1 /* Read a symbol table in ECOFF format (Third-Eye).
3 Copyright (C) 1986-2014 Free Software Foundation, Inc.
5 Original version contributed by Alessandro Forin (af@cs.cmu.edu) at
6 CMU. Major work by Per Bothner, John Gilmore and Ian Lance Taylor
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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.
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.
39 This module can read all four of the known byte-order combinations,
40 on any type of host. */
46 #include "filenames.h"
48 #include "gdb_obstack.h"
50 #include "stabsread.h"
51 #include "complaints.h"
53 #include "gdb-demangle.h"
55 #include "dictionary.h"
56 #include "mdebugread.h"
63 #include "coff/ecoff.h" /* COFF-like aspects of ecoff files. */
65 #include "libaout.h" /* Private BFD a.out information. */
66 #include "aout/aout64.h"
67 #include "aout/stab_gnu.h" /* STABS information. */
69 #include "expression.h"
71 extern void _initialize_mdebugread (void);
73 /* Provide a way to test if we have both ECOFF and ELF symbol tables.
74 We use this define in order to know whether we should override a
75 symbol's ECOFF section with its ELF section. This is necessary in
76 case the symbol's ELF section could not be represented in ECOFF. */
77 #define ECOFF_IN_ELF(bfd) (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
78 && bfd_get_section_by_name (bfd, ".mdebug") != NULL)
80 /* The objfile we are currently reading. */
82 static struct objfile *mdebugread_objfile;
86 /* We put a pointer to this structure in the read_symtab_private field
91 /* Index of the FDR that this psymtab represents. */
93 /* The BFD that the psymtab was created from. */
95 const struct ecoff_debug_swap *debug_swap;
96 struct ecoff_debug_info *debug_info;
97 struct mdebug_pending **pending_list;
98 /* Pointer to external symbols for this file. */
100 /* Size of extern_tab. */
102 enum language pst_language;
105 #define PST_PRIVATE(p) ((struct symloc *)(p)->read_symtab_private)
106 #define FDR_IDX(p) (PST_PRIVATE(p)->fdr_idx)
107 #define CUR_BFD(p) (PST_PRIVATE(p)->cur_bfd)
108 #define DEBUG_SWAP(p) (PST_PRIVATE(p)->debug_swap)
109 #define DEBUG_INFO(p) (PST_PRIVATE(p)->debug_info)
110 #define PENDING_LIST(p) (PST_PRIVATE(p)->pending_list)
112 #define SC_IS_TEXT(sc) ((sc) == scText \
113 || (sc) == scRConst \
116 #define SC_IS_DATA(sc) ((sc) == scData \
121 #define SC_IS_COMMON(sc) ((sc) == scCommon || (sc) == scSCommon)
122 #define SC_IS_BSS(sc) ((sc) == scBss)
123 #define SC_IS_SBSS(sc) ((sc) == scSBss)
124 #define SC_IS_UNDEF(sc) ((sc) == scUndefined || (sc) == scSUndefined)
126 /* Various complaints about symbol reading that don't abort the process. */
128 index_complaint (const char *arg1)
130 complaint (&symfile_complaints, _("bad aux index at symbol %s"), arg1);
134 unknown_ext_complaint (const char *arg1)
136 complaint (&symfile_complaints, _("unknown external symbol %s"), arg1);
140 basic_type_complaint (int arg1, const char *arg2)
142 complaint (&symfile_complaints, _("cannot map ECOFF basic type 0x%x for %s"),
147 bad_tag_guess_complaint (const char *arg1)
149 complaint (&symfile_complaints,
150 _("guessed tag type of %s incorrectly"), arg1);
154 bad_rfd_entry_complaint (const char *arg1, int arg2, int arg3)
156 complaint (&symfile_complaints, _("bad rfd entry for %s: file %d, index %d"),
161 unexpected_type_code_complaint (const char *arg1)
163 complaint (&symfile_complaints, _("unexpected type code for %s"), arg1);
166 /* Macros and extra defs. */
168 /* Puns: hard to find whether -g was used and how. */
170 #define MIN_GLEVEL GLEVEL_0
171 #define compare_glevel(a,b) \
172 (((a) == GLEVEL_3) ? ((b) < GLEVEL_3) : \
173 ((b) == GLEVEL_3) ? -1 : (int)((b) - (a)))
175 /* Things that really are local to this module. */
177 /* Remember what we deduced to be the source language of this psymtab. */
179 static enum language psymtab_language = language_unknown;
185 /* How to parse debugging information for CUR_BFD. */
187 static const struct ecoff_debug_swap *debug_swap;
189 /* Pointers to debugging information for CUR_BFD. */
191 static struct ecoff_debug_info *debug_info;
193 /* Pointer to current file decriptor record, and its index. */
198 /* Index of current symbol. */
202 /* Note how much "debuggable" this image is. We would like
203 to see at least one FDR with full symbols. */
205 static int max_gdbinfo;
206 static int max_glevel;
208 /* When examining .o files, report on undefined symbols. */
210 static int n_undef_symbols, n_undef_labels, n_undef_vars, n_undef_procs;
212 /* Pseudo symbol to use when putting stabs into the symbol table. */
214 static char stabs_symbol[] = STABS_SYMBOL;
216 /* Nonzero if we have seen ecoff debugging info for a file. */
218 static int found_ecoff_debugging_info;
220 /* Forward declarations. */
222 static int upgrade_type (int, struct type **, int, union aux_ext *,
225 static void parse_partial_symbols (struct objfile *);
227 static int has_opaque_xref (FDR *, SYMR *);
229 static int cross_ref (int, union aux_ext *, struct type **, enum type_code,
230 char **, int, char *);
232 static struct symbol *new_symbol (char *);
234 static struct type *new_type (char *);
236 enum block_type { FUNCTION_BLOCK, NON_FUNCTION_BLOCK };
238 static struct block *new_block (enum block_type);
240 static struct symtab *new_symtab (const char *, int, struct objfile *);
242 static struct linetable *new_linetable (int);
244 static struct blockvector *new_bvect (int);
246 static struct type *parse_type (int, union aux_ext *, unsigned int, int *,
249 static struct symbol *mylookup_symbol (char *, const struct block *,
250 domain_enum, enum address_class);
252 static void sort_blocks (struct symtab *);
254 static struct partial_symtab *new_psymtab (char *, struct objfile *);
256 static void psymtab_to_symtab_1 (struct objfile *objfile,
257 struct partial_symtab *, const char *);
259 static void add_block (struct block *, struct symtab *);
261 static void add_symbol (struct symbol *, struct symtab *, struct block *);
263 static int add_line (struct linetable *, int, CORE_ADDR, int);
265 static struct linetable *shrink_linetable (struct linetable *);
267 static void handle_psymbol_enumerators (struct objfile *, FDR *, int,
270 static char *mdebug_next_symbol_text (struct objfile *);
272 /* Exported procedure: Builds a symtab from the partial symtab SELF.
273 Restores the environment in effect when SELF was created, delegates
274 most of the work to an ancillary procedure, and sorts
275 and reorders the symtab list at the end. SELF is not NULL. */
278 mdebug_read_symtab (struct partial_symtab *self, struct objfile *objfile)
282 printf_filtered (_("Reading in symbols for %s..."), self->filename);
283 gdb_flush (gdb_stdout);
286 next_symbol_text_func = mdebug_next_symbol_text;
288 psymtab_to_symtab_1 (objfile, self, self->filename);
290 /* Match with global symbols. This only needs to be done once,
291 after all of the symtabs and dependencies have been read in. */
292 scan_file_globals (objfile);
295 printf_filtered (_("done.\n"));
298 /* File-level interface functions. */
300 /* Find a file descriptor given its index RF relative to a file CF. */
303 get_rfd (int cf, int rf)
309 fdrs = debug_info->fdr;
311 /* Object files do not have the RFD table, all refs are absolute. */
314 (*debug_swap->swap_rfd_in) (cur_bfd,
315 ((char *) debug_info->external_rfd
317 * debug_swap->external_rfd_size)),
322 /* Return a safer print NAME for a file descriptor. */
328 return "<stripped file>";
331 return debug_info->ss + f->issBase + f->rss;
335 /* Read in and parse the symtab of the file OBJFILE. Symbols from
336 different sections are relocated via the SECTION_OFFSETS. */
339 mdebug_build_psymtabs (struct objfile *objfile,
340 const struct ecoff_debug_swap *swap,
341 struct ecoff_debug_info *info)
343 cur_bfd = objfile->obfd;
347 stabsread_new_init ();
348 buildsym_new_init ();
349 free_header_files ();
350 init_header_files ();
352 /* Make sure all the FDR information is swapped in. */
353 if (info->fdr == (FDR *) NULL)
359 info->fdr = (FDR *) obstack_alloc (&objfile->objfile_obstack,
360 (info->symbolic_header.ifdMax
362 fdr_src = info->external_fdr;
364 + info->symbolic_header.ifdMax * swap->external_fdr_size);
366 for (; fdr_src < fdr_end; fdr_src += swap->external_fdr_size, fdr_ptr++)
367 (*swap->swap_fdr_in) (objfile->obfd, fdr_src, fdr_ptr);
370 parse_partial_symbols (objfile);
373 /* Check to make sure file was compiled with -g. If not, warn the
374 user of this limitation. */
375 if (compare_glevel (max_glevel, GLEVEL_2) < 0)
377 if (max_gdbinfo == 0)
378 printf_unfiltered (_("\n%s not compiled with -g, "
379 "debugging support is limited.\n"),
381 printf_unfiltered (_("You should compile with -g2 or "
382 "-g3 for best debugging support.\n"));
383 gdb_flush (gdb_stdout);
388 /* Local utilities */
390 /* Map of FDR indexes to partial symtabs. */
394 struct partial_symtab *pst; /* the psymtab proper */
395 long n_globals; /* exported globals (external symbols) */
396 long globals_offset; /* cumulative */
400 /* Utility stack, used to nest procedures and blocks properly.
401 It is a doubly linked list, to avoid too many alloc/free.
402 Since we might need it quite a few times it is NOT deallocated
405 static struct parse_stack
407 struct parse_stack *next, *prev;
408 struct symtab *cur_st; /* Current symtab. */
409 struct block *cur_block; /* Block in it. */
411 /* What are we parsing. stFile, or stBlock are for files and
412 blocks. stProc or stStaticProc means we have seen the start of a
413 procedure, but not the start of the block within in. When we see
414 the start of that block, we change it to stNil, without pushing a
415 new block, i.e. stNil means both a procedure and a block. */
419 struct type *cur_type; /* Type we parse fields for. */
420 int cur_field; /* Field number in cur_type. */
421 CORE_ADDR procadr; /* Start addres of this procedure. */
422 int numargs; /* Its argument count. */
425 *top_stack; /* Top stack ptr */
428 /* Enter a new lexical context. */
431 push_parse_stack (void)
433 struct parse_stack *new;
435 /* Reuse frames if possible. */
436 if (top_stack && top_stack->prev)
437 new = top_stack->prev;
439 new = (struct parse_stack *) xzalloc (sizeof (struct parse_stack));
440 /* Initialize new frame with previous content. */
443 struct parse_stack *prev = new->prev;
446 top_stack->prev = new;
448 new->next = top_stack;
453 /* Exit a lexical context. */
456 pop_parse_stack (void)
461 top_stack = top_stack->next;
465 /* Cross-references might be to things we haven't looked at
466 yet, e.g. type references. To avoid too many type
467 duplications we keep a quick fixup table, an array
468 of lists of references indexed by file descriptor. */
470 struct mdebug_pending
472 struct mdebug_pending *next; /* link */
473 char *s; /* the unswapped symbol */
474 struct type *t; /* its partial type descriptor */
478 /* The pending information is kept for an entire object file. We
479 allocate the pending information table when we create the partial
480 symbols, and we store a pointer to the single table in each
483 static struct mdebug_pending **pending_list;
485 /* Check whether we already saw symbol SH in file FH. */
487 static struct mdebug_pending *
488 is_pending_symbol (FDR *fh, char *sh)
490 int f_idx = fh - debug_info->fdr;
491 struct mdebug_pending *p;
493 /* Linear search is ok, list is typically no more than 10 deep. */
494 for (p = pending_list[f_idx]; p; p = p->next)
500 /* Add a new symbol SH of type T. */
503 add_pending (FDR *fh, char *sh, struct type *t)
505 int f_idx = fh - debug_info->fdr;
506 struct mdebug_pending *p = is_pending_symbol (fh, sh);
508 /* Make sure we do not make duplicates. */
511 p = ((struct mdebug_pending *)
512 obstack_alloc (&mdebugread_objfile->objfile_obstack,
513 sizeof (struct mdebug_pending)));
516 p->next = pending_list[f_idx];
517 pending_list[f_idx] = p;
522 /* Parsing Routines proper. */
524 /* Parse a single symbol. Mostly just make up a GDB symbol for it.
525 For blocks, procedures and types we open a new lexical context.
526 This is basically just a big switch on the symbol's type. Argument
527 AX is the base pointer of aux symbols for this file (fh->iauxBase).
528 EXT_SH points to the unswapped symbol, which is needed for struct,
529 union, etc., types; it is NULL for an EXTR. BIGEND says whether
530 aux symbols are big-endian or little-endian. Return count of
531 SYMR's handled (normally one). */
534 mdebug_reg_to_regnum (struct symbol *sym, struct gdbarch *gdbarch)
536 return gdbarch_ecoff_reg_to_regnum (gdbarch, SYMBOL_VALUE (sym));
539 static const struct symbol_register_ops mdebug_register_funcs = {
543 /* The "aclass" indices for computed symbols. */
545 static int mdebug_register_index;
546 static int mdebug_regparm_index;
549 parse_symbol (SYMR *sh, union aux_ext *ax, char *ext_sh, int bigend,
550 struct section_offsets *section_offsets, struct objfile *objfile)
552 struct gdbarch *gdbarch = get_objfile_arch (objfile);
553 const bfd_size_type external_sym_size = debug_swap->external_sym_size;
554 void (*const swap_sym_in) (bfd *, void *, SYMR *) = debug_swap->swap_sym_in;
558 struct mdebug_pending *pend;
562 enum address_class class;
564 long svalue = sh->value;
567 if (ext_sh == (char *) NULL)
568 name = debug_info->ssext + sh->iss;
570 name = debug_info->ss + cur_fdr->issBase + sh->iss;
576 /* Do not relocate relative values.
577 The value of a stEnd symbol is the displacement from the
578 corresponding start symbol value.
579 The value of a stBlock symbol is the displacement from the
580 procedure address. */
581 if (sh->st != stEnd && sh->st != stBlock)
582 sh->value += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
589 sh->value += ANOFFSET (section_offsets, SECT_OFF_DATA (objfile));
593 sh->value += ANOFFSET (section_offsets, SECT_OFF_BSS (objfile));
602 case stGlobal: /* External symbol, goes into global block. */
604 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (top_stack->cur_st),
606 s = new_symbol (name);
607 SYMBOL_VALUE_ADDRESS (s) = (CORE_ADDR) sh->value;
610 case stStatic: /* Static data, goes into current block. */
612 b = top_stack->cur_block;
613 s = new_symbol (name);
614 if (SC_IS_COMMON (sh->sc))
616 /* It is a FORTRAN common block. At least for SGI Fortran the
617 address is not in the symbol; we need to fix it later in
618 scan_file_globals. */
619 int bucket = hashname (SYMBOL_LINKAGE_NAME (s));
620 SYMBOL_VALUE_CHAIN (s) = global_sym_chain[bucket];
621 global_sym_chain[bucket] = s;
624 SYMBOL_VALUE_ADDRESS (s) = (CORE_ADDR) sh->value;
627 case stLocal: /* Local variable, goes into current block. */
628 b = top_stack->cur_block;
629 s = new_symbol (name);
630 SYMBOL_VALUE (s) = svalue;
631 if (sh->sc == scRegister)
632 class = mdebug_register_index;
636 data: /* Common code for symbols describing data. */
637 SYMBOL_DOMAIN (s) = VAR_DOMAIN;
638 SYMBOL_ACLASS_INDEX (s) = class;
639 add_symbol (s, top_stack->cur_st, b);
641 /* Type could be missing if file is compiled without debugging info. */
642 if (SC_IS_UNDEF (sh->sc)
643 || sh->sc == scNil || sh->index == indexNil)
644 SYMBOL_TYPE (s) = objfile_type (objfile)->nodebug_data_symbol;
646 SYMBOL_TYPE (s) = parse_type (cur_fd, ax, sh->index, 0, bigend, name);
647 /* Value of a data symbol is its memory address. */
650 case stParam: /* Arg to procedure, goes into current
653 found_ecoff_debugging_info = 1;
654 top_stack->numargs++;
656 /* Special GNU C++ name. */
657 if (is_cplus_marker (name[0]) && name[1] == 't' && name[2] == 0)
658 name = "this"; /* FIXME, not alloc'd in obstack. */
659 s = new_symbol (name);
661 SYMBOL_DOMAIN (s) = VAR_DOMAIN;
662 SYMBOL_IS_ARGUMENT (s) = 1;
666 /* Pass by value in register. */
667 SYMBOL_ACLASS_INDEX (s) = mdebug_register_index;
670 /* Pass by reference on stack. */
671 SYMBOL_ACLASS_INDEX (s) = LOC_REF_ARG;
674 /* Pass by reference in register. */
675 SYMBOL_ACLASS_INDEX (s) = mdebug_regparm_index;
678 /* Pass by value on stack. */
679 SYMBOL_ACLASS_INDEX (s) = LOC_ARG;
682 SYMBOL_VALUE (s) = svalue;
683 SYMBOL_TYPE (s) = parse_type (cur_fd, ax, sh->index, 0, bigend, name);
684 add_symbol (s, top_stack->cur_st, top_stack->cur_block);
687 case stLabel: /* label, goes into current block. */
688 s = new_symbol (name);
689 SYMBOL_DOMAIN (s) = VAR_DOMAIN; /* So that it can be used */
690 SYMBOL_ACLASS_INDEX (s) = LOC_LABEL; /* but not misused. */
691 SYMBOL_VALUE_ADDRESS (s) = (CORE_ADDR) sh->value;
692 SYMBOL_TYPE (s) = objfile_type (objfile)->builtin_int;
693 add_symbol (s, top_stack->cur_st, top_stack->cur_block);
696 case stProc: /* Procedure, usually goes into global block. */
697 case stStaticProc: /* Static procedure, goes into current block. */
698 /* For stProc symbol records, we need to check the storage class
699 as well, as only (stProc, scText) entries represent "real"
