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 compunit_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 (SYMTAB_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
758 = SYMTAB_BLOCKVECTOR (top_stack->cur_st);
760 /* The next test should normally be true, but provides a
761 hook for nested functions (which we don't want to make
763 if (b == BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK))
764 b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
765 /* Irix 5 sometimes has duplicate names for the same
766 function. We want to add such names up at the global
767 level, not as a nested function. */
768 else if (sh->value == top_stack->procadr)
769 b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
771 add_symbol (s, top_stack->cur_st, b);
773 /* Make a type for the procedure itself. */
774 SYMBOL_TYPE (s) = lookup_function_type (t);
776 /* All functions in C++ have prototypes. For C we don't have enough
777 information in the debug info. */
778 if (SYMBOL_LANGUAGE (s) == language_cplus)
779 TYPE_PROTOTYPED (SYMBOL_TYPE (s)) = 1;
781 /* Create and enter a new lexical context. */
782 b = new_block (FUNCTION_BLOCK);
783 SYMBOL_BLOCK_VALUE (s) = b;
784 BLOCK_FUNCTION (b) = s;
785 BLOCK_START (b) = BLOCK_END (b) = sh->value;
786 BLOCK_SUPERBLOCK (b) = top_stack->cur_block;
787 add_block (b, top_stack->cur_st);
789 /* Not if we only have partial info. */
790 if (SC_IS_UNDEF (sh->sc) || sh->sc == scNil)
794 top_stack->cur_block = b;
795 top_stack->blocktype = sh->st;
796 top_stack->cur_type = SYMBOL_TYPE (s);
797 top_stack->cur_field = -1;
798 top_stack->procadr = sh->value;
799 top_stack->numargs = 0;
802 /* Beginning of code for structure, union, and enum definitions.
803 They all share a common set of local variables, defined here. */
805 enum type_code type_code;
811 case stStruct: /* Start a block defining a struct type. */
812 type_code = TYPE_CODE_STRUCT;
813 goto structured_common;
815 case stUnion: /* Start a block defining a union type. */
816 type_code = TYPE_CODE_UNION;
817 goto structured_common;
819 case stEnum: /* Start a block defining an enum type. */
820 type_code = TYPE_CODE_ENUM;
821 goto structured_common;
823 case stBlock: /* Either a lexical block, or some type. */
824 if (sh->sc != scInfo && !SC_IS_COMMON (sh->sc))
825 goto case_stBlock_code; /* Lexical block */
827 type_code = TYPE_CODE_UNDEF; /* We have a type. */
829 /* Common code for handling struct, union, enum, and/or as-yet-
830 unknown-type blocks of info about structured data. `type_code'
831 has been set to the proper TYPE_CODE, if we know it. */
833 found_ecoff_debugging_info = 1;
835 top_stack->blocktype = stBlock;
837 /* First count the number of fields and the highest value. */
840 for (ext_tsym = ext_sh + external_sym_size;
842 ext_tsym += external_sym_size)
846 (*swap_sym_in) (cur_bfd, ext_tsym, &tsym);
851 /* C++ encodes class types as structures where there the
852 methods are encoded as stProc. The scope of stProc
853 symbols also ends with stEnd, thus creating a risk of
854 taking the wrong stEnd symbol record as the end of
855 the current struct, which would cause GDB to undercount
856 the real number of fields in this struct. To make sure
857 we really reached the right stEnd symbol record, we
858 check the associated name, and match it against the
859 struct name. Since method names are mangled while
860 the class name is not, there is no risk of having a
861 method whose name is identical to the class name
862 (in particular constructor method names are different
863 from the class name). There is therefore no risk that
864 this check stops the count on the StEnd of a method.
866 Also, assume that we're really at the end when tsym.iss
868 if (tsym.iss == issNull
869 || strcmp (debug_info->ss + cur_fdr->issBase + tsym.iss,
875 if (nfields == 0 && type_code == TYPE_CODE_UNDEF)
877 /* If the type of the member is Nil (or Void),
878 without qualifiers, assume the tag is an
880 Alpha cc -migrate enums are recognized by a zero
881 index and a zero symbol value.
882 DU 4.0 cc enums are recognized by a member type of
883 btEnum without qualifiers and a zero symbol value. */
884 if (tsym.index == indexNil
885 || (tsym.index == 0 && sh->value == 0))
886 type_code = TYPE_CODE_ENUM;
889 (*debug_swap->swap_tir_in) (bigend,
890 &ax[tsym.index].a_ti,
892 if ((tir.bt == btNil || tir.bt == btVoid
893 || (tir.bt == btEnum && sh->value == 0))
895 type_code = TYPE_CODE_ENUM;
899 if (tsym.value > max_value)
900 max_value = tsym.value;
909 /* This is a no-op; is it trying to tell us something
910 we should be checking? */
911 if (tsym.sc == scVariant); /*UNIMPLEMENTED */
915 /* This is something like a struct within a
916 struct. Skip over the fields of the inner
917 struct. The -1 is because the for loop will
918 increment ext_tsym. */
919 ext_tsym = ((char *) debug_info->external_sym
920 + ((cur_fdr->isymBase + tsym.index - 1)
921 * external_sym_size));
927 /* mips cc puts out a typedef for struct x if it is not yet
928 defined when it encounters
929 struct y { struct x *xp; };
934 /* Irix5 cc puts out a stIndirect for struct x if it is not
935 yet defined when it encounters
936 struct y { struct x *xp; };
941 complaint (&symfile_complaints,
942 _("declaration block contains "
943 "unhandled symbol type %d"),
949 /* In an stBlock, there is no way to distinguish structs,
950 unions, and enums at this point. This is a bug in the
951 original design (that has been fixed with the recent
952 addition of the stStruct, stUnion, and stEnum symbol
953 types.) The way you can tell is if/when you see a variable
954 or field of that type. In that case the variable's type
955 (in the AUX table) says if the type is struct, union, or
956 enum, and points back to the stBlock here. So you can
957 patch the tag kind up later - but only if there actually is
958 a variable or field of that type.
960 So until we know for sure, we will guess at this point.
962 If the first member has index==indexNil or a void type,
963 assume we have an enumeration.
964 Otherwise, if there is more than one member, and all
965 the members have offset 0, assume we have a union.
966 Otherwise, assume we have a struct.
968 The heuristic could guess wrong in the case of of an
969 enumeration with no members or a union with one (or zero)
970 members, or when all except the last field of a struct have
971 width zero. These are uncommon and/or illegal situations,
972 and in any case guessing wrong probably doesn't matter
975 But if we later do find out we were wrong, we fixup the tag
976 kind. Members of an enumeration must be handled
977 differently from struct/union fields, and that is harder to
978 patch up, but luckily we shouldn't need to. (If there are
979 any enumeration members, we can tell for sure it's an enum
982 if (type_code == TYPE_CODE_UNDEF)
984 if (nfields > 1 && max_value == 0)
985 type_code = TYPE_CODE_UNION;
987 type_code = TYPE_CODE_STRUCT;
990 /* Create a new type or use the pending type. */
991 pend = is_pending_symbol (cur_fdr, ext_sh);
992 if (pend == (struct mdebug_pending *) NULL)
995 add_pending (cur_fdr, ext_sh, t);
1000 /* Do not set the tag name if it is a compiler generated tag name
1001 (.Fxx or .xxfake or empty) for unnamed struct/union/enums.
1002 Alpha cc puts out an sh->iss of zero for those. */
1003 if (sh->iss == 0 || name[0] == '.' || name[0] == '\0')
1004 TYPE_TAG_NAME (t) = NULL;
1006 TYPE_TAG_NAME (t) = obconcat (&mdebugread_objfile->objfile_obstack,
1007 name, (char *) NULL);
1009 TYPE_CODE (t) = type_code;
1010 TYPE_LENGTH (t) = sh->value;
1011 TYPE_NFIELDS (t) = nfields;
1012 TYPE_FIELDS (t) = f = ((struct field *)
1014 nfields * sizeof (struct field)));
1016 if (type_code == TYPE_CODE_ENUM)
1018 int unsigned_enum = 1;
1020 /* This is a non-empty enum. */
1022 /* DEC c89 has the number of enumerators in the sh.value field,
1023 not the type length, so we have to compensate for that
1024 incompatibility quirk.
1025 This might do the wrong thing for an enum with one or two
1026 enumerators and gcc -gcoff -fshort-enums, but these cases
1027 are hopefully rare enough.
1028 Alpha cc -migrate has a sh.value field of zero, we adjust
1030 if (TYPE_LENGTH (t) == TYPE_NFIELDS (t)
1031 || TYPE_LENGTH (t) == 0)
1032 TYPE_LENGTH (t) = gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT;
1033 for (ext_tsym = ext_sh + external_sym_size;
1035 ext_tsym += external_sym_size)
1038 struct symbol *enum_sym;
1040 (*swap_sym_in) (cur_bfd, ext_tsym, &tsym);
1042 if (tsym.st != stMember)
1045 SET_FIELD_ENUMVAL (*f, tsym.value);
1046 FIELD_TYPE (*f) = t;
1047 FIELD_NAME (*f) = debug_info->ss + cur_fdr->issBase + tsym.iss;
1048 FIELD_BITSIZE (*f) = 0;
1050 enum_sym = allocate_symbol (mdebugread_objfile);
1051 SYMBOL_SET_LINKAGE_NAME
1053 obstack_copy0 (&mdebugread_objfile->objfile_obstack,
1054 f->name, strlen (f->name)));
1055 SYMBOL_ACLASS_INDEX (enum_sym) = LOC_CONST;
1056 SYMBOL_TYPE (enum_sym) = t;
1057 SYMBOL_DOMAIN (enum_sym) = VAR_DOMAIN;
1058 SYMBOL_VALUE (enum_sym) = tsym.value;
1059 if (SYMBOL_VALUE (enum_sym) < 0)
1061 add_symbol (enum_sym, top_stack->cur_st, top_stack->cur_block);
1063 /* Skip the stMembers that we've handled. */
1068 TYPE_UNSIGNED (t) = 1;
1070 /* Make this the current type. */
1071 top_stack->cur_type = t;
1072 top_stack->cur_field = 0;
1074 /* Do not create a symbol for alpha cc unnamed structs. */
1078 /* gcc puts out an empty struct for an opaque struct definitions,
1079 do not create a symbol for it either. */
1080 if (TYPE_NFIELDS (t) == 0)
1086 s = new_symbol (name);
1087 SYMBOL_DOMAIN (s) = STRUCT_DOMAIN;
1088 SYMBOL_ACLASS_INDEX (s) = LOC_TYPEDEF;
1089 SYMBOL_VALUE (s) = 0;
1090 SYMBOL_TYPE (s) = t;
1091 add_symbol (s, top_stack->cur_st, top_stack->cur_block);
1094 /* End of local variables shared by struct, union, enum, and
1095 block (as yet unknown struct/union/enum) processing. */
1099 found_ecoff_debugging_info = 1;
1100 /* Beginnning of (code) block. Value of symbol
1101 is the displacement from procedure start. */
1102 push_parse_stack ();
1104 /* Do not start a new block if this is the outermost block of a
1105 procedure. This allows the LOC_BLOCK symbol to point to the
1106 block with the local variables, so funcname::var works. */
1107 if (top_stack->blocktype == stProc
1108 || top_stack->blocktype == stStaticProc)
1110 top_stack->blocktype = stNil;
1114 top_stack->blocktype = stBlock;
1115 b = new_block (NON_FUNCTION_BLOCK);
1116 BLOCK_START (b) = sh->value + top_stack->procadr;
1117 BLOCK_SUPERBLOCK (b) = top_stack->cur_block;
1118 top_stack->cur_block = b;
1119 add_block (b, top_stack->cur_st);
1122 case stEnd: /* end (of anything) */
1123 if (sh->sc == scInfo || SC_IS_COMMON (sh->sc))
1125 /* Finished with type */
1126 top_stack->cur_type = 0;
1128 else if (sh->sc == scText &&
1129 (top_stack->blocktype == stProc ||
1130 top_stack->blocktype == stStaticProc))
1132 /* Finished with procedure */
1133 const struct blockvector *bv
1134 = SYMTAB_BLOCKVECTOR (top_stack->cur_st);
1135 struct mdebug_extra_func_info *e;
1136 struct block *b = top_stack->cur_block;
1137 struct type *ftype = top_stack->cur_type;
1140 BLOCK_END (top_stack->cur_block) += sh->value; /* size */
1142 /* Make up special symbol to contain procedure specific info. */
1143 s = new_symbol (MDEBUG_EFI_SYMBOL_NAME);
1144 SYMBOL_DOMAIN (s) = LABEL_DOMAIN;
1145 SYMBOL_ACLASS_INDEX (s) = LOC_CONST;
1146 SYMBOL_TYPE (s) = objfile_type (mdebugread_objfile)->builtin_void;
1147 e = ((struct mdebug_extra_func_info *)
1148 obstack_alloc (&mdebugread_objfile->objfile_obstack,
1149 sizeof (struct mdebug_extra_func_info)));
1150 memset (e, 0, sizeof (struct mdebug_extra_func_info));
1151 SYMBOL_VALUE_BYTES (s) = (gdb_byte *) e;
1152 e->numargs = top_stack->numargs;
1153 e->pdr.framereg = -1;
1154 add_symbol (s, top_stack->cur_st, top_stack->cur_block);
1156 /* f77 emits proc-level with address bounds==[0,0],
1157 So look for such child blocks, and patch them. */
1158 for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); i++)
1160 struct block *b_bad = BLOCKVECTOR_BLOCK (bv, i);
1162 if (BLOCK_SUPERBLOCK (b_bad) == b
1163 && BLOCK_START (b_bad) == top_stack->procadr
1164 && BLOCK_END (b_bad) == top_stack->procadr)
1166 BLOCK_START (b_bad) = BLOCK_START (b);
1167 BLOCK_END (b_bad) = BLOCK_END (b);
1171 if (TYPE_NFIELDS (ftype) <= 0)
1173 /* No parameter type information is recorded with the function's
1174 type. Set that from the type of the parameter symbols. */
1175 int nparams = top_stack->numargs;
1181 struct block_iterator iter;
1183 TYPE_NFIELDS (ftype) = nparams;
1184 TYPE_FIELDS (ftype) = (struct field *)
1185 TYPE_ALLOC (ftype, nparams * sizeof (struct field));
1188 ALL_BLOCK_SYMBOLS (b, iter, sym)
1190 if (iparams == nparams)
1193 if (SYMBOL_IS_ARGUMENT (sym))
1195 TYPE_FIELD_TYPE (ftype, iparams) = SYMBOL_TYPE (sym);
1196 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
1203 else if (sh->sc == scText && top_stack->blocktype == stBlock)
1205 /* End of (code) block. The value of the symbol is the
1206 displacement from the procedure`s start address of the
1207 end of this block. */
1208 BLOCK_END (top_stack->cur_block) = sh->value + top_stack->procadr;
1210 else if (sh->sc == scText && top_stack->blocktype == stNil)
1212 /* End of outermost block. Pop parse stack and ignore. The
1213 following stEnd of stProc will take care of the block. */
1216 else if (sh->sc == scText && top_stack->blocktype == stFile)
1218 /* End of file. Pop parse stack and ignore. Higher
1219 level code deals with this. */
1223 complaint (&symfile_complaints,
1224 _("stEnd with storage class %d not handled"), sh->sc);
1226 pop_parse_stack (); /* Restore previous lexical context. */
1229 case stMember: /* member of struct or union */
1230 f = &TYPE_FIELDS (top_stack->cur_type)[top_stack->cur_field++];
1231 FIELD_NAME (*f) = name;
1232 SET_FIELD_BITPOS (*f, sh->value);
1234 FIELD_TYPE (*f) = parse_type (cur_fd, ax, sh->index,
1235 &bitsize, bigend, name);
1236 FIELD_BITSIZE (*f) = bitsize;
1239 case stIndirect: /* forward declaration on Irix5 */
1240 /* Forward declarations from Irix5 cc are handled by cross_ref,
1244 case stTypedef: /* type definition */
1245 found_ecoff_debugging_info = 1;
1247 /* Typedefs for forward declarations and opaque structs from alpha cc
1248 are handled by cross_ref, skip them. */
1252 /* Parse the type or use the pending type. */
1253 pend = is_pending_symbol (cur_fdr, ext_sh);
1254 if (pend == (struct mdebug_pending *) NULL)
1256 t = parse_type (cur_fd, ax, sh->index, (int *) NULL, bigend, name);
1257 add_pending (cur_fdr, ext_sh, t);
