1 /* Support routines for decoding "stabs" debugging information format.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
21 /* Support routines for reading and decoding debugging information in
22 the "stabs" format. This format is used with many systems that use
23 the a.out object file format, as well as some systems that use
24 COFF or ELF where the stabs data is placed in a special section.
25 Avoid placing any object file format specific code in this file. */
35 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native */
37 #include "aout/aout64.h"
38 #include "gdb-stabs.h"
40 #include "complaints.h"
45 /* Ask stabsread.h to define the vars it normally declares `extern'. */
47 #include "stabsread.h" /* Our own declarations */
50 /* The routines that read and process a complete stabs for a C struct or
51 C++ class pass lists of data member fields and lists of member function
52 fields in an instance of a field_info structure, as defined below.
53 This is part of some reorganization of low level C++ support and is
54 expected to eventually go away... (FIXME) */
60 struct nextfield
*next
;
62 /* This is the raw visibility from the stab. It is not checked
63 for being one of the visibilities we recognize, so code which
64 examines this field better be able to deal. */
69 struct next_fnfieldlist
71 struct next_fnfieldlist
*next
;
72 struct fn_fieldlist fn_fieldlist
;
77 dbx_alloc_type
PARAMS ((int [2], struct objfile
*));
79 static long read_huge_number
PARAMS ((char **, int, int *));
81 static struct type
*error_type
PARAMS ((char **));
84 patch_block_stabs
PARAMS ((struct pending
*, struct pending_stabs
*,
88 fix_common_block
PARAMS ((struct symbol
*, int));
91 read_type_number
PARAMS ((char **, int *));
94 read_range_type
PARAMS ((char **, int [2], struct objfile
*));
97 read_sun_builtin_type
PARAMS ((char **, int [2], struct objfile
*));
100 read_sun_floating_type
PARAMS ((char **, int [2], struct objfile
*));
103 read_enum_type
PARAMS ((char **, struct type
*, struct objfile
*));
106 rs6000_builtin_type
PARAMS ((int));
109 read_member_functions
PARAMS ((struct field_info
*, char **, struct type
*,
113 read_struct_fields
PARAMS ((struct field_info
*, char **, struct type
*,
117 read_baseclasses
PARAMS ((struct field_info
*, char **, struct type
*,
121 read_tilde_fields
PARAMS ((struct field_info
*, char **, struct type
*,
125 attach_fn_fields_to_type
PARAMS ((struct field_info
*, struct type
*));
128 attach_fields_to_type
PARAMS ((struct field_info
*, struct type
*,
132 read_struct_type
PARAMS ((char **, struct type
*, struct objfile
*));
135 read_array_type
PARAMS ((char **, struct type
*, struct objfile
*));
137 static struct type
**
138 read_args
PARAMS ((char **, int, struct objfile
*));
141 read_cpp_abbrev
PARAMS ((struct field_info
*, char **, struct type
*,
144 static const char vptr_name
[] = { '_','v','p','t','r',CPLUS_MARKER
,'\0' };
145 static const char vb_name
[] = { '_','v','b',CPLUS_MARKER
,'\0' };
147 /* Define this as 1 if a pcc declaration of a char or short argument
148 gives the correct address. Otherwise assume pcc gives the
149 address of the corresponding int, which is not the same on a
150 big-endian machine. */
152 #ifndef BELIEVE_PCC_PROMOTION
153 #define BELIEVE_PCC_PROMOTION 0
156 struct complaint invalid_cpp_abbrev_complaint
=
157 {"invalid C++ abbreviation `%s'", 0, 0};
159 struct complaint invalid_cpp_type_complaint
=
160 {"C++ abbreviated type name unknown at symtab pos %d", 0, 0};
162 struct complaint member_fn_complaint
=
163 {"member function type missing, got '%c'", 0, 0};
165 struct complaint const_vol_complaint
=
166 {"const/volatile indicator missing, got '%c'", 0, 0};
168 struct complaint error_type_complaint
=
169 {"debug info mismatch between compiler and debugger", 0, 0};
171 struct complaint invalid_member_complaint
=
172 {"invalid (minimal) member type data format at symtab pos %d.", 0, 0};
174 struct complaint range_type_base_complaint
=
175 {"base type %d of range type is not defined", 0, 0};
177 struct complaint reg_value_complaint
=
178 {"register number too large in symbol %s", 0, 0};
180 struct complaint vtbl_notfound_complaint
=
181 {"virtual function table pointer not found when defining class `%s'", 0, 0};
183 struct complaint unrecognized_cplus_name_complaint
=
184 {"Unknown C++ symbol name `%s'", 0, 0};
186 struct complaint rs6000_builtin_complaint
=
187 {"Unknown builtin type %d", 0, 0};
189 struct complaint stabs_general_complaint
=
192 /* Make a list of forward references which haven't been defined. */
194 static struct type
**undef_types
;
195 static int undef_types_allocated
;
196 static int undef_types_length
;
198 /* Check for and handle cretinous stabs symbol name continuation! */
199 #define STABS_CONTINUE(pp) \
201 if (**(pp) == '\\' || (**(pp) == '?' && (*(pp))[1] == '\0')) \
202 *(pp) = next_symbol_text (); \
205 /* FIXME: These probably should be our own types (like rs6000_builtin_type
206 has its own types) rather than builtin_type_*. */
207 static struct type
**os9k_type_vector
[] = {
213 &builtin_type_unsigned_char
,
214 &builtin_type_unsigned_short
,
215 &builtin_type_unsigned_long
,
216 &builtin_type_unsigned_int
,
218 &builtin_type_double
,
220 &builtin_type_long_double
223 static void os9k_init_type_vector
PARAMS ((struct type
**));
226 os9k_init_type_vector(tv
)
230 for (i
=0; i
<sizeof(os9k_type_vector
)/sizeof(struct type
**); i
++)
231 tv
[i
] = (os9k_type_vector
[i
] == 0 ? 0 : *(os9k_type_vector
[i
]));
234 /* Look up a dbx type-number pair. Return the address of the slot
235 where the type for that number-pair is stored.
236 The number-pair is in TYPENUMS.
238 This can be used for finding the type associated with that pair
239 or for associating a new type with the pair. */
242 dbx_lookup_type (typenums
)
245 register int filenum
= typenums
[0];
246 register int index
= typenums
[1];
248 register int real_filenum
;
249 register struct header_file
*f
;
252 if (filenum
== -1) /* -1,-1 is for temporary types. */
255 if (filenum
< 0 || filenum
>= n_this_object_header_files
)
257 static struct complaint msg
= {"\
258 Invalid symbol data: type number (%d,%d) out of range at symtab pos %d.",
260 complain (&msg
, filenum
, index
, symnum
);
268 /* Caller wants address of address of type. We think
269 that negative (rs6k builtin) types will never appear as
270 "lvalues", (nor should they), so we stuff the real type
271 pointer into a temp, and return its address. If referenced,
272 this will do the right thing. */
273 static struct type
*temp_type
;
275 temp_type
= rs6000_builtin_type(index
);
279 /* Type is defined outside of header files.