700 procedures - See the Compaq document titled "Object File /
701 Symbol Table Format Specification" for more information.
702 If the storage class is not scText, we discard the whole block
703 of symbol records for this stProc. */
704 if (sh->st == stProc && sh->sc != scText)
706 char *ext_tsym = ext_sh;
707 int keep_counting = 1;
710 while (keep_counting)
712 ext_tsym += external_sym_size;
713 (*swap_sym_in) (cur_bfd, ext_tsym, &tsym);
723 complaint (&symfile_complaints,
724 _("unknown symbol type 0x%x"), sh->st);
730 s = new_symbol (name);
731 SYMBOL_DOMAIN (s) = VAR_DOMAIN;
732 SYMBOL_ACLASS_INDEX (s) = LOC_BLOCK;
733 /* Type of the return value. */
734 if (SC_IS_UNDEF (sh->sc) || sh->sc == scNil)
735 t = objfile_type (objfile)->builtin_int;
738 t = parse_type (cur_fd, ax, sh->index + 1, 0, bigend, name);
739 if (strcmp (name, "malloc") == 0
740 && TYPE_CODE (t) == TYPE_CODE_VOID)
742 /* I don't know why, but, at least under Alpha GNU/Linux,
743 when linking against a malloc without debugging
744 symbols, its read as a function returning void---this
745 is bad because it means we cannot call functions with
746 string arguments interactively; i.e., "call
747 printf("howdy\n")" would fail with the error message
748 "program has no memory available". To avoid this, we
749 patch up the type and make it void*
750 instead. (davidm@azstarnet.com). */
751 t = make_pointer_type (t, NULL);
754 b = top_stack->cur_block;
755 if (sh->st == stProc)
757 const struct blockvector *bv = BLOCKVECTOR (top_stack->cur_st);
759 /* The next test should normally be true, but provides a
760 hook for nested functions (which we don't want to make
762 if (b == BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK))
763 b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
764 /* Irix 5 sometimes has duplicate names for the same
765 function. We want to add such names up at the global
766 level, not as a nested function. */
767 else if (sh->value == top_stack->procadr)
768 b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
770 add_symbol (s, top_stack->cur_st, b);
772 /* Make a type for the procedure itself. */
773 SYMBOL_TYPE (s) = lookup_function_type (t);
775 /* All functions in C++ have prototypes. For C we don't have enough
776 information in the debug info. */
777 if (SYMBOL_LANGUAGE (s) == language_cplus)
778 TYPE_PROTOTYPED (SYMBOL_TYPE (s)) = 1;
780 /* Create and enter a new lexical context. */
781 b = new_block (FUNCTION_BLOCK);
782 SYMBOL_BLOCK_VALUE (s) = b;
783 BLOCK_FUNCTION (b) = s;
784 BLOCK_START (b) = BLOCK_END (b) = sh->value;
785 BLOCK_SUPERBLOCK (b) = top_stack->cur_block;
786 add_block (b, top_stack->cur_st);
788 /* Not if we only have partial info. */
789 if (SC_IS_UNDEF (sh->sc) || sh->sc == scNil)
793 top_stack->cur_block = b;
794 top_stack->blocktype = sh->st;
795 top_stack->cur_type = SYMBOL_TYPE (s);
796 top_stack->cur_field = -1;
797 top_stack->procadr = sh->value;
798 top_stack->numargs = 0;
801 /* Beginning of code for structure, union, and enum definitions.
802 They all share a common set of local variables, defined here. */
804 enum type_code type_code;
810 case stStruct: /* Start a block defining a struct type. */
811 type_code = TYPE_CODE_STRUCT;
812 goto structured_common;
814 case stUnion: /* Start a block defining a union type. */
815 type_code = TYPE_CODE_UNION;
816 goto structured_common;
818 case stEnum: /* Start a block defining an enum type. */
819 type_code = TYPE_CODE_ENUM;
820 goto structured_common;
822 case stBlock: /* Either a lexical block, or some type. */
823 if (sh->sc != scInfo && !SC_IS_COMMON (sh->sc))
824 goto case_stBlock_code; /* Lexical block */
826 type_code = TYPE_CODE_UNDEF; /* We have a type. */
828 /* Common code for handling struct, union, enum, and/or as-yet-
829 unknown-type blocks of info about structured data. `type_code'
830 has been set to the proper TYPE_CODE, if we know it. */
832 found_ecoff_debugging_info = 1;
834 top_stack->blocktype = stBlock;
836 /* First count the number of fields and the highest value. */
839 for (ext_tsym = ext_sh + external_sym_size;
841 ext_tsym += external_sym_size)
845 (*swap_sym_in) (cur_bfd, ext_tsym, &tsym);
850 /* C++ encodes class types as structures where there the
851 methods are encoded as stProc. The scope of stProc
852 symbols also ends with stEnd, thus creating a risk of
853 taking the wrong stEnd symbol record as the end of
854 the current struct, which would cause GDB to undercount
855 the real number of fields in this struct. To make sure
856 we really reached the right stEnd symbol record, we
857 check the associated name, and match it against the
858 struct name. Since method names are mangled while
859 the class name is not, there is no risk of having a
860 method whose name is identical to the class name
861 (in particular constructor method names are different
862 from the class name). There is therefore no risk that
863 this check stops the count on the StEnd of a method.
865 Also, assume that we're really at the end when tsym.iss
867 if (tsym.iss == issNull
868 || strcmp (debug_info->ss + cur_fdr->issBase + tsym.iss,
874 if (nfields == 0 && type_code == TYPE_CODE_UNDEF)
876 /* If the type of the member is Nil (or Void),
877 without qualifiers, assume the tag is an
879 Alpha cc -migrate enums are recognized by a zero
880 index and a zero symbol value.
881 DU 4.0 cc enums are recognized by a member type of
882 btEnum without qualifiers and a zero symbol value. */
883 if (tsym.index == indexNil
884 || (tsym.index == 0 && sh->value == 0))
885 type_code = TYPE_CODE_ENUM;
888 (*debug_swap->swap_tir_in) (bigend,
889 &ax[tsym.index].a_ti,
891 if ((tir.bt == btNil || tir.bt == btVoid
892 || (tir.bt == btEnum && sh->value == 0))
894 type_code = TYPE_CODE_ENUM;
898 if (tsym.value > max_value)
899 max_value = tsym.value;
908 /* This is a no-op; is it trying to tell us something
909 we should be checking? */
910 if (tsym.sc == scVariant); /*UNIMPLEMENTED */
914 /* This is something like a struct within a
915 struct. Skip over the fields of the inner
916 struct. The -1 is because the for loop will
917 increment ext_tsym. */
918 ext_tsym = ((char *) debug_info->external_sym
919 + ((cur_fdr->isymBase + tsym.index - 1)
920 * external_sym_size));
926 /* mips cc puts out a typedef for struct x if it is not yet
927 defined when it encounters
928 struct y { struct x *xp; };
933 /* Irix5 cc puts out a stIndirect for struct x if it is not
934 yet defined when it encounters
935 struct y { struct x *xp; };
940 complaint (&symfile_complaints,
941 _("declaration block contains "
942 "unhandled symbol type %d"),
948 /* In an stBlock, there is no way to distinguish structs,
949 unions, and enums at this point. This is a bug in the
950 original design (that has been fixed with the recent
951 addition of the stStruct, stUnion, and stEnum symbol
952 types.) The way you can tell is if/when you see a variable
953 or field of that type. In that case the variable's type
954 (in the AUX table) says if the type is struct, union, or
955 enum, and points back to the stBlock here. So you can
956 patch the tag kind up later - but only if there actually is
957 a variable or field of that type.
959 So until we know for sure, we will guess at this point.
961 If the first member has index==indexNil or a void type,
962 assume we have an enumeration.
963 Otherwise, if there is more than one member, and all
964 the members have offset 0, assume we have a union.
965 Otherwise, assume we have a struct.
967 The heuristic could guess wrong in the case of of an
968 enumeration with no members or a union with one (or zero)
969 members, or when all except the last field of a struct have
970 width zero. These are uncommon and/or illegal situations,
971 and in any case guessing wrong probably doesn't matter
974 But if we later do find out we were wrong, we fixup the tag
975 kind. Members of an enumeration must be handled
976 differently from struct/union fields, and that is harder to
977 patch up, but luckily we shouldn't need to. (If there are
978 any enumeration members, we can tell for sure it's an enum
981 if (type_code == TYPE_CODE_UNDEF)
983 if (nfields > 1 && max_value == 0)
984 type_code = TYPE_CODE_UNION;
986 type_code = TYPE_CODE_STRUCT;
989 /* Create a new type or use the pending type. */
990 pend = is_pending_symbol (cur_fdr, ext_sh);
991 if (pend == (struct mdebug_pending *) NULL)
994 add_pending (cur_fdr, ext_sh, t);
999 /* Do not set the tag name if it is a compiler generated tag name
1000 (.Fxx or .xxfake or empty) for unnamed struct/union/enums.
1001 Alpha cc puts out an sh->iss of zero for those. */
1002 if (sh->iss == 0 || name[0] == '.' || name[0] == '\0')
1003 TYPE_TAG_NAME (t) = NULL;
1005 TYPE_TAG_NAME (t) = obconcat (&mdebugread_objfile->objfile_obstack,
1006 name, (char *) NULL);
1008 TYPE_CODE (t) = type_code;
1009 TYPE_LENGTH (t) = sh->value;
1010 TYPE_NFIELDS (t) = nfields;
1011 TYPE_FIELDS (t) = f = ((struct field *)
1013 nfields * sizeof (struct field)));
1015 if (type_code == TYPE_CODE_ENUM)
1017 int unsigned_enum = 1;
1019 /* This is a non-empty enum. */
1021 /* DEC c89 has the number of enumerators in the sh.value field,
1022 not the type length, so we have to compensate for that
1023 incompatibility quirk.
1024 This might do the wrong thing for an enum with one or two
1025 enumerators and gcc -gcoff -fshort-enums, but these cases
1026 are hopefully rare enough.
1027 Alpha cc -migrate has a sh.value field of zero, we adjust
1029 if (TYPE_LENGTH (t) == TYPE_NFIELDS (t)
1030 || TYPE_LENGTH (t) == 0)
1031 TYPE_LENGTH (t) = gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT;
1032 for (ext_tsym = ext_sh + external_sym_size;
1034 ext_tsym += external_sym_size)
1037 struct symbol *enum_sym;
1039 (*swap_sym_in) (cur_bfd, ext_tsym, &tsym);
1041 if (tsym.st != stMember)
1044 SET_FIELD_ENUMVAL (*f, tsym.value);
1045 FIELD_TYPE (*f) = t;
1046 FIELD_NAME (*f) = debug_info->ss + cur_fdr->issBase + tsym.iss;
1047 FIELD_BITSIZE (*f) = 0;
1049 enum_sym = allocate_symbol (mdebugread_objfile);
1050 SYMBOL_SET_LINKAGE_NAME
1052 obstack_copy0 (&mdebugread_objfile->objfile_obstack,
1053 f->name, strlen (f->name)));
1054 SYMBOL_ACLASS_INDEX (enum_sym) = LOC_CONST;
1055 SYMBOL_TYPE (enum_sym) = t;
1056 SYMBOL_DOMAIN (enum_sym) = VAR_DOMAIN;
1057 SYMBOL_VALUE (enum_sym) = tsym.value;
1058 if (SYMBOL_VALUE (enum_sym) < 0)
1060 add_symbol (enum_sym, top_stack->cur_st, top_stack->cur_block);
1062 /* Skip the stMembers that we've handled. */
1067 TYPE_UNSIGNED (t) = 1;
1069 /* Make this the current type. */
1070 top_stack->cur_type = t;
1071 top_stack->cur_field = 0;
1073 /* Do not create a symbol for alpha cc unnamed structs. */
1077 /* gcc puts out an empty struct for an opaque struct definitions,
1078 do not create a symbol for it either. */
1079 if (TYPE_NFIELDS (t) == 0)
1085 s = new_symbol (name);
1086 SYMBOL_DOMAIN (s) = STRUCT_DOMAIN;
1087 SYMBOL_ACLASS_INDEX (s) = LOC_TYPEDEF;
1088 SYMBOL_VALUE (s) = 0;
1089 SYMBOL_TYPE (s) = t;
1090 add_symbol (s, top_stack->cur_st, top_stack->cur_block);
1093 /* End of local variables shared by struct, union, enum, and
1094 block (as yet unknown struct/union/enum) processing. */
1098 found_ecoff_debugging_info = 1;
1099 /* Beginnning of (code) block. Value of symbol
1100 is the displacement from procedure start. */
1101 push_parse_stack ();
1103 /* Do not start a new block if this is the outermost block of a
1104 procedure. This allows the LOC_BLOCK symbol to point to the
1105 block with the local variables, so funcname::var works. */
1106 if (top_stack->blocktype == stProc
1107 || top_stack->blocktype == stStaticProc)
1109 top_stack->blocktype = stNil;
1113 top_stack->blocktype = stBlock;
1114 b = new_block (NON_FUNCTION_BLOCK);
1115 BLOCK_START (b) = sh->value + top_stack->procadr;
1116 BLOCK_SUPERBLOCK (b) = top_stack->cur_block;
1117 top_stack->cur_block = b;
1118 add_block (b, top_stack->cur_st);
1121 case stEnd: /* end (of anything) */
1122 if (sh->sc == scInfo || SC_IS_COMMON (sh->sc))
1124 /* Finished with type */
1125 top_stack->cur_type = 0;
1127 else if (sh->sc == scText &&
1128 (top_stack->blocktype == stProc ||
1129 top_stack->blocktype == stStaticProc))
1131 /* Finished with procedure */
1132 const struct blockvector *bv = BLOCKVECTOR (top_stack->cur_st);
1133 struct mdebug_extra_func_info *e;
1134 struct block *b = top_stack->cur_block;
1135 struct type *ftype = top_stack->cur_type;
1138 BLOCK_END (top_stack->cur_block) += sh->value; /* size */
1140 /* Make up special symbol to contain procedure specific info. */
1141 s = new_symbol (MDEBUG_EFI_SYMBOL_NAME);
1142 SYMBOL_DOMAIN (s) = LABEL_DOMAIN;
1143 SYMBOL_ACLASS_INDEX (s) = LOC_CONST;
1144 SYMBOL_TYPE (s) = objfile_type (mdebugread_objfile)->builtin_void;
1145 e = ((struct mdebug_extra_func_info *)
1146 obstack_alloc (&mdebugread_objfile->objfile_obstack,
1147 sizeof (struct mdebug_extra_func_info)));
1148 memset (e, 0, sizeof (struct mdebug_extra_func_info));
1149 SYMBOL_VALUE_BYTES (s) = (gdb_byte *) e;
1150 e->numargs = top_stack->numargs;
1151 e->pdr.framereg = -1;
1152 add_symbol (s, top_stack->cur_st, top_stack->cur_block);
1154 /* f77 emits proc-level with address bounds==[0,0],
1155 So look for such child blocks, and patch them. */
1156 for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); i++)
1158 struct block *b_bad = BLOCKVECTOR_BLOCK (bv, i);
1160 if (BLOCK_SUPERBLOCK (b_bad) == b
1161 && BLOCK_START (b_bad) == top_stack->procadr
1162 && BLOCK_END (b_bad) == top_stack->procadr)
1164 BLOCK_START (b_bad) = BLOCK_START (b);
1165 BLOCK_END (b_bad) = BLOCK_END (b);
1169 if (TYPE_NFIELDS (ftype) <= 0)
1171 /* No parameter type information is recorded with the function's
1172 type. Set that from the type of the parameter symbols. */
1173 int nparams = top_stack->numargs;
1179 struct block_iterator iter;
1181 TYPE_NFIELDS (ftype) = nparams;
1182 TYPE_FIELDS (ftype) = (struct field *)
1183 TYPE_ALLOC (ftype, nparams * sizeof (struct field));
1186 ALL_BLOCK_SYMBOLS (b, iter, sym)
1188 if (iparams == nparams)
1191 if (SYMBOL_IS_ARGUMENT (sym))
1193 TYPE_FIELD_TYPE (ftype, iparams) = SYMBOL_TYPE (sym);
1194 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
1201 else if (sh->sc == scText && top_stack->blocktype == stBlock)
1203 /* End of (code) block. The value of the symbol is the
1204 displacement from the procedure`s start address of the
1205 end of this block. */
1206 BLOCK_END (top_stack->cur_block) = sh->value + top_stack->procadr;
1208 else if (sh->sc == scText && top_stack->blocktype == stNil)
1210 /* End of outermost block. Pop parse stack and ignore. The
1211 following stEnd of stProc will take care of the block. */
1214 else if (sh->sc == scText && top_stack->blocktype == stFile)
1216 /* End of file. Pop parse stack and ignore. Higher
1217 level code deals with this. */
1221 complaint (&symfile_complaints,
1222 _("stEnd with storage class %d not handled"), sh->sc);
1224 pop_parse_stack (); /* Restore previous lexical context. */
1227 case stMember: /* member of struct or union */
1228 f = &TYPE_FIELDS (top_stack->cur_type)[top_stack->cur_field++];
1229 FIELD_NAME (*f) = name;
1230 SET_FIELD_BITPOS (*f, sh->value);
1232 FIELD_TYPE (*f) = parse_type (cur_fd, ax, sh->index,
1233 &bitsize, bigend, name);
1234 FIELD_BITSIZE (*f) = bitsize;
1237 case stIndirect: /* forward declaration on Irix5 */
1238 /* Forward declarations from Irix5 cc are handled by cross_ref,
1242 case stTypedef: /* type definition */
1243 found_ecoff_debugging_info = 1;
1245 /* Typedefs for forward declarations and opaque structs from alpha cc
1246 are handled by cross_ref, skip them. */
1250 /* Parse the type or use the pending type. */
1251 pend = is_pending_symbol (cur_fdr, ext_sh);
1252 if (pend == (struct mdebug_pending *) NULL)
1254 t = parse_type (cur_fd, ax, sh->index, (int *) NULL, bigend, name);
1255 add_pending (cur_fdr, ext_sh, t);
1260 /* Mips cc puts out a typedef with the name of the struct for forward
1261 declarations. These should not go into the symbol table and
1262 TYPE_NAME should not be set for them.
1263 They can't be distinguished from an intentional typedef to
1264 the same name however:
1266 struct x { int ix; int jx; };
1270 struct xx {int ixx; int jxx; };
1271 generates a cross referencing stTypedef for x and xx.