1262 /* Mips cc puts out a typedef with the name of the struct for forward
1263 declarations. These should not go into the symbol table and
1264 TYPE_NAME should not be set for them.
1265 They can't be distinguished from an intentional typedef to
1266 the same name however:
1268 struct x { int ix; int jx; };
1272 struct xx {int ixx; int jxx; };
1273 generates a cross referencing stTypedef for x and xx.
1274 The user visible effect of this is that the type of a pointer
1275 to struct foo sometimes is given as `foo *' instead of `struct foo *'.
1276 The problem is fixed with alpha cc and Irix5 cc. */
1278 /* However if the typedef cross references to an opaque aggregate, it
1279 is safe to omit it from the symbol table. */
1281 if (has_opaque_xref (cur_fdr, sh))
1283 s = new_symbol (name);
1284 SYMBOL_DOMAIN (s) = VAR_DOMAIN;
1285 SYMBOL_ACLASS_INDEX (s) = LOC_TYPEDEF;
1286 SYMBOL_BLOCK_VALUE (s) = top_stack->cur_block;
1287 SYMBOL_TYPE (s) = t;
1288 add_symbol (s, top_stack->cur_st, top_stack->cur_block);
1290 /* Incomplete definitions of structs should not get a name. */
1291 if (TYPE_NAME (SYMBOL_TYPE (s)) == NULL
1292 && (TYPE_NFIELDS (SYMBOL_TYPE (s)) != 0
1293 || (TYPE_CODE (SYMBOL_TYPE (s)) != TYPE_CODE_STRUCT
1294 && TYPE_CODE (SYMBOL_TYPE (s)) != TYPE_CODE_UNION)))
1296 if (TYPE_CODE (SYMBOL_TYPE (s)) == TYPE_CODE_PTR
1297 || TYPE_CODE (SYMBOL_TYPE (s)) == TYPE_CODE_FUNC)
1299 /* If we are giving a name to a type such as "pointer to
1300 foo" or "function returning foo", we better not set
1301 the TYPE_NAME. If the program contains "typedef char
1302 *caddr_t;", we don't want all variables of type char
1303 * to print as caddr_t. This is not just a
1304 consequence of GDB's type management; CC and GCC (at
1305 least through version 2.4) both output variables of
1306 either type char * or caddr_t with the type
1307 refering to the stTypedef symbol for caddr_t. If a future
1308 compiler cleans this up it GDB is not ready for it
1309 yet, but if it becomes ready we somehow need to
1310 disable this check (without breaking the PCC/GCC2.4
1315 Fortunately, this check seems not to be necessary
1316 for anything except pointers or functions. */
1319 TYPE_NAME (SYMBOL_TYPE (s)) = SYMBOL_LINKAGE_NAME (s);
1323 case stFile: /* file name */
1324 push_parse_stack ();
1325 top_stack->blocktype = sh->st;
1328 /* I`ve never seen these for C */
1330 break; /* register relocation */
1332 break; /* forwarding address */
1334 break; /* constant */
1336 complaint (&symfile_complaints, _("unknown symbol type 0x%x"), sh->st);
1345 static const struct objfile_data *basic_type_data;
1347 static struct type *
1348 basic_type (int bt, struct objfile *objfile)
1350 struct gdbarch *gdbarch = get_objfile_arch (objfile);
1351 struct type **map_bt = objfile_data (objfile, basic_type_data);
1359 map_bt = OBSTACK_CALLOC (&objfile->objfile_obstack,
1360 btMax, struct type *);
1361 set_objfile_data (objfile, basic_type_data, map_bt);
1370 tp = objfile_type (objfile)->builtin_void;
1374 tp = init_type (TYPE_CODE_PTR, 4, TYPE_FLAG_UNSIGNED,
1376 TYPE_TARGET_TYPE (tp) = objfile_type (objfile)->builtin_void;
1380 tp = init_type (TYPE_CODE_INT, 1, 0,
1385 tp = init_type (TYPE_CODE_INT, 1, TYPE_FLAG_UNSIGNED,
1386 "unsigned char", objfile);
1390 tp = init_type (TYPE_CODE_INT, 2, 0,
1395 tp = init_type (TYPE_CODE_INT, 2, TYPE_FLAG_UNSIGNED,
1396 "unsigned short", objfile);
1400 tp = init_type (TYPE_CODE_INT, 4, 0,
1405 tp = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
1406 "unsigned int", objfile);
1410 tp = init_type (TYPE_CODE_INT, 4, 0,
1415 tp = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
1416 "unsigned long", objfile);
1420 tp = init_type (TYPE_CODE_FLT,
1421 gdbarch_float_bit (gdbarch) / TARGET_CHAR_BIT, 0,
1426 tp = init_type (TYPE_CODE_FLT,
1427 gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT, 0,
1432 tp = init_type (TYPE_CODE_COMPLEX,
1433 2 * gdbarch_float_bit (gdbarch) / TARGET_CHAR_BIT, 0,
1434 "complex", objfile);
1435 TYPE_TARGET_TYPE (tp) = basic_type (btFloat, objfile);
1439 tp = init_type (TYPE_CODE_COMPLEX,
1440 2 * gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT, 0,
1441 "double complex", objfile);
1442 TYPE_TARGET_TYPE (tp) = basic_type (btDouble, objfile);
1446 /* We use TYPE_CODE_INT to print these as integers. Does this do any
1447 good? Would we be better off with TYPE_CODE_ERROR? Should
1448 TYPE_CODE_ERROR print things in hex if it knows the size? */
1449 tp = init_type (TYPE_CODE_INT,
1450 gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT, 0,
1451 "fixed decimal", objfile);
1455 tp = init_type (TYPE_CODE_ERROR,
1456 gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT, 0,
1457 "floating decimal", objfile);
1461 /* Is a "string" the way btString means it the same as TYPE_CODE_STRING?
1463 tp = init_type (TYPE_CODE_STRING, 1, 0,
1468 tp = objfile_type (objfile)->builtin_void;
1472 tp = init_type (TYPE_CODE_INT, 8, 0,
1477 tp = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED,
1478 "unsigned long", objfile);
1482 tp = init_type (TYPE_CODE_INT, 8, 0,
1483 "long long", objfile);
1487 tp = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED,
1488 "unsigned long long", objfile);
1492 tp = init_type (TYPE_CODE_PTR, 8, TYPE_FLAG_UNSIGNED,
1494 TYPE_TARGET_TYPE (tp) = objfile_type (objfile)->builtin_void;
1498 tp = init_type (TYPE_CODE_INT, 8, 0,
1503 tp = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED,
1504 "unsigned int", objfile);
1516 /* Parse the type information provided in the raw AX entries for
1517 the symbol SH. Return the bitfield size in BS, in case.
1518 We must byte-swap the AX entries before we use them; BIGEND says whether
1519 they are big-endian or little-endian (from fh->fBigendian). */
1521 static struct type *
1522 parse_type (int fd, union aux_ext *ax, unsigned int aux_index, int *bs,
1523 int bigend, char *sym_name)
1526 struct type *tp = 0;
1527 enum type_code type_code = TYPE_CODE_UNDEF;
1529 /* Handle undefined types, they have indexNil. */
1530 if (aux_index == indexNil)
1531 return basic_type (btInt, mdebugread_objfile);
1533 /* Handle corrupt aux indices. */
1534 if (aux_index >= (debug_info->fdr + fd)->caux)
1536 index_complaint (sym_name);
1537 return basic_type (btInt, mdebugread_objfile);
1541 /* Use aux as a type information record, map its basic type. */
1542 (*debug_swap->swap_tir_in) (bigend, &ax->a_ti, t);
1543 tp = basic_type (t->bt, mdebugread_objfile);
1546 /* Cannot use builtin types -- build our own. */
1550 type_code = TYPE_CODE_STRUCT;
1553 type_code = TYPE_CODE_UNION;
1556 type_code = TYPE_CODE_ENUM;
1559 type_code = TYPE_CODE_RANGE;
1562 type_code = TYPE_CODE_SET;
1565 /* alpha cc -migrate uses this for typedefs. The true type will
1566 be obtained by crossreferencing below. */
1567 type_code = TYPE_CODE_ERROR;
1570 /* alpha cc uses this for typedefs. The true type will be
1571 obtained by crossreferencing below. */
1572 type_code = TYPE_CODE_ERROR;
1575 basic_type_complaint (t->bt, sym_name);
1576 return basic_type (btInt, mdebugread_objfile);
1580 /* Move on to next aux. */
1585 int width = AUX_GET_WIDTH (bigend, ax);
1587 /* Inhibit core dumps if TIR is corrupted. */
1588 if (bs == (int *) NULL)
1590 /* Alpha cc -migrate encodes char and unsigned char types
1591 as short and unsigned short types with a field width of 8.
1592 Enum types also have a field width which we ignore for now. */
1593 if (t->bt == btShort && width == 8)
1594 tp = basic_type (btChar, mdebugread_objfile);
1595 else if (t->bt == btUShort && width == 8)
1596 tp = basic_type (btUChar, mdebugread_objfile);
1597 else if (t->bt == btEnum)
1600 complaint (&symfile_complaints,
1601 _("can't handle TIR fBitfield for %s"),
1609 /* A btIndirect entry cross references to an aux entry containing
1611 if (t->bt == btIndirect)
1618 (*debug_swap->swap_rndx_in) (bigend, &ax->a_rndx, rn);
1620 if (rn->rfd == 0xfff)
1622 rf = AUX_GET_ISYM (bigend, ax);
1630 complaint (&symfile_complaints,
1631 _("unable to cross ref btIndirect for %s"), sym_name);
1632 return basic_type (btInt, mdebugread_objfile);
1634 xref_fh = get_rfd (fd, rf);
1635 xref_fd = xref_fh - debug_info->fdr;
1636 tp = parse_type (xref_fd, debug_info->external_aux + xref_fh->iauxBase,
1637 rn->index, (int *) NULL, xref_fh->fBigendian, sym_name);
1640 /* All these types really point to some (common) MIPS type
1641 definition, and only the type-qualifiers fully identify
1642 them. We'll make the same effort at sharing. */
1643 if (t->bt == btStruct ||
1647 /* btSet (I think) implies that the name is a tag name, not a typedef
1648 name. This apparently is a MIPS extension for C sets. */
1653 /* Try to cross reference this type, build new type on failure. */
1654 ax += cross_ref (fd, ax, &tp, type_code, &name, bigend, sym_name);
1655 if (tp == (struct type *) NULL)
1656 tp = init_type (type_code, 0, 0, (char *) NULL, mdebugread_objfile);
1658 /* DEC c89 produces cross references to qualified aggregate types,
1659 dereference them. */
1660 while (TYPE_CODE (tp) == TYPE_CODE_PTR
1661 || TYPE_CODE (tp) == TYPE_CODE_ARRAY)
1662 tp = TYPE_TARGET_TYPE (tp);
1664 /* Make sure that TYPE_CODE(tp) has an expected type code.
1665 Any type may be returned from cross_ref if file indirect entries
1667 if (TYPE_CODE (tp) != TYPE_CODE_STRUCT
1668 && TYPE_CODE (tp) != TYPE_CODE_UNION
1669 && TYPE_CODE (tp) != TYPE_CODE_ENUM)
1671 unexpected_type_code_complaint (sym_name);
1675 /* Usually, TYPE_CODE(tp) is already type_code. The main
1676 exception is if we guessed wrong re struct/union/enum.
1677 But for struct vs. union a wrong guess is harmless, so
1678 don't complain(). */
1679 if ((TYPE_CODE (tp) == TYPE_CODE_ENUM
1680 && type_code != TYPE_CODE_ENUM)
1681 || (TYPE_CODE (tp) != TYPE_CODE_ENUM
1682 && type_code == TYPE_CODE_ENUM))
1684 bad_tag_guess_complaint (sym_name);
1687 if (TYPE_CODE (tp) != type_code)
1689 TYPE_CODE (tp) = type_code;
1692 /* Do not set the tag name if it is a compiler generated tag name
1693 (.Fxx or .xxfake or empty) for unnamed struct/union/enums. */
1694 if (name[0] == '.' || name[0] == '\0')
1695 TYPE_TAG_NAME (tp) = NULL;
1696 else if (TYPE_TAG_NAME (tp) == NULL
1697 || strcmp (TYPE_TAG_NAME (tp), name) != 0)
1699 = obstack_copy0 (&mdebugread_objfile->objfile_obstack,
1700 name, strlen (name));
1704 /* All these types really point to some (common) MIPS type
1705 definition, and only the type-qualifiers fully identify
1706 them. We'll make the same effort at sharing.