280 Find it in this object file's type vector. */
281 if (index
>= type_vector_length
)
283 old_len
= type_vector_length
;
286 type_vector_length
= INITIAL_TYPE_VECTOR_LENGTH
;
287 type_vector
= (struct type
**)
288 malloc (type_vector_length
* sizeof (struct type
*));
290 while (index
>= type_vector_length
)
292 type_vector_length
*= 2;
294 type_vector
= (struct type
**)
295 xrealloc ((char *) type_vector
,
296 (type_vector_length
* sizeof (struct type
*)));
297 memset (&type_vector
[old_len
], 0,
298 (type_vector_length
- old_len
) * sizeof (struct type
*));
301 /* Deal with OS9000 fundamental types. */
302 os9k_init_type_vector (type_vector
);
304 return (&type_vector
[index
]);
308 real_filenum
= this_object_header_files
[filenum
];
310 if (real_filenum
>= n_header_files
)
312 struct type
*temp_type
;
313 struct type
**temp_type_p
;
315 warning ("GDB internal error: bad real_filenum");
318 temp_type
= init_type (TYPE_CODE_ERROR
, 0, 0, NULL
, NULL
);
319 temp_type_p
= (struct type
**) xmalloc (sizeof (struct type
*));
320 *temp_type_p
= temp_type
;
324 f
= &header_files
[real_filenum
];
326 f_orig_length
= f
->length
;
327 if (index
>= f_orig_length
)
329 while (index
>= f
->length
)
333 f
->vector
= (struct type
**)
334 xrealloc ((char *) f
->vector
, f
->length
* sizeof (struct type
*));
335 memset (&f
->vector
[f_orig_length
], 0,
336 (f
->length
- f_orig_length
) * sizeof (struct type
*));
338 return (&f
->vector
[index
]);
342 /* Make sure there is a type allocated for type numbers TYPENUMS
343 and return the type object.
344 This can create an empty (zeroed) type object.
345 TYPENUMS may be (-1, -1) to return a new type object that is not
346 put into the type vector, and so may not be referred to by number. */
349 dbx_alloc_type (typenums
, objfile
)
351 struct objfile
*objfile
;
353 register struct type
**type_addr
;
355 if (typenums
[0] == -1)
357 return (alloc_type (objfile
));
360 type_addr
= dbx_lookup_type (typenums
);
362 /* If we are referring to a type not known at all yet,
363 allocate an empty type for it.
364 We will fill it in later if we find out how. */
367 *type_addr
= alloc_type (objfile
);
373 /* for all the stabs in a given stab vector, build appropriate types
374 and fix their symbols in given symbol vector. */
377 patch_block_stabs (symbols
, stabs
, objfile
)
378 struct pending
*symbols
;
379 struct pending_stabs
*stabs
;
380 struct objfile
*objfile
;
390 /* for all the stab entries, find their corresponding symbols and
391 patch their types! */
393 for (ii
= 0; ii
< stabs
->count
; ++ii
)
395 name
= stabs
->stab
[ii
];
396 pp
= (char*) strchr (name
, ':');
400 pp
= (char *)strchr(pp
, ':');
402 sym
= find_symbol_in_list (symbols
, name
, pp
-name
);
405 /* FIXME-maybe: it would be nice if we noticed whether
406 the variable was defined *anywhere*, not just whether
407 it is defined in this compilation unit. But neither
408 xlc or GCC seem to need such a definition, and until
409 we do psymtabs (so that the minimal symbols from all
410 compilation units are available now), I'm not sure
411 how to get the information. */
413 /* On xcoff, if a global is defined and never referenced,
414 ld will remove it from the executable. There is then
415 a N_GSYM stab for it, but no regular (C_EXT) symbol. */
416 sym
= (struct symbol
*)
417 obstack_alloc (&objfile
->symbol_obstack
,
418 sizeof (struct symbol
));
420 memset (sym
, 0, sizeof (struct symbol
));
421 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
422 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
424 obstack_copy0 (&objfile
->symbol_obstack
, name
, pp
- name
);
426 if (*(pp
-1) == 'F' || *(pp
-1) == 'f')
428 /* I don't think the linker does this with functions,
429 so as far as I know this is never executed.
430 But it doesn't hurt to check. */
432 lookup_function_type (read_type (&pp
, objfile
));
436 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
438 add_symbol_to_list (sym
, &global_symbols
);
443 if (*(pp
-1) == 'F' || *(pp
-1) == 'f')
446 lookup_function_type (read_type (&pp
, objfile
));
450 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
458 /* Read a number by which a type is referred to in dbx data,
459 or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
460 Just a single number N is equivalent to (0,N).
461 Return the two numbers by storing them in the vector TYPENUMS.
462 TYPENUMS will then be used as an argument to dbx_lookup_type.
464 Returns 0 for success, -1 for error. */
467 read_type_number (pp
, typenums
)
469 register int *typenums
;
475 typenums
[0] = read_huge_number (pp
, ',', &nbits
);
476 if (nbits
!= 0) return -1;
477 typenums
[1] = read_huge_number (pp
, ')', &nbits
);
478 if (nbits
!= 0) return -1;
483 typenums
[1] = read_huge_number (pp
, 0, &nbits
);
484 if (nbits
!= 0) return -1;
490 /* To handle GNU C++ typename abbreviation, we need to be able to
491 fill in a type's name as soon as space for that type is allocated.
492 `type_synonym_name' is the name of the type being allocated.
493 It is cleared as soon as it is used (lest all allocated types
496 static char *type_synonym_name
;
498 #if !defined (REG_STRUCT_HAS_ADDR)
499 #define REG_STRUCT_HAS_ADDR(gcc_p,type) 0
504 define_symbol (valu
, string
, desc
, type
, objfile
)
509 struct objfile
*objfile
;
511 register struct symbol
*sym
;
512 char *p
= (char *) strchr (string
, ':');
517 /* We would like to eliminate nameless symbols, but keep their types.
518 E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
519 to type 2, but, should not create a symbol to address that type. Since
520 the symbol will be nameless, there is no way any user can refer to it. */
524 /* Ignore syms with empty names. */
528 /* Ignore old-style symbols from cc -go */
538 /* If a nameless stab entry, all we need is the type, not the symbol.