1272 The user visible effect of this is that the type of a pointer
1273 to struct foo sometimes is given as `foo *' instead of `struct foo *'.
1274 The problem is fixed with alpha cc and Irix5 cc. */
1276 /* However if the typedef cross references to an opaque aggregate, it
1277 is safe to omit it from the symbol table. */
1279 if (has_opaque_xref (cur_fdr, sh))
1281 s = new_symbol (name);
1282 SYMBOL_DOMAIN (s) = VAR_DOMAIN;
1283 SYMBOL_ACLASS_INDEX (s) = LOC_TYPEDEF;
1284 SYMBOL_BLOCK_VALUE (s) = top_stack->cur_block;
1285 SYMBOL_TYPE (s) = t;
1286 add_symbol (s, top_stack->cur_st, top_stack->cur_block);
1288 /* Incomplete definitions of structs should not get a name. */
1289 if (TYPE_NAME (SYMBOL_TYPE (s)) == NULL
1290 && (TYPE_NFIELDS (SYMBOL_TYPE (s)) != 0
1291 || (TYPE_CODE (SYMBOL_TYPE (s)) != TYPE_CODE_STRUCT
1292 && TYPE_CODE (SYMBOL_TYPE (s)) != TYPE_CODE_UNION)))
1294 if (TYPE_CODE (SYMBOL_TYPE (s)) == TYPE_CODE_PTR
1295 || TYPE_CODE (SYMBOL_TYPE (s)) == TYPE_CODE_FUNC)
1297 /* If we are giving a name to a type such as "pointer to
1298 foo" or "function returning foo", we better not set
1299 the TYPE_NAME. If the program contains "typedef char
1300 *caddr_t;", we don't want all variables of type char
1301 * to print as caddr_t. This is not just a
1302 consequence of GDB's type management; CC and GCC (at
1303 least through version 2.4) both output variables of
1304 either type char * or caddr_t with the type
1305 refering to the stTypedef symbol for caddr_t. If a future
1306 compiler cleans this up it GDB is not ready for it
1307 yet, but if it becomes ready we somehow need to
1308 disable this check (without breaking the PCC/GCC2.4
1313 Fortunately, this check seems not to be necessary
1314 for anything except pointers or functions. */
1317 TYPE_NAME (SYMBOL_TYPE (s)) = SYMBOL_LINKAGE_NAME (s);
1321 case stFile: /* file name */
1322 push_parse_stack ();
1323 top_stack->blocktype = sh->st;
1326 /* I`ve never seen these for C */
1328 break; /* register relocation */
1330 break; /* forwarding address */
1332 break; /* constant */
1334 complaint (&symfile_complaints, _("unknown symbol type 0x%x"), sh->st);
1343 static const struct objfile_data *basic_type_data;
1345 static struct type *
1346 basic_type (int bt, struct objfile *objfile)
1348 struct gdbarch *gdbarch = get_objfile_arch (objfile);
1349 struct type **map_bt = objfile_data (objfile, basic_type_data);
1357 map_bt = OBSTACK_CALLOC (&objfile->objfile_obstack,
1358 btMax, struct type *);
1359 set_objfile_data (objfile, basic_type_data, map_bt);
1368 tp = objfile_type (objfile)->builtin_void;
1372 tp = init_type (TYPE_CODE_PTR, 4, TYPE_FLAG_UNSIGNED,
1374 TYPE_TARGET_TYPE (tp) = objfile_type (objfile)->builtin_void;
1378 tp = init_type (TYPE_CODE_INT, 1, 0,
1383 tp = init_type (TYPE_CODE_INT, 1, TYPE_FLAG_UNSIGNED,
1384 "unsigned char", objfile);
1388 tp = init_type (TYPE_CODE_INT, 2, 0,
1393 tp = init_type (TYPE_CODE_INT, 2, TYPE_FLAG_UNSIGNED,
1394 "unsigned short", objfile);
1398 tp = init_type (TYPE_CODE_INT, 4, 0,
1403 tp = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
1404 "unsigned int", objfile);
1408 tp = init_type (TYPE_CODE_INT, 4, 0,
1413 tp = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
1414 "unsigned long", objfile);
1418 tp = init_type (TYPE_CODE_FLT,
1419 gdbarch_float_bit (gdbarch) / TARGET_CHAR_BIT, 0,
1424 tp = init_type (TYPE_CODE_FLT,
1425 gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT, 0,
1430 tp = init_type (TYPE_CODE_COMPLEX,
1431 2 * gdbarch_float_bit (gdbarch) / TARGET_CHAR_BIT, 0,
1432 "complex", objfile);
1433 TYPE_TARGET_TYPE (tp) = basic_type (btFloat, objfile);
1437 tp = init_type (TYPE_CODE_COMPLEX,
1438 2 * gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT, 0,
1439 "double complex", objfile);
1440 TYPE_TARGET_TYPE (tp) = basic_type (btDouble, objfile);
1444 /* We use TYPE_CODE_INT to print these as integers. Does this do any
1445 good? Would we be better off with TYPE_CODE_ERROR? Should
1446 TYPE_CODE_ERROR print things in hex if it knows the size? */
1447 tp = init_type (TYPE_CODE_INT,
1448 gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT, 0,
1449 "fixed decimal", objfile);
1453 tp = init_type (TYPE_CODE_ERROR,
1454 gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT, 0,
1455 "floating decimal", objfile);
1459 /* Is a "string" the way btString means it the same as TYPE_CODE_STRING?
1461 tp = init_type (TYPE_CODE_STRING, 1, 0,
1466 tp = objfile_type (objfile)->builtin_void;
1470 tp = init_type (TYPE_CODE_INT, 8, 0,
1475 tp = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED,
1476 "unsigned long", objfile);
1480 tp = init_type (TYPE_CODE_INT, 8, 0,
1481 "long long", objfile);
1485 tp = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED,
1486 "unsigned long long", objfile);
1490 tp = init_type (TYPE_CODE_PTR, 8, TYPE_FLAG_UNSIGNED,
1492 TYPE_TARGET_TYPE (tp) = objfile_type (objfile)->builtin_void;
1496 tp = init_type (TYPE_CODE_INT, 8, 0,
1501 tp = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED,
1502 "unsigned int", objfile);
1514 /* Parse the type information provided in the raw AX entries for
1515 the symbol SH. Return the bitfield size in BS, in case.
1516 We must byte-swap the AX entries before we use them; BIGEND says whether
1517 they are big-endian or little-endian (from fh->fBigendian). */
1519 static struct type *
1520 parse_type (int fd, union aux_ext *ax, unsigned int aux_index, int *bs,
1521 int bigend, char *sym_name)
1524 struct type *tp = 0;
1525 enum type_code type_code = TYPE_CODE_UNDEF;
1527 /* Handle undefined types, they have indexNil. */
1528 if (aux_index == indexNil)
1529 return basic_type (btInt, mdebugread_objfile);
1531 /* Handle corrupt aux indices. */
1532 if (aux_index >= (debug_info->fdr + fd)->caux)
1534 index_complaint (sym_name);
1535 return basic_type (btInt, mdebugread_objfile);
1539 /* Use aux as a type information record, map its basic type. */
1540 (*debug_swap->swap_tir_in) (bigend, &ax->a_ti, t);
1541 tp = basic_type (t->bt, mdebugread_objfile);
1544 /* Cannot use builtin types -- build our own. */
1548 type_code = TYPE_CODE_STRUCT;
1551 type_code = TYPE_CODE_UNION;
1554 type_code = TYPE_CODE_ENUM;
1557 type_code = TYPE_CODE_RANGE;
1560 type_code = TYPE_CODE_SET;
1563 /* alpha cc -migrate uses this for typedefs. The true type will
1564 be obtained by crossreferencing below. */
1565 type_code = TYPE_CODE_ERROR;
1568 /* alpha cc uses this for typedefs. The true type will be
1569 obtained by crossreferencing below. */
1570 type_code = TYPE_CODE_ERROR;
1573 basic_type_complaint (t->bt, sym_name);
1574 return basic_type (btInt, mdebugread_objfile);
1578 /* Move on to next aux. */
1583 int width = AUX_GET_WIDTH (bigend, ax);
1585 /* Inhibit core dumps if TIR is corrupted. */
1586 if (bs == (int *) NULL)
1588 /* Alpha cc -migrate encodes char and unsigned char types
1589 as short and unsigned short types with a field width of 8.
1590 Enum types also have a field width which we ignore for now. */
1591 if (t->bt == btShort && width == 8)
1592 tp = basic_type (btChar, mdebugread_objfile);
1593 else if (t->bt == btUShort && width == 8)
1594 tp = basic_type (btUChar, mdebugread_objfile);
1595 else if (t->bt == btEnum)
1598 complaint (&symfile_complaints,
1599 _("can't handle TIR fBitfield for %s"),
1607 /* A btIndirect entry cross references to an aux entry containing
1609 if (t->bt == btIndirect)
1616 (*debug_swap->swap_rndx_in) (bigend, &ax->a_rndx, rn);
1618 if (rn->rfd == 0xfff)
1620 rf = AUX_GET_ISYM (bigend, ax);
1628 complaint (&symfile_complaints,
1629 _("unable to cross ref btIndirect for %s"), sym_name);
1630 return basic_type (btInt, mdebugread_objfile);
1632 xref_fh = get_rfd (fd, rf);
1633 xref_fd = xref_fh - debug_info->fdr;
1634 tp = parse_type (xref_fd, debug_info->external_aux + xref_fh->iauxBase,
1635 rn->index, (int *) NULL, xref_fh->fBigendian, sym_name);
1638 /* All these types really point to some (common) MIPS type
1639 definition, and only the type-qualifiers fully identify
1640 them. We'll make the same effort at sharing. */
1641 if (t->bt == btStruct ||
1645 /* btSet (I think) implies that the name is a tag name, not a typedef
1646 name. This apparently is a MIPS extension for C sets. */
1651 /* Try to cross reference this type, build new type on failure. */
1652 ax += cross_ref (fd, ax, &tp, type_code, &name, bigend, sym_name);
1653 if (tp == (struct type *) NULL)
1654 tp = init_type (type_code, 0, 0, (char *) NULL, mdebugread_objfile);
1656 /* DEC c89 produces cross references to qualified aggregate types,
1657 dereference them. */
1658 while (TYPE_CODE (tp) == TYPE_CODE_PTR
1659 || TYPE_CODE (tp) == TYPE_CODE_ARRAY)
1660 tp = TYPE_TARGET_TYPE (tp);
1662 /* Make sure that TYPE_CODE(tp) has an expected type code.
1663 Any type may be returned from cross_ref if file indirect entries
1665 if (TYPE_CODE (tp) != TYPE_CODE_STRUCT
1666 && TYPE_CODE (tp) != TYPE_CODE_UNION
1667 && TYPE_CODE (tp) != TYPE_CODE_ENUM)
1669 unexpected_type_code_complaint (sym_name);
1673 /* Usually, TYPE_CODE(tp) is already type_code. The main
1674 exception is if we guessed wrong re struct/union/enum.
1675 But for struct vs. union a wrong guess is harmless, so
1676 don't complain(). */
1677 if ((TYPE_CODE (tp) == TYPE_CODE_ENUM
1678 && type_code != TYPE_CODE_ENUM)
1679 || (TYPE_CODE (tp) != TYPE_CODE_ENUM
1680 && type_code == TYPE_CODE_ENUM))
1682 bad_tag_guess_complaint (sym_name);
1685 if (TYPE_CODE (tp) != type_code)
1687 TYPE_CODE (tp) = type_code;
1690 /* Do not set the tag name if it is a compiler generated tag name
1691 (.Fxx or .xxfake or empty) for unnamed struct/union/enums. */
1692 if (name[0] == '.' || name[0] == '\0')
1693 TYPE_TAG_NAME (tp) = NULL;
1694 else if (TYPE_TAG_NAME (tp) == NULL
1695 || strcmp (TYPE_TAG_NAME (tp), name) != 0)
1697 = obstack_copy0 (&mdebugread_objfile->objfile_obstack,
1698 name, strlen (name));
1702 /* All these types really point to some (common) MIPS type
1703 definition, and only the type-qualifiers fully identify
1704 them. We'll make the same effort at sharing.
1705 FIXME: We are not doing any guessing on range types. */
1706 if (t->bt == btRange)
1710 /* Try to cross reference this type, build new type on failure. */
1711 ax += cross_ref (fd, ax, &tp, type_code, &name, bigend, sym_name);
1712 if (tp == (struct type *) NULL)
1713 tp = init_type (type_code, 0, 0, (char *) NULL, mdebugread_objfile);
1715 /* Make sure that TYPE_CODE(tp) has an expected type code.
1716 Any type may be returned from cross_ref if file indirect entries
1718 if (TYPE_CODE (tp) != TYPE_CODE_RANGE)
1720 unexpected_type_code_complaint (sym_name);
1724 /* Usually, TYPE_CODE(tp) is already type_code. The main
1725 exception is if we guessed wrong re struct/union/enum. */
1726 if (TYPE_CODE (tp) != type_code)
1728 bad_tag_guess_complaint (sym_name);
1729 TYPE_CODE (tp) = type_code;
1731 if (TYPE_NAME (tp) == NULL
1732 || strcmp (TYPE_NAME (tp), name) != 0)
1734 = obstack_copy0 (&mdebugread_objfile->objfile_obstack,
1735 name, strlen (name));
1738 if (t->bt == btTypedef)
1742 /* Try to cross reference this type, it should succeed. */
1743 ax += cross_ref (fd, ax, &tp, type_code, &name, bigend, sym_name);
1744 if (tp == (struct type *) NULL)
1746 complaint (&symfile_complaints,
1747 _("unable to cross ref btTypedef for %s"), sym_name);
1748 tp = basic_type (btInt, mdebugread_objfile);
1752 /* Deal with range types. */
1753 if (t->bt == btRange)
1755 TYPE_NFIELDS (tp) = 0;
1756 TYPE_RANGE_DATA (tp) = ((struct range_bounds *)
1757 TYPE_ZALLOC (tp, sizeof (struct range_bounds)));
1758 TYPE_LOW_BOUND (tp) = AUX_GET_DNLOW (bigend, ax);
1760 TYPE_HIGH_BOUND (tp) = AUX_GET_DNHIGH (bigend, ax);
1764 /* Parse all the type qualifiers now. If there are more
1765 than 6 the game will continue in the next aux. */
1769 #define PARSE_TQ(tq) \
1770 if (t->tq != tqNil) \
1771 ax += upgrade_type(fd, &tp, t->tq, ax, bigend, sym_name); \
1783 /* mips cc 2.x and gcc never put out continued aux entries. */
1787 (*debug_swap->swap_tir_in) (bigend, &ax->a_ti, t);
1791 /* Complain for illegal continuations due to corrupt aux entries. */
1793 complaint (&symfile_complaints,
1794 _("illegal TIR continued for %s"), sym_name);
1799 /* Make up a complex type from a basic one. Type is passed by
1800 reference in TPP and side-effected as necessary. The type
1801 qualifier TQ says how to handle the aux symbols at AX for
1802 the symbol SX we are currently analyzing. BIGEND says whether
1803 aux symbols are big-endian or little-endian.