1707 FIXME: We are not doing any guessing on range types. */
1708 if (t->bt == btRange)
1712 /* Try to cross reference this type, build new type on failure. */
1713 ax += cross_ref (fd, ax, &tp, type_code, &name, bigend, sym_name);
1714 if (tp == (struct type *) NULL)
1715 tp = init_type (type_code, 0, 0, (char *) NULL, mdebugread_objfile);
1717 /* Make sure that TYPE_CODE(tp) has an expected type code.
1718 Any type may be returned from cross_ref if file indirect entries
1720 if (TYPE_CODE (tp) != TYPE_CODE_RANGE)
1722 unexpected_type_code_complaint (sym_name);
1726 /* Usually, TYPE_CODE(tp) is already type_code. The main
1727 exception is if we guessed wrong re struct/union/enum. */
1728 if (TYPE_CODE (tp) != type_code)
1730 bad_tag_guess_complaint (sym_name);
1731 TYPE_CODE (tp) = type_code;
1733 if (TYPE_NAME (tp) == NULL
1734 || strcmp (TYPE_NAME (tp), name) != 0)
1736 = obstack_copy0 (&mdebugread_objfile->objfile_obstack,
1737 name, strlen (name));
1740 if (t->bt == btTypedef)
1744 /* Try to cross reference this type, it should succeed. */
1745 ax += cross_ref (fd, ax, &tp, type_code, &name, bigend, sym_name);
1746 if (tp == (struct type *) NULL)
1748 complaint (&symfile_complaints,
1749 _("unable to cross ref btTypedef for %s"), sym_name);
1750 tp = basic_type (btInt, mdebugread_objfile);
1754 /* Deal with range types. */
1755 if (t->bt == btRange)
1757 TYPE_NFIELDS (tp) = 0;
1758 TYPE_RANGE_DATA (tp) = ((struct range_bounds *)
1759 TYPE_ZALLOC (tp, sizeof (struct range_bounds)));
1760 TYPE_LOW_BOUND (tp) = AUX_GET_DNLOW (bigend, ax);
1762 TYPE_HIGH_BOUND (tp) = AUX_GET_DNHIGH (bigend, ax);
1766 /* Parse all the type qualifiers now. If there are more
1767 than 6 the game will continue in the next aux. */
1771 #define PARSE_TQ(tq) \
1772 if (t->tq != tqNil) \
1773 ax += upgrade_type(fd, &tp, t->tq, ax, bigend, sym_name); \
1785 /* mips cc 2.x and gcc never put out continued aux entries. */
1789 (*debug_swap->swap_tir_in) (bigend, &ax->a_ti, t);
1793 /* Complain for illegal continuations due to corrupt aux entries. */
1795 complaint (&symfile_complaints,
1796 _("illegal TIR continued for %s"), sym_name);
1801 /* Make up a complex type from a basic one. Type is passed by
1802 reference in TPP and side-effected as necessary. The type
1803 qualifier TQ says how to handle the aux symbols at AX for
1804 the symbol SX we are currently analyzing. BIGEND says whether
1805 aux symbols are big-endian or little-endian.
1806 Returns the number of aux symbols we parsed. */
1809 upgrade_type (int fd, struct type **tpp, int tq, union aux_ext *ax, int bigend,
1815 /* Used in array processing. */
1826 t = lookup_pointer_type (*tpp);
1831 t = lookup_function_type (*tpp);
1838 /* Determine and record the domain type (type of index). */
1839 (*debug_swap->swap_rndx_in) (bigend, &ax->a_rndx, &rndx);
1845 rf = AUX_GET_ISYM (bigend, ax);
1848 fh = get_rfd (fd, rf);
1850 indx = parse_type (fh - debug_info->fdr,
1851 debug_info->external_aux + fh->iauxBase,
1852 id, (int *) NULL, bigend, sym_name);
1854 /* The bounds type should be an integer type, but might be anything
1855 else due to corrupt aux entries. */
1856 if (TYPE_CODE (indx) != TYPE_CODE_INT)
1858 complaint (&symfile_complaints,
1859 _("illegal array index type for %s, assuming int"),
1861 indx = objfile_type (mdebugread_objfile)->builtin_int;
1864 /* Get the bounds, and create the array type. */
1866 lower = AUX_GET_DNLOW (bigend, ax);
1868 upper = AUX_GET_DNHIGH (bigend, ax);
1870 rf = AUX_GET_WIDTH (bigend, ax); /* bit size of array element */
1872 range = create_static_range_type ((struct type *) NULL, indx,
1875 t = create_array_type ((struct type *) NULL, *tpp, range);
1877 /* We used to fill in the supplied array element bitsize
1878 here if the TYPE_LENGTH of the target type was zero.
1879 This happens for a `pointer to an array of anonymous structs',
1880 but in this case the array element bitsize is also zero,
1881 so nothing is gained.
1882 And we used to check the TYPE_LENGTH of the target type against
1883 the supplied array element bitsize.
1884 gcc causes a mismatch for `pointer to array of object',
1885 since the sdb directives it uses do not have a way of
1886 specifying the bitsize, but it does no harm (the
1887 TYPE_LENGTH should be correct) and we should be able to
1888 ignore the erroneous bitsize from the auxiliary entry safely.
1889 dbx seems to ignore it too. */
1891 /* TYPE_TARGET_STUB now takes care of the zero TYPE_LENGTH problem. */
1892 if (TYPE_LENGTH (*tpp) == 0)
1893 TYPE_TARGET_STUB (t) = 1;
1899 /* Volatile -- currently ignored */
1903 /* Const -- currently ignored */
1907 complaint (&symfile_complaints, _("unknown type qualifier 0x%x"), tq);
1913 /* Parse a procedure descriptor record PR. Note that the procedure is
1914 parsed _after_ the local symbols, now we just insert the extra
1915 information we need into a MDEBUG_EFI_SYMBOL_NAME symbol that has
1916 already been placed in the procedure's main block. Note also that
1917 images that have been partially stripped (ld -x) have been deprived
1918 of local symbols, and we have to cope with them here. FIRST_OFF is
1919 the offset of the first procedure for this FDR; we adjust the
1920 address by this amount, but I don't know why. SEARCH_SYMTAB is the symtab
1921 to look for the function which contains the MDEBUG_EFI_SYMBOL_NAME symbol
1922 in question, or NULL to use top_stack->cur_block. */
1925 parse_procedure (PDR *pr, struct compunit_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 (COMPUNIT_BLOCKVECTOR (search_symtab),
1994 s = mylookup_symbol (sh_name, top_stack->cur_block,
1995 VAR_DOMAIN, LOC_BLOCK);
1999 b = SYMBOL_BLOCK_VALUE (s);
2003 complaint (&symfile_complaints, _("PDR for %s, but no symbol"), sh_name);
2007 /* FIXME -- delete. We can't do symbol allocation now; it's all done. */
2008 s = new_symbol (sh_name);
2009 SYMBOL_DOMAIN (s) = VAR_DOMAIN;
2010 SYMBOL_CLASS (s) = LOC_BLOCK;
2011 /* Donno its type, hope int is ok. */
2013 = lookup_function_type (objfile_type (pst->objfile)->builtin_int);
2014 add_symbol (s, top_stack->cur_st, top_stack->cur_block);
2015 /* Won't have symbols for this one. */
2017 SYMBOL_BLOCK_VALUE (s) = b;
2018 BLOCK_FUNCTION (b) = s;
2019 BLOCK_START (b) = pr->adr;
2020 /* BOUND used to be the end of procedure's text, but the
2021 argument is no longer passed in. */
2022 BLOCK_END (b) = bound;
2023 BLOCK_SUPERBLOCK (b) = top_stack->cur_block;
2024 add_block (b, top_stack->cur_st);
2028 i = mylookup_symbol (MDEBUG_EFI_SYMBOL_NAME, b, LABEL_DOMAIN, LOC_CONST);
2032 struct mdebug_extra_func_info *e;
2034 e = (struct mdebug_extra_func_info *) SYMBOL_VALUE_BYTES (i);
2037 /* GDB expects the absolute function start address for the
2038 procedure descriptor in e->pdr.adr.
2039 As the address in the procedure descriptor is usually relative,
2040 we would have to relocate e->pdr.adr with cur_fdr->adr and
2041 ANOFFSET (pst->section_offsets, SECT_OFF_TEXT (pst->objfile)).
2042 Unfortunately cur_fdr->adr and e->pdr.adr are both absolute
2043 in shared libraries on some systems, and on other systems
2044 e->pdr.adr is sometimes offset by a bogus value.
2045 To work around these problems, we replace e->pdr.adr with
2046 the start address of the function. */
2047 e->pdr.adr = BLOCK_START (b);
2050 /* It would be reasonable that functions that have been compiled
2051 without debugging info have a btNil type for their return value,
2052 and functions that are void and are compiled with debugging info
2054 gcc and DEC f77 put out btNil types for both cases, so btNil is mapped
2055 to TYPE_CODE_VOID in parse_type to get the `compiled with debugging info'
2057 The glevel field in cur_fdr could be used to determine the presence
2058 of debugging info, but GCC doesn't always pass the -g switch settings
2059 to the assembler and GAS doesn't set the glevel field from the -g switch
2061 To work around these problems, the return value type of a TYPE_CODE_VOID
2062 function is adjusted accordingly if no debugging info was found in the
2063 compilation unit. */
2065 if (processing_gcc_compilation == 0
2066 && found_ecoff_debugging_info == 0
2067 && TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (s))) == TYPE_CODE_VOID)
2068 SYMBOL_TYPE (s) = objfile_type (mdebugread_objfile)->nodebug_text_symbol;
2071 /* Parse the external symbol ES. Just call parse_symbol() after
2072 making sure we know where the aux are for it.
2073 BIGEND says whether aux entries are big-endian or little-endian.
2075 This routine clobbers top_stack->cur_block and ->cur_st. */
2077 static void parse_external (EXTR *, int, struct section_offsets *,
2081 parse_external (EXTR *es, int bigend, struct section_offsets *section_offsets,
2082 struct objfile *objfile)
2086 if (es->ifd != ifdNil)
2089 cur_fdr = debug_info->fdr + cur_fd;
2090 ax = debug_info->external_aux + cur_fdr->iauxBase;
2094 cur_fdr = debug_info->fdr;
2098 /* Reading .o files */
2099 if (SC_IS_UNDEF (es->asym.sc) || es->asym.sc == scNil)
2102 switch (es->asym.st)
2105 /* These are generated for static symbols in .o files,
2126 /* FIXME: Turn this into a complaint? */
2128 printf_filtered (_("Warning: %s `%s' is undefined (in %s)\n"),
2129 what, debug_info->ssext + es->asym.iss,
2130 fdr_name (cur_fdr));
2134 switch (es->asym.st)
2138 /* There is no need to parse the external procedure symbols.
2139 If they are from objects compiled without -g, their index will
2140 be indexNil, and the symbol definition from the minimal symbol
2141 is preferrable (yielding a function returning int instead of int).
2142 If the index points to a local procedure symbol, the local
2143 symbol already provides the correct type.
2144 Note that the index of the external procedure symbol points
2145 to the local procedure symbol in the local symbol table, and
2146 _not_ to the auxiliary symbol info. */
2150 /* Global common symbols are resolved by the runtime loader,
2152 if (SC_IS_COMMON (es->asym.sc))
2155 /* Note that the case of a symbol with indexNil must be handled
2156 anyways by parse_symbol(). */
2157 parse_symbol (&es->asym, ax, (char *) NULL,
2158 bigend, section_offsets, objfile);
2165 /* Parse the line number info for file descriptor FH into
2166 GDB's linetable LT. MIPS' encoding requires a little bit
2167 of magic to get things out. Note also that MIPS' line
2168 numbers can go back and forth, apparently we can live
2169 with that and do not need to reorder our linetables. */
2171 static void parse_lines (FDR *, PDR *, struct linetable *, int,
2172 struct partial_symtab *, CORE_ADDR);
2175 parse_lines (FDR *fh, PDR *pr, struct linetable *lt, int maxlines,
2176 struct partial_symtab *pst, CORE_ADDR lowest_pdr_addr)
2178 unsigned char *base;
2180 int delta, count, lineno = 0;
2182 if (fh->cbLine == 0)
2185 /* Scan by procedure descriptors. */
2187 for (j = 0; j < fh->cpd; j++, pr++)
2191 unsigned char *halt;
2193 /* No code for this one. */
2194 if (pr->iline == ilineNil ||
2195 pr->lnLow == -1 || pr->lnHigh == -1)
2198 /* Determine start and end address of compressed line bytes for
2200 base = debug_info->line + fh->cbLineOffset;
2201 if (j != (fh->cpd - 1))
2202 halt = base + pr[1].cbLineOffset;
2204 halt = base + fh->cbLine;
2205 base += pr->cbLineOffset;
2207 adr = pst->textlow + pr->adr - lowest_pdr_addr;
2209 l = adr >> 2; /* in words */
2210 for (lineno = pr->lnLow; base < halt;)
2212 count = *base & 0x0f;
2213 delta = *base++ >> 4;
2218 delta = (base[0] << 8) | base[1];
2219 if (delta >= 0x8000)
2223 lineno += delta; /* first delta is 0 */
2225 /* Complain if the line table overflows. Could happen
2226 with corrupt binaries. */
2227 if (lt->nitems >= maxlines)
2229 complaint (&symfile_complaints,
2230 _("guessed size of linetable for %s incorrectly"),
2234 k = add_line (lt, lineno, l, k);
2241 function_outside_compilation_unit_complaint (const char *arg1)
2243 complaint (&symfile_complaints,
2244 _("function `%s' appears to be defined "
2245 "outside of all compilation units"),
2249 /* Use the STORAGE_CLASS to compute which section the given symbol
2250 belongs to, and then records this new minimal symbol. */
2253 record_minimal_symbol (const char *name, const CORE_ADDR address,
2254 enum minimal_symbol_type ms_type, int storage_class,
2255 struct objfile *objfile)
2259 switch (storage_class)
2262 section = SECT_OFF_TEXT (objfile);
2265 section = SECT_OFF_DATA (objfile);
2268 section = SECT_OFF_BSS (objfile);
2271 section = get_section_index (objfile, ".sdata");
2274 section = get_section_index (objfile, ".sbss");
2277 section = get_section_index (objfile, ".rdata");
2280 section = get_section_index (objfile, ".init");
2283 section = get_section_index (objfile, ".xdata");
2286 section = get_section_index (objfile, ".pdata");
2289 section = get_section_index (objfile, ".fini");
2292 section = get_section_index (objfile, ".rconst");
2296 section = get_section_index (objfile, ".tlsdata");
2301 section = get_section_index (objfile, ".tlsbss");
2305 /* This kind of symbol is not associated to a section. */
2309 prim_record_minimal_symbol_and_info (name, address, ms_type,
2313 /* Master parsing procedure for first-pass reading of file symbols
2314 into a partial_symtab. */
2317 parse_partial_symbols (struct objfile *objfile)
2319 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2320 const bfd_size_type external_sym_size = debug_swap->external_sym_size;
2321 const bfd_size_type external_rfd_size = debug_swap->external_rfd_size;
2322 const bfd_size_type external_ext_size = debug_swap->external_ext_size;
2323 void (*const swap_ext_in) (bfd *, void *, EXTR *) = debug_swap->swap_ext_in;
2324 void (*const swap_sym_in) (bfd *, void *, SYMR *) = debug_swap->swap_sym_in;
2325 void (*const swap_rfd_in) (bfd *, void *, RFDT *) = debug_swap->swap_rfd_in;
2327 HDRR *hdr = &debug_info->symbolic_header;
2328 /* Running pointers */
2336 struct partial_symtab *pst;
2337 int textlow_not_set = 1;
2338 int past_first_source_file = 0;
2340 /* List of current psymtab's include files. */
2341 const char **psymtab_include_list;
2342 int includes_allocated;
2345 struct pst_map *fdr_to_pst;
2346 /* Index within current psymtab dependency list. */
2347 struct partial_symtab **dependency_list;
2348 int dependencies_used, dependencies_allocated;
2349 struct cleanup *old_chain;
2351 enum language prev_language;
2352 asection *text_sect;
2353 int relocatable = 0;
2355 /* Irix 5.2 shared libraries have a fh->adr field of zero, but
2356 the shared libraries are prelinked at a high memory address.