539 e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
540 nameless
= (p
== string
|| ((string
[0] == ' ') && (string
[1] == ':')));
542 sym
= (struct symbol
*)
543 obstack_alloc (&objfile
-> symbol_obstack
, sizeof (struct symbol
));
544 memset (sym
, 0, sizeof (struct symbol
));
546 switch (type
& N_TYPE
)
549 SYMBOL_SECTION(sym
) = SECT_OFF_TEXT
;
552 SYMBOL_SECTION(sym
) = SECT_OFF_DATA
;
555 SYMBOL_SECTION(sym
) = SECT_OFF_BSS
;
559 if (processing_gcc_compilation
)
561 /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
562 number of bytes occupied by a type or object, which we ignore. */
563 SYMBOL_LINE(sym
) = desc
;
567 SYMBOL_LINE(sym
) = 0; /* unknown */
570 if (string
[0] == CPLUS_MARKER
)
572 /* Special GNU C++ names. */
576 SYMBOL_NAME (sym
) = obsavestring ("this", strlen ("this"),
577 &objfile
-> symbol_obstack
);
580 case 'v': /* $vtbl_ptr_type */
581 /* Was: SYMBOL_NAME (sym) = "vptr"; */
585 SYMBOL_NAME (sym
) = obsavestring ("eh_throw", strlen ("eh_throw"),
586 &objfile
-> symbol_obstack
);
590 /* This was an anonymous type that was never fixed up. */
594 complain (&unrecognized_cplus_name_complaint
, string
);
595 goto normal
; /* Do *something* with it */
601 SYMBOL_LANGUAGE (sym
) = current_subfile
-> language
;
602 SYMBOL_NAME (sym
) = (char *)
603 obstack_alloc (&objfile
-> symbol_obstack
, ((p
- string
) + 1));
604 /* Open-coded memcpy--saves function call time. */
605 /* FIXME: Does it really? Try replacing with simple strcpy and
606 try it on an executable with a large symbol table. */
607 /* FIXME: considering that gcc can open code memcpy anyway, I
608 doubt it. xoxorich. */
610 register char *p1
= string
;
611 register char *p2
= SYMBOL_NAME (sym
);
619 /* If this symbol is from a C++ compilation, then attempt to cache the
620 demangled form for future reference. This is a typical time versus
621 space tradeoff, that was decided in favor of time because it sped up
622 C++ symbol lookups by a factor of about 20. */
624 SYMBOL_INIT_DEMANGLED_NAME (sym
, &objfile
->symbol_obstack
);
628 /* Determine the type of name being defined. */
630 /* Getting GDB to correctly skip the symbol on an undefined symbol
631 descriptor and not ever dump core is a very dodgy proposition if
632 we do things this way. I say the acorn RISC machine can just
633 fix their compiler. */
634 /* The Acorn RISC machine's compiler can put out locals that don't
635 start with "234=" or "(3,4)=", so assume anything other than the
636 deftypes we know how to handle is a local. */
637 if (!strchr ("cfFGpPrStTvVXCR", *p
))
639 if (isdigit (*p
) || *p
== '(' || *p
== '-')
648 /* c is a special case, not followed by a type-number.
649 SYMBOL:c=iVALUE for an integer constant symbol.
650 SYMBOL:c=rVALUE for a floating constant symbol.
651 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
652 e.g. "b:c=e6,0" for "const b = blob1"
653 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
656 SYMBOL_CLASS (sym
) = LOC_CONST
;
657 SYMBOL_TYPE (sym
) = error_type (&p
);
658 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
659 add_symbol_to_list (sym
, &file_symbols
);
670 /* FIXME-if-picky-about-floating-accuracy: Should be using
671 target arithmetic to get the value. real.c in GCC
672 probably has the necessary code. */
674 /* FIXME: lookup_fundamental_type is a hack. We should be
675 creating a type especially for the type of float constants.
676 Problem is, what type should it be?
678 Also, what should the name of this type be? Should we
679 be using 'S' constants (see stabs.texinfo) instead? */
681 SYMBOL_TYPE (sym
) = lookup_fundamental_type (objfile
,
684 obstack_alloc (&objfile
-> symbol_obstack
,
685 TYPE_LENGTH (SYMBOL_TYPE (sym
)));
686 store_floating (dbl_valu
, TYPE_LENGTH (SYMBOL_TYPE (sym
)), d
);
687 SYMBOL_VALUE_BYTES (sym
) = dbl_valu
;
688 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
693 /* Defining integer constants this way is kind of silly,
694 since 'e' constants allows the compiler to give not
695 only the value, but the type as well. C has at least
696 int, long, unsigned int, and long long as constant
697 types; other languages probably should have at least
698 unsigned as well as signed constants. */
700 /* We just need one int constant type for all objfiles.
701 It doesn't depend on languages or anything (arguably its
702 name should be a language-specific name for a type of
703 that size, but I'm inclined to say that if the compiler
704 wants a nice name for the type, it can use 'e'). */
705 static struct type
*int_const_type
;
707 /* Yes, this is as long as a *host* int. That is because we
709 if (int_const_type
== NULL
)
711 init_type (TYPE_CODE_INT
,
712 sizeof (int) * HOST_CHAR_BIT
/ TARGET_CHAR_BIT
, 0,
714 (struct objfile
*)NULL
);
715 SYMBOL_TYPE (sym
) = int_const_type
;
716 SYMBOL_VALUE (sym
) = atoi (p
);
717 SYMBOL_CLASS (sym
) = LOC_CONST
;
721 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
722 can be represented as integral.
723 e.g. "b:c=e6,0" for "const b = blob1"
724 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
726 SYMBOL_CLASS (sym
) = LOC_CONST
;
727 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
731 SYMBOL_TYPE (sym
) = error_type (&p
);
736 /* If the value is too big to fit in an int (perhaps because
737 it is unsigned), or something like that, we silently get
738 a bogus value. The type and everything else about it is
739 correct. Ideally, we should be using whatever we have
740 available for parsing unsigned and long long values,
742 SYMBOL_VALUE (sym
) = atoi (p
);
747 SYMBOL_CLASS (sym
) = LOC_CONST
;
748 SYMBOL_TYPE (sym
) = error_type (&p
);
751 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
752 add_symbol_to_list (sym
, &file_symbols
);
756 /* The name of a caught exception. */
757 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
758 SYMBOL_CLASS (sym
) = LOC_LABEL
;
759 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
760 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
761 add_symbol_to_list (sym
, &local_symbols
);
765 /* A static function definition. */
766 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
767 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
768 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
769 add_symbol_to_list (sym
, &file_symbols
);
770 /* fall into process_function_types. */
772 process_function_types
:
773 /* Function result types are described as the result type in stabs.