1804 Returns the number of aux symbols we parsed. */
1807 upgrade_type (int fd, struct type **tpp, int tq, union aux_ext *ax, int bigend,
1813 /* Used in array processing. */
1824 t = lookup_pointer_type (*tpp);
1829 t = lookup_function_type (*tpp);
1836 /* Determine and record the domain type (type of index). */
1837 (*debug_swap->swap_rndx_in) (bigend, &ax->a_rndx, &rndx);
1843 rf = AUX_GET_ISYM (bigend, ax);
1846 fh = get_rfd (fd, rf);
1848 indx = parse_type (fh - debug_info->fdr,
1849 debug_info->external_aux + fh->iauxBase,
1850 id, (int *) NULL, bigend, sym_name);
1852 /* The bounds type should be an integer type, but might be anything
1853 else due to corrupt aux entries. */
1854 if (TYPE_CODE (indx) != TYPE_CODE_INT)
1856 complaint (&symfile_complaints,
1857 _("illegal array index type for %s, assuming int"),
1859 indx = objfile_type (mdebugread_objfile)->builtin_int;
1862 /* Get the bounds, and create the array type. */
1864 lower = AUX_GET_DNLOW (bigend, ax);
1866 upper = AUX_GET_DNHIGH (bigend, ax);
1868 rf = AUX_GET_WIDTH (bigend, ax); /* bit size of array element */
1870 range = create_static_range_type ((struct type *) NULL, indx,
1873 t = create_array_type ((struct type *) NULL, *tpp, range);
1875 /* We used to fill in the supplied array element bitsize
1876 here if the TYPE_LENGTH of the target type was zero.
1877 This happens for a `pointer to an array of anonymous structs',
1878 but in this case the array element bitsize is also zero,
1879 so nothing is gained.
1880 And we used to check the TYPE_LENGTH of the target type against
1881 the supplied array element bitsize.
1882 gcc causes a mismatch for `pointer to array of object',
1883 since the sdb directives it uses do not have a way of
1884 specifying the bitsize, but it does no harm (the
1885 TYPE_LENGTH should be correct) and we should be able to
1886 ignore the erroneous bitsize from the auxiliary entry safely.
1887 dbx seems to ignore it too. */
1889 /* TYPE_TARGET_STUB now takes care of the zero TYPE_LENGTH problem. */
1890 if (TYPE_LENGTH (*tpp) == 0)
1891 TYPE_TARGET_STUB (t) = 1;
1897 /* Volatile -- currently ignored */
1901 /* Const -- currently ignored */
1905 complaint (&symfile_complaints, _("unknown type qualifier 0x%x"), tq);
1911 /* Parse a procedure descriptor record PR. Note that the procedure is
1912 parsed _after_ the local symbols, now we just insert the extra
1913 information we need into a MDEBUG_EFI_SYMBOL_NAME symbol that has
1914 already been placed in the procedure's main block. Note also that
1915 images that have been partially stripped (ld -x) have been deprived
1916 of local symbols, and we have to cope with them here. FIRST_OFF is
1917 the offset of the first procedure for this FDR; we adjust the
1918 address by this amount, but I don't know why. SEARCH_SYMTAB is the symtab
1919 to look for the function which contains the MDEBUG_EFI_SYMBOL_NAME symbol
1920 in question, or NULL to use top_stack->cur_block. */
1922 static void parse_procedure (PDR *, struct symtab *, struct partial_symtab *);
1925 parse_procedure (PDR *pr, struct symtab *search_symtab,
1926 struct partial_symtab *pst)
1928 struct symbol *s, *i;
1929 const struct block *b;
1932 /* Simple rule to find files linked "-x". */
1933 if (cur_fdr->rss == -1)
1937 /* Static procedure at address pr->adr. Sigh. */
1938 /* FIXME-32x64. assuming pr->adr fits in long. */
1939 complaint (&symfile_complaints,
1940 _("can't handle PDR for static proc at 0x%lx"),
1941 (unsigned long) pr->adr);
1949 (*debug_swap->swap_ext_in) (cur_bfd,
1950 ((char *) debug_info->external_ext
1952 * debug_swap->external_ext_size)),
1954 sh_name = debug_info->ssext + she.asym.iss;
1962 (*debug_swap->swap_sym_in) (cur_bfd,
1963 ((char *) debug_info->external_sym
1964 + ((cur_fdr->isymBase + pr->isym)
1965 * debug_swap->external_sym_size)),
1967 sh_name = debug_info->ss + cur_fdr->issBase + sh.iss;
1970 if (search_symtab != NULL)
1973 /* This loses both in the case mentioned (want a static, find a global),
1974 but also if we are looking up a non-mangled name which happens to
1975 match the name of a mangled function. */
1976 /* We have to save the cur_fdr across the call to lookup_symbol.
1977 If the pdr is for a static function and if a global function with
1978 the same name exists, lookup_symbol will eventually read in the symtab
1979 for the global function and clobber cur_fdr. */
1980 FDR *save_cur_fdr = cur_fdr;
1982 s = lookup_symbol (sh_name, NULL, VAR_DOMAIN, 0);
1983 cur_fdr = save_cur_fdr;
1987 BLOCKVECTOR_BLOCK (BLOCKVECTOR (search_symtab), STATIC_BLOCK),
1993 s = mylookup_symbol (sh_name, top_stack->cur_block,
1994 VAR_DOMAIN, LOC_BLOCK);
1998 b = SYMBOL_BLOCK_VALUE (s);
2002 complaint (&symfile_complaints, _("PDR for %s, but no symbol"), sh_name);
2006 /* FIXME -- delete. We can't do symbol allocation now; it's all done. */
2007 s = new_symbol (sh_name);
2008 SYMBOL_DOMAIN (s) = VAR_DOMAIN;
2009 SYMBOL_CLASS (s) = LOC_BLOCK;
2010 /* Donno its type, hope int is ok. */
2012 = lookup_function_type (objfile_type (pst->objfile)->builtin_int);
2013 add_symbol (s, top_stack->cur_st, top_stack->cur_block);
2014 /* Won't have symbols for this one. */
2016 SYMBOL_BLOCK_VALUE (s) = b;
2017 BLOCK_FUNCTION (b) = s;
2018 BLOCK_START (b) = pr->adr;
2019 /* BOUND used to be the end of procedure's text, but the
2020 argument is no longer passed in. */
2021 BLOCK_END (b) = bound;
2022 BLOCK_SUPERBLOCK (b) = top_stack->cur_block;
2023 add_block (b, top_stack->cur_st);
2027 i = mylookup_symbol (MDEBUG_EFI_SYMBOL_NAME, b, LABEL_DOMAIN, LOC_CONST);
2031 struct mdebug_extra_func_info *e;
2033 e = (struct mdebug_extra_func_info *) SYMBOL_VALUE_BYTES (i);
2036 /* GDB expects the absolute function start address for the
2037 procedure descriptor in e->pdr.adr.
2038 As the address in the procedure descriptor is usually relative,
2039 we would have to relocate e->pdr.adr with cur_fdr->adr and
2040 ANOFFSET (pst->section_offsets, SECT_OFF_TEXT (pst->objfile)).
2041 Unfortunately cur_fdr->adr and e->pdr.adr are both absolute
2042 in shared libraries on some systems, and on other systems
2043 e->pdr.adr is sometimes offset by a bogus value.
2044 To work around these problems, we replace e->pdr.adr with
2045 the start address of the function. */
2046 e->pdr.adr = BLOCK_START (b);
2049 /* It would be reasonable that functions that have been compiled
2050 without debugging info have a btNil type for their return value,
2051 and functions that are void and are compiled with debugging info
2053 gcc and DEC f77 put out btNil types for both cases, so btNil is mapped
2054 to TYPE_CODE_VOID in parse_type to get the `compiled with debugging info'
2056 The glevel field in cur_fdr could be used to determine the presence
2057 of debugging info, but GCC doesn't always pass the -g switch settings
2058 to the assembler and GAS doesn't set the glevel field from the -g switch
2060 To work around these problems, the return value type of a TYPE_CODE_VOID
2061 function is adjusted accordingly if no debugging info was found in the
2062 compilation unit. */
2064 if (processing_gcc_compilation == 0
2065 && found_ecoff_debugging_info == 0
2066 && TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (s))) == TYPE_CODE_VOID)
2067 SYMBOL_TYPE (s) = objfile_type (mdebugread_objfile)->nodebug_text_symbol;
2070 /* Parse the external symbol ES. Just call parse_symbol() after
2071 making sure we know where the aux are for it.
2072 BIGEND says whether aux entries are big-endian or little-endian.
2074 This routine clobbers top_stack->cur_block and ->cur_st. */
2076 static void parse_external (EXTR *, int, struct section_offsets *,
2080 parse_external (EXTR *es, int bigend, struct section_offsets *section_offsets,
2081 struct objfile *objfile)
2085 if (es->ifd != ifdNil)
2088 cur_fdr = debug_info->fdr + cur_fd;
2089 ax = debug_info->external_aux + cur_fdr->iauxBase;
2093 cur_fdr = debug_info->fdr;
2097 /* Reading .o files */
2098 if (SC_IS_UNDEF (es->asym.sc) || es->asym.sc == scNil)
2101 switch (es->asym.st)
2104 /* These are generated for static symbols in .o files,
2125 /* FIXME: Turn this into a complaint? */
2127 printf_filtered (_("Warning: %s `%s' is undefined (in %s)\n"),
2128 what, debug_info->ssext + es->asym.iss,
2129 fdr_name (cur_fdr));
2133 switch (es->asym.st)
2137 /* There is no need to parse the external procedure symbols.
2138 If they are from objects compiled without -g, their index will
2139 be indexNil, and the symbol definition from the minimal symbol
2140 is preferrable (yielding a function returning int instead of int).
2141 If the index points to a local procedure symbol, the local
2142 symbol already provides the correct type.
2143 Note that the index of the external procedure symbol points
2144 to the local procedure symbol in the local symbol table, and
2145 _not_ to the auxiliary symbol info. */
2149 /* Global common symbols are resolved by the runtime loader,
2151 if (SC_IS_COMMON (es->asym.sc))
2154 /* Note that the case of a symbol with indexNil must be handled
2155 anyways by parse_symbol(). */
2156 parse_symbol (&es->asym, ax, (char *) NULL,
2157 bigend, section_offsets, objfile);
2164 /* Parse the line number info for file descriptor FH into
2165 GDB's linetable LT. MIPS' encoding requires a little bit
2166 of magic to get things out. Note also that MIPS' line
2167 numbers can go back and forth, apparently we can live
2168 with that and do not need to reorder our linetables. */
2170 static void parse_lines (FDR *, PDR *, struct linetable *, int,
2171 struct partial_symtab *, CORE_ADDR);
2174 parse_lines (FDR *fh, PDR *pr, struct linetable *lt, int maxlines,
2175 struct partial_symtab *pst, CORE_ADDR lowest_pdr_addr)
2177 unsigned char *base;
2179 int delta, count, lineno = 0;
2181 if (fh->cbLine == 0)
2184 /* Scan by procedure descriptors. */
2186 for (j = 0; j < fh->cpd; j++, pr++)
2190 unsigned char *halt;
2192 /* No code for this one. */
2193 if (pr->iline == ilineNil ||
2194 pr->lnLow == -1 || pr->lnHigh == -1)
2197 /* Determine start and end address of compressed line bytes for
2199 base = debug_info->line + fh->cbLineOffset;
2200 if (j != (fh->cpd - 1))
2201 halt = base + pr[1].cbLineOffset;
2203 halt = base + fh->cbLine;
2204 base += pr->cbLineOffset;
2206 adr = pst->textlow + pr->adr - lowest_pdr_addr;
2208 l = adr >> 2; /* in words */
2209 for (lineno = pr->lnLow; base < halt;)
2211 count = *base & 0x0f;
2212 delta = *base++ >> 4;
2217 delta = (base[0] << 8) | base[1];
2218 if (delta >= 0x8000)
2222 lineno += delta; /* first delta is 0 */
2224 /* Complain if the line table overflows. Could happen
2225 with corrupt binaries. */
2226 if (lt->nitems >= maxlines)
2228 complaint (&symfile_complaints,
2229 _("guessed size of linetable for %s incorrectly"),
2233 k = add_line (lt, lineno, l, k);
2240 function_outside_compilation_unit_complaint (const char *arg1)
2242 complaint (&symfile_complaints,
2243 _("function `%s' appears to be defined "
2244 "outside of all compilation units"),
2248 /* Use the STORAGE_CLASS to compute which section the given symbol
2249 belongs to, and then records this new minimal symbol. */
2252 record_minimal_symbol (const char *name, const CORE_ADDR address,
2253 enum minimal_symbol_type ms_type, int storage_class,
2254 struct objfile *objfile)
2258 switch (storage_class)
2261 section = SECT_OFF_TEXT (objfile);
2264 section = SECT_OFF_DATA (objfile);
2267 section = SECT_OFF_BSS (objfile);
2270 section = get_section_index (objfile, ".sdata");
2273 section = get_section_index (objfile, ".sbss");
2276 section = get_section_index (objfile, ".rdata");
2279 section = get_section_index (objfile, ".init");
2282 section = get_section_index (objfile, ".xdata");
2285 section = get_section_index (objfile, ".pdata");
2288 section = get_section_index (objfile, ".fini");
2291 section = get_section_index (objfile, ".rconst");
2295 section = get_section_index (objfile, ".tlsdata");
2300 section = get_section_index (objfile, ".tlsbss");
2304 /* This kind of symbol is not associated to a section. */
2308 prim_record_minimal_symbol_and_info (name, address, ms_type,
2312 /* Master parsing procedure for first-pass reading of file symbols
2313 into a partial_symtab. */
2316 parse_partial_symbols (struct objfile *objfile)
2318 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2319 const bfd_size_type external_sym_size = debug_swap->external_sym_size;
2320 const bfd_size_type external_rfd_size = debug_swap->external_rfd_size;
2321 const bfd_size_type external_ext_size = debug_swap->external_ext_size;
2322 void (*const swap_ext_in) (bfd *, void *, EXTR *) = debug_swap->swap_ext_in;
2323 void (*const swap_sym_in) (bfd *, void *, SYMR *) = debug_swap->swap_sym_in;
2324 void (*const swap_rfd_in) (bfd *, void *, RFDT *) = debug_swap->swap_rfd_in;
2326 HDRR *hdr = &debug_info->symbolic_header;
2327 /* Running pointers */
2335 struct partial_symtab *pst;
2336 int textlow_not_set = 1;
2337 int past_first_source_file = 0;
2339 /* List of current psymtab's include files. */
2340 const char **psymtab_include_list;
2341 int includes_allocated;
2344 struct pst_map *fdr_to_pst;
2345 /* Index within current psymtab dependency list. */
2346 struct partial_symtab **dependency_list;
2347 int dependencies_used, dependencies_allocated;
2348 struct cleanup *old_chain;
2350 enum language prev_language;
2351 asection *text_sect;
2352 int relocatable = 0;
2354 /* Irix 5.2 shared libraries have a fh->adr field of zero, but
2355 the shared libraries are prelinked at a high memory address.
2356 We have to adjust the start address of the object file for this case,
2357 by setting it to the start address of the first procedure in the file.
2358 But we should do no adjustments if we are debugging a .o file, where
2359 the text section (and fh->adr) really starts at zero. */
2360 text_sect = bfd_get_section_by_name (cur_bfd, ".text");
2361 if (text_sect != NULL
2362 && (bfd_get_section_flags (cur_bfd, text_sect) & SEC_RELOC))
2365 extern_tab = (EXTR *) obstack_alloc (&objfile->objfile_obstack,
2366 sizeof (EXTR) * hdr->iextMax);
2368 includes_allocated = 30;
2370 psymtab_include_list = (const char **) alloca (includes_allocated *
2371 sizeof (const char *));
2372 next_symbol_text_func = mdebug_next_symbol_text;
2374 dependencies_allocated = 30;
2375 dependencies_used = 0;
2377 (struct partial_symtab **) alloca (dependencies_allocated *
2378 sizeof (struct partial_symtab *));
2380 set_last_source_file (NULL);
2385 * Only parse the Local and External symbols, and the Relative FDR.
2386 * Fixup enough of the loader symtab to be able to use it.
2387 * Allocate space only for the file's portions we need to
2392 max_glevel = MIN_GLEVEL;
2394 /* Allocate the map FDR -> PST.
2395 Minor hack: -O3 images might claim some global data belongs
2396 to FDR -1. We`ll go along with that. */
2397 fdr_to_pst = (struct pst_map *)
2398 xzalloc ((hdr->ifdMax + 1) * sizeof *fdr_to_pst);
2399 old_chain = make_cleanup (xfree, fdr_to_pst);
2402 struct partial_symtab *pst = new_psymtab ("", objfile);
2404 fdr_to_pst[-1].pst = pst;
2408 /* Allocate the global pending list. */
2410 ((struct mdebug_pending **)
2411 obstack_alloc (&objfile->objfile_obstack,
2412 hdr->ifdMax * sizeof (struct mdebug_pending *)));
2413 memset (pending_list, 0,
2414 hdr->ifdMax * sizeof (struct mdebug_pending *));
2416 /* Pass 0 over external syms: swap them in. */
2417 ext_block = (EXTR *) xmalloc (hdr->iextMax * sizeof (EXTR));
2418 make_cleanup (xfree, ext_block);
2420 ext_out = (char *) debug_info->external_ext;
2421 ext_out_end = ext_out + hdr->iextMax * external_ext_size;
2423 for (; ext_out < ext_out_end; ext_out += external_ext_size, ext_in++)
2424 (*swap_ext_in) (cur_bfd, ext_out, ext_in);
2426 /* Pass 1 over external syms: Presize and partition the list. */
2428 ext_in_end = ext_in + hdr->iextMax;
2429 for (; ext_in < ext_in_end; ext_in++)
2431 /* See calls to complain below. */
2432 if (ext_in->ifd >= -1
2433 && ext_in->ifd < hdr->ifdMax
2434 && ext_in->asym.iss >= 0
2435 && ext_in->asym.iss < hdr->issExtMax)
2436 fdr_to_pst[ext_in->ifd].n_globals++;
2439 /* Pass 1.5 over files: partition out global symbol space. */
2441 for (f_idx = -1; f_idx < hdr->ifdMax; f_idx++)
2443 fdr_to_pst[f_idx].globals_offset = s_idx;
2444 s_idx += fdr_to_pst[f_idx].n_globals;
2445 fdr_to_pst[f_idx].n_globals = 0;
2450 For ECOFF in ELF, we skip the creation of the minimal symbols.
2451 The ECOFF symbols should be a subset of the Elf symbols, and the
2452 section information of the elf symbols will be more accurate.
