maybe this program uses its own version of sigvec */
4137 if (s == 0)
4138 return;
4139
4140 /* Did we or MIPSco fix the library ? */
4141 if (SYMBOL_CLASS (s) == LOC_BLOCK)
4142 {
4143 sigtramp_address = BLOCK_START (SYMBOL_BLOCK_VALUE (s));
4144 sigtramp_end = BLOCK_END (SYMBOL_BLOCK_VALUE (s));
4145 return;
4146 }
4147
4148 sigtramp_address = SYMBOL_VALUE (s);
4149 sigtramp_end = sigtramp_address + 0x88; /* black magic */
4150
4151 /* But what symtab does it live in ? */
4152 st = find_pc_symtab (SYMBOL_VALUE (s));
4153
4154 /*
4155 * Ok, there goes the fix: turn it into a procedure, with all the
4156 * needed info. Note we make it a nested procedure of sigvec,
4157 * which is the way the (assembly) code is actually written.
4158 */
4159 SYMBOL_NAMESPACE (s) = VAR_NAMESPACE;
4160 SYMBOL_CLASS (s) = LOC_BLOCK;
4161 SYMBOL_TYPE (s) = init_type (TYPE_CODE_FUNC, 4, 0, (char *) NULL,
4162 st->objfile);
4163 TYPE_TARGET_TYPE (SYMBOL_TYPE (s)) = mdebug_type_void;
4164
4165 /* Need a block to allocate MIPS_EFI_SYMBOL_NAME in */
4166 b = new_block (1);
4167 SYMBOL_BLOCK_VALUE (s) = b;
4168 BLOCK_START (b) = sigtramp_address;
4169 BLOCK_END (b) = sigtramp_end;
4170 BLOCK_FUNCTION (b) = s;
4171 BLOCK_SUPERBLOCK (b) = BLOCK_SUPERBLOCK (b0);
4172 add_block (b, st);
4173 sort_blocks (st);
4174
4175 /* Make a MIPS_EFI_SYMBOL_NAME entry for it */
4176 {
4177 struct mips_extra_func_info *e =
4178 ((struct mips_extra_func_info *)
4179 xzalloc (sizeof (struct mips_extra_func_info)));
4180
4181 e->numargs = 0; /* the kernel thinks otherwise */
4182 e->pdr.frameoffset = 32;
4183 e->pdr.framereg = SP_REGNUM;
4184 /* Note that setting pcreg is no longer strictly necessary as
4185 mips_frame_saved_pc is now aware of signal handler frames. */
4186 e->pdr.pcreg = PC_REGNUM;
4187 e->pdr.regmask = -2;
4188 /* Offset to saved r31, in the sigtramp case the saved registers
4189 are above the frame in the sigcontext.
4190 We have 4 alignment bytes, 12 bytes for onstack, mask and pc,
4191 32 * 4 bytes for the general registers, 12 bytes for mdhi, mdlo, ownedfp
4192 and 32 * 4 bytes for the floating point registers. */
4193 e->pdr.regoffset = 4 + 12 + 31 * 4;
4194 e->pdr.fregmask = -1;
4195 /* Offset to saved f30 (first saved *double* register). */
4196 e->pdr.fregoffset = 4 + 12 + 32 * 4 + 12 + 30 * 4;
4197 e->pdr.isym = (long) s;
4198 e->pdr.adr = sigtramp_address;
4199
4200 current_objfile = st->objfile; /* Keep new_symbol happy */
4201 s = new_symbol (MIPS_EFI_SYMBOL_NAME);
4202 SYMBOL_VALUE (s) = (long) e;
4203 SYMBOL_NAMESPACE (s) = LABEL_NAMESPACE;
4204 SYMBOL_CLASS (s) = LOC_CONST;
4205 SYMBOL_TYPE (s) = mdebug_type_void;
4206 current_objfile = NULL;
4207 }
4208
4209 BLOCK_SYM (b, BLOCK_NSYMS (b)++) = s;
4210 }
4211
4212 void
4213 _initialize_mdebugread ()
4214 {
4215 mdebug_type_void =
4216 init_type (TYPE_CODE_VOID, 1,
4217 0,
4218 "void", (struct objfile *) NULL);
4219 mdebug_type_char =
4220 init_type (TYPE_CODE_INT, 1,
4221 0,
4222 "char", (struct objfile *) NULL);
4223 mdebug_type_unsigned_char =
4224 init_type (TYPE_CODE_INT, 1,
4225 TYPE_FLAG_UNSIGNED,
4226 "unsigned char", (struct objfile *) NULL);
4227 mdebug_type_short =
4228 init_type (TYPE_CODE_INT, 2,
4229 0,
4230 "short", (struct objfile *) NULL);
4231 mdebug_type_unsigned_short =
4232 init_type (TYPE_CODE_INT, 2,
4233 TYPE_FLAG_UNSIGNED,
4234 "unsigned short", (struct objfile *) NULL);
4235 mdebug_type_int_32 =
4236 init_type (TYPE_CODE_INT, 4,
4237 0,