774 We need to convert this to the function-returning-type-X type
775 in GDB. E.g. "int" is converted to "function returning int". */
776 if (TYPE_CODE (SYMBOL_TYPE (sym
)) != TYPE_CODE_FUNC
)
779 /* This code doesn't work -- it needs to realloc and can't. */
780 /* Attempt to set up to record a function prototype... */
781 struct type
*new = alloc_type (objfile
);
783 /* Generate a template for the type of this function. The
784 types of the arguments will be added as we read the symbol
786 *new = *lookup_function_type (SYMBOL_TYPE(sym
));
787 SYMBOL_TYPE(sym
) = new;
788 TYPE_OBJFILE (new) = objfile
;
789 in_function_type
= new;
791 SYMBOL_TYPE (sym
) = lookup_function_type (SYMBOL_TYPE (sym
));
794 /* fall into process_prototype_types */
796 process_prototype_types
:
797 /* Sun acc puts declared types of arguments here. We don't care
798 about their actual types (FIXME -- we should remember the whole
799 function prototype), but the list may define some new types
800 that we have to remember, so we must scan it now. */
803 read_type (&p
, objfile
);
808 /* A global function definition. */
809 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
810 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
811 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
812 add_symbol_to_list (sym
, &global_symbols
);
813 goto process_function_types
;
816 /* For a class G (global) symbol, it appears that the
817 value is not correct. It is necessary to search for the
818 corresponding linker definition to find the value.
819 These definitions appear at the end of the namelist. */
820 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
821 i
= hashname (SYMBOL_NAME (sym
));
822 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
823 global_sym_chain
[i
] = sym
;
824 SYMBOL_CLASS (sym
) = LOC_STATIC
;
825 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
826 add_symbol_to_list (sym
, &global_symbols
);
829 /* This case is faked by a conditional above,
830 when there is no code letter in the dbx data.
831 Dbx data never actually contains 'l'. */
834 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
835 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
836 SYMBOL_VALUE (sym
) = valu
;
837 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
838 add_symbol_to_list (sym
, &local_symbols
);
843 /* pF is a two-letter code that means a function parameter in Fortran.
844 The type-number specifies the type of the return value.
845 Translate it into a pointer-to-function type. */
849 = lookup_pointer_type
850 (lookup_function_type (read_type (&p
, objfile
)));
853 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
855 /* Normally this is a parameter, a LOC_ARG. On the i960, it
856 can also be a LOC_LOCAL_ARG depending on symbol type. */
857 #ifndef DBX_PARM_SYMBOL_CLASS
858 #define DBX_PARM_SYMBOL_CLASS(type) LOC_ARG
861 SYMBOL_CLASS (sym
) = DBX_PARM_SYMBOL_CLASS (type
);
862 SYMBOL_VALUE (sym
) = valu
;
863 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
865 /* This doesn't work yet. */
866 add_param_to_type (&in_function_type
, sym
);
868 add_symbol_to_list (sym
, &local_symbols
);
870 #if TARGET_BYTE_ORDER == LITTLE_ENDIAN
871 /* On little-endian machines, this crud is never necessary, and,
872 if the extra bytes contain garbage, is harmful. */
874 #else /* Big endian. */
875 /* If it's gcc-compiled, if it says `short', believe it. */
876 if (processing_gcc_compilation
|| BELIEVE_PCC_PROMOTION
)
879 #if !BELIEVE_PCC_PROMOTION
881 /* This is the signed type which arguments get promoted to. */
882 static struct type
*pcc_promotion_type
;
883 /* This is the unsigned type which arguments get promoted to. */
884 static struct type
*pcc_unsigned_promotion_type
;
886 /* Call it "int" because this is mainly C lossage. */
887 if (pcc_promotion_type
== NULL
)
889 init_type (TYPE_CODE_INT
, TARGET_INT_BIT
/ TARGET_CHAR_BIT
,
892 if (pcc_unsigned_promotion_type
== NULL
)
893 pcc_unsigned_promotion_type
=
894 init_type (TYPE_CODE_INT
, TARGET_INT_BIT
/ TARGET_CHAR_BIT
,
895 TYPE_FLAG_UNSIGNED
, "unsigned int", NULL
);
897 #if defined(BELIEVE_PCC_PROMOTION_TYPE)
898 /* This macro is defined on machines (e.g. sparc) where
899 we should believe the type of a PCC 'short' argument,
900 but shouldn't believe the address (the address is
901 the address of the corresponding int).
903 My guess is that this correction, as opposed to changing
904 the parameter to an 'int' (as done below, for PCC
905 on most machines), is the right thing to do
906 on all machines, but I don't want to risk breaking
907 something that already works. On most PCC machines,
908 the sparc problem doesn't come up because the calling
909 function has to zero the top bytes (not knowing whether
910 the called function wants an int or a short), so there
911 is little practical difference between an int and a short
912 (except perhaps what happens when the GDB user types
913 "print short_arg = 0x10000;").
915 Hacked for SunOS 4.1 by gnu@cygnus.com. In 4.1, the compiler
916 actually produces the correct address (we don't need to fix it
917 up). I made this code adapt so that it will offset the symbol
918 if it was pointing at an int-aligned location and not
919 otherwise. This way you can use the same gdb for 4.0.x and
922 If the parameter is shorter than an int, and is integral
923 (e.g. char, short, or unsigned equivalent), and is claimed to
924 be passed on an integer boundary, don't believe it! Offset the
925 parameter's address to the tail-end of that integer. */
927 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) < TYPE_LENGTH (pcc_promotion_type
)
928 && TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_INT
929 && 0 == SYMBOL_VALUE (sym
) % TYPE_LENGTH (pcc_promotion_type
))
931 SYMBOL_VALUE (sym
) += TYPE_LENGTH (pcc_promotion_type
)
932 - TYPE_LENGTH (SYMBOL_TYPE (sym
));
936 #else /* no BELIEVE_PCC_PROMOTION_TYPE. */
938 /* If PCC says a parameter is a short or a char,
939 it is really an int. */
940 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) < TYPE_LENGTH (pcc_promotion_type
)
941 && TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_INT
)
944 TYPE_UNSIGNED (SYMBOL_TYPE (sym
))
945 ? pcc_unsigned_promotion_type
946 : pcc_promotion_type
;
950 #endif /* no BELIEVE_PCC_PROMOTION_TYPE. */
952 #endif /* !BELIEVE_PCC_PROMOTION. */
953 #endif /* Big endian. */
956 /* acc seems to use P to delare the prototypes of functions that
957 are referenced by this file. gdb is not prepared to deal
958 with this extra information. FIXME, it ought to. */
961 read_type (&p
, objfile
);
962 goto process_prototype_types
;
967 /* Parameter which is in a register. */
968 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
969 SYMBOL_CLASS (sym
) = LOC_REGPARM
;
970 SYMBOL_VALUE (sym
) = STAB_REG_TO_REGNUM (valu
);
971 if (SYMBOL_VALUE (sym
) >= NUM_REGS
)
973 complain (®_value_complaint
, SYMBOL_SOURCE_NAME (sym
));
974 SYMBOL_VALUE (sym
) = SP_REGNUM
; /* Known safe, though useless */
976 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
977 add_symbol_to_list (sym
, &local_symbols
);
981 /* Register variable (either global or local). */
982 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
983 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
984 SYMBOL_VALUE (sym
) = STAB_REG_TO_REGNUM (valu
);
985 if (SYMBOL_VALUE (sym
) >= NUM_REGS
)
987 complain (®_value_complaint
, SYMBOL_SOURCE_NAME (sym
));
988 SYMBOL_VALUE (sym
) = SP_REGNUM
; /* Known safe, though useless */
990 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
993 /* Sun cc uses a pair of symbols, one 'p' and one 'r' with the same
994 name to represent an argument passed in a register.