2453 FIXME! What about Irix 5's native linker?
2455 By default, Elf sections which don't exist in ECOFF
2456 get put in ECOFF's absolute section by the gnu linker.
2457 Since absolute sections don't get relocated, we
2458 end up calculating an address different from that of
2459 the symbol's minimal symbol (created earlier from the
2462 To fix this, either :
2463 1) don't create the duplicate symbol
2464 (assumes ECOFF symtab is a subset of the ELF symtab;
2465 assumes no side-effects result from ignoring ECOFF symbol)
2466 2) create it, only if lookup for existing symbol in ELF's minimal
2469 assumes no side-effects result from ignoring ECOFF symbol)
2470 3) create it, but lookup ELF's minimal symbol and use it's section
2471 during relocation, then modify "uniqify" phase to merge and
2472 eliminate the duplicate symbol
2473 (highly inefficient)
2475 I've implemented #1 here...
2476 Skip the creation of the minimal symbols based on the ECOFF
2479 /* Pass 2 over external syms: fill in external symbols. */
2481 ext_in_end = ext_in + hdr->iextMax;
2482 for (; ext_in < ext_in_end; ext_in++)
2484 enum minimal_symbol_type ms_type = mst_text;
2485 CORE_ADDR svalue = ext_in->asym.value;
2487 /* The Irix 5 native tools seem to sometimes generate bogus
2488 external symbols. */
2489 if (ext_in->ifd < -1 || ext_in->ifd >= hdr->ifdMax)
2491 complaint (&symfile_complaints,
2492 _("bad ifd for external symbol: %d (max %ld)"),
2493 ext_in->ifd, hdr->ifdMax);
2496 if (ext_in->asym.iss < 0 || ext_in->asym.iss >= hdr->issExtMax)
2498 complaint (&symfile_complaints,
2499 _("bad iss for external symbol: %ld (max %ld)"),
2500 ext_in->asym.iss, hdr->issExtMax);
2504 extern_tab[fdr_to_pst[ext_in->ifd].globals_offset
2505 + fdr_to_pst[ext_in->ifd].n_globals++] = *ext_in;
2508 if (SC_IS_UNDEF (ext_in->asym.sc) || ext_in->asym.sc == scNil)
2512 /* Pass 3 over files, over local syms: fill in static symbols. */
2513 name = debug_info->ssext + ext_in->asym.iss;
2515 /* Process ECOFF Symbol Types and Storage Classes. */
2516 switch (ext_in->asym.st)
2519 /* Beginnning of Procedure */
2522 /* Load time only static procs */
2523 ms_type = mst_file_text;
2526 /* External symbol */
2527 if (SC_IS_COMMON (ext_in->asym.sc))
2529 /* The value of a common symbol is its size, not its address.
2533 else if (SC_IS_DATA (ext_in->asym.sc))
2537 else if (SC_IS_BSS (ext_in->asym.sc))
2541 else if (SC_IS_SBSS (ext_in->asym.sc))
2551 /* On certain platforms, some extra label symbols can be
2552 generated by the linker. One possible usage for this kind
2553 of symbols is to represent the address of the begining of a
2554 given section. For instance, on Tru64 5.1, the address of
2555 the _ftext label is the start address of the .text section.
2557 The storage class of these symbols is usually directly
2558 related to the section to which the symbol refers. For
2559 instance, on Tru64 5.1, the storage class for the _fdata
2560 label is scData, refering to the .data section.
2562 It is actually possible that the section associated to the
2563 storage class of the label does not exist. On True64 5.1
2564 for instance, the libm.so shared library does not contain
2565 any .data section, although it contains a _fpdata label
2566 which storage class is scData... Since these symbols are
2567 usually useless for the debugger user anyway, we just
2568 discard these symbols. */
2570 if (SC_IS_TEXT (ext_in->asym.sc))
2572 if (objfile->sect_index_text == -1)
2575 ms_type = mst_file_text;
2577 else if (SC_IS_DATA (ext_in->asym.sc))
2579 if (objfile->sect_index_data == -1)
2582 ms_type = mst_file_data;
2584 else if (SC_IS_BSS (ext_in->asym.sc))
2586 if (objfile->sect_index_bss == -1)
2589 ms_type = mst_file_bss;
2591 else if (SC_IS_SBSS (ext_in->asym.sc))
2593 const int sbss_sect_index = get_section_index (objfile, ".sbss");
2595 if (sbss_sect_index == -1)
2598 ms_type = mst_file_bss;
2605 /* The alpha has the section start addresses in stLocal symbols
2606 whose name starts with a `.'. Skip those but complain for all
2607 other stLocal symbols.
2608 Irix6 puts the section start addresses in stNil symbols, skip
2614 ms_type = mst_unknown;
2615 unknown_ext_complaint (name);
2617 if (!ECOFF_IN_ELF (cur_bfd))
2618 record_minimal_symbol (name, svalue, ms_type, ext_in->asym.sc,
2622 /* Pass 3 over files, over local syms: fill in static symbols. */
2623 for (f_idx = 0; f_idx < hdr->ifdMax; f_idx++)
2625 struct partial_symtab *save_pst;
2629 cur_fdr = fh = debug_info->fdr + f_idx;
2633 fdr_to_pst[f_idx].pst = NULL;
2637 /* Determine the start address for this object file from the
2638 file header and relocate it, except for Irix 5.2 zero fh->adr. */
2642 if (relocatable || textlow != 0)
2643 textlow += ANOFFSET (objfile->section_offsets,
2644 SECT_OFF_TEXT (objfile));
2648 pst = start_psymtab_common (objfile, objfile->section_offsets,
2651 objfile->global_psymbols.next,
2652 objfile->static_psymbols.next);
2653 pst->read_symtab_private = obstack_alloc (&objfile->objfile_obstack,
2654 sizeof (struct symloc));
2655 memset (pst->read_symtab_private, 0, sizeof (struct symloc));
2658 FDR_IDX (pst) = f_idx;
2659 CUR_BFD (pst) = cur_bfd;
2660 DEBUG_SWAP (pst) = debug_swap;
2661 DEBUG_INFO (pst) = debug_info;
2662 PENDING_LIST (pst) = pending_list;
2664 /* The way to turn this into a symtab is to call... */
2665 pst->read_symtab = mdebug_read_symtab;
2667 /* Set up language for the pst.
2668 The language from the FDR is used if it is unambigious (e.g. cfront
2669 with native cc and g++ will set the language to C).
2670 Otherwise we have to deduce the language from the filename.
2671 Native ecoff has every header file in a separate FDR, so
2672 deduce_language_from_filename will return language_unknown for
2673 a header file, which is not what we want.
2674 But the FDRs for the header files are after the FDR for the source
2675 file, so we can assign the language of the source file to the
2676 following header files. Then we save the language in the private
2677 pst data so that we can reuse it when building symtabs. */
2678 prev_language = psymtab_language;
2682 case langCplusplusV2:
2683 psymtab_language = language_cplus;
2686 psymtab_language = deduce_language_from_filename (fdr_name (fh));
2689 if (psymtab_language == language_unknown)
2690 psymtab_language = prev_language;
2691 PST_PRIVATE (pst)->pst_language = psymtab_language;
2693 pst->texthigh = pst->textlow;
2695 /* For stabs-in-ecoff files, the second symbol must be @stab.
2696 This symbol is emitted by mips-tfile to signal that the
2697 current object file uses encapsulated stabs instead of mips
2698 ecoff for local symbols. (It is the second symbol because
2699 the first symbol is the stFile used to signal the start of a
2701 processing_gcc_compilation = 0;
2704 (*swap_sym_in) (cur_bfd,
2705 ((char *) debug_info->external_sym
2706 + (fh->isymBase + 1) * external_sym_size),
2708 if (strcmp (debug_info->ss + fh->issBase + sh.iss,
2710 processing_gcc_compilation = 2;
2713 if (processing_gcc_compilation != 0)
2715 for (cur_sdx = 2; cur_sdx < fh->csym; cur_sdx++)
2718 const char *namestring;
2720 (*swap_sym_in) (cur_bfd,
2721 (((char *) debug_info->external_sym)
2722 + (fh->isymBase + cur_sdx) * external_sym_size),
2724 type_code = ECOFF_UNMARK_STAB (sh.index);
2725 if (!ECOFF_IS_STAB (&sh))
2727 if (sh.st == stProc || sh.st == stStaticProc)
2732 if (sh.st == stStaticProc)
2734 namestring = debug_info->ss + fh->issBase + sh.iss;
2735 record_minimal_symbol (namestring, sh.value,
2736 mst_file_text, sh.sc,
2739 sh.value += ANOFFSET (objfile->section_offsets,
2740 SECT_OFF_TEXT (objfile));
2741 procaddr = sh.value;
2743 isym = AUX_GET_ISYM (fh->fBigendian,
2744 (debug_info->external_aux
2747 (*swap_sym_in) (cur_bfd,
2748 ((char *) debug_info->external_sym
2749 + ((fh->isymBase + isym - 1)
2750 * external_sym_size)),
2754 CORE_ADDR high = procaddr + sh.value;
2756 /* Kludge for Irix 5.2 zero fh->adr. */
2758 && (pst->textlow == 0 || procaddr < pst->textlow))
2759 pst->textlow = procaddr;
2760 if (high > pst->texthigh)
2761 pst->texthigh = high;
2764 else if (sh.st == stStatic)
2779 namestring = debug_info->ss + fh->issBase + sh.iss;
2780 record_minimal_symbol (namestring, sh.value,
2781 mst_file_data, sh.sc,
2783 sh.value += ANOFFSET (objfile->section_offsets,
2784 SECT_OFF_DATA (objfile));
2788 /* FIXME! Shouldn't this use cases for bss,
2789 then have the default be abs? */
2790 namestring = debug_info->ss + fh->issBase + sh.iss;
2791 record_minimal_symbol (namestring, sh.value,
2792 mst_file_bss, sh.sc,
2794 sh.value += ANOFFSET (objfile->section_offsets,
2795 SECT_OFF_BSS (objfile));
2801 /* Handle stabs continuation. */
2803 char *stabstring = debug_info->ss + fh->issBase + sh.iss;
2804 int len = strlen (stabstring);
2806 while (stabstring[len - 1] == '\\')
2809 char *stabstring1 = stabstring;
2813 /* Ignore continuation char from 1st string. */
2816 /* Read next stabstring. */
2818 (*swap_sym_in) (cur_bfd,
2819 (((char *) debug_info->external_sym)
2820 + (fh->isymBase + cur_sdx)
2821 * external_sym_size),
2823 stabstring2 = debug_info->ss + fh->issBase + sh2.iss;
2824 len2 = strlen (stabstring2);
2826 /* Concatinate stabstring2 with stabstring1. */
2828 && stabstring != debug_info->ss + fh->issBase + sh.iss)
2829 stabstring = xrealloc (stabstring, len + len2 + 1);
2832 stabstring = xmalloc (len + len2 + 1);
2833 strcpy (stabstring, stabstring1);
2835 strcpy (stabstring + len, stabstring2);
2843 /* Standard, external, non-debugger, symbols. */
2845 case N_TEXT | N_EXT:
2846 case N_NBTEXT | N_EXT:
2847 sh.value += ANOFFSET (objfile->section_offsets,
2848 SECT_OFF_TEXT (objfile));
2851 case N_DATA | N_EXT:
2852 case N_NBDATA | N_EXT:
2853 sh.value += ANOFFSET (objfile->section_offsets,
2854 SECT_OFF_DATA (objfile));
2859 case N_NBBSS | N_EXT:
2860 case N_SETV | N_EXT: /* FIXME, is this in BSS? */
2861 sh.value += ANOFFSET (objfile->section_offsets,
2862 SECT_OFF_BSS (objfile));
2869 /* Standard, local, non-debugger, symbols. */
2873 /* We need to be able to deal with both N_FN or
2874 N_TEXT, because we have no way of knowing
2875 whether the sys-supplied ld or GNU ld was used
2876 to make the executable. Sequents throw in
2877 another wrinkle -- they renumbered N_FN. */
2885 sh.value += ANOFFSET (objfile->section_offsets,
2886 SECT_OFF_DATA (objfile));
2889 case N_UNDF | N_EXT:
2890 continue; /* Just undefined, not COMMON. */
2895 /* Lots of symbol types we can just ignore. */
2902 /* Keep going . . . */
2905 * Special symbol types for GNU
2908 case N_INDR | N_EXT:
2910 case N_SETA | N_EXT:
2912 case N_SETT | N_EXT:
2914 case N_SETD | N_EXT:
2916 case N_SETB | N_EXT:
2927 static int prev_so_symnum = -10;
2928 static int first_so_symnum;
2930 int prev_textlow_not_set;
2932 valu = sh.value + ANOFFSET (objfile->section_offsets,
2933 SECT_OFF_TEXT (objfile));
2935 prev_textlow_not_set = textlow_not_set;
2937 /* A zero value is probably an indication for the
2938 SunPRO 3.0 compiler. end_psymtab explicitly tests
2939 for zero, so don't relocate it. */
2942 && gdbarch_sofun_address_maybe_missing (gdbarch))
2944 textlow_not_set = 1;
2948 textlow_not_set = 0;
2950 past_first_source_file = 1;
2952 if (prev_so_symnum != symnum - 1)
2953 { /* Here if prev stab wasn't N_SO. */
2954 first_so_symnum = symnum;
2958 pst = (struct partial_symtab *) 0;
2960 dependencies_used = 0;
2964 prev_so_symnum = symnum;
2966 /* End the current partial symtab and start a
2969 /* SET_NAMESTRING ();*/
2970 namestring = stabstring;
2972 /* Null name means end of .o file. Don't start a new
2974 if (*namestring == '\000')
2977 /* Some compilers (including gcc) emit a pair of
2978 initial N_SOs. The first one is a directory name;
2979 the second the file name. If pst exists, is
2980 empty, and has a filename ending in '/', we assume
2981 the previous N_SO was a directory name. */
2982 p = lbasename (namestring);
2983 if (p != namestring && *p == '\000')
2984 continue; /* Simply ignore directory
2987 /* Some other compilers (C++ ones in particular) emit
2988 useless SOs for non-existant .c files. We ignore
2989 all subsequent SOs that immediately follow the
3002 enum language tmp_language;
3004 /* Mark down an include file in the current psymtab. */
3006 /* SET_NAMESTRING (); */
3007 namestring = stabstring;
3010 = deduce_language_from_filename (namestring);
3012 /* Only change the psymtab's language if we've
3013 learned something useful (eg. tmp_language is not
3014 language_unknown). In addition, to match what
3015 start_subfile does, never change from C++ to
3017 if (tmp_language != language_unknown
3018 && (tmp_language != language_c
3019 || psymtab_language != language_cplus))
3020 psymtab_language = tmp_language;
3022 /* In C++, one may expect the same filename to come
3023 round many times, when code is coming alternately
3024 from the main file and from inline functions in
3025 other files. So I check to see if this is a file
3026 we've seen before -- either the main source file,
3027 or a previously included file.