2357 We have to adjust the start address of the object file for this case,
2358 by setting it to the start address of the first procedure in the file.
2359 But we should do no adjustments if we are debugging a .o file, where
2360 the text section (and fh->adr) really starts at zero. */
2361 text_sect = bfd_get_section_by_name (cur_bfd, ".text");
2362 if (text_sect != NULL
2363 && (bfd_get_section_flags (cur_bfd, text_sect) & SEC_RELOC))
2366 extern_tab = (EXTR *) obstack_alloc (&objfile->objfile_obstack,
2367 sizeof (EXTR) * hdr->iextMax);
2369 includes_allocated = 30;
2371 psymtab_include_list = (const char **) alloca (includes_allocated *
2372 sizeof (const char *));
2373 next_symbol_text_func = mdebug_next_symbol_text;
2375 dependencies_allocated = 30;
2376 dependencies_used = 0;
2378 (struct partial_symtab **) alloca (dependencies_allocated *
2379 sizeof (struct partial_symtab *));
2381 set_last_source_file (NULL);
2386 * Only parse the Local and External symbols, and the Relative FDR.
2387 * Fixup enough of the loader symtab to be able to use it.
2388 * Allocate space only for the file's portions we need to
2393 max_glevel = MIN_GLEVEL;
2395 /* Allocate the map FDR -> PST.
2396 Minor hack: -O3 images might claim some global data belongs
2397 to FDR -1. We`ll go along with that. */
2398 fdr_to_pst = (struct pst_map *)
2399 xzalloc ((hdr->ifdMax + 1) * sizeof *fdr_to_pst);
2400 old_chain = make_cleanup (xfree, fdr_to_pst);
2403 struct partial_symtab *pst = new_psymtab ("", objfile);
2405 fdr_to_pst[-1].pst = pst;
2409 /* Allocate the global pending list. */
2411 ((struct mdebug_pending **)
2412 obstack_alloc (&objfile->objfile_obstack,
2413 hdr->ifdMax * sizeof (struct mdebug_pending *)));
2414 memset (pending_list, 0,
2415 hdr->ifdMax * sizeof (struct mdebug_pending *));
2417 /* Pass 0 over external syms: swap them in. */
2418 ext_block = (EXTR *) xmalloc (hdr->iextMax * sizeof (EXTR));
2419 make_cleanup (xfree, ext_block);
2421 ext_out = (char *) debug_info->external_ext;
2422 ext_out_end = ext_out + hdr->iextMax * external_ext_size;
2424 for (; ext_out < ext_out_end; ext_out += external_ext_size, ext_in++)
2425 (*swap_ext_in) (cur_bfd, ext_out, ext_in);
2427 /* Pass 1 over external syms: Presize and partition the list. */
2429 ext_in_end = ext_in + hdr->iextMax;
2430 for (; ext_in < ext_in_end; ext_in++)
2432 /* See calls to complain below. */
2433 if (ext_in->ifd >= -1
2434 && ext_in->ifd < hdr->ifdMax
2435 && ext_in->asym.iss >= 0
2436 && ext_in->asym.iss < hdr->issExtMax)
2437 fdr_to_pst[ext_in->ifd].n_globals++;
2440 /* Pass 1.5 over files: partition out global symbol space. */
2442 for (f_idx = -1; f_idx < hdr->ifdMax; f_idx++)
2444 fdr_to_pst[f_idx].globals_offset = s_idx;
2445 s_idx += fdr_to_pst[f_idx].n_globals;
2446 fdr_to_pst[f_idx].n_globals = 0;
2451 For ECOFF in ELF, we skip the creation of the minimal symbols.
2452 The ECOFF symbols should be a subset of the Elf symbols, and the
2453 section information of the elf symbols will be more accurate.
2454 FIXME! What about Irix 5's native linker?
2456 By default, Elf sections which don't exist in ECOFF
2457 get put in ECOFF's absolute section by the gnu linker.
2458 Since absolute sections don't get relocated, we
2459 end up calculating an address different from that of
2460 the symbol's minimal symbol (created earlier from the
2463 To fix this, either :
2464 1) don't create the duplicate symbol
2465 (assumes ECOFF symtab is a subset of the ELF symtab;
2466 assumes no side-effects result from ignoring ECOFF symbol)
2467 2) create it, only if lookup for existing symbol in ELF's minimal
2470 assumes no side-effects result from ignoring ECOFF symbol)
2471 3) create it, but lookup ELF's minimal symbol and use it's section
2472 during relocation, then modify "uniqify" phase to merge and
2473 eliminate the duplicate symbol
2474 (highly inefficient)
2476 I've implemented #1 here...
2477 Skip the creation of the minimal symbols based on the ECOFF
2480 /* Pass 2 over external syms: fill in external symbols. */
2482 ext_in_end = ext_in + hdr->iextMax;
2483 for (; ext_in < ext_in_end; ext_in++)
2485 enum minimal_symbol_type ms_type = mst_text;
2486 CORE_ADDR svalue = ext_in->asym.value;
2488 /* The Irix 5 native tools seem to sometimes generate bogus
2489 external symbols. */
2490 if (ext_in->ifd < -1 || ext_in->ifd >= hdr->ifdMax)
2492 complaint (&symfile_complaints,
2493 _("bad ifd for external symbol: %d (max %ld)"),
2494 ext_in->ifd, hdr->ifdMax);
2497 if (ext_in->asym.iss < 0 || ext_in->asym.iss >= hdr->issExtMax)
2499 complaint (&symfile_complaints,
2500 _("bad iss for external symbol: %ld (max %ld)"),
2501 ext_in->asym.iss, hdr->issExtMax);
2505 extern_tab[fdr_to_pst[ext_in->ifd].globals_offset
2506 + fdr_to_pst[ext_in->ifd].n_globals++] = *ext_in;
2509 if (SC_IS_UNDEF (ext_in->asym.sc) || ext_in->asym.sc == scNil)
2513 /* Pass 3 over files, over local syms: fill in static symbols. */
2514 name = debug_info->ssext + ext_in->asym.iss;
2516 /* Process ECOFF Symbol Types and Storage Classes. */
2517 switch (ext_in->asym.st)
2520 /* Beginnning of Procedure */
2523 /* Load time only static procs */
2524 ms_type = mst_file_text;
2527 /* External symbol */
2528 if (SC_IS_COMMON (ext_in->asym.sc))
2530 /* The value of a common symbol is its size, not its address.
2534 else if (SC_IS_DATA (ext_in->asym.sc))
2538 else if (SC_IS_BSS (ext_in->asym.sc))
2542 else if (SC_IS_SBSS (ext_in->asym.sc))
2552 /* On certain platforms, some extra label symbols can be
2553 generated by the linker. One possible usage for this kind
2554 of symbols is to represent the address of the begining of a
2555 given section. For instance, on Tru64 5.1, the address of
2556 the _ftext label is the start address of the .text section.
2558 The storage class of these symbols is usually directly
2559 related to the section to which the symbol refers. For
2560 instance, on Tru64 5.1, the storage class for the _fdata
2561 label is scData, refering to the .data section.
2563 It is actually possible that the section associated to the
2564 storage class of the label does not exist. On True64 5.1
2565 for instance, the libm.so shared library does not contain
2566 any .data section, although it contains a _fpdata label
2567 which storage class is scData... Since these symbols are
2568 usually useless for the debugger user anyway, we just
2569 discard these symbols. */
2571 if (SC_IS_TEXT (ext_in->asym.sc))
2573 if (objfile->sect_index_text == -1)
2576 ms_type = mst_file_text;
2578 else if (SC_IS_DATA (ext_in->asym.sc))
2580 if (objfile->sect_index_data == -1)
2583 ms_type = mst_file_data;
2585 else if (SC_IS_BSS (ext_in->asym.sc))
2587 if (objfile->sect_index_bss == -1)
2590 ms_type = mst_file_bss;
2592 else if (SC_IS_SBSS (ext_in->asym.sc))
2594 const int sbss_sect_index = get_section_index (objfile, ".sbss");
2596 if (sbss_sect_index == -1)
2599 ms_type = mst_file_bss;
2606 /* The alpha has the section start addresses in stLocal symbols
2607 whose name starts with a `.'. Skip those but complain for all
2608 other stLocal symbols.
2609 Irix6 puts the section start addresses in stNil symbols, skip
2615 ms_type = mst_unknown;
2616 unknown_ext_complaint (name);
2618 if (!ECOFF_IN_ELF (cur_bfd))
2619 record_minimal_symbol (name, svalue, ms_type, ext_in->asym.sc,
2623 /* Pass 3 over files, over local syms: fill in static symbols. */
2624 for (f_idx = 0; f_idx < hdr->ifdMax; f_idx++)
2626 struct partial_symtab *save_pst;
2630 cur_fdr = fh = debug_info->fdr + f_idx;
2634 fdr_to_pst[f_idx].pst = NULL;
2638 /* Determine the start address for this object file from the
2639 file header and relocate it, except for Irix 5.2 zero fh->adr. */
2643 if (relocatable || textlow != 0)
2644 textlow += ANOFFSET (objfile->section_offsets,
2645 SECT_OFF_TEXT (objfile));
2649 pst = start_psymtab_common (objfile, objfile->section_offsets,
2652 objfile->global_psymbols.next,
2653 objfile->static_psymbols.next);
2654 pst->read_symtab_private = obstack_alloc (&objfile->objfile_obstack,
2655 sizeof (struct symloc));
2656 memset (pst->read_symtab_private, 0, sizeof (struct symloc));
2659 FDR_IDX (pst) = f_idx;
2660 CUR_BFD (pst) = cur_bfd;
2661 DEBUG_SWAP (pst) = debug_swap;
2662 DEBUG_INFO (pst) = debug_info;
2663 PENDING_LIST (pst) = pending_list;
2665 /* The way to turn this into a symtab is to call... */
2666 pst->read_symtab = mdebug_read_symtab;
2668 /* Set up language for the pst.
2669 The language from the FDR is used if it is unambigious (e.g. cfront
2670 with native cc and g++ will set the language to C).
2671 Otherwise we have to deduce the language from the filename.
2672 Native ecoff has every header file in a separate FDR, so
2673 deduce_language_from_filename will return language_unknown for
2674 a header file, which is not what we want.
2675 But the FDRs for the header files are after the FDR for the source
2676 file, so we can assign the language of the source file to the
2677 following header files. Then we save the language in the private
2678 pst data so that we can reuse it when building symtabs. */
2679 prev_language = psymtab_language;
2683 case langCplusplusV2:
2684 psymtab_language = language_cplus;
2687 psymtab_language = deduce_language_from_filename (fdr_name (fh));
2690 if (psymtab_language == language_unknown)
2691 psymtab_language = prev_language;
2692 PST_PRIVATE (pst)->pst_language = psymtab_language;
2694 pst->texthigh = pst->textlow;
2696 /* For stabs-in-ecoff files, the second symbol must be @stab.