995 GCC uses 'P' for the same case. So if we find such a symbol pair
996 we combine it into one 'P' symbol. For Sun cc we need to do this
997 regardless of REG_STRUCT_HAS_ADDR, because the compiler puts out
998 the 'p' symbol even if it never saves the argument onto the stack.
1000 On most machines, we want to preserve both symbols, so that
1001 we can still get information about what is going on with the
1002 stack (VAX for computing args_printed, using stack slots instead
1003 of saved registers in backtraces, etc.).
1005 Note that this code illegally combines
1006 main(argc) struct foo argc; { register struct foo argc; }
1007 but this case is considered pathological and causes a warning
1008 from a decent compiler. */
1011 && local_symbols
->nsyms
> 0
1012 #ifndef USE_REGISTER_NOT_ARG
1013 && REG_STRUCT_HAS_ADDR (processing_gcc_compilation
,
1015 && (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_STRUCT
1016 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_UNION
)
1020 struct symbol
*prev_sym
;
1021 prev_sym
= local_symbols
->symbol
[local_symbols
->nsyms
- 1];
1022 if ((SYMBOL_CLASS (prev_sym
) == LOC_REF_ARG
1023 || SYMBOL_CLASS (prev_sym
) == LOC_ARG
)
1024 && STREQ (SYMBOL_NAME (prev_sym
), SYMBOL_NAME(sym
)))
1026 SYMBOL_CLASS (prev_sym
) = LOC_REGPARM
;
1027 /* Use the type from the LOC_REGISTER; that is the type
1028 that is actually in that register. */
1029 SYMBOL_TYPE (prev_sym
) = SYMBOL_TYPE (sym
);
1030 SYMBOL_VALUE (prev_sym
) = SYMBOL_VALUE (sym
);
1035 add_symbol_to_list (sym
, &local_symbols
);
1038 add_symbol_to_list (sym
, &file_symbols
);
1042 /* Static symbol at top level of file */
1043 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1044 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1045 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
1046 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
1047 add_symbol_to_list (sym
, &file_symbols
);
1051 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1053 /* For a nameless type, we don't want a create a symbol, thus we
1054 did not use `sym'. Return without further processing. */
1055 if (nameless
) return NULL
;
1057 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1058 SYMBOL_VALUE (sym
) = valu
;
1059 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
1060 /* C++ vagaries: we may have a type which is derived from
1061 a base type which did not have its name defined when the
1062 derived class was output. We fill in the derived class's
1063 base part member's name here in that case. */
1064 if (TYPE_NAME (SYMBOL_TYPE (sym
)) != NULL
)
1065 if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_STRUCT
1066 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_UNION
)
1067 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)))
1070 for (j
= TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)) - 1; j
>= 0; j
--)
1071 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) == 0)
1072 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) =
1073 type_name_no_tag (TYPE_BASECLASS (SYMBOL_TYPE (sym
), j
));
1076 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == NULL
)
1078 /* gcc-2.6 or later (when using -fvtable-thunks)
1079 emits a unique named type for a vtable entry.
1080 Some gdb code depends on that specific name. */
1081 extern const char vtbl_ptr_name
[];
1083 if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_PTR
1084 && strcmp (SYMBOL_NAME (sym
), vtbl_ptr_name
))
1085 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_FUNC
)
1087 /* If we are giving a name to a type such as "pointer to
1088 foo" or "function returning foo", we better not set
1089 the TYPE_NAME. If the program contains "typedef char
1090 *caddr_t;", we don't want all variables of type char
1091 * to print as caddr_t. This is not just a
1092 consequence of GDB's type management; PCC and GCC (at
1093 least through version 2.4) both output variables of
1094 either type char * or caddr_t with the type number
1095 defined in the 't' symbol for caddr_t. If a future
1096 compiler cleans this up it GDB is not ready for it
1097 yet, but if it becomes ready we somehow need to
1098 disable this check (without breaking the PCC/GCC2.4
1103 Fortunately, this check seems not to be necessary
1104 for anything except pointers or functions. */
1107 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_NAME (sym
);
1110 add_symbol_to_list (sym
, &file_symbols
);
1114 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1115 by 't' which means we are typedef'ing it as well. */
1116 synonym
= *p
== 't';
1121 type_synonym_name
= obsavestring (SYMBOL_NAME (sym
),
1122 strlen (SYMBOL_NAME (sym
)),
1123 &objfile
-> symbol_obstack
);
1125 /* The semantics of C++ state that "struct foo { ... }" also defines
1126 a typedef for "foo". Unfortunately, cfront never makes the typedef
1127 when translating C++ into C. We make the typedef here so that
1128 "ptype foo" works as expected for cfront translated code. */
1129 else if (current_subfile
->language
== language_cplus
)
1132 type_synonym_name
= obsavestring (SYMBOL_NAME (sym
),
1133 strlen (SYMBOL_NAME (sym
)),
1134 &objfile
-> symbol_obstack
);
1137 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1139 /* For a nameless type, we don't want a create a symbol, thus we
1140 did not use `sym'. Return without further processing. */
1141 if (nameless
) return NULL
;
1143 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1144 SYMBOL_VALUE (sym
) = valu
;
1145 SYMBOL_NAMESPACE (sym
) = STRUCT_NAMESPACE
;
1146 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym
)) == 0)
1147 TYPE_TAG_NAME (SYMBOL_TYPE (sym
))
1148 = obconcat (&objfile
-> type_obstack
, "", "", SYMBOL_NAME (sym
));
1149 add_symbol_to_list (sym
, &file_symbols
);
1153 /* Clone the sym and then modify it. */
1154 register struct symbol
*typedef_sym
= (struct symbol
*)
1155 obstack_alloc (&objfile
-> symbol_obstack
, sizeof (struct symbol
));
1156 *typedef_sym
= *sym
;
1157 SYMBOL_CLASS (typedef_sym
) = LOC_TYPEDEF
;
1158 SYMBOL_VALUE (typedef_sym
) = valu
;
1159 SYMBOL_NAMESPACE (typedef_sym
) = VAR_NAMESPACE
;
1160 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1161 TYPE_NAME (SYMBOL_TYPE (sym
))
1162 = obconcat (&objfile
-> type_obstack
, "", "", SYMBOL_NAME (sym
));
1163 add_symbol_to_list (typedef_sym
, &file_symbols
);
1168 /* Static symbol of local scope */
1169 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1170 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1171 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
1172 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
1174 add_symbol_to_list (sym
, &global_symbols
);
1176 add_symbol_to_list (sym
, &local_symbols
);
1180 /* Reference parameter */
1181 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1182 SYMBOL_CLASS (sym
) = LOC_REF_ARG
;
1183 SYMBOL_VALUE (sym
) = valu
;
1184 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
1185 add_symbol_to_list (sym
, &local_symbols
);
1189 /* This is used by Sun FORTRAN for "function result value".