3029 This seems to be a lot of time to be spending on
3030 N_SOL, but things like "break c-exp.y:435" need to
3031 work (I suppose the psymtab_include_list could be
3032 hashed or put in a binary tree, if profiling shows
3033 this is a major hog). */
3034 if (pst && filename_cmp (namestring, pst->filename) == 0)
3040 for (i = 0; i < includes_used; i++)
3041 if (filename_cmp (namestring,
3042 psymtab_include_list[i]) == 0)
3051 psymtab_include_list[includes_used++] = namestring;
3052 if (includes_used >= includes_allocated)
3054 const char **orig = psymtab_include_list;
3056 psymtab_include_list = (const char **)
3057 alloca ((includes_allocated *= 2) *
3058 sizeof (const char *));
3059 memcpy (psymtab_include_list, orig,
3060 includes_used * sizeof (const char *));
3064 case N_LSYM: /* Typedef or automatic variable. */
3065 case N_STSYM: /* Data seg var -- static */
3066 case N_LCSYM: /* BSS " */
3067 case N_ROSYM: /* Read-only data seg var -- static. */
3068 case N_NBSTS: /* Gould nobase. */
3069 case N_NBLCS: /* symbols. */
3071 case N_GSYM: /* Global (extern) variable; can be
3072 data or bss (sigh FIXME). */
3074 /* Following may probably be ignored; I'll leave them here
3075 for now (until I do Pascal and Modula 2 extensions). */
3077 case N_PC: /* I may or may not need this; I
3079 case N_M2C: /* I suspect that I can ignore this
3081 case N_SCOPE: /* Same. */
3083 /* SET_NAMESTRING (); */
3084 namestring = stabstring;
3085 p = (char *) strchr (namestring, ':');
3087 continue; /* Not a debugging symbol. */
3091 /* Main processing section for debugging symbols which
3092 the initial read through the symbol tables needs to
3093 worry about. If we reach this point, the symbol
3094 which we are considering is definitely one we are
3095 interested in. p must also contain the (valid)
3096 index into the namestring which indicates the
3097 debugging type symbol. */
3102 sh.value += ANOFFSET (objfile->section_offsets,
3103 SECT_OFF_DATA (objfile));
3105 if (gdbarch_static_transform_name_p (gdbarch))
3106 namestring = gdbarch_static_transform_name
3107 (gdbarch, namestring);
3109 add_psymbol_to_list (namestring, p - namestring, 1,
3110 VAR_DOMAIN, LOC_STATIC,
3111 &objfile->static_psymbols,
3113 psymtab_language, objfile);
3116 sh.value += ANOFFSET (objfile->section_offsets,
3117 SECT_OFF_DATA (objfile));
3118 /* The addresses in these entries are reported
3119 to be wrong. See the code that reads 'G's
3121 add_psymbol_to_list (namestring, p - namestring, 1,
3122 VAR_DOMAIN, LOC_STATIC,
3123 &objfile->global_psymbols,
3125 psymtab_language, objfile);
3129 /* When a 'T' entry is defining an anonymous enum, it
3130 may have a name which is the empty string, or a
3131 single space. Since they're not really defining a
3132 symbol, those shouldn't go in the partial symbol
3133 table. We do pick up the elements of such enums at
3134 'check_enum:', below. */
3135 if (p >= namestring + 2
3136 || (p == namestring + 1
3137 && namestring[0] != ' '))
3139 add_psymbol_to_list (namestring, p - namestring, 1,
3140 STRUCT_DOMAIN, LOC_TYPEDEF,
3141 &objfile->static_psymbols,
3143 psymtab_language, objfile);
3146 /* Also a typedef with the same name. */
3147 add_psymbol_to_list (namestring,
3149 VAR_DOMAIN, LOC_TYPEDEF,
3150 &objfile->static_psymbols,
3159 if (p != namestring) /* a name is there, not
3162 add_psymbol_to_list (namestring, p - namestring, 1,
3163 VAR_DOMAIN, LOC_TYPEDEF,
3164 &objfile->static_psymbols,
3166 psymtab_language, objfile);
3169 /* If this is an enumerated type, we need to add
3170 all the enum constants to the partial symbol
3171 table. This does not cover enums without names,
3172 e.g. "enum {a, b} c;" in C, but fortunately
3173 those are rare. There is no way for GDB to find
3174 those from the enum type without spending too
3175 much time on it. Thus to solve this problem,
3176 the compiler needs to put out the enum in a
3177 nameless type. GCC2 does this. */
3179 /* We are looking for something of the form
3180 <name> ":" ("t" | "T") [<number> "="] "e"
3181 {<constant> ":" <value> ","} ";". */
3183 /* Skip over the colon and the 't' or 'T'. */
3185 /* This type may be given a number. Also, numbers
3186 can come in pairs like (0,26). Skip over it. */
3187 while ((*p >= '0' && *p <= '9')
3188 || *p == '(' || *p == ',' || *p == ')'
3194 /* The aix4 compiler emits extra crud before
3198 /* Skip over the type (?). */
3202 /* Skip over the colon. */
3206 /* We have found an enumerated type. */
3207 /* According to comments in read_enum_type
3208 a comma could end it instead of a semicolon.
3209 I don't know where that happens.
3211 while (*p && *p != ';' && *p != ',')
3215 /* Check for and handle cretinous dbx
3216 symbol name continuation! */
3217 if (*p == '\\' || (*p == '?' && p[1] == '\0'))
3218 p = next_symbol_text (objfile);
3220 /* Point to the character after the name
3221 of the enum constant. */
3222 for (q = p; *q && *q != ':'; q++)
3224 /* Note that the value doesn't matter for
3225 enum constants in psymtabs, just in
3227 add_psymbol_to_list (p, q - p, 1,
3228 VAR_DOMAIN, LOC_CONST,
3229 &objfile->static_psymbols,
3230 0, 0, psymtab_language,
3232 /* Point past the name. */
3234 /* Skip over the value. */
3235 while (*p && *p != ',')
3237 /* Advance past the comma. */
3244 /* Constant, e.g. from "const" in Pascal. */
3245 add_psymbol_to_list (namestring, p - namestring, 1,
3246 VAR_DOMAIN, LOC_CONST,
3247 &objfile->static_psymbols,
3248 sh.value, 0, psymtab_language,
3255 int name_len = p - namestring;
3256 char *name = xmalloc (name_len + 1);
3258 memcpy (name, namestring, name_len);
3259 name[name_len] = '\0';
3260 function_outside_compilation_unit_complaint (name);
3263 sh.value += ANOFFSET (objfile->section_offsets,
3264 SECT_OFF_TEXT (objfile));
3265 add_psymbol_to_list (namestring, p - namestring, 1,
3266 VAR_DOMAIN, LOC_BLOCK,
3267 &objfile->static_psymbols,
3269 psymtab_language, objfile);
3272 /* Global functions were ignored here, but now they
3273 are put into the global psymtab like one would
3274 expect. They're also in the minimal symbol
3279 int name_len = p - namestring;
3280 char *name = xmalloc (name_len + 1);
3282 memcpy (name, namestring, name_len);
3283 name[name_len] = '\0';
3284 function_outside_compilation_unit_complaint (name);
3287 sh.value += ANOFFSET (objfile->section_offsets,
3288 SECT_OFF_TEXT (objfile));
3289 add_psymbol_to_list (namestring, p - namestring, 1,
3290 VAR_DOMAIN, LOC_BLOCK,
3291 &objfile->global_psymbols,
3293 psymtab_language, objfile);
3296 /* Two things show up here (hopefully); static
3297 symbols of local scope (static used inside
3298 braces) or extensions of structure symbols. We
3313 case '#': /* For symbol identification (used
3318 /* It is a C++ nested symbol. We don't need to
3319 record it (I don't think); if we try to look up
3320 foo::bar::baz, then symbols for the symtab
3321 containing foo should get read in, I think. */
3322 /* Someone says sun cc puts out symbols like
3323 /foo/baz/maclib::/usr/local/bin/maclib,
3324 which would get here with a symbol type of ':'. */
3328 /* Unexpected symbol descriptor. The second and
3329 subsequent stabs of a continued stab can show up
3330 here. The question is whether they ever can
3331 mimic a normal stab--it would be nice if not,
3332 since we certainly don't want to spend the time
3333 searching to the end of every string looking for
3336 complaint (&symfile_complaints,
3337 _("unknown symbol descriptor `%c'"), p[1]);
3339 /* Ignore it; perhaps it is an extension that we don't
3348 /* Solaris 2 end of module, finish current partial
3349 symbol table. END_PSYMTAB will set
3350 pst->texthigh to the proper value, which is
3351 necessary if a module compiled without
3352 debugging info follows this module. */
3354 && gdbarch_sofun_address_maybe_missing (gdbarch))
3356 pst = (struct partial_symtab *) 0;
3358 dependencies_used = 0;
3363 if (sh.value > save_pst->texthigh)
3364 save_pst->texthigh = sh.value;
3369 case N_SSYM: /* Claim: Structure or union
3370 element. Hopefully, I can
3372 case N_ENTRY: /* Alternate entry point; can
3374 case N_MAIN: /* Can definitely ignore this. */
3375 case N_CATCH: /* These are GNU C++ extensions. */
3376 case N_EHDECL: /* that can safely be ignored here. */
3386 case N_NSYMS: /* Ultrix 4.0: symbol count */
3387 case N_DEFD: /* GNU Modula-2 */
3388 case N_ALIAS: /* SunPro F77: alias name, ignore
3391 case N_OBJ: /* Useless types from Solaris. */
3393 /* These symbols aren't interesting; don't worry about
3399 /* If we haven't found it yet, ignore it. It's
3400 probably some new type we don't know about yet. */
3401 complaint (&symfile_complaints,
3402 _("unknown symbol type %s"),
3403 hex_string (type_code)); /* CUR_SYMBOL_TYPE */
3407 && stabstring != debug_info->ss + fh->issBase + sh.iss)
3410 /* end - Handle continuation */
3415 for (cur_sdx = 0; cur_sdx < fh->csym;)
3418 enum address_class class;
3419 CORE_ADDR minsym_value;
3421 (*swap_sym_in) (cur_bfd,
3422 ((char *) debug_info->external_sym
3423 + ((fh->isymBase + cur_sdx)
3424 * external_sym_size)),
3427 if (ECOFF_IS_STAB (&sh))
3433 /* Non absolute static symbols go into the minimal table. */
3434 if (SC_IS_UNDEF (sh.sc) || sh.sc == scNil
3435 || (sh.index == indexNil
3436 && (sh.st != stStatic || sh.sc == scAbs)))
3438 /* FIXME, premature? */
3443 name = debug_info->ss + fh->issBase + sh.iss;
3445 minsym_value = sh.value;
3451 /* The value of a stEnd symbol is the displacement from the
3452 corresponding start symbol value, do not relocate it. */
3454 sh.value += ANOFFSET (objfile->section_offsets,
3455 SECT_OFF_TEXT (objfile));
3462 sh.value += ANOFFSET (objfile->section_offsets,
3463 SECT_OFF_DATA (objfile));
3467 sh.value += ANOFFSET (objfile->section_offsets,
3468 SECT_OFF_BSS (objfile));
3479 prim_record_minimal_symbol_and_info (name, minsym_value,
3481 SECT_OFF_TEXT (objfile),
3487 /* Ignore all parameter symbol records. */
3488 if (sh.index >= hdr->iauxMax)
3490 /* Should not happen, but does when cross-compiling
3491 with the MIPS compiler. FIXME -- pull later. */
3492 index_complaint (name);
3493 new_sdx = cur_sdx + 1; /* Don't skip at all. */
3496 new_sdx = AUX_GET_ISYM (fh->fBigendian,
3497 (debug_info->external_aux
3501 if (new_sdx <= cur_sdx)
3503 /* This should not happen either... FIXME. */
3504 complaint (&symfile_complaints,
3505 _("bad proc end in aux found from symbol %s"),
3507 new_sdx = cur_sdx + 1; /* Don't skip backward. */
3510 /* For stProc symbol records, we need to check the
3511 storage class as well, as only (stProc, scText)
3512 entries represent "real" procedures - See the
3513 Compaq document titled "Object File / Symbol Table
3514 Format Specification" for more information. If the
3515 storage class is not scText, we discard the whole
3516 block of symbol records for this stProc. */
3517 if (sh.st == stProc && sh.sc != scText)
3520 /* Usually there is a local and a global stProc symbol
3521 for a function. This means that the function name
3522 has already been entered into the mimimal symbol table
3523 while processing the global symbols in pass 2 above.
3524 One notable exception is the PROGRAM name from
3525 f77 compiled executables, it is only put out as
3526 local stProc symbol, and a global MAIN__ stProc symbol
3527 points to it. It doesn't matter though, as gdb is
3528 still able to find the PROGRAM name via the partial
3529 symbol table, and the MAIN__ symbol via the minimal
3531 if (sh.st == stProc)
3532 add_psymbol_to_list (name, strlen (name), 1,
3533 VAR_DOMAIN, LOC_BLOCK,
3534 &objfile->global_psymbols,
3535 0, sh.value, psymtab_language, objfile);
3537 add_psymbol_to_list (name, strlen (name), 1,
3538 VAR_DOMAIN, LOC_BLOCK,
3539 &objfile->static_psymbols,
3540 0, sh.value, psymtab_language, objfile);
3542 procaddr = sh.value;
3545 (*swap_sym_in) (cur_bfd,
3546 ((char *) debug_info->external_sym
3547 + ((fh->isymBase + cur_sdx - 1)
3548 * external_sym_size)),
3553 /* Kludge for Irix 5.2 zero fh->adr. */
3555 && (pst->textlow == 0 || procaddr < pst->textlow))
3556 pst->textlow = procaddr;
3558 high = procaddr + sh.value;
3559 if (high > pst->texthigh)
3560 pst->texthigh = high;
3563 case stStatic: /* Variable */
3564 if (SC_IS_DATA (sh.sc))
3565 prim_record_minimal_symbol_and_info (name, minsym_value,
3567 SECT_OFF_DATA (objfile),
3570 prim_record_minimal_symbol_and_info (name, minsym_value,
3572 SECT_OFF_BSS (objfile),
3577 case stIndirect: /* Irix5 forward declaration */
3578 /* Skip forward declarations from Irix5 cc. */
3581 case stTypedef: /* Typedef */
3582 /* Skip typedefs for forward declarations and opaque
3583 structs from alpha and mips cc. */
3584 if (sh.iss == 0 || has_opaque_xref (fh, &sh))
3586 class = LOC_TYPEDEF;
3589 case stConstant: /* Constant decl */
3596 case stBlock: /* { }, str, un, enum */
3597 /* Do not create a partial symbol for cc unnamed aggregates
3598 and gcc empty aggregates. */
3599 if ((sh.sc == scInfo
3600 || SC_IS_COMMON (sh.sc))
3602 && sh.index != cur_sdx + 2)
3604 add_psymbol_to_list (name, strlen (name), 1,
3605 STRUCT_DOMAIN, LOC_TYPEDEF,
3606 &objfile->static_psymbols,
3608 psymtab_language, objfile);
3610 handle_psymbol_enumerators (objfile, fh, sh.st, sh.value);
3612 /* Skip over the block. */
3614 if (new_sdx <= cur_sdx)
3616 /* This happens with the Ultrix kernel. */
3617 complaint (&symfile_complaints,
3618 _("bad aux index at block symbol %s"), name);
3619 new_sdx = cur_sdx + 1; /* Don't skip backward. */
3624 case stFile: /* File headers */
3625 case stLabel: /* Labels */
3626 case stEnd: /* Ends of files */
3629 case stLocal: /* Local variables */
3630 /* Normally these are skipped because we skip over
3631 all blocks we see. However, these can occur
3632 as visible symbols in a .h file that contains code. */
3636 /* Both complaints are valid: one gives symbol name,
3637 the other the offending symbol type. */
3638 complaint (&symfile_complaints, _("unknown local symbol %s"),
3640 complaint (&symfile_complaints, _("with type %d"), sh.st);
3644 /* Use this gdb symbol. */
3645 add_psymbol_to_list (name, strlen (name), 1,
3647 &objfile->static_psymbols,
3648 0, sh.value, psymtab_language, objfile);
3650 cur_sdx++; /* Go to next file symbol. */
3653 /* Now do enter the external symbols. */
3654 ext_ptr = &extern_tab[fdr_to_pst[f_idx].globals_offset];
3655 cur_sdx = fdr_to_pst[f_idx].n_globals;
3656 PST_PRIVATE (save_pst)->extern_count = cur_sdx;
3657 PST_PRIVATE (save_pst)->extern_tab = ext_ptr;
3658 for (; --cur_sdx >= 0; ext_ptr++)
3660 enum address_class class;
3665 if (ext_ptr->ifd != f_idx)
3666 internal_error (__FILE__, __LINE__,
3667 _("failed internal consistency check"));
3668 psh = &ext_ptr->asym;
3670 /* Do not add undefined symbols to the partial symbol table. */
3671 if (SC_IS_UNDEF (psh->sc) || psh->sc == scNil)
3674 svalue = psh->value;
3679 svalue += ANOFFSET (objfile->section_offsets,
3680 SECT_OFF_TEXT (objfile));
3687 svalue += ANOFFSET (objfile->section_offsets,
3688 SECT_OFF_DATA (objfile));
3692 svalue += ANOFFSET (objfile->section_offsets,
3693 SECT_OFF_BSS (objfile));
3700 /* These are generated for static symbols in .o files,
3705 /* External procedure symbols have been entered
3706 into the minimal symbol table in pass 2 above.
3707 Ignore them, as parse_external will ignore them too. */
3713 unknown_ext_complaint (debug_info->ssext + psh->iss);
3714 /* Fall through, pretend it's global. */
3716 /* Global common symbols are resolved by the runtime loader,
3718 if (SC_IS_COMMON (psh->sc))
3724 name = debug_info->ssext + psh->iss;
3725 add_psymbol_to_list (name, strlen (name), 1,
3727 &objfile->global_psymbols,
3729 psymtab_language, objfile);
3733 /* Link pst to FDR. end_psymtab returns NULL if the psymtab was
3734 empty and put on the free list. */
3735 fdr_to_pst[f_idx].pst = end_psymtab (objfile, save_pst,
3736 psymtab_include_list, includes_used,
3737 -1, save_pst->texthigh,
3738 dependency_list, dependencies_used, textlow_not_set);
3740 dependencies_used = 0;
3742 /* The objfile has its functions reordered if this partial symbol
3743 table overlaps any other partial symbol table.
3744 We cannot assume a reordered objfile if a partial symbol table
3745 is contained within another partial symbol table, as partial symbol
3746 tables for include files with executable code are contained
3747 within the partial symbol table for the including source file,
3748 and we do not want to flag the objfile reordered for these cases.