2697 This symbol is emitted by mips-tfile to signal that the
2698 current object file uses encapsulated stabs instead of mips
2699 ecoff for local symbols. (It is the second symbol because
2700 the first symbol is the stFile used to signal the start of a
2702 processing_gcc_compilation = 0;
2705 (*swap_sym_in) (cur_bfd,
2706 ((char *) debug_info->external_sym
2707 + (fh->isymBase + 1) * external_sym_size),
2709 if (strcmp (debug_info->ss + fh->issBase + sh.iss,
2711 processing_gcc_compilation = 2;
2714 if (processing_gcc_compilation != 0)
2716 for (cur_sdx = 2; cur_sdx < fh->csym; cur_sdx++)
2719 const char *namestring;
2721 (*swap_sym_in) (cur_bfd,
2722 (((char *) debug_info->external_sym)
2723 + (fh->isymBase + cur_sdx) * external_sym_size),
2725 type_code = ECOFF_UNMARK_STAB (sh.index);
2726 if (!ECOFF_IS_STAB (&sh))
2728 if (sh.st == stProc || sh.st == stStaticProc)
2733 if (sh.st == stStaticProc)
2735 namestring = debug_info->ss + fh->issBase + sh.iss;
2736 record_minimal_symbol (namestring, sh.value,
2737 mst_file_text, sh.sc,
2740 sh.value += ANOFFSET (objfile->section_offsets,
2741 SECT_OFF_TEXT (objfile));
2742 procaddr = sh.value;
2744 isym = AUX_GET_ISYM (fh->fBigendian,
2745 (debug_info->external_aux
2748 (*swap_sym_in) (cur_bfd,
2749 ((char *) debug_info->external_sym
2750 + ((fh->isymBase + isym - 1)
2751 * external_sym_size)),
2755 CORE_ADDR high = procaddr + sh.value;
2757 /* Kludge for Irix 5.2 zero fh->adr. */
2759 && (pst->textlow == 0 || procaddr < pst->textlow))
2760 pst->textlow = procaddr;
2761 if (high > pst->texthigh)
2762 pst->texthigh = high;
2765 else if (sh.st == stStatic)
2780 namestring = debug_info->ss + fh->issBase + sh.iss;
2781 record_minimal_symbol (namestring, sh.value,
2782 mst_file_data, sh.sc,
2784 sh.value += ANOFFSET (objfile->section_offsets,
2785 SECT_OFF_DATA (objfile));
2789 /* FIXME! Shouldn't this use cases for bss,
2790 then have the default be abs? */
2791 namestring = debug_info->ss + fh->issBase + sh.iss;
2792 record_minimal_symbol (namestring, sh.value,
2793 mst_file_bss, sh.sc,
2795 sh.value += ANOFFSET (objfile->section_offsets,
2796 SECT_OFF_BSS (objfile));
2802 /* Handle stabs continuation. */
2804 char *stabstring = debug_info->ss + fh->issBase + sh.iss;
2805 int len = strlen (stabstring);
2807 while (stabstring[len - 1] == '\\')
2810 char *stabstring1 = stabstring;
2814 /* Ignore continuation char from 1st string. */
2817 /* Read next stabstring. */
2819 (*swap_sym_in) (cur_bfd,
2820 (((char *) debug_info->external_sym)
2821 + (fh->isymBase + cur_sdx)
2822 * external_sym_size),
2824 stabstring2 = debug_info->ss + fh->issBase + sh2.iss;
2825 len2 = strlen (stabstring2);
2827 /* Concatinate stabstring2 with stabstring1. */
2829 && stabstring != debug_info->ss + fh->issBase + sh.iss)
2830 stabstring = xrealloc (stabstring, len + len2 + 1);
2833 stabstring = xmalloc (len + len2 + 1);
2834 strcpy (stabstring, stabstring1);
2836 strcpy (stabstring + len, stabstring2);
2844 /* Standard, external, non-debugger, symbols. */
2846 case N_TEXT | N_EXT:
2847 case N_NBTEXT | N_EXT:
2848 sh.value += ANOFFSET (objfile->section_offsets,
2849 SECT_OFF_TEXT (objfile));
2852 case N_DATA | N_EXT:
2853 case N_NBDATA | N_EXT:
2854 sh.value += ANOFFSET (objfile->section_offsets,
2855 SECT_OFF_DATA (objfile));
2860 case N_NBBSS | N_EXT:
2861 case N_SETV | N_EXT: /* FIXME, is this in BSS? */
2862 sh.value += ANOFFSET (objfile->section_offsets,
2863 SECT_OFF_BSS (objfile));
2870 /* Standard, local, non-debugger, symbols. */
2874 /* We need to be able to deal with both N_FN or
2875 N_TEXT, because we have no way of knowing
2876 whether the sys-supplied ld or GNU ld was used
2877 to make the executable. Sequents throw in
2878 another wrinkle -- they renumbered N_FN. */
2886 sh.value += ANOFFSET (objfile->section_offsets,
2887 SECT_OFF_DATA (objfile));
2890 case N_UNDF | N_EXT:
2891 continue; /* Just undefined, not COMMON. */
2896 /* Lots of symbol types we can just ignore. */
2903 /* Keep going . . . */
2906 * Special symbol types for GNU
2909 case N_INDR | N_EXT:
2911 case N_SETA | N_EXT:
2913 case N_SETT | N_EXT:
2915 case N_SETD | N_EXT:
2917 case N_SETB | N_EXT:
2928 static int prev_so_symnum = -10;
2929 static int first_so_symnum;
2931 int prev_textlow_not_set;
2933 valu = sh.value + ANOFFSET (objfile->section_offsets,
2934 SECT_OFF_TEXT (objfile));
2936 prev_textlow_not_set = textlow_not_set;
2938 /* A zero value is probably an indication for the
2939 SunPRO 3.0 compiler. end_psymtab explicitly tests
2940 for zero, so don't relocate it. */
2943 && gdbarch_sofun_address_maybe_missing (gdbarch))
2945 textlow_not_set = 1;
2949 textlow_not_set = 0;
2951 past_first_source_file = 1;
2953 if (prev_so_symnum != symnum - 1)
2954 { /* Here if prev stab wasn't N_SO. */
2955 first_so_symnum = symnum;
2959 pst = (struct partial_symtab *) 0;
2961 dependencies_used = 0;
2965 prev_so_symnum = symnum;
2967 /* End the current partial symtab and start a
2970 /* SET_NAMESTRING ();*/
2971 namestring = stabstring;
2973 /* Null name means end of .o file. Don't start a new
2975 if (*namestring == '\000')
2978 /* Some compilers (including gcc) emit a pair of
2979 initial N_SOs. The first one is a directory name;
2980 the second the file name. If pst exists, is
2981 empty, and has a filename ending in '/', we assume
2982 the previous N_SO was a directory name. */
2983 p = lbasename (namestring);
2984 if (p != namestring && *p == '\000')
2985 continue; /* Simply ignore directory
2988 /* Some other compilers (C++ ones in particular) emit
2989 useless SOs for non-existant .c files. We ignore
2990 all subsequent SOs that immediately follow the
3003 enum language tmp_language;
3005 /* Mark down an include file in the current psymtab. */
3007 /* SET_NAMESTRING (); */
3008 namestring = stabstring;
3011 = deduce_language_from_filename (namestring);
3013 /* Only change the psymtab's language if we've
3014 learned something useful (eg. tmp_language is not
3015 language_unknown). In addition, to match what
3016 start_subfile does, never change from C++ to
3018 if (tmp_language != language_unknown
3019 && (tmp_language != language_c
3020 || psymtab_language != language_cplus))
3021 psymtab_language = tmp_language;
3023 /* In C++, one may expect the same filename to come
3024 round many times, when code is coming alternately
3025 from the main file and from inline functions in
3026 other files. So I check to see if this is a file
3027 we've seen before -- either the main source file,
3028 or a previously included file.
3030 This seems to be a lot of time to be spending on
3031 N_SOL, but things like "break c-exp.y:435" need to
3032 work (I suppose the psymtab_include_list could be
3033 hashed or put in a binary tree, if profiling shows
3034 this is a major hog). */
3035 if (pst && filename_cmp (namestring, pst->filename) == 0)
3041 for (i = 0; i < includes_used; i++)
3042 if (filename_cmp (namestring,
3043 psymtab_include_list[i]) == 0)
3052 psymtab_include_list[includes_used++] = namestring;
3053 if (includes_used >= includes_allocated)
3055 const char **orig = psymtab_include_list;
3057 psymtab_include_list = (const char **)
3058 alloca ((includes_allocated *= 2) *
3059 sizeof (const char *));
3060 memcpy (psymtab_include_list, orig,
3061 includes_used * sizeof (const char *));
3065 case N_LSYM: /* Typedef or automatic variable. */
3066 case N_STSYM: /* Data seg var -- static */
3067 case N_LCSYM: /* BSS " */
3068 case N_ROSYM: /* Read-only data seg var -- static. */
3069 case N_NBSTS: /* Gould nobase. */
3070 case N_NBLCS: /* symbols. */
3072 case N_GSYM: /* Global (extern) variable; can be
3073 data or bss (sigh FIXME). */
3075 /* Following may probably be ignored; I'll leave them here
3076 for now (until I do Pascal and Modula 2 extensions). */
3078 case N_PC: /* I may or may not need this; I
3080 case N_M2C: /* I suspect that I can ignore this
3082 case N_SCOPE: /* Same. */
3084 /* SET_NAMESTRING (); */
3085 namestring = stabstring;
3086 p = (char *) strchr (namestring, ':');
3088 continue; /* Not a debugging symbol. */
3092 /* Main processing section for debugging symbols which
3093 the initial read through the symbol tables needs to
3094 worry about. If we reach this point, the symbol
3095 which we are considering is definitely one we are
3096 interested in. p must also contain the (valid)
3097 index into the namestring which indicates the
3098 debugging type symbol. */
3103 sh.value += ANOFFSET (objfile->section_offsets,
3104 SECT_OFF_DATA (objfile));
3106 if (gdbarch_static_transform_name_p (gdbarch))
3107 namestring = gdbarch_static_transform_name
3108 (gdbarch, namestring);
3110 add_psymbol_to_list (namestring, p - namestring, 1,
3111 VAR_DOMAIN, LOC_STATIC,
3112 &objfile->static_psymbols,
3114 psymtab_language, objfile);
3117 sh.value += ANOFFSET (objfile->section_offsets,
3118 SECT_OFF_DATA (objfile));
3119 /* The addresses in these entries are reported
3120 to be wrong. See the code that reads 'G's
3122 add_psymbol_to_list (namestring, p - namestring, 1,
3123 VAR_DOMAIN, LOC_STATIC,
3124 &objfile->global_psymbols,
3126 psymtab_language, objfile);
3130 /* When a 'T' entry is defining an anonymous enum, it
3131 may have a name which is the empty string, or a
3132 single space. Since they're not really defining a
3133 symbol, those shouldn't go in the partial symbol
3134 table. We do pick up the elements of such enums at
3135 'check_enum:', below. */
3136 if (p >= namestring + 2
3137 || (p == namestring + 1
3138 && namestring[0] != ' '))
3140 add_psymbol_to_list (namestring, p - namestring, 1,
3141 STRUCT_DOMAIN, LOC_TYPEDEF,
3142 &objfile->static_psymbols,
3144 psymtab_language, objfile);
3147 /* Also a typedef with the same name. */
3148 add_psymbol_to_list (namestring,
3150 VAR_DOMAIN, LOC_TYPEDEF,
3151 &objfile->static_psymbols,
3160 if (p != namestring) /* a name is there, not
3163 add_psymbol_to_list (namestring, p - namestring, 1,
3164 VAR_DOMAIN, LOC_TYPEDEF,
3165 &objfile->static_psymbols,
3167 psymtab_language, objfile);
3170 /* If this is an enumerated type, we need to add
3171 all the enum constants to the partial symbol
3172 table. This does not cover enums without names,
3173 e.g. "enum {a, b} c;" in C, but fortunately
3174 those are rare. There is no way for GDB to find
3175 those from the enum type without spending too
3176 much time on it. Thus to solve this problem,
3177 the compiler needs to put out the enum in a
3178 nameless type. GCC2 does this. */
3180 /* We are looking for something of the form
3181 <name> ":" ("t" | "T") [<number> "="] "e"
3182 {<constant> ":" <value> ","} ";". */
3184 /* Skip over the colon and the 't' or 'T'. */
3186 /* This type may be given a number. Also, numbers
3187 can come in pairs like (0,26). Skip over it. */
3188 while ((*p >= '0' && *p <= '9')
3189 || *p == '(' || *p == ',' || *p == ')'
3195 /* The aix4 compiler emits extra crud before
3199 /* Skip over the type (?). */
3203 /* Skip over the colon. */
3207 /* We have found an enumerated type. */
3208 /* According to comments in read_enum_type
3209 a comma could end it instead of a semicolon.