1190 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1191 that Pascal uses it too, but when I tried it Pascal used
1192 "x:3" (local symbol) instead. */
1193 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1194 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
1195 SYMBOL_VALUE (sym
) = valu
;
1196 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
1197 add_symbol_to_list (sym
, &local_symbols
);
1201 SYMBOL_TYPE (sym
) = error_type (&p
);
1202 SYMBOL_CLASS (sym
) = LOC_CONST
;
1203 SYMBOL_VALUE (sym
) = 0;
1204 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
1205 add_symbol_to_list (sym
, &file_symbols
);
1209 /* When passing structures to a function, some systems sometimes pass
1210 the address in a register, not the structure itself.
1212 If REG_STRUCT_HAS_ADDR yields non-zero we have to convert LOC_REGPARM
1213 to LOC_REGPARM_ADDR for structures and unions. */
1215 if (SYMBOL_CLASS (sym
) == LOC_REGPARM
1216 && REG_STRUCT_HAS_ADDR (processing_gcc_compilation
,
1218 && ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_STRUCT
)
1219 || (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_UNION
)))
1220 SYMBOL_CLASS (sym
) = LOC_REGPARM_ADDR
;
1222 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th and
1223 subsequent arguments on the sparc, for example). */
1224 if (SYMBOL_CLASS (sym
) == LOC_ARG
1225 && REG_STRUCT_HAS_ADDR (processing_gcc_compilation
,
1227 && ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_STRUCT
)
1228 || (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_UNION
)))
1229 SYMBOL_CLASS (sym
) = LOC_REF_ARG
;
1235 /* Skip rest of this symbol and return an error type.
1237 General notes on error recovery: error_type always skips to the
1238 end of the symbol (modulo cretinous dbx symbol name continuation).
1239 Thus code like this:
1241 if (*(*pp)++ != ';')
1242 return error_type (pp);
1244 is wrong because if *pp starts out pointing at '\0' (typically as the
1245 result of an earlier error), it will be incremented to point to the
1246 start of the next symbol, which might produce strange results, at least
1247 if you run off the end of the string table. Instead use
1250 return error_type (pp);
1256 foo = error_type (pp);
1260 And in case it isn't obvious, the point of all this hair is so the compiler
1261 can define new types and new syntaxes, and old versions of the
1262 debugger will be able to read the new symbol tables. */
1264 static struct type
*
1268 complain (&error_type_complaint
);
1271 /* Skip to end of symbol. */
1272 while (**pp
!= '\0')
1277 /* Check for and handle cretinous dbx symbol name continuation! */
1278 if ((*pp
)[-1] == '\\' || (*pp
)[-1] == '?')
1280 *pp
= next_symbol_text ();
1287 return (builtin_type_error
);
1291 /* Read type information or a type definition; return the type. Even
1292 though this routine accepts either type information or a type
1293 definition, the distinction is relevant--some parts of stabsread.c
1294 assume that type information starts with a digit, '-', or '(' in
1295 deciding whether to call read_type. */
1298 read_type (pp
, objfile
)
1300 struct objfile
*objfile
;
1302 register struct type
*type
= 0;
1306 char type_descriptor
;
1308 /* Size in bits of type if specified by a type attribute, or -1 if
1309 there is no size attribute. */
1312 /* Used to distinguish string and bitstring from char-array and set. */
1315 /* Read type number if present. The type number may be omitted.
1316 for instance in a two-dimensional array declared with type
1317 "ar1;1;10;ar1;1;10;4". */
1318 if ((**pp
>= '0' && **pp
<= '9')
1322 if (read_type_number (pp
, typenums
) != 0)
1323 return error_type (pp
);
1325 /* Type is not being defined here. Either it already exists,
1326 or this is a forward reference to it. dbx_alloc_type handles
1329 return dbx_alloc_type (typenums
, objfile
);
1331 /* Type is being defined here. */
1338 /* It might be a type attribute or a member type. */
1339 if (isdigit (*p
) || *p
== '(' || *p
== '-')
1344 /* Type attributes. */
1347 /* Skip to the semicolon. */
1348 while (*p
!= ';' && *p
!= '\0')
1352 return error_type (pp
);
1354 /* Skip the semicolon. */
1360 type_size
= atoi (attr
+ 1);
1370 /* Ignore unrecognized type attributes, so future compilers
1371 can invent new ones. */
1376 /* Skip the type descriptor, we get it below with (*pp)[-1]. */
1381 /* 'typenums=' not present, type is anonymous. Read and return
1382 the definition, but don't put it in the type vector. */
1383 typenums
[0] = typenums
[1] = -1;
1387 type_descriptor
= (*pp
)[-1];
1388 switch (type_descriptor
)
1392 enum type_code code
;
1394 /* Used to index through file_symbols. */
1395 struct pending
*ppt
;
1398 /* Name including "struct", etc. */
1402 char *from
, *to
, *p
, *q1
, *q2
;
1404 /* Set the type code according to the following letter. */
1408 code
= TYPE_CODE_STRUCT
;
1411 code
= TYPE_CODE_UNION
;
1414 code
= TYPE_CODE_ENUM
;
1418 /* Complain and keep going, so compilers can invent new
1419 cross-reference types. */
1420 static struct complaint msg
=
1421 {"Unrecognized cross-reference type `%c'", 0, 0};
1422 complain (&msg
, (*pp
)[0]);
1423 code
= TYPE_CODE_STRUCT
;
1428 q1
= strchr(*pp
, '<');
1429 p
= strchr(*pp
, ':');
1431 return error_type (pp
);
1432 while (q1
&& p
> q1
&& p
[1] == ':')
1434 q2
= strchr(q1
, '>');
1440 return error_type (pp
);
1443 (char *)obstack_alloc (&objfile
->type_obstack
, p
- *pp
+ 1);
1445 /* Copy the name. */
1451 /* Set the pointer ahead of the name which we just read, and
1456 /* Now check to see whether the type has already been
1457 declared. This was written for arrays of cross-referenced
1458 types before we had TYPE_CODE_TARGET_STUBBED, so I'm pretty
1459 sure it is not necessary anymore. But it might be a good
1460 idea, to save a little memory. */
1462 for (ppt
= file_symbols
; ppt
; ppt
= ppt
->next
)
1463 for (i
= 0; i
< ppt
->nsyms
; i
++)
1465 struct symbol
*sym
= ppt
->symbol
[i
];
1467 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
1468 && SYMBOL_NAMESPACE (sym
) == STRUCT_NAMESPACE
1469 && (TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
1470 && STREQ (SYMBOL_NAME (sym
), type_name
))
1472 obstack_free (&objfile
-> type_obstack
, type_name
);
1473 type
= SYMBOL_TYPE (sym
);
1478 /* Didn't find the type to which this refers, so we must
1479 be dealing with a forward reference. Allocate a type
1480 structure for it, and keep track of it so we can
1481 fill in the rest of the fields when we get the full
1483 type
= dbx_alloc_type (typenums
, objfile
);
1484 TYPE_CODE (type
) = code
;
1485 TYPE_TAG_NAME (type
) = type_name
;
1486 INIT_CPLUS_SPECIFIC(type
);
1487 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB
;
1489 add_undefined_type (type
);
1493 case '-': /* RS/6000 built-in type */
1512 /* Peek ahead at the number to detect void. */
1513 if (read_type_number (pp
, xtypenums
) != 0)
1514 return error_type (pp
);
1516 if (typenums
[0] == xtypenums
[0] && typenums
[1] == xtypenums
[1])
1517 /* It's being defined as itself. That means it is "void". */
1518 type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
1523 /* Go back to the number and have read_type get it. This means
1524 that we can deal with something like t(1,2)=(3,4)=... which
1525 the Lucid compiler uses. */
1527 xtype
= read_type (pp
, objfile
);
1529 /* The type is being defined to another type. So we copy the type.