4238 "int", (struct objfile *) NULL);
4239 mdebug_type_unsigned_int_32 =
4240 init_type (TYPE_CODE_INT, 4,
4241 TYPE_FLAG_UNSIGNED,
4242 "unsigned int", (struct objfile *) NULL);
4243 mdebug_type_int_64 =
4244 init_type (TYPE_CODE_INT, 8,
4245 0,
4246 "int", (struct objfile *) NULL);
4247 mdebug_type_unsigned_int_64 =
4248 init_type (TYPE_CODE_INT, 8,
4249 TYPE_FLAG_UNSIGNED,
4250 "unsigned int", (struct objfile *) NULL);
4251 mdebug_type_long_32 =
4252 init_type (TYPE_CODE_INT, 4,
4253 0,
4254 "long", (struct objfile *) NULL);
4255 mdebug_type_unsigned_long_32 =
4256 init_type (TYPE_CODE_INT, 4,
4257 TYPE_FLAG_UNSIGNED,
4258 "unsigned long", (struct objfile *) NULL);
4259 mdebug_type_long_64 =
4260 init_type (TYPE_CODE_INT, 8,
4261 0,
4262 "long", (struct objfile *) NULL);
4263 mdebug_type_unsigned_long_64 =
4264 init_type (TYPE_CODE_INT, 8,
4265 TYPE_FLAG_UNSIGNED,
4266 "unsigned long", (struct objfile *) NULL);
4267 mdebug_type_long_long_64 =
4268 init_type (TYPE_CODE_INT, 8,
4269 0,
4270 "long long", (struct objfile *) NULL);
4271 mdebug_type_unsigned_long_long_64 =
4272 init_type (TYPE_CODE_INT, 8,
4273 TYPE_FLAG_UNSIGNED,
4274 "unsigned long long", (struct objfile *) NULL);
4275 mdebug_type_adr_32 =
4276 init_type (TYPE_CODE_PTR, 4,
4277 TYPE_FLAG_UNSIGNED,
4278 "adr_32", (struct objfile *) NULL);
4279 TYPE_TARGET_TYPE (mdebug_type_adr_32) = mdebug_type_void;
4280 mdebug_type_adr_64 =
4281 init_type (TYPE_CODE_PTR, 8,
4282 TYPE_FLAG_UNSIGNED,
4283 "adr_64", (struct objfile *) NULL);
4284 TYPE_TARGET_TYPE (mdebug_type_adr_64) = mdebug_type_void;
4285 mdebug_type_float =
4286 init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
4287 0,
4288 "float", (struct objfile *) NULL);
4289 mdebug_type_double =
4290 init_type (TYPE_CODE_FLT, TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
4291 0,
4292 "double", (struct objfile *) NULL);
4293 mdebug_type_complex =
4294 init_type (TYPE_CODE_COMPLEX, 2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
4295 0,
4296 "complex", (struct objfile *) NULL);
4297 TYPE_TARGET_TYPE (mdebug_type_complex) = mdebug_type_float;
4298 mdebug_type_double_complex =
4299 init_type (TYPE_CODE_COMPLEX, 2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
4300 0,
4301 "double complex", (struct objfile *) NULL);
4302 TYPE_TARGET_TYPE (mdebug_type_double_complex) = mdebug_type_double;
4303
4304 /* Is a "string" the way btString means it the same as TYPE_CODE_STRING?
4305 FIXME. */
4306 mdebug_type_string =
4307 init_type (TYPE_CODE_STRING,
4308 TARGET_CHAR_BIT / TARGET_CHAR_BIT,
4309 0, "string",
4310 (struct objfile *) NULL);
4311
4312 /* We use TYPE_CODE_INT to print these as integers. Does this do any
4313 good? Would we be better off with TYPE_CODE_ERROR? Should
4314 TYPE_CODE_ERROR print things in hex if it knows the size? */
4315 mdebug_type_fixed_dec =
4316 init_type (TYPE_CODE_INT,
4317 TARGET_INT_BIT / TARGET_CHAR_BIT,
4318 0, "fixed decimal",
4319 (struct objfile *) NULL);
4320
4321 mdebug_type_float_dec =
4322 init_type (TYPE_CODE_ERROR,
4323 TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
4324 0, "floating decimal",
4325 (struct objfile *) NULL);
4326
4327 nodebug_func_symbol_type = init_type (TYPE_CODE_FUNC, 1, 0,
4328 "<function, no debug info>", NULL);
4329 TYPE_TARGET_TYPE (nodebug_func_symbol_type) = mdebug_type_int;
4330 nodebug_var_symbol_type =
4331 init_type (TYPE_CODE_INT, TARGET_INT_BIT / HOST_CHAR_BIT, 0,
4332 "<variable, no debug info>", NULL);
4333 }