3210 I don't know where that happens.
3212 while (*p && *p != ';' && *p != ',')
3216 /* Check for and handle cretinous dbx
3217 symbol name continuation! */
3218 if (*p == '\\' || (*p == '?' && p[1] == '\0'))
3219 p = next_symbol_text (objfile);
3221 /* Point to the character after the name
3222 of the enum constant. */
3223 for (q = p; *q && *q != ':'; q++)
3225 /* Note that the value doesn't matter for
3226 enum constants in psymtabs, just in
3228 add_psymbol_to_list (p, q - p, 1,
3229 VAR_DOMAIN, LOC_CONST,
3230 &objfile->static_psymbols,
3231 0, 0, psymtab_language,
3233 /* Point past the name. */
3235 /* Skip over the value. */
3236 while (*p && *p != ',')
3238 /* Advance past the comma. */
3245 /* Constant, e.g. from "const" in Pascal. */
3246 add_psymbol_to_list (namestring, p - namestring, 1,
3247 VAR_DOMAIN, LOC_CONST,
3248 &objfile->static_psymbols,
3249 sh.value, 0, psymtab_language,
3256 int name_len = p - namestring;
3257 char *name = xmalloc (name_len + 1);
3259 memcpy (name, namestring, name_len);
3260 name[name_len] = '\0';
3261 function_outside_compilation_unit_complaint (name);
3264 sh.value += ANOFFSET (objfile->section_offsets,
3265 SECT_OFF_TEXT (objfile));
3266 add_psymbol_to_list (namestring, p - namestring, 1,
3267 VAR_DOMAIN, LOC_BLOCK,
3268 &objfile->static_psymbols,
3270 psymtab_language, objfile);
3273 /* Global functions were ignored here, but now they
3274 are put into the global psymtab like one would
3275 expect. They're also in the minimal symbol
3280 int name_len = p - namestring;
3281 char *name = xmalloc (name_len + 1);
3283 memcpy (name, namestring, name_len);
3284 name[name_len] = '\0';
3285 function_outside_compilation_unit_complaint (name);
3288 sh.value += ANOFFSET (objfile->section_offsets,
3289 SECT_OFF_TEXT (objfile));
3290 add_psymbol_to_list (namestring, p - namestring, 1,
3291 VAR_DOMAIN, LOC_BLOCK,
3292 &objfile->global_psymbols,
3294 psymtab_language, objfile);
3297 /* Two things show up here (hopefully); static
3298 symbols of local scope (static used inside
3299 braces) or extensions of structure symbols. We
3314 case '#': /* For symbol identification (used
3319 /* It is a C++ nested symbol. We don't need to
3320 record it (I don't think); if we try to look up
3321 foo::bar::baz, then symbols for the symtab
3322 containing foo should get read in, I think. */
3323 /* Someone says sun cc puts out symbols like
3324 /foo/baz/maclib::/usr/local/bin/maclib,
3325 which would get here with a symbol type of ':'. */
3329 /* Unexpected symbol descriptor. The second and
3330 subsequent stabs of a continued stab can show up
3331 here. The question is whether they ever can
3332 mimic a normal stab--it would be nice if not,
3333 since we certainly don't want to spend the time
3334 searching to the end of every string looking for
3337 complaint (&symfile_complaints,
3338 _("unknown symbol descriptor `%c'"), p[1]);
3340 /* Ignore it; perhaps it is an extension that we don't
3349 /* Solaris 2 end of module, finish current partial
3350 symbol table. END_PSYMTAB will set
3351 pst->texthigh to the proper value, which is
3352 necessary if a module compiled without
3353 debugging info follows this module. */
3355 && gdbarch_sofun_address_maybe_missing (gdbarch))
3357 pst = (struct partial_symtab *) 0;
3359 dependencies_used = 0;
3364 if (sh.value > save_pst->texthigh)
3365 save_pst->texthigh = sh.value;
3370 case N_SSYM: /* Claim: Structure or union
3371 element. Hopefully, I can
3373 case N_ENTRY: /* Alternate entry point; can
3375 case N_MAIN: /* Can definitely ignore this. */
3376 case N_CATCH: /* These are GNU C++ extensions. */
3377 case N_EHDECL: /* that can safely be ignored here. */
3387 case N_NSYMS: /* Ultrix 4.0: symbol count */
3388 case N_DEFD: /* GNU Modula-2 */
3389 case N_ALIAS: /* SunPro F77: alias name, ignore
3392 case N_OBJ: /* Useless types from Solaris. */
3394 /* These symbols aren't interesting; don't worry about
3400 /* If we haven't found it yet, ignore it. It's
3401 probably some new type we don't know about yet. */
3402 complaint (&symfile_complaints,
3403 _("unknown symbol type %s"),
3404 hex_string (type_code)); /* CUR_SYMBOL_TYPE */
3408 && stabstring != debug_info->ss + fh->issBase + sh.iss)
3411 /* end - Handle continuation */
3416 for (cur_sdx = 0; cur_sdx < fh->csym;)
3419 enum address_class class;
3420 CORE_ADDR minsym_value;
3422 (*swap_sym_in) (cur_bfd,
3423 ((char *) debug_info->external_sym
3424 + ((fh->isymBase + cur_sdx)
3425 * external_sym_size)),
3428 if (ECOFF_IS_STAB (&sh))
3434 /* Non absolute static symbols go into the minimal table. */
3435 if (SC_IS_UNDEF (sh.sc) || sh.sc == scNil
3436 || (sh.index == indexNil
3437 && (sh.st != stStatic || sh.sc == scAbs)))
3439 /* FIXME, premature? */
3444 name = debug_info->ss + fh->issBase + sh.iss;
3446 minsym_value = sh.value;
3452 /* The value of a stEnd symbol is the displacement from the
3453 corresponding start symbol value, do not relocate it. */
3455 sh.value += ANOFFSET (objfile->section_offsets,
3456 SECT_OFF_TEXT (objfile));
3463 sh.value += ANOFFSET (objfile->section_offsets,
3464 SECT_OFF_DATA (objfile));
3468 sh.value += ANOFFSET (objfile->section_offsets,
3469 SECT_OFF_BSS (objfile));
3480 prim_record_minimal_symbol_and_info (name, minsym_value,
3482 SECT_OFF_TEXT (objfile),
3488 /* Ignore all parameter symbol records. */
3489 if (sh.index >= hdr->iauxMax)
3491 /* Should not happen, but does when cross-compiling
3492 with the MIPS compiler. FIXME -- pull later. */
3493 index_complaint (name);
3494 new_sdx = cur_sdx + 1; /* Don't skip at all. */
3497 new_sdx = AUX_GET_ISYM (fh->fBigendian,
3498 (debug_info->external_aux
3502 if (new_sdx <= cur_sdx)
3504 /* This should not happen either... FIXME. */
3505 complaint (&symfile_complaints,
3506 _("bad proc end in aux found from symbol %s"),
3508 new_sdx = cur_sdx + 1; /* Don't skip backward. */
3511 /* For stProc symbol records, we need to check the
3512 storage class as well, as only (stProc, scText)
3513 entries represent "real" procedures - See the
3514 Compaq document titled "Object File / Symbol Table
3515 Format Specification" for more information. If the
3516 storage class is not scText, we discard the whole
3517 block of symbol records for this stProc. */
3518 if (sh.st == stProc && sh.sc != scText)
3521 /* Usually there is a local and a global stProc symbol
3522 for a function. This means that the function name
3523 has already been entered into the mimimal symbol table
3524 while processing the global symbols in pass 2 above.
3525 One notable exception is the PROGRAM name from
3526 f77 compiled executables, it is only put out as
3527 local stProc symbol, and a global MAIN__ stProc symbol
3528 points to it. It doesn't matter though, as gdb is
3529 still able to find the PROGRAM name via the partial
3530 symbol table, and the MAIN__ symbol via the minimal
3532 if (sh.st == stProc)
3533 add_psymbol_to_list (name, strlen (name), 1,
3534 VAR_DOMAIN, LOC_BLOCK,
3535 &objfile->global_psymbols,
3536 0, sh.value, psymtab_language, objfile);
3538 add_psymbol_to_list (name, strlen (name), 1,
3539 VAR_DOMAIN, LOC_BLOCK,
3540 &objfile->static_psymbols,
3541 0, sh.value, psymtab_language, objfile);
3543 procaddr = sh.value;
3546 (*swap_sym_in) (cur_bfd,
3547 ((char *) debug_info->external_sym
3548 + ((fh->isymBase + cur_sdx - 1)
3549 * external_sym_size)),
3554 /* Kludge for Irix 5.2 zero fh->adr. */
3556 && (pst->textlow == 0 || procaddr < pst->textlow))
3557 pst->textlow = procaddr;
3559 high = procaddr + sh.value;
3560 if (high > pst->texthigh)
3561 pst->texthigh = high;
3564 case stStatic: /* Variable */
3565 if (SC_IS_DATA (sh.sc))
3566 prim_record_minimal_symbol_and_info (name, minsym_value,
3568 SECT_OFF_DATA (objfile),
3571 prim_record_minimal_symbol_and_info (name, minsym_value,
3573 SECT_OFF_BSS (objfile),
3578 case stIndirect: /* Irix5 forward declaration */
3579 /* Skip forward declarations from Irix5 cc. */
3582 case stTypedef: /* Typedef */
3583 /* Skip typedefs for forward declarations and opaque
3584 structs from alpha and mips cc. */
3585 if (sh.iss == 0 || has_opaque_xref (fh, &sh))
3587 class = LOC_TYPEDEF;
3590 case stConstant: /* Constant decl */
3597 case stBlock: /* { }, str, un, enum */
3598 /* Do not create a partial symbol for cc unnamed aggregates
3599 and gcc empty aggregates. */
3600 if ((sh.sc == scInfo
3601 || SC_IS_COMMON (sh.sc))
3603 && sh.index != cur_sdx + 2)
3605 add_psymbol_to_list (name, strlen (name), 1,
3606 STRUCT_DOMAIN, LOC_TYPEDEF,
3607 &objfile->static_psymbols,
3609 psymtab_language, objfile);
3611 handle_psymbol_enumerators (objfile, fh, sh.st, sh.value);
3613 /* Skip over the block. */
3615 if (new_sdx <= cur_sdx)
3617 /* This happens with the Ultrix kernel. */
3618 complaint (&symfile_complaints,
3619 _("bad aux index at block symbol %s"), name);
3620 new_sdx = cur_sdx + 1; /* Don't skip backward. */
3625 case stFile: /* File headers */
3626 case stLabel: /* Labels */
3627 case stEnd: /* Ends of files */
3630 case stLocal: /* Local variables */
3631 /* Normally these are skipped because we skip over
3632 all blocks we see. However, these can occur
3633 as visible symbols in a .h file that contains code. */
3637 /* Both complaints are valid: one gives symbol name,
3638 the other the offending symbol type. */
3639 complaint (&symfile_complaints, _("unknown local symbol %s"),
3641 complaint (&symfile_complaints, _("with type %d"), sh.st);
3645 /* Use this gdb symbol. */
3646 add_psymbol_to_list (name, strlen (name), 1,
3648 &objfile->static_psymbols,
3649 0, sh.value, psymtab_language, objfile);
3651 cur_sdx++; /* Go to next file symbol. */
3654 /* Now do enter the external symbols. */
3655 ext_ptr = &extern_tab[fdr_to_pst[f_idx].globals_offset];
3656 cur_sdx = fdr_to_pst[f_idx].n_globals;
3657 PST_PRIVATE (save_pst)->extern_count = cur_sdx;
3658 PST_PRIVATE (save_pst)->extern_tab = ext_ptr;
3659 for (; --cur_sdx >= 0; ext_ptr++)
3661 enum address_class class;
3666 if (ext_ptr->ifd != f_idx)
3667 internal_error (__FILE__, __LINE__,
3668 _("failed internal consistency check"));
3669 psh = &ext_ptr->asym;
3671 /* Do not add undefined symbols to the partial symbol table. */
3672 if (SC_IS_UNDEF (psh->sc) || psh->sc == scNil)
3675 svalue = psh->value;
3680 svalue += ANOFFSET (objfile->section_offsets,
3681 SECT_OFF_TEXT (objfile));
3688 svalue += ANOFFSET (objfile->section_offsets,
3689 SECT_OFF_DATA (objfile));
3693 svalue += ANOFFSET (objfile->section_offsets,
3694 SECT_OFF_BSS (objfile));
3701 /* These are generated for static symbols in .o files,
3706 /* External procedure symbols have been entered
3707 into the minimal symbol table in pass 2 above.
3708 Ignore them, as parse_external will ignore them too. */
3714 unknown_ext_complaint (debug_info->ssext + psh->iss);
3715 /* Fall through, pretend it's global. */
3717 /* Global common symbols are resolved by the runtime loader,
3719 if (SC_IS_COMMON (psh->sc))
3725 name = debug_info->ssext + psh->iss;
3726 add_psymbol_to_list (name, strlen (name), 1,
3728 &objfile->global_psymbols,
3730 psymtab_language, objfile);
3734 /* Link pst to FDR. end_psymtab returns NULL if the psymtab was
3735 empty and put on the free list. */
3736 fdr_to_pst[f_idx].pst = end_psymtab (objfile, save_pst,
3737 psymtab_include_list, includes_used,
3738 -1, save_pst->texthigh,
3739 dependency_list, dependencies_used, textlow_not_set);
3741 dependencies_used = 0;
3743 /* The objfile has its functions reordered if this partial symbol
3744 table overlaps any other partial symbol table.
3745 We cannot assume a reordered objfile if a partial symbol table
3746 is contained within another partial symbol table, as partial symbol
3747 tables for include files with executable code are contained
3748 within the partial symbol table for the including source file,
3749 and we do not want to flag the objfile reordered for these cases.
3751 This strategy works well for Irix-5.2 shared libraries, but we
3752 might have to use a more elaborate (and slower) algorithm for
3754 save_pst = fdr_to_pst[f_idx].pst;
3755 if (save_pst != NULL
3756 && save_pst->textlow != 0
3757 && !(objfile->flags & OBJF_REORDERED))
3759 ALL_OBJFILE_PSYMTABS (objfile, pst)
3762 && save_pst->textlow >= pst->textlow
3763 && save_pst->textlow < pst->texthigh
3764 && save_pst->texthigh > pst->texthigh)
3766 objfile->flags |= OBJF_REORDERED;
3773 /* Now scan the FDRs for dependencies. */
3774 for (f_idx = 0; f_idx < hdr->ifdMax; f_idx++)
3776 fh = f_idx + debug_info->fdr;
3777 pst = fdr_to_pst[f_idx].pst;
3779 if (pst == (struct partial_symtab *) NULL)
3782 /* This should catch stabs-in-ecoff. */
3786 /* Skip the first file indirect entry as it is a self dependency for
3787 source files or a reverse .h -> .c dependency for header files. */
3788 pst->number_of_dependencies = 0;
3790 ((struct partial_symtab **)
3791 obstack_alloc (&objfile->objfile_obstack,
3793 * sizeof (struct partial_symtab *))));
3794 for (s_idx = 1; s_idx < fh->crfd; s_idx++)
3798 (*swap_rfd_in) (cur_bfd,
3799 ((char *) debug_info->external_rfd
3800 + (fh->rfdBase + s_idx) * external_rfd_size),
3802 if (rh < 0 || rh >= hdr->ifdMax)
3804 complaint (&symfile_complaints, _("bad file number %ld"), rh);
3808 /* Skip self dependencies of header files. */
3812 /* Do not add to dependeny list if psymtab was empty. */
3813 if (fdr_to_pst[rh].pst == (struct partial_symtab *) NULL)
3815 pst->dependencies[pst->number_of_dependencies++]
3816 = fdr_to_pst[rh].pst;
3820 /* Remove the dummy psymtab created for -O3 images above, if it is
3821 still empty, to enable the detection of stripped executables. */
3822 if (objfile->psymtabs->next == NULL
3823 && objfile->psymtabs->number_of_dependencies == 0
3824 && objfile->psymtabs->n_global_syms == 0
3825 && objfile->psymtabs->n_static_syms == 0)
3826 objfile->psymtabs = NULL;
3827 do_cleanups (old_chain);
3830 /* If the current psymbol has an enumerated type, we need to add
3831 all the enum constants to the partial symbol table. */
3834 handle_psymbol_enumerators (struct objfile *objfile, FDR *fh, int stype,
3837 const bfd_size_type external_sym_size = debug_swap->external_sym_size;
3838 void (*const swap_sym_in) (bfd *, void *, SYMR *) = debug_swap->swap_sym_in;
3839 char *ext_sym = ((char *) debug_info->external_sym
3840 + ((fh->isymBase + cur_sdx + 1) * external_sym_size));
3850 /* It is an enumerated type if the next symbol entry is a stMember
3851 and its auxiliary index is indexNil or its auxiliary entry
3852 is a plain btNil or btVoid.
3853 Alpha cc -migrate enums are recognized by a zero index and
3854 a zero symbol value.
3855 DU 4.0 cc enums are recognized by a member type of btEnum without
3856 qualifiers and a zero symbol value. */
3857 (*swap_sym_in) (cur_bfd, ext_sym, &sh);
3858 if (sh.st != stMember)
3861 if (sh.index == indexNil
3862 || (sh.index == 0 && svalue == 0))
3864 (*debug_swap->swap_tir_in) (fh->fBigendian,
3865 &(debug_info->external_aux
3866 + fh->iauxBase + sh.index)->a_ti,
3868 if ((tir.bt != btNil
3870 && (tir.bt != btEnum || svalue != 0))
3871 || tir.tq0 != tqNil)
3883 (*swap_sym_in) (cur_bfd, ext_sym, &sh);
3884 if (sh.st != stMember)
3886 name = debug_info->ss + cur_fdr->issBase + sh.iss;
3888 /* Note that the value doesn't matter for enum constants
3889 in psymtabs, just in symtabs. */
3890 add_psymbol_to_list (name, strlen (name), 1,
3891 VAR_DOMAIN, LOC_CONST,
3892 &objfile->static_psymbols, 0,
3893 (CORE_ADDR) 0, psymtab_language, objfile);
3894 ext_sym += external_sym_size;
3898 /* Get the next symbol. OBJFILE is unused. */
3901 mdebug_next_symbol_text (struct objfile *objfile)
3906 (*debug_swap->swap_sym_in) (cur_bfd,
3907 ((char *) debug_info->external_sym
3908 + ((cur_fdr->isymBase + cur_sdx)
3909 * debug_swap->external_sym_size)),
3911 return debug_info->ss + cur_fdr->issBase + sh.iss;
3914 /* Ancillary function to psymtab_to_symtab(). Does all the work
3915 for turning the partial symtab PST into a symtab, recurring
3916 first on all dependent psymtabs. The argument FILENAME is
3917 only passed so we can see in debug stack traces what file
3920 This function has a split personality, based on whether the
3921 symbol table contains ordinary ecoff symbols, or stabs-in-ecoff.