1530 This loses if we copy a C++ class and so we lose track of how
1531 the names are mangled (but g++ doesn't output stabs like this
1534 type
= alloc_type (objfile
);
1535 memcpy (type
, xtype
, sizeof (struct type
));
1537 /* The idea behind clearing the names is that the only purpose
1538 for defining a type to another type is so that the name of
1539 one can be different. So we probably don't need to worry much
1540 about the case where the compiler doesn't give a name to the
1542 TYPE_NAME (type
) = NULL
;
1543 TYPE_TAG_NAME (type
) = NULL
;
1545 if (typenums
[0] != -1)
1546 *dbx_lookup_type (typenums
) = type
;
1550 /* In the following types, we must be sure to overwrite any existing
1551 type that the typenums refer to, rather than allocating a new one
1552 and making the typenums point to the new one. This is because there
1553 may already be pointers to the existing type (if it had been
1554 forward-referenced), and we must change it to a pointer, function,
1555 reference, or whatever, *in-place*. */
1558 type1
= read_type (pp
, objfile
);
1559 type
= make_pointer_type (type1
, dbx_lookup_type (typenums
));
1562 case '&': /* Reference to another type */
1563 type1
= read_type (pp
, objfile
);
1564 type
= make_reference_type (type1
, dbx_lookup_type (typenums
));
1567 case 'f': /* Function returning another type */
1568 if (os9k_stabs
&& **pp
== '(')
1570 /* Function prototype; parse it.
1571 We must conditionalize this on os9k_stabs because otherwise
1572 it could be confused with a Sun-style (1,3) typenumber
1578 t
= read_type(pp
, objfile
);
1579 if (**pp
== ',') ++*pp
;
1582 type1
= read_type (pp
, objfile
);
1583 type
= make_function_type (type1
, dbx_lookup_type (typenums
));
1586 case 'k': /* Const qualifier on some type (Sun) */
1587 case 'c': /* Const qualifier on some type (OS9000) */
1588 /* Because 'c' means other things to AIX and 'k' is perfectly good,
1589 only accept 'c' in the os9k_stabs case. */
1590 if (type_descriptor
== 'c' && !os9k_stabs
)
1591 return error_type (pp
);
1592 type
= read_type (pp
, objfile
);
1593 /* FIXME! For now, we ignore const and volatile qualifiers. */
1596 case 'B': /* Volatile qual on some type (Sun) */
1597 case 'i': /* Volatile qual on some type (OS9000) */
1598 /* Because 'i' means other things to AIX and 'B' is perfectly good,
1599 only accept 'i' in the os9k_stabs case. */
1600 if (type_descriptor
== 'i' && !os9k_stabs
)
1601 return error_type (pp
);
1602 type
= read_type (pp
, objfile
);
1603 /* FIXME! For now, we ignore const and volatile qualifiers. */
1606 /* FIXME -- we should be doing smash_to_XXX types here. */
1607 case '@': /* Member (class & variable) type */
1609 struct type
*domain
= read_type (pp
, objfile
);
1610 struct type
*memtype
;
1613 /* Invalid member type data format. */
1614 return error_type (pp
);
1617 memtype
= read_type (pp
, objfile
);
1618 type
= dbx_alloc_type (typenums
, objfile
);
1619 smash_to_member_type (type
, domain
, memtype
);
1623 case '#': /* Method (class & fn) type */
1624 if ((*pp
)[0] == '#')
1626 /* We'll get the parameter types from the name. */
1627 struct type
*return_type
;
1630 return_type
= read_type (pp
, objfile
);
1631 if (*(*pp
)++ != ';')
1632 complain (&invalid_member_complaint
, symnum
);
1633 type
= allocate_stub_method (return_type
);
1634 if (typenums
[0] != -1)
1635 *dbx_lookup_type (typenums
) = type
;
1639 struct type
*domain
= read_type (pp
, objfile
);
1640 struct type
*return_type
;
1644 /* Invalid member type data format. */
1645 return error_type (pp
);
1649 return_type
= read_type (pp
, objfile
);
1650 args
= read_args (pp
, ';', objfile
);
1651 type
= dbx_alloc_type (typenums
, objfile
);
1652 smash_to_method_type (type
, domain
, return_type
, args
);
1656 case 'r': /* Range type */
1657 type
= read_range_type (pp
, typenums
, objfile
);
1658 if (typenums
[0] != -1)
1659 *dbx_lookup_type (typenums
) = type
;
1664 /* Const and volatile qualified type. */
1665 type
= read_type (pp
, objfile
);
1668 /* Sun ACC builtin int type */
1669 type
= read_sun_builtin_type (pp
, typenums
, objfile
);
1670 if (typenums
[0] != -1)
1671 *dbx_lookup_type (typenums
) = type
;
1675 case 'R': /* Sun ACC builtin float type */
1676 type
= read_sun_floating_type (pp
, typenums
, objfile
);
1677 if (typenums
[0] != -1)
1678 *dbx_lookup_type (typenums
) = type
;
1681 case 'e': /* Enumeration type */
1682 type
= dbx_alloc_type (typenums
, objfile
);
1683 type
= read_enum_type (pp
, type
, objfile
);
1684 if (typenums
[0] != -1)
1685 *dbx_lookup_type (typenums
) = type
;
1688 case 's': /* Struct type */
1689 case 'u': /* Union type */
1690 type
= dbx_alloc_type (typenums
, objfile
);
1691 if (!TYPE_NAME (type
))
1693 TYPE_NAME (type
) = type_synonym_name
;
1695 type_synonym_name
= NULL
;
1696 switch (type_descriptor
)
1699 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
1702 TYPE_CODE (type
) = TYPE_CODE_UNION
;
1705 type
= read_struct_type (pp
, type
, objfile
);
1708 case 'a': /* Array type */
1710 return error_type (pp
);
1713 type
= dbx_alloc_type (typenums
, objfile
);
1714 type
= read_array_type (pp
, type
, objfile
);
1716 TYPE_CODE (type
) = TYPE_CODE_STRING
;
1720 type1
= read_type (pp
, objfile
);
1721 type
= create_set_type ((struct type
*) NULL
, type1
);
1723 TYPE_CODE (type
) = TYPE_CODE_BITSTRING
;
1724 if (typenums
[0] != -1)
1725 *dbx_lookup_type (typenums
) = type
;
1729 --*pp