3750 This strategy works well for Irix-5.2 shared libraries, but we
3751 might have to use a more elaborate (and slower) algorithm for
3753 save_pst = fdr_to_pst[f_idx].pst;
3754 if (save_pst != NULL
3755 && save_pst->textlow != 0
3756 && !(objfile->flags & OBJF_REORDERED))
3758 ALL_OBJFILE_PSYMTABS (objfile, pst)
3761 && save_pst->textlow >= pst->textlow
3762 && save_pst->textlow < pst->texthigh
3763 && save_pst->texthigh > pst->texthigh)
3765 objfile->flags |= OBJF_REORDERED;
3772 /* Now scan the FDRs for dependencies. */
3773 for (f_idx = 0; f_idx < hdr->ifdMax; f_idx++)
3775 fh = f_idx + debug_info->fdr;
3776 pst = fdr_to_pst[f_idx].pst;
3778 if (pst == (struct partial_symtab *) NULL)
3781 /* This should catch stabs-in-ecoff. */
3785 /* Skip the first file indirect entry as it is a self dependency for
3786 source files or a reverse .h -> .c dependency for header files. */
3787 pst->number_of_dependencies = 0;
3789 ((struct partial_symtab **)
3790 obstack_alloc (&objfile->objfile_obstack,
3792 * sizeof (struct partial_symtab *))));
3793 for (s_idx = 1; s_idx < fh->crfd; s_idx++)
3797 (*swap_rfd_in) (cur_bfd,
3798 ((char *) debug_info->external_rfd
3799 + (fh->rfdBase + s_idx) * external_rfd_size),
3801 if (rh < 0 || rh >= hdr->ifdMax)
3803 complaint (&symfile_complaints, _("bad file number %ld"), rh);
3807 /* Skip self dependencies of header files. */
3811 /* Do not add to dependeny list if psymtab was empty. */
3812 if (fdr_to_pst[rh].pst == (struct partial_symtab *) NULL)
3814 pst->dependencies[pst->number_of_dependencies++]
3815 = fdr_to_pst[rh].pst;
3819 /* Remove the dummy psymtab created for -O3 images above, if it is
3820 still empty, to enable the detection of stripped executables. */
3821 if (objfile->psymtabs->next == NULL
3822 && objfile->psymtabs->number_of_dependencies == 0
3823 && objfile->psymtabs->n_global_syms == 0
3824 && objfile->psymtabs->n_static_syms == 0)
3825 objfile->psymtabs = NULL;
3826 do_cleanups (old_chain);
3829 /* If the current psymbol has an enumerated type, we need to add
3830 all the enum constants to the partial symbol table. */
3833 handle_psymbol_enumerators (struct objfile *objfile, FDR *fh, int stype,
3836 const bfd_size_type external_sym_size = debug_swap->external_sym_size;
3837 void (*const swap_sym_in) (bfd *, void *, SYMR *) = debug_swap->swap_sym_in;
3838 char *ext_sym = ((char *) debug_info->external_sym
3839 + ((fh->isymBase + cur_sdx + 1) * external_sym_size));
3849 /* It is an enumerated type if the next symbol entry is a stMember
3850 and its auxiliary index is indexNil or its auxiliary entry
3851 is a plain btNil or btVoid.
3852 Alpha cc -migrate enums are recognized by a zero index and
3853 a zero symbol value.
3854 DU 4.0 cc enums are recognized by a member type of btEnum without
3855 qualifiers and a zero symbol value. */
3856 (*swap_sym_in) (cur_bfd, ext_sym, &sh);
3857 if (sh.st != stMember)
3860 if (sh.index == indexNil
3861 || (sh.index == 0 && svalue == 0))
3863 (*debug_swap->swap_tir_in) (fh->fBigendian,
3864 &(debug_info->external_aux
3865 + fh->iauxBase + sh.index)->a_ti,
3867 if ((tir.bt != btNil
3869 && (tir.bt != btEnum || svalue != 0))
3870 || tir.tq0 != tqNil)
3882 (*swap_sym_in) (cur_bfd, ext_sym, &sh);
3883 if (sh.st != stMember)
3885 name = debug_info->ss + cur_fdr->issBase + sh.iss;
3887 /* Note that the value doesn't matter for enum constants
3888 in psymtabs, just in symtabs. */
3889 add_psymbol_to_list (name, strlen (name), 1,
3890 VAR_DOMAIN, LOC_CONST,
3891 &objfile->static_psymbols, 0,
3892 (CORE_ADDR) 0, psymtab_language, objfile);
3893 ext_sym += external_sym_size;
3897 /* Get the next symbol. OBJFILE is unused. */
3900 mdebug_next_symbol_text (struct objfile *objfile)
3905 (*debug_swap->swap_sym_in) (cur_bfd,
3906 ((char *) debug_info->external_sym
3907 + ((cur_fdr->isymBase + cur_sdx)
3908 * debug_swap->external_sym_size)),
3910 return debug_info->ss + cur_fdr->issBase + sh.iss;
3913 /* Ancillary function to psymtab_to_symtab(). Does all the work
3914 for turning the partial symtab PST into a symtab, recurring
3915 first on all dependent psymtabs. The argument FILENAME is
3916 only passed so we can see in debug stack traces what file
3919 This function has a split personality, based on whether the
3920 symbol table contains ordinary ecoff symbols, or stabs-in-ecoff.
3921 The flow of control and even the memory allocation differs. FIXME. */
3924 psymtab_to_symtab_1 (struct objfile *objfile,
3925 struct partial_symtab *pst, const char *filename)
3927 bfd_size_type external_sym_size;
3928 bfd_size_type external_pdr_size;
3929 void (*swap_sym_in) (bfd *, void *, SYMR *);
3930 void (*swap_pdr_in) (bfd *, void *, PDR *);
3932 struct symtab *st = NULL;
3934 struct linetable *lines;
3935 CORE_ADDR lowest_pdr_addr = 0;
3936 int last_symtab_ended = 0;
3942 /* Read in all partial symbtabs on which this one is dependent.
3943 NOTE that we do have circular dependencies, sigh. We solved
3944 that by setting pst->readin before this point. */
3946 for (i = 0; i < pst->number_of_dependencies; i++)
3947 if (!pst->dependencies[i]->readin)
3949 /* Inform about additional files to be read in. */
3952 fputs_filtered (" ", gdb_stdout);
3954 fputs_filtered ("and ", gdb_stdout);
3956 printf_filtered ("%s...",
3957 pst->dependencies[i]->filename);
3958 wrap_here (""); /* Flush output */
3959 gdb_flush (gdb_stdout);
3961 /* We only pass the filename for debug purposes. */
3962 psymtab_to_symtab_1 (objfile, pst->dependencies[i],
3963 pst->dependencies[i]->filename);
3966 /* Do nothing if this is a dummy psymtab. */
3968 if (pst->n_global_syms == 0 && pst->n_static_syms == 0
3969 && pst->textlow == 0 && pst->texthigh == 0)
3972 /* Now read the symbols for this symtab. */
3974 cur_bfd = CUR_BFD (pst);
3975 debug_swap = DEBUG_SWAP (pst);
3976 debug_info = DEBUG_INFO (pst);
3977 pending_list = PENDING_LIST (pst);
3978 external_sym_size = debug_swap->external_sym_size;
3979 external_pdr_size = debug_swap->external_pdr_size;
3980 swap_sym_in = debug_swap->swap_sym_in;
3981 swap_pdr_in = debug_swap->swap_pdr_in;
3982 mdebugread_objfile = objfile;
3983 cur_fd = FDR_IDX (pst);
3984 fh = ((cur_fd == -1)
3986 : debug_info->fdr + cur_fd);
3989 /* See comment in parse_partial_symbols about the @stabs sentinel. */
3990 processing_gcc_compilation = 0;
3991 if (fh != (FDR *) NULL && fh->csym >= 2)
3995 (*swap_sym_in) (cur_bfd,
3996 ((char *) debug_info->external_sym
3997 + (fh->isymBase + 1) * external_sym_size),
3999 if (strcmp (debug_info->ss + fh->issBase + sh.iss,
4002 /* We indicate that this is a GCC compilation so that certain
4003 features will be enabled in stabsread/dbxread. */
4004 processing_gcc_compilation = 2;
4008 if (processing_gcc_compilation != 0)
4010 struct gdbarch *gdbarch = get_objfile_arch (objfile);
4012 /* This symbol table contains stabs-in-ecoff entries. */
4014 /* Parse local symbols first. */
4016 if (fh->csym <= 2) /* FIXME, this blows psymtab->symtab ptr. */
4018 mdebugread_objfile = NULL;
4021 for (cur_sdx = 2; cur_sdx < fh->csym; cur_sdx++)
4027 (*swap_sym_in) (cur_bfd,
4028 (((char *) debug_info->external_sym)
4029 + (fh->isymBase + cur_sdx) * external_sym_size),
4031 name = debug_info->ss + fh->issBase + sh.iss;
4033 /* XXX This is a hack. It will go away! */
4034 if (ECOFF_IS_STAB (&sh) || (name[0] == '#'))
4036 int type_code = ECOFF_UNMARK_STAB (sh.index);
4038 /* We should never get non N_STAB symbols here, but they
4039 should be harmless, so keep process_one_symbol from
4040 complaining about them. */
4041 if (type_code & N_STAB)
4043 /* If we found a trailing N_SO with no name, process
4044 it here instead of in process_one_symbol, so we
4045 can keep a handle to its symtab. The symtab
4046 would otherwise be ended twice, once in
4047 process_one_symbol, and once after this loop. */
4048 if (type_code == N_SO
4049 && get_last_source_file ()
4050 && previous_stab_code != (unsigned char) N_SO
4053 valu += ANOFFSET (pst->section_offsets,
4054 SECT_OFF_TEXT (objfile));
4055 previous_stab_code = N_SO;
4056 st = end_symtab (valu, objfile,
4057 SECT_OFF_TEXT (objfile));
4059 last_symtab_ended = 1;
4063 last_symtab_ended = 0;
4064 process_one_symbol (type_code, 0, valu, name,
4065 pst->section_offsets, objfile);
4068 /* Similarly a hack. */
4069 else if (name[0] == '#')
4071 process_one_symbol (N_SLINE, 0, valu, name,
4072 pst->section_offsets, objfile);
4074 if (type_code == N_FUN)
4076 /* Make up special symbol to contain
4077 procedure specific info. */
4078 struct mdebug_extra_func_info *e =
4079 ((struct mdebug_extra_func_info *)
4080 obstack_alloc (&mdebugread_objfile->objfile_obstack,
4081 sizeof (struct mdebug_extra_func_info)));
4082 struct symbol *s = new_symbol (MDEBUG_EFI_SYMBOL_NAME);
4084 memset (e, 0, sizeof (struct mdebug_extra_func_info));
4085 SYMBOL_DOMAIN (s) = LABEL_DOMAIN;
4086 SYMBOL_ACLASS_INDEX (s) = LOC_CONST;
4087 SYMBOL_TYPE (s) = objfile_type (objfile)->builtin_void;
4088 SYMBOL_VALUE_BYTES (s) = (gdb_byte *) e;
4089 e->pdr.framereg = -1;
4090 add_symbol_to_list (s, &local_symbols);
4093 else if (sh.st == stLabel)
4095 if (sh.index == indexNil)
4097 /* This is what the gcc2_compiled and __gnu_compiled_*
4098 show up as. So don't complain. */
4103 /* Handle encoded stab line number. */
4104 valu += ANOFFSET (pst->section_offsets,
4105 SECT_OFF_TEXT (objfile));
4106 record_line (current_subfile, sh.index,
4107 gdbarch_addr_bits_remove (gdbarch, valu));
4110 else if (sh.st == stProc || sh.st == stStaticProc
4111 || sh.st == stStatic || sh.st == stEnd)
4112 /* These are generated by gcc-2.x, do not complain. */
4115 complaint (&symfile_complaints,
4116 _("unknown stabs symbol %s"), name);
4119 if (! last_symtab_ended)
4121 st = end_symtab (pst->texthigh, objfile,
4122 SECT_OFF_TEXT (objfile));
4126 /* There used to be a call to sort_blocks here, but this should not
4127 be necessary for stabs symtabs. And as sort_blocks modifies the
4128 start address of the GLOBAL_BLOCK to the FIRST_LOCAL_BLOCK,
4129 it did the wrong thing if the first procedure in a file was
4130 generated via asm statements. */
4132 /* Fill in procedure info next. */
4136 struct cleanup *old_chain;
4142 pr_block = (PDR *) xmalloc (fh->cpd * sizeof (PDR));
4143 old_chain = make_cleanup (xfree, pr_block);
4145 pdr_ptr = ((char *) debug_info->external_pdr
4146 + fh->ipdFirst * external_pdr_size);
4147 pdr_end = pdr_ptr + fh->cpd * external_pdr_size;
4151 pdr_ptr += external_pdr_size, pdr_in++)
4153 (*swap_pdr_in) (cur_bfd, pdr_ptr, pdr_in);
4155 /* Determine lowest PDR address, the PDRs are not always
4157 if (pdr_in == pr_block)
4158 lowest_pdr_addr = pdr_in->adr;
4159 else if (pdr_in->adr < lowest_pdr_addr)
4160 lowest_pdr_addr = pdr_in->adr;
4164 pdr_in_end = pdr_in + fh->cpd;
4165 for (; pdr_in < pdr_in_end; pdr_in++)
4166 parse_procedure (pdr_in, st, pst);
4168 do_cleanups (old_chain);
4173 /* This symbol table contains ordinary ecoff entries. */
4181 st = new_symtab ("unknown", 0, objfile);
4185 maxlines = 2 * fh->cline;
4186 st = new_symtab (pst->filename, maxlines, objfile);
4188 /* The proper language was already determined when building
4189 the psymtab, use it. */
4190 st->language = PST_PRIVATE (pst)->pst_language;
4193 psymtab_language = st->language;
4195 lines = LINETABLE (st);
4197 /* Get a new lexical context. */
4199 push_parse_stack ();
4200 top_stack->cur_st = st;
4201 top_stack->cur_block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (st),
4203 BLOCK_START (top_stack->cur_block) = pst->textlow;
4204 BLOCK_END (top_stack->cur_block) = 0;
4205 top_stack->blocktype = stFile;
4206 top_stack->cur_type = 0;
4207 top_stack->procadr = 0;
4208 top_stack->numargs = 0;
4209 found_ecoff_debugging_info = 0;
4216 /* Parse local symbols first. */
4217 sym_ptr = ((char *) debug_info->external_sym
4218 + fh->isymBase * external_sym_size);
4219 sym_end = sym_ptr + fh->csym * external_sym_size;
4220 while (sym_ptr < sym_end)
4225 (*swap_sym_in) (cur_bfd, sym_ptr, &sh);
4226 c = parse_symbol (&sh,
4227 debug_info->external_aux + fh->iauxBase,
4228 sym_ptr, fh->fBigendian,
4229 pst->section_offsets, objfile);
4230 sym_ptr += c * external_sym_size;
4233 /* Linenumbers. At the end, check if we can save memory.
4234 parse_lines has to look ahead an arbitrary number of PDR
4235 structures, so we swap them all first. */
4239 struct cleanup *old_chain;
4245 pr_block = (PDR *) xmalloc (fh->cpd * sizeof (PDR));
4247 old_chain = make_cleanup (xfree, pr_block);
4249 pdr_ptr = ((char *) debug_info->external_pdr
4250 + fh->ipdFirst * external_pdr_size);
4251 pdr_end = pdr_ptr + fh->cpd * external_pdr_size;
4255 pdr_ptr += external_pdr_size, pdr_in++)
4257 (*swap_pdr_in) (cur_bfd, pdr_ptr, pdr_in);
4259 /* Determine lowest PDR address, the PDRs are not always
4261 if (pdr_in == pr_block)
4262 lowest_pdr_addr = pdr_in->adr;
4263 else if (pdr_in->adr < lowest_pdr_addr)
4264 lowest_pdr_addr = pdr_in->adr;
4267 parse_lines (fh, pr_block, lines, maxlines,
4268 pst, lowest_pdr_addr);
4269 if (lines->nitems < fh->cline)
4270 lines = shrink_linetable (lines);
4272 /* Fill in procedure info next. */
4274 pdr_in_end = pdr_in + fh->cpd;
4275 for (; pdr_in < pdr_in_end; pdr_in++)
4276 parse_procedure (pdr_in, 0, pst);
4278 do_cleanups (old_chain);
4282 size = lines->nitems;
4285 LINETABLE (st) = obstack_copy (&mdebugread_objfile->objfile_obstack,
4287 (sizeof (struct linetable)
4288 + size * sizeof (lines->item)));
4291 /* .. and our share of externals.
4292 XXX use the global list to speed up things here. How?
4293 FIXME, Maybe quit once we have found the right number of ext's? */
4294 top_stack->cur_st = st;
4295 top_stack->cur_block
4296 = BLOCKVECTOR_BLOCK (BLOCKVECTOR (top_stack->cur_st),
4298 top_stack->blocktype = stFile;
4300 ext_ptr = PST_PRIVATE (pst)->extern_tab;
4301 for (i = PST_PRIVATE (pst)->extern_count; --i >= 0; ext_ptr++)
4302 parse_external (ext_ptr, fh->fBigendian,
4303 pst->section_offsets, objfile);
4305 /* If there are undefined symbols, tell the user.
4306 The alpha has an undefined symbol for every symbol that is
4307 from a shared library, so tell the user only if verbose is on. */
4308 if (info_verbose && n_undef_symbols)
4310 printf_filtered (_("File %s contains %d unresolved references:"),
4311 symtab_to_filename_for_display (st),
4313 printf_filtered ("\n\t%4d variables\n\t%4d "
4314 "procedures\n\t%4d labels\n",
4315 n_undef_vars, n_undef_procs, n_undef_labels);
4316 n_undef_symbols = n_undef_labels = n_undef_vars = n_undef_procs = 0;
4321 set_symtab_primary (st, 1);
4326 /* Now link the psymtab and the symtab. */
4329 mdebugread_objfile = NULL;
4332 /* Ancillary parsing procedures. */
4334 /* Return 1 if the symbol pointed to by SH has a cross reference
4335 to an opaque aggregate type, else 0. */
4338 has_opaque_xref (FDR *fh, SYMR *sh)
4345 if (sh->index == indexNil)
4348 ax = debug_info->external_aux + fh->iauxBase + sh->index;
4349 (*debug_swap->swap_tir_in) (fh->fBigendian, &ax->a_ti, &tir);
4350 if (tir.bt != btStruct && tir.bt != btUnion && tir.bt != btEnum)
4354 (*debug_swap->swap_rndx_in) (fh->fBigendian, &ax->a_rndx, rn);
4355 if (rn->rfd == 0xfff)
4356 rf = AUX_GET_ISYM (fh->fBigendian, ax + 1);
4364 /* Lookup the type at relative index RN. Return it in TPP
4365 if found and in any event come up with its name PNAME.