3922 The flow of control and even the memory allocation differs. FIXME. */
3925 psymtab_to_symtab_1 (struct objfile *objfile,
3926 struct partial_symtab *pst, const char *filename)
3928 bfd_size_type external_sym_size;
3929 bfd_size_type external_pdr_size;
3930 void (*swap_sym_in) (bfd *, void *, SYMR *);
3931 void (*swap_pdr_in) (bfd *, void *, PDR *);
3933 struct compunit_symtab *cust = NULL;
3935 struct linetable *lines;
3936 CORE_ADDR lowest_pdr_addr = 0;
3937 int last_symtab_ended = 0;
3943 /* Read in all partial symbtabs on which this one is dependent.
3944 NOTE that we do have circular dependencies, sigh. We solved
3945 that by setting pst->readin before this point. */
3947 for (i = 0; i < pst->number_of_dependencies; i++)
3948 if (!pst->dependencies[i]->readin)
3950 /* Inform about additional files to be read in. */
3953 fputs_filtered (" ", gdb_stdout);
3955 fputs_filtered ("and ", gdb_stdout);
3957 printf_filtered ("%s...",
3958 pst->dependencies[i]->filename);
3959 wrap_here (""); /* Flush output */
3960 gdb_flush (gdb_stdout);
3962 /* We only pass the filename for debug purposes. */
3963 psymtab_to_symtab_1 (objfile, pst->dependencies[i],
3964 pst->dependencies[i]->filename);
3967 /* Do nothing if this is a dummy psymtab. */
3969 if (pst->n_global_syms == 0 && pst->n_static_syms == 0
3970 && pst->textlow == 0 && pst->texthigh == 0)
3973 /* Now read the symbols for this symtab. */
3975 cur_bfd = CUR_BFD (pst);
3976 debug_swap = DEBUG_SWAP (pst);
3977 debug_info = DEBUG_INFO (pst);
3978 pending_list = PENDING_LIST (pst);
3979 external_sym_size = debug_swap->external_sym_size;
3980 external_pdr_size = debug_swap->external_pdr_size;
3981 swap_sym_in = debug_swap->swap_sym_in;
3982 swap_pdr_in = debug_swap->swap_pdr_in;
3983 mdebugread_objfile = objfile;
3984 cur_fd = FDR_IDX (pst);
3985 fh = ((cur_fd == -1)
3987 : debug_info->fdr + cur_fd);
3990 /* See comment in parse_partial_symbols about the @stabs sentinel. */
3991 processing_gcc_compilation = 0;
3992 if (fh != (FDR *) NULL && fh->csym >= 2)
3996 (*swap_sym_in) (cur_bfd,
3997 ((char *) debug_info->external_sym
3998 + (fh->isymBase + 1) * external_sym_size),
4000 if (strcmp (debug_info->ss + fh->issBase + sh.iss,
4003 /* We indicate that this is a GCC compilation so that certain
4004 features will be enabled in stabsread/dbxread. */
4005 processing_gcc_compilation = 2;
4009 if (processing_gcc_compilation != 0)
4011 struct gdbarch *gdbarch = get_objfile_arch (objfile);
4013 /* This symbol table contains stabs-in-ecoff entries. */
4015 /* Parse local symbols first. */
4017 if (fh->csym <= 2) /* FIXME, this blows psymtab->symtab ptr. */
4019 mdebugread_objfile = NULL;
4022 for (cur_sdx = 2; cur_sdx < fh->csym; cur_sdx++)
4028 (*swap_sym_in) (cur_bfd,
4029 (((char *) debug_info->external_sym)
4030 + (fh->isymBase + cur_sdx) * external_sym_size),
4032 name = debug_info->ss + fh->issBase + sh.iss;
4034 /* XXX This is a hack. It will go away! */
4035 if (ECOFF_IS_STAB (&sh) || (name[0] == '#'))
4037 int type_code = ECOFF_UNMARK_STAB (sh.index);
4039 /* We should never get non N_STAB symbols here, but they
4040 should be harmless, so keep process_one_symbol from
4041 complaining about them. */
4042 if (type_code & N_STAB)
4044 /* If we found a trailing N_SO with no name, process
4045 it here instead of in process_one_symbol, so we
4046 can keep a handle to its symtab. The symtab
4047 would otherwise be ended twice, once in
4048 process_one_symbol, and once after this loop. */
4049 if (type_code == N_SO
4050 && get_last_source_file ()
4051 && previous_stab_code != (unsigned char) N_SO
4054 valu += ANOFFSET (pst->section_offsets,
4055 SECT_OFF_TEXT (objfile));
4056 previous_stab_code = N_SO;
4057 cust = end_symtab (valu, 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 cust = end_symtab (pst->texthigh, SECT_OFF_TEXT (objfile));
4125 /* There used to be a call to sort_blocks here, but this should not
4126 be necessary for stabs symtabs. And as sort_blocks modifies the
4127 start address of the GLOBAL_BLOCK to the FIRST_LOCAL_BLOCK,
4128 it did the wrong thing if the first procedure in a file was
4129 generated via asm statements. */
4131 /* Fill in procedure info next. */
4135 struct cleanup *old_chain;
4141 pr_block = (PDR *) xmalloc (fh->cpd * sizeof (PDR));
4142 old_chain = make_cleanup (xfree, pr_block);
4144 pdr_ptr = ((char *) debug_info->external_pdr
4145 + fh->ipdFirst * external_pdr_size);
4146 pdr_end = pdr_ptr + fh->cpd * external_pdr_size;
4150 pdr_ptr += external_pdr_size, pdr_in++)
4152 (*swap_pdr_in) (cur_bfd, pdr_ptr, pdr_in);
4154 /* Determine lowest PDR address, the PDRs are not always
4156 if (pdr_in == pr_block)
4157 lowest_pdr_addr = pdr_in->adr;
4158 else if (pdr_in->adr < lowest_pdr_addr)
4159 lowest_pdr_addr = pdr_in->adr;
4163 pdr_in_end = pdr_in + fh->cpd;
4164 for (; pdr_in < pdr_in_end; pdr_in++)
4165 parse_procedure (pdr_in, cust, pst);
4167 do_cleanups (old_chain);
4172 /* This symbol table contains ordinary ecoff entries. */
4180 cust = new_symtab ("unknown", 0, objfile);
4184 maxlines = 2 * fh->cline;
4185 cust = new_symtab (pst->filename, maxlines, objfile);
4187 /* The proper language was already determined when building
4188 the psymtab, use it. */
4189 COMPUNIT_FILETABS (cust)->language = PST_PRIVATE (pst)->pst_language;
4192 psymtab_language = COMPUNIT_FILETABS (cust)->language;
4194 lines = SYMTAB_LINETABLE (COMPUNIT_FILETABS (cust));
4196 /* Get a new lexical context. */
4198 push_parse_stack ();
4199 top_stack->cur_st = COMPUNIT_FILETABS (cust);
4200 top_stack->cur_block
4201 = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust), STATIC_BLOCK);
4202 BLOCK_START (top_stack->cur_block) = pst->textlow;
4203 BLOCK_END (top_stack->cur_block) = 0;
4204 top_stack->blocktype = stFile;
4205 top_stack->cur_type = 0;
4206 top_stack->procadr = 0;
4207 top_stack->numargs = 0;
4208 found_ecoff_debugging_info = 0;
4215 /* Parse local symbols first. */
4216 sym_ptr = ((char *) debug_info->external_sym
4217 + fh->isymBase * external_sym_size);
4218 sym_end = sym_ptr + fh->csym * external_sym_size;
4219 while (sym_ptr < sym_end)
4224 (*swap_sym_in) (cur_bfd, sym_ptr, &sh);
4225 c = parse_symbol (&sh,
4226 debug_info->external_aux + fh->iauxBase,
4227 sym_ptr, fh->fBigendian,
4228 pst->section_offsets, objfile);
4229 sym_ptr += c * external_sym_size;
4232 /* Linenumbers. At the end, check if we can save memory.
4233 parse_lines has to look ahead an arbitrary number of PDR
4234 structures, so we swap them all first. */
4238 struct cleanup *old_chain;
4244 pr_block = (PDR *) xmalloc (fh->cpd * sizeof (PDR));
4246 old_chain = make_cleanup (xfree, pr_block);
4248 pdr_ptr = ((char *) debug_info->external_pdr
4249 + fh->ipdFirst * external_pdr_size);
4250 pdr_end = pdr_ptr + fh->cpd * external_pdr_size;
4254 pdr_ptr += external_pdr_size, pdr_in++)
4256 (*swap_pdr_in) (cur_bfd, pdr_ptr, pdr_in);
4258 /* Determine lowest PDR address, the PDRs are not always
4260 if (pdr_in == pr_block)
4261 lowest_pdr_addr = pdr_in->adr;
4262 else if (pdr_in->adr < lowest_pdr_addr)
4263 lowest_pdr_addr = pdr_in->adr;
4266 parse_lines (fh, pr_block, lines, maxlines,
4267 pst, lowest_pdr_addr);
4268 if (lines->nitems < fh->cline)
4269 lines = shrink_linetable (lines);
4271 /* Fill in procedure info next. */
4273 pdr_in_end = pdr_in + fh->cpd;
4274 for (; pdr_in < pdr_in_end; pdr_in++)
4275 parse_procedure (pdr_in, NULL, pst);
4277 do_cleanups (old_chain);
4281 size = lines->nitems;
4284 SYMTAB_LINETABLE (COMPUNIT_FILETABS (cust))
4285 = 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 = COMPUNIT_FILETABS (cust);
4295 top_stack->cur_block
4296 = BLOCKVECTOR_BLOCK (SYMTAB_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
4312 (COMPUNIT_FILETABS (cust)),
4314 printf_filtered ("\n\t%4d variables\n\t%4d "
4315 "procedures\n\t%4d labels\n",
4316 n_undef_vars, n_undef_procs, n_undef_labels);
4317 n_undef_symbols = n_undef_labels = n_undef_vars = n_undef_procs = 0;
4322 sort_blocks (COMPUNIT_FILETABS (cust));
4325 /* Now link the psymtab and the symtab. */
4326 pst->compunit_symtab = cust;
4328 mdebugread_objfile = NULL;
4331 /* Ancillary parsing procedures. */
4333 /* Return 1 if the symbol pointed to by SH has a cross reference
4334 to an opaque aggregate type, else 0. */
4337 has_opaque_xref (FDR *fh, SYMR *sh)
4344 if (sh->index == indexNil)
4347 ax = debug_info->external_aux + fh->iauxBase + sh->index;
4348 (*debug_swap->swap_tir_in) (fh->fBigendian, &ax->a_ti, &tir);
4349 if (tir.bt != btStruct && tir.bt != btUnion && tir.bt != btEnum)
4353 (*debug_swap->swap_rndx_in) (fh->fBigendian, &ax->a_rndx, rn);
4354 if (rn->rfd == 0xfff)
4355 rf = AUX_GET_ISYM (fh->fBigendian, ax + 1);
4363 /* Lookup the type at relative index RN. Return it in TPP
4364 if found and in any event come up with its name PNAME.
4365 BIGEND says whether aux symbols are big-endian or not (from fh->fBigendian).
4366 Return value says how many aux symbols we ate. */
4369 cross_ref (int fd, union aux_ext *ax, struct type **tpp,
4370 enum type_code type_code,
4371 /* Use to alloc new type if none is found. */
4372 char **pname, int bigend, char *sym_name)
4381 struct mdebug_pending *pend;
4383 *tpp = (struct type *) NULL;
4385 (*debug_swap->swap_rndx_in) (bigend, &ax->a_rndx, rn);
4387 /* Escape index means 'the next one'. */
4388 if (rn->rfd == 0xfff)
4391 rf = AUX_GET_ISYM (bigend, ax + 1);
4398 /* mips cc uses a rf of -1 for opaque struct definitions.
4399 Set TYPE_FLAG_STUB for these types so that check_typedef will
4400 resolve them if the struct gets defined in another compilation unit. */
4403 *pname = "<undefined>";
4404 *tpp = init_type (type_code, 0, TYPE_FLAG_STUB,
4405 (char *) NULL, mdebugread_objfile);
4409 /* mips cc uses an escaped rn->index of 0 for struct return types
4410 of procedures that were compiled without -g. These will always remain
4412 if (rn->rfd == 0xfff && rn->index == 0)
4414 *pname = "<undefined>";
4418 /* Find the relative file descriptor and the symbol in it. */
4419 fh = get_rfd (fd, rf);
4420 xref_fd = fh - debug_info->fdr;
4422 if (rn->index >= fh->csym)
4424 /* File indirect entry is corrupt. */
4425 *pname = "<illegal>";
4426 bad_rfd_entry_complaint (sym_name, xref_fd, rn->index);
4430 /* If we have processed this symbol then we left a forwarding
4431 pointer to the type in the pending list. If not, we`ll put
4432 it in a list of pending types, to be processed later when
4433 the file will be. In any event, we collect the name for the
4436 esh = ((char *) debug_info->external_sym
4437 + ((fh->isymBase + rn->index)
4438 * debug_swap->external_sym_size));
4439 (*debug_swap->swap_sym_in) (cur_bfd, esh, &sh);
4441 /* Make sure that this type of cross reference can be handled. */
4442 if ((sh.sc != scInfo
4443 || (sh.st != stBlock && sh.st != stTypedef && sh.st != stIndirect
4444 && sh.st != stStruct && sh.st != stUnion
4445 && sh.st != stEnum))
4446 && (sh.st != stBlock || !SC_IS_COMMON (sh.sc)))
4448 /* File indirect entry is corrupt. */
4449 *pname = "<illegal>";
4450 bad_rfd_entry_complaint (sym_name, xref_fd, rn->index);
4454 *pname = debug_info->ss + fh->issBase + sh.iss;
4456 pend = is_pending_symbol (fh, esh);
4461 /* We have not yet seen this type. */
4463 if ((sh.iss == 0 && sh.st == stTypedef) || sh.st == stIndirect)
4467 /* alpha cc puts out a stTypedef with a sh.iss of zero for
4469 a) forward declarations of structs/unions/enums which are not
4470 defined in this compilation unit.
4471 For these the type will be void. This is a bad design decision
4472 as cross referencing across compilation units is impossible
4473 due to the missing name.
4474 b) forward declarations of structs/unions/enums/typedefs which
4475 are defined later in this file or in another file in the same
4476 compilation unit. Irix5 cc uses a stIndirect symbol for this.
4477 Simply cross reference those again to get the true type.
4478 The forward references are not entered in the pending list and
4479 in the symbol table. */
4481 (*debug_swap->swap_tir_in) (bigend,
4482 &(debug_info->external_aux
4483 + fh->iauxBase + sh.index)->a_ti,
4485 if (tir.tq0 != tqNil)
4486 complaint (&symfile_complaints,
4487 _("illegal tq0 in forward typedef for %s"), sym_name);
4491 *tpp = init_type (type_code, 0, 0, (char *) NULL,
4492 mdebugread_objfile);
4493 *pname = "<undefined>";
4500 (debug_info->external_aux
4501 + fh->iauxBase + sh.index + 1),
4502 tpp, type_code, pname,
4503 fh->fBigendian, sym_name);
4507 /* Follow a forward typedef. This might recursively
4508 call cross_ref till we get a non typedef'ed type.
4509 FIXME: This is not correct behaviour, but gdb currently
4510 cannot handle typedefs without type copying. Type
4511 copying is impossible as we might have mutual forward
4512 references between two files and the copied type would not
4513 get filled in when we later parse its definition. */
4514 *tpp = parse_type (xref_fd,
4515 debug_info->external_aux + fh->iauxBase,
4519 debug_info->ss + fh->issBase + sh.iss);
4520 add_pending (fh, esh, *tpp);
4524 complaint (&symfile_complaints,
4525 _("illegal bt %d in forward typedef for %s"), tir.bt,
4527 *tpp = init_type (type_code, 0, 0, (char *) NULL,
4528 mdebugread_objfile);
4533 else if (sh.st == stTypedef)
4535 /* Parse the type for a normal typedef. This might recursively call
4536 cross_ref till we get a non typedef'ed type.
4537 FIXME: This is not correct behaviour, but gdb currently
4538 cannot handle typedefs without type copying. But type copying is
4539 impossible as we might have mutual forward references between
4540 two files and the copied type would not get filled in when
4541 we later parse its definition. */
4542 *tpp = parse_type (xref_fd,
4543 debug_info->external_aux + fh->iauxBase,
4547 debug_info->ss + fh->issBase + sh.iss);
4551 /* Cross reference to a struct/union/enum which is defined
4552 in another file in the same compilation unit but that file
4553 has not been parsed yet.
4554 Initialize the type only, it will be filled in when
4555 it's definition is parsed. */
4556 *tpp = init_type (type_code, 0, 0, (char *) NULL, mdebugread_objfile);
4558 add_pending (fh, esh, *tpp);
4561 /* We used one auxent normally, two if we got a "next one" rf. */
4566 /* Quick&dirty lookup procedure, to avoid the MI ones that require
4567 keeping the symtab sorted. */
4569 static struct symbol *
4570 mylookup_symbol (char *name, const struct block *block,
4571 domain_enum domain, enum address_class class)
4573 struct block_iterator iter;
4578 ALL_BLOCK_SYMBOLS (block, iter, sym)
4580 if (SYMBOL_LINKAGE_NAME (sym)[0] == inc
4581 && SYMBOL_DOMAIN (sym) == domain
4582 && SYMBOL_CLASS (sym) == class
4583 && strcmp (SYMBOL_LINKAGE_NAME (sym), name) == 0)
4587 block = BLOCK_SUPERBLOCK (block);
4589 return mylookup_symbol (name, block, domain, class);
4594 /* Add a new symbol S to a block B. */
4597 add_symbol (struct symbol *s, struct symtab *symtab, struct block *b)
4599 SYMBOL_SYMTAB (s) = symtab;
4600 dict_add_symbol (BLOCK_DICT (b), s);
4603 /* Add a new block B to a symtab S. */
4606 add_block (struct block *b, struct symtab *s)
4608 /* Cast away "const", but that's ok because we're building the
4609 symtab and blockvector here. */
4610 struct blockvector *bv = (struct blockvector *) SYMTAB_BLOCKVECTOR (s);
4612 bv = (struct blockvector *) xrealloc ((void *) bv,
4613 (sizeof (struct blockvector)
4614 + BLOCKVECTOR_NBLOCKS (bv)
4615 * sizeof (bv->block)));
4616 if (bv != SYMTAB_BLOCKVECTOR (s))
4617 SYMTAB_BLOCKVECTOR (s) = bv;
4619 BLOCKVECTOR_BLOCK (bv, BLOCKVECTOR_NBLOCKS (bv)++) = b;
4622 /* Add a new linenumber entry (LINENO,ADR) to a linevector LT.
4623 MIPS' linenumber encoding might need more than one byte
4624 to describe it, LAST is used to detect these continuation lines.
4626 Combining lines with the same line number seems like a bad idea.
4627 E.g: There could be a line number entry with the same line number after the
4628 prologue and GDB should not ignore it (this is a better way to find
4629 a prologue than mips_skip_prologue).
4630 But due to the compressed line table format there are line number entries
4631 for the same line which are needed to bridge the gap to the next
4632 line number entry. These entries have a bogus address info with them
4633 and we are unable to tell them from intended duplicate line number
4635 This is another reason why -ggdb debugging format is preferable. */
4638 add_line (struct linetable *lt, int lineno, CORE_ADDR adr, int last)
4640 /* DEC c89 sometimes produces zero linenos which confuse gdb.
4641 Change them to something sensible. */
4645 last = -2; /* Make sure we record first line. */
4647 if (last == lineno) /* Skip continuation lines. */
4650 lt->item[lt->nitems].line = lineno;
4651 lt->item[lt->nitems++].pc = adr << 2;
4655 /* Sorting and reordering procedures. */
4657 /* Blocks with a smaller low bound should come first. */
4660 compare_blocks (const void *arg1, const void *arg2)
4663 struct block **b1 = (struct block **) arg1;
4664 struct block **b2 = (struct block **) arg2;
4666 addr_diff = (BLOCK_START ((*b1))) - (BLOCK_START ((*b2)));
4668 return (BLOCK_END ((*b2))) - (BLOCK_END ((*b1)));
4672 /* Sort the blocks of a symtab S.
4673 Reorder the blocks in the blockvector by code-address,
4674 as required by some MI search routines. */
4677 sort_blocks (struct symtab *s)
4679 /* We have to cast away const here, but this is ok because we're
4680 constructing the blockvector in this code. */
4681 struct blockvector *bv = (struct blockvector *) SYMTAB_BLOCKVECTOR (s);
4683 if (BLOCKVECTOR_NBLOCKS (bv) <= FIRST_LOCAL_BLOCK)
4686 if (BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) == 0)
4687 BLOCK_START (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) = 0;
4688 if (BLOCK_END (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) == 0)
4689 BLOCK_START (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) = 0;
4693 * This is very unfortunate: normally all functions are compiled in
4694 * the order they are found, but if the file is compiled -O3 things
4695 * are very different. It would be nice to find a reliable test
4696 * to detect -O3 images in advance.
4698 if (BLOCKVECTOR_NBLOCKS (bv) > FIRST_LOCAL_BLOCK + 1)
4699 qsort (&BLOCKVECTOR_BLOCK (bv, FIRST_LOCAL_BLOCK),
4700 BLOCKVECTOR_NBLOCKS (bv) - FIRST_LOCAL_BLOCK,
4701 sizeof (struct block *),
4706 int i, j = BLOCKVECTOR_NBLOCKS (bv);
4708 for (i = FIRST_LOCAL_BLOCK; i < j; i++)
4709 if (high < BLOCK_END (BLOCKVECTOR_BLOCK (bv, i)))
4710 high = BLOCK_END (BLOCKVECTOR_BLOCK (bv, i));
4711 BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) = high;
4714 BLOCK_START (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) =
4715 BLOCK_START (BLOCKVECTOR_BLOCK (bv, FIRST_LOCAL_BLOCK));
4717 BLOCK_START (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) =
4718 BLOCK_START (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
4719 BLOCK_END (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) =
4720 BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
4724 /* Constructor/restructor/destructor procedures. */
4726 /* Allocate a new symtab for NAME. Needs an estimate of how many
4727 linenumbers MAXLINES we'll put in it. */
4729 static struct compunit_symtab *
4730 new_symtab (const char *name, int maxlines, struct objfile *objfile)
4732 struct compunit_symtab *cust = allocate_compunit_symtab (objfile, name);
4733 struct symtab *symtab;
4734 struct blockvector *bv;
4736 add_compunit_symtab_to_objfile (cust);
4737 symtab = allocate_symtab (cust, name);
4739 SYMTAB_LINETABLE (symtab) = new_linetable (maxlines);
4741 /* All symtabs must have at least two blocks. */
4743 BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK) = new_block (NON_FUNCTION_BLOCK);
4744 BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK) = new_block (NON_FUNCTION_BLOCK);
4745 BLOCK_SUPERBLOCK (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) =
4746 BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
4747 COMPUNIT_BLOCKVECTOR (cust) = bv;
4749 COMPUNIT_DEBUGFORMAT (cust) = "ECOFF";
4753 /* Allocate a new partial_symtab NAME. */
4755 static struct partial_symtab *
4756 new_psymtab (char *name, struct objfile *objfile)
4758 struct partial_symtab *psymtab;
4760 psymtab = allocate_psymtab (name, objfile);
4761 psymtab->section_offsets = objfile->section_offsets;
4763 /* Keep a backpointer to the file's symbols. */
4765 psymtab->read_symtab_private = obstack_alloc (&objfile->objfile_obstack,
4766 sizeof (struct symloc));
4767 memset (psymtab->read_symtab_private, 0, sizeof (struct symloc));
4768 CUR_BFD (psymtab) = cur_bfd;
4769 DEBUG_SWAP (psymtab) = debug_swap;
4770 DEBUG_INFO (psymtab) = debug_info;
4771 PENDING_LIST (psymtab) = pending_list;
4773 /* The way to turn this into a symtab is to call... */
4774 psymtab->read_symtab = mdebug_read_symtab;
4779 /* Allocate a linetable array of the given SIZE. Since the struct
4780 already includes one item, we subtract one when calculating the
4781 proper size to allocate. */
4783 static struct linetable *
4784 new_linetable (int size)
4786 struct linetable *l;
4790 size = size * sizeof (l->item) + sizeof (struct linetable);
4791 l = (struct linetable *) xmalloc (size);
4796 /* Oops, too big. Shrink it. This was important with the 2.4 linetables,
4797 I am not so sure about the 3.4 ones.
4799 Since the struct linetable already includes one item, we subtract one when
4800 calculating the proper size to allocate. */
4802 static struct linetable *
4803 shrink_linetable (struct linetable *lt)
4805 return (struct linetable *) xrealloc ((void *) lt,
4806 (sizeof (struct linetable)
4808 * sizeof (lt->item))));
4811 /* Allocate and zero a new blockvector of NBLOCKS blocks. */
4813 static struct blockvector *
4814 new_bvect (int nblocks)
4816 struct blockvector *bv;
4819 size = sizeof (struct blockvector) + nblocks * sizeof (struct block *);
4820 bv = (struct blockvector *) xzalloc (size);
4822 BLOCKVECTOR_NBLOCKS (bv) = nblocks;
4827 /* Allocate and zero a new block, and set its BLOCK_DICT. If function
4828 is non-zero, assume the block is associated to a function, and make
4829 sure that the symbols are stored linearly; otherwise, store them
4832 static struct block *
4833 new_block (enum block_type type)
4835 /* FIXME: carlton/2003-09-11: This should use allocate_block to
4836 allocate the block. Which, in turn, suggests that the block
4837 should be allocated on an obstack. */
4838 struct block *retval = xzalloc (sizeof (struct block));
4840 if (type == FUNCTION_BLOCK)
4841 BLOCK_DICT (retval) = dict_create_linear_expandable ();
4843 BLOCK_DICT (retval) = dict_create_hashed_expandable ();
4848 /* Create a new symbol with printname NAME. */
4850 static struct symbol *
4851 new_symbol (char *name)
4853 struct symbol *s = allocate_symbol (mdebugread_objfile);
4855 SYMBOL_SET_LANGUAGE (s, psymtab_language,
4856 &mdebugread_objfile->objfile_obstack);
4857 SYMBOL_SET_NAMES (s, name, strlen (name), 1, mdebugread_objfile);
4861 /* Create a new type with printname NAME. */
4863 static struct type *
4864 new_type (char *name)
4868 t = alloc_type (mdebugread_objfile);
4869 TYPE_NAME (t) = name;
4870 INIT_CPLUS_SPECIFIC (t);
4874 /* Read ECOFF debugging information from a BFD section. This is
4875 called from elfread.c. It parses the section into a
4876 ecoff_debug_info struct, and then lets the rest of the file handle
4880 elfmdebug_build_psymtabs (struct objfile *objfile,
4881 const struct ecoff_debug_swap *swap, asection *sec)
4883 bfd *abfd = objfile->obfd;
4884 struct ecoff_debug_info *info;
4885 struct cleanup *back_to;
4887 /* FIXME: It's not clear whether we should be getting minimal symbol
4888 information from .mdebug in an ELF file, or whether we will.
4889 Re-initialize the minimal symbol reader in case we do. */
4891 init_minimal_symbol_collection ();
4892 back_to = make_cleanup_discard_minimal_symbols ();
4894 info = ((struct ecoff_debug_info *)
4895 obstack_alloc (&objfile->objfile_obstack,
4896 sizeof (struct ecoff_debug_info)));
4898 if (!(*swap->read_debug_info) (abfd, sec, info))
4899 error (_("Error reading ECOFF debugging information: %s"),
4900 bfd_errmsg (bfd_get_error ()));
4902 mdebug_build_psymtabs (objfile, swap, info);
4904 install_minimal_symbols (objfile);
4905 do_cleanups (back_to);
4909 _initialize_mdebugread (void)
4911 basic_type_data = register_objfile_data ();
4913 mdebug_register_index
4914 = register_symbol_register_impl (LOC_REGISTER, &mdebug_register_funcs);
4915 mdebug_regparm_index
4916 = register_symbol_register_impl (LOC_REGPARM_ADDR, &mdebug_register_funcs);