4366 BIGEND says whether aux symbols are big-endian or not (from fh->fBigendian).
4367 Return value says how many aux symbols we ate. */
4370 cross_ref (int fd, union aux_ext *ax, struct type **tpp,
4371 enum type_code type_code,
4372 /* Use to alloc new type if none is found. */
4373 char **pname, int bigend, char *sym_name)
4382 struct mdebug_pending *pend;
4384 *tpp = (struct type *) NULL;
4386 (*debug_swap->swap_rndx_in) (bigend, &ax->a_rndx, rn);
4388 /* Escape index means 'the next one'. */
4389 if (rn->rfd == 0xfff)
4392 rf = AUX_GET_ISYM (bigend, ax + 1);
4399 /* mips cc uses a rf of -1 for opaque struct definitions.
4400 Set TYPE_FLAG_STUB for these types so that check_typedef will
4401 resolve them if the struct gets defined in another compilation unit. */
4404 *pname = "<undefined>";
4405 *tpp = init_type (type_code, 0, TYPE_FLAG_STUB,
4406 (char *) NULL, mdebugread_objfile);
4410 /* mips cc uses an escaped rn->index of 0 for struct return types
4411 of procedures that were compiled without -g. These will always remain
4413 if (rn->rfd == 0xfff && rn->index == 0)
4415 *pname = "<undefined>";
4419 /* Find the relative file descriptor and the symbol in it. */
4420 fh = get_rfd (fd, rf);
4421 xref_fd = fh - debug_info->fdr;
4423 if (rn->index >= fh->csym)
4425 /* File indirect entry is corrupt. */
4426 *pname = "<illegal>";
4427 bad_rfd_entry_complaint (sym_name, xref_fd, rn->index);
4431 /* If we have processed this symbol then we left a forwarding
4432 pointer to the type in the pending list. If not, we`ll put
4433 it in a list of pending types, to be processed later when
4434 the file will be. In any event, we collect the name for the
4437 esh = ((char *) debug_info->external_sym
4438 + ((fh->isymBase + rn->index)
4439 * debug_swap->external_sym_size));
4440 (*debug_swap->swap_sym_in) (cur_bfd, esh, &sh);
4442 /* Make sure that this type of cross reference can be handled. */
4443 if ((sh.sc != scInfo
4444 || (sh.st != stBlock && sh.st != stTypedef && sh.st != stIndirect
4445 && sh.st != stStruct && sh.st != stUnion
4446 && sh.st != stEnum))
4447 && (sh.st != stBlock || !SC_IS_COMMON (sh.sc)))
4449 /* File indirect entry is corrupt. */
4450 *pname = "<illegal>";
4451 bad_rfd_entry_complaint (sym_name, xref_fd, rn->index);
4455 *pname = debug_info->ss + fh->issBase + sh.iss;
4457 pend = is_pending_symbol (fh, esh);
4462 /* We have not yet seen this type. */
4464 if ((sh.iss == 0 && sh.st == stTypedef) || sh.st == stIndirect)
4468 /* alpha cc puts out a stTypedef with a sh.iss of zero for
4470 a) forward declarations of structs/unions/enums which are not
4471 defined in this compilation unit.
4472 For these the type will be void. This is a bad design decision
4473 as cross referencing across compilation units is impossible
4474 due to the missing name.
4475 b) forward declarations of structs/unions/enums/typedefs which
4476 are defined later in this file or in another file in the same
4477 compilation unit. Irix5 cc uses a stIndirect symbol for this.
4478 Simply cross reference those again to get the true type.
4479 The forward references are not entered in the pending list and
4480 in the symbol table. */
4482 (*debug_swap->swap_tir_in) (bigend,
4483 &(debug_info->external_aux
4484 + fh->iauxBase + sh.index)->a_ti,
4486 if (tir.tq0 != tqNil)
4487 complaint (&symfile_complaints,
4488 _("illegal tq0 in forward typedef for %s"), sym_name);
4492 *tpp = init_type (type_code, 0, 0, (char *) NULL,
4493 mdebugread_objfile);
4494 *pname = "<undefined>";
4501 (debug_info->external_aux
4502 + fh->iauxBase + sh.index + 1),
4503 tpp, type_code, pname,
4504 fh->fBigendian, sym_name);
4508 /* Follow a forward typedef. This might recursively
4509 call cross_ref till we get a non typedef'ed type.
4510 FIXME: This is not correct behaviour, but gdb currently
4511 cannot handle typedefs without type copying. Type
4512 copying is impossible as we might have mutual forward
4513 references between two files and the copied type would not
4514 get filled in when we later parse its definition. */
4515 *tpp = parse_type (xref_fd,
4516 debug_info->external_aux + fh->iauxBase,
4520 debug_info->ss + fh->issBase + sh.iss);
4521 add_pending (fh, esh, *tpp);
4525 complaint (&symfile_complaints,
4526 _("illegal bt %d in forward typedef for %s"), tir.bt,
4528 *tpp = init_type (type_code, 0, 0, (char *) NULL,
4529 mdebugread_objfile);
4534 else if (sh.st == stTypedef)
4536 /* Parse the type for a normal typedef. This might recursively call
4537 cross_ref till we get a non typedef'ed type.
4538 FIXME: This is not correct behaviour, but gdb currently
4539 cannot handle typedefs without type copying. But type copying is
4540 impossible as we might have mutual forward references between
4541 two files and the copied type would not get filled in when
4542 we later parse its definition. */
4543 *tpp = parse_type (xref_fd,
4544 debug_info->external_aux + fh->iauxBase,
4548 debug_info->ss + fh->issBase + sh.iss);
4552 /* Cross reference to a struct/union/enum which is defined
4553 in another file in the same compilation unit but that file
4554 has not been parsed yet.
4555 Initialize the type only, it will be filled in when
4556 it's definition is parsed. */
4557 *tpp = init_type (type_code, 0, 0, (char *) NULL, mdebugread_objfile);
4559 add_pending (fh, esh, *tpp);
4562 /* We used one auxent normally, two if we got a "next one" rf. */
4567 /* Quick&dirty lookup procedure, to avoid the MI ones that require
4568 keeping the symtab sorted. */
4570 static struct symbol *
4571 mylookup_symbol (char *name, const struct block *block,
4572 domain_enum domain, enum address_class class)
4574 struct block_iterator iter;
4579 ALL_BLOCK_SYMBOLS (block, iter, sym)
4581 if (SYMBOL_LINKAGE_NAME (sym)[0] == inc
4582 && SYMBOL_DOMAIN (sym) == domain
4583 && SYMBOL_CLASS (sym) == class
4584 && strcmp (SYMBOL_LINKAGE_NAME (sym), name) == 0)
4588 block = BLOCK_SUPERBLOCK (block);
4590 return mylookup_symbol (name, block, domain, class);
4595 /* Add a new symbol S to a block B. */
4598 add_symbol (struct symbol *s, struct symtab *symtab, struct block *b)
4600 SYMBOL_SYMTAB (s) = symtab;
4601 dict_add_symbol (BLOCK_DICT (b), s);
4604 /* Add a new block B to a symtab S. */
4607 add_block (struct block *b, struct symtab *s)
4609 /* Cast away "const", but that's ok because we're building the
4610 symtab and blockvector here. */
4611 struct blockvector *bv = (struct blockvector *) BLOCKVECTOR (s);
4613 bv = (struct blockvector *) xrealloc ((void *) bv,
4614 (sizeof (struct blockvector)
4615 + BLOCKVECTOR_NBLOCKS (bv)
4616 * sizeof (bv->block)));
4617 if (bv != BLOCKVECTOR (s))
4618 BLOCKVECTOR (s) = bv;
4620 BLOCKVECTOR_BLOCK (bv, BLOCKVECTOR_NBLOCKS (bv)++) = b;
4623 /* Add a new linenumber entry (LINENO,ADR) to a linevector LT.
4624 MIPS' linenumber encoding might need more than one byte
4625 to describe it, LAST is used to detect these continuation lines.
4627 Combining lines with the same line number seems like a bad idea.
4628 E.g: There could be a line number entry with the same line number after the
4629 prologue and GDB should not ignore it (this is a better way to find
4630 a prologue than mips_skip_prologue).
4631 But due to the compressed line table format there are line number entries
4632 for the same line which are needed to bridge the gap to the next
4633 line number entry. These entries have a bogus address info with them
4634 and we are unable to tell them from intended duplicate line number
4636 This is another reason why -ggdb debugging format is preferable. */
4639 add_line (struct linetable *lt, int lineno, CORE_ADDR adr, int last)
4641 /* DEC c89 sometimes produces zero linenos which confuse gdb.
4642 Change them to something sensible. */
4646 last = -2; /* Make sure we record first line. */
4648 if (last == lineno) /* Skip continuation lines. */
4651 lt->item[lt->nitems].line = lineno;
4652 lt->item[lt->nitems++].pc = adr << 2;
4656 /* Sorting and reordering procedures. */
4658 /* Blocks with a smaller low bound should come first. */
4661 compare_blocks (const void *arg1, const void *arg2)
4664 struct block **b1 = (struct block **) arg1;
4665 struct block **b2 = (struct block **) arg2;
4667 addr_diff = (BLOCK_START ((*b1))) - (BLOCK_START ((*b2)));
4669 return (BLOCK_END ((*b2))) - (BLOCK_END ((*b1)));
4673 /* Sort the blocks of a symtab S.
4674 Reorder the blocks in the blockvector by code-address,
4675 as required by some MI search routines. */
4678 sort_blocks (struct symtab *s)
4680 /* We have to cast away const here, but this is ok because we're
4681 constructing the blockvector in this code. */
4682 struct blockvector *bv = (struct blockvector *) BLOCKVECTOR (s);
4684 if (BLOCKVECTOR_NBLOCKS (bv) <= FIRST_LOCAL_BLOCK)
4687 if (BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) == 0)
4688 BLOCK_START (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) = 0;
4689 if (BLOCK_END (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) == 0)
4690 BLOCK_START (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) = 0;
4694 * This is very unfortunate: normally all functions are compiled in
4695 * the order they are found, but if the file is compiled -O3 things
4696 * are very different. It would be nice to find a reliable test
4697 * to detect -O3 images in advance.
4699 if (BLOCKVECTOR_NBLOCKS (bv) > FIRST_LOCAL_BLOCK + 1)
4700 qsort (&BLOCKVECTOR_BLOCK (bv, FIRST_LOCAL_BLOCK),
4701 BLOCKVECTOR_NBLOCKS (bv) - FIRST_LOCAL_BLOCK,
4702 sizeof (struct block *),
4707 int i, j = BLOCKVECTOR_NBLOCKS (bv);
4709 for (i = FIRST_LOCAL_BLOCK; i < j; i++)
4710 if (high < BLOCK_END (BLOCKVECTOR_BLOCK (bv, i)))
4711 high = BLOCK_END (BLOCKVECTOR_BLOCK (bv, i));
4712 BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) = high;
4715 BLOCK_START (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) =
4716 BLOCK_START (BLOCKVECTOR_BLOCK (bv, FIRST_LOCAL_BLOCK));
4718 BLOCK_START (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) =
4719 BLOCK_START (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
4720 BLOCK_END (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) =
4721 BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
4725 /* Constructor/restructor/destructor procedures. */
4727 /* Allocate a new symtab for NAME. Needs an estimate of how many
4728 linenumbers MAXLINES we'll put in it. */
4730 static struct symtab *
4731 new_symtab (const char *name, int maxlines, struct objfile *objfile)
4733 struct symtab *s = allocate_symtab (name, objfile);
4734 struct blockvector *bv;
4736 LINETABLE (s) = new_linetable (maxlines);
4738 /* All symtabs must have at least two blocks. */
4740 BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK) = new_block (NON_FUNCTION_BLOCK);
4741 BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK) = new_block (NON_FUNCTION_BLOCK);
4742 BLOCK_SUPERBLOCK (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) =
4743 BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
4744 BLOCKVECTOR (s) = bv;
4746 s->debugformat = "ECOFF";
4750 /* Allocate a new partial_symtab NAME. */
4752 static struct partial_symtab *
4753 new_psymtab (char *name, struct objfile *objfile)
4755 struct partial_symtab *psymtab;
4757 psymtab = allocate_psymtab (name, objfile);
4758 psymtab->section_offsets = objfile->section_offsets;
4760 /* Keep a backpointer to the file's symbols. */
4762 psymtab->read_symtab_private = obstack_alloc (&objfile->objfile_obstack,
4763 sizeof (struct symloc));
4764 memset (psymtab->read_symtab_private, 0, sizeof (struct symloc));
4765 CUR_BFD (psymtab) = cur_bfd;
4766 DEBUG_SWAP (psymtab) = debug_swap;
4767 DEBUG_INFO (psymtab) = debug_info;
4768 PENDING_LIST (psymtab) = pending_list;
4770 /* The way to turn this into a symtab is to call... */
4771 psymtab->read_symtab = mdebug_read_symtab;
4776 /* Allocate a linetable array of the given SIZE. Since the struct
4777 already includes one item, we subtract one when calculating the
4778 proper size to allocate. */
4780 static struct linetable *
4781 new_linetable (int size)
4783 struct linetable *l;
4787 size = size * sizeof (l->item) + sizeof (struct linetable);
4788 l = (struct linetable *) xmalloc (size);
4793 /* Oops, too big. Shrink it. This was important with the 2.4 linetables,
4794 I am not so sure about the 3.4 ones.
4796 Since the struct linetable already includes one item, we subtract one when
4797 calculating the proper size to allocate. */
4799 static struct linetable *
4800 shrink_linetable (struct linetable *lt)
4802 return (struct linetable *) xrealloc ((void *) lt,
4803 (sizeof (struct linetable)
4805 * sizeof (lt->item))));
4808 /* Allocate and zero a new blockvector of NBLOCKS blocks. */
4810 static struct blockvector *
4811 new_bvect (int nblocks)
4813 struct blockvector *bv;
4816 size = sizeof (struct blockvector) + nblocks * sizeof (struct block *);
4817 bv = (struct blockvector *) xzalloc (size);
4819 BLOCKVECTOR_NBLOCKS (bv) = nblocks;
4824 /* Allocate and zero a new block, and set its BLOCK_DICT. If function
4825 is non-zero, assume the block is associated to a function, and make
4826 sure that the symbols are stored linearly; otherwise, store them
4829 static struct block *
4830 new_block (enum block_type type)
4832 /* FIXME: carlton/2003-09-11: This should use allocate_block to
4833 allocate the block. Which, in turn, suggests that the block
4834 should be allocated on an obstack. */
4835 struct block *retval = xzalloc (sizeof (struct block));
4837 if (type == FUNCTION_BLOCK)
4838 BLOCK_DICT (retval) = dict_create_linear_expandable ();
4840 BLOCK_DICT (retval) = dict_create_hashed_expandable ();
4845 /* Create a new symbol with printname NAME. */
4847 static struct symbol *
4848 new_symbol (char *name)
4850 struct symbol *s = allocate_symbol (mdebugread_objfile);
4852 SYMBOL_SET_LANGUAGE (s, psymtab_language,
4853 &mdebugread_objfile->objfile_obstack);
4854 SYMBOL_SET_NAMES (s, name, strlen (name), 1, mdebugread_objfile);
4858 /* Create a new type with printname NAME. */
4860 static struct type *
4861 new_type (char *name)
4865 t = alloc_type (mdebugread_objfile);
4866 TYPE_NAME (t) = name;
4867 INIT_CPLUS_SPECIFIC (t);
4871 /* Read ECOFF debugging information from a BFD section. This is
4872 called from elfread.c. It parses the section into a
4873 ecoff_debug_info struct, and then lets the rest of the file handle
4877 elfmdebug_build_psymtabs (struct objfile *objfile,
4878 const struct ecoff_debug_swap *swap, asection *sec)
4880 bfd *abfd = objfile->obfd;
4881 struct ecoff_debug_info *info;
4882 struct cleanup *back_to;
4884 /* FIXME: It's not clear whether we should be getting minimal symbol
4885 information from .mdebug in an ELF file, or whether we will.
4886 Re-initialize the minimal symbol reader in case we do. */
4888 init_minimal_symbol_collection ();
4889 back_to = make_cleanup_discard_minimal_symbols ();
4891 info = ((struct ecoff_debug_info *)
4892 obstack_alloc (&objfile->objfile_obstack,
4893 sizeof (struct ecoff_debug_info)));
4895 if (!(*swap->read_debug_info) (abfd, sec, info))
4896 error (_("Error reading ECOFF debugging information: %s"),
4897 bfd_errmsg (bfd_get_error ()));
4899 mdebug_build_psymtabs (objfile, swap, info);
4901 install_minimal_symbols (objfile);
4902 do_cleanups (back_to);
4906 _initialize_mdebugread (void)
4908 basic_type_data = register_objfile_data ();
4910 mdebug_register_index
4911 = register_symbol_register_impl (LOC_REGISTER, &mdebug_register_funcs);
4912 mdebug_regparm_index
4913 = register_symbol_register_impl (LOC_REGPARM_ADDR, &mdebug_register_funcs);