; /* Go back to the symbol in error */
1730 /* Particularly important if it was \0! */
1731 return error_type (pp
);
1736 warning ("GDB internal error, type is NULL in stabsread.c\n");
1737 return error_type (pp
);
1740 /* Size specified in a type attribute overrides any other size. */
1741 if (type_size
!= -1)
1742 TYPE_LENGTH (type
) = (type_size
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
1747 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
1748 Return the proper type node for a given builtin type number. */
1750 static struct type
*
1751 rs6000_builtin_type (typenum
)
1754 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
1755 #define NUMBER_RECOGNIZED 30
1756 /* This includes an empty slot for type number -0. */
1757 static struct type
*negative_types
[NUMBER_RECOGNIZED
+ 1];
1758 struct type
*rettype
= NULL
;
1760 if (typenum
>= 0 || typenum
< -NUMBER_RECOGNIZED
)
1762 complain (&rs6000_builtin_complaint
, typenum
);
1763 return builtin_type_error
;
1765 if (negative_types
[-typenum
] != NULL
)
1766 return negative_types
[-typenum
];
1768 #if TARGET_CHAR_BIT != 8
1769 #error This code wrong for TARGET_CHAR_BIT not 8
1770 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
1771 that if that ever becomes not true, the correct fix will be to
1772 make the size in the struct type to be in bits, not in units of
1779 /* The size of this and all the other types are fixed, defined
1780 by the debugging format. If there is a type called "int" which
1781 is other than 32 bits, then it should use a new negative type
1782 number (or avoid negative type numbers for that case).
1783 See stabs.texinfo. */
1784 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "int", NULL
);
1787 rettype
= init_type (TYPE_CODE_INT
, 1, 0, "char", NULL
);
1790 rettype
= init_type (TYPE_CODE_INT
, 2, 0, "short", NULL
);
1793 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "long", NULL
);
1796 rettype
= init_type (TYPE_CODE_INT
, 1, TYPE_FLAG_UNSIGNED
,
1797 "unsigned char", NULL
);
1800 rettype
= init_type (TYPE_CODE_INT
, 1, 0, "signed char", NULL
);
1803 rettype
= init_type (TYPE_CODE_INT
, 2, TYPE_FLAG_UNSIGNED
,
1804 "unsigned short", NULL
);
1807 rettype
= init_type (TYPE_CODE_INT
, 4, TYPE_FLAG_UNSIGNED
,
1808 "unsigned int", NULL
);
1811 rettype
= init_type (TYPE_CODE_INT
, 4, TYPE_FLAG_UNSIGNED
,
1814 rettype
= init_type (TYPE_CODE_INT
, 4, TYPE_FLAG_UNSIGNED
,
1815 "unsigned long", NULL
);
1818 rettype
= init_type (TYPE_CODE_VOID
, 1, 0, "void", NULL
);
1821 /* IEEE single precision (32 bit). */
1822 rettype
= init_type (TYPE_CODE_FLT
, 4, 0, "float", NULL
);
1825 /* IEEE double precision (64 bit). */
1826 rettype
= init_type (TYPE_CODE_FLT
, 8, 0, "double", NULL
);
1829 /* This is an IEEE double on the RS/6000, and different machines with
1830 different sizes for "long double" should use different negative
1831 type numbers. See stabs.texinfo. */
1832 rettype
= init_type (TYPE_CODE_FLT
, 8, 0, "long double", NULL
);
1835 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "integer", NULL
);
1838 rettype
= init_type (TYPE_CODE_BOOL
, 4, 0, "boolean", NULL
);
1841 rettype
= init_type (TYPE_CODE_FLT
, 4, 0, "short real", NULL
);
1844 rettype
= init_type (TYPE_CODE_FLT
, 8, 0, "real", NULL
);
1847 rettype
= init_type (TYPE_CODE_ERROR
, 0, 0, "stringptr", NULL
);
1850 rettype
= init_type (TYPE_CODE_CHAR
, 1, TYPE_FLAG_UNSIGNED
,
1854 rettype
= init_type (TYPE_CODE_BOOL
, 1, TYPE_FLAG_UNSIGNED
,
1858 rettype
= init_type (TYPE_CODE_BOOL
, 2, TYPE_FLAG_UNSIGNED
,
1862 rettype
= init_type (TYPE_CODE_BOOL
, 4, TYPE_FLAG_UNSIGNED
,
1866 rettype
= init_type (TYPE_CODE_BOOL
, 4, TYPE_FLAG_UNSIGNED
,
1870 /* Complex type consisting of two IEEE single precision values. */
1871 rettype
= init_type (TYPE_CODE_ERROR
, 8, 0, "complex", NULL
);
1874 /* Complex type consisting of two IEEE double precision values. */
1875 rettype
= init_type (TYPE_CODE_ERROR
, 16, 0, "double complex", NULL
);
1878 rettype
= init_type (TYPE_CODE_INT
, 1, 0, "integer*1", NULL
);
1881 rettype
= init_type (TYPE_CODE_INT
, 2, 0, "integer*2", NULL
);
1884 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "integer*4", NULL
);
1887 rettype
= init_type (TYPE_CODE_CHAR
, 2, 0, "wchar", NULL
);
1890 negative_types
[-typenum
] = rettype
;
1894 /* This page contains subroutines of read_type. */
1896 #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */
1897 #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */
1898 #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */
1899 #define VISIBILITY_IGNORE '9' /* Optimized out or zero length */
1901 /* Read member function stabs info for C++ classes. The form of each member
1904 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
1906 An example with two member functions is:
1908 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
1910 For the case of overloaded operators, the format is op$::*.funcs, where
1911 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
1912 name (such as `+=') and `.' marks the end of the operator name.
1914 Returns 1 for success, 0 for failure. */
1917 read_member_functions (fip
, pp
, type
, objfile
)
1918 struct field_info
*fip
;
1921 struct objfile
*objfile
;
1925 /* Total number of member functions defined in this class. If the class
1926 defines two `f' functions, and one `g' function, then this will have
1928 int total_length
= 0;
1932 struct next_fnfield
*next
;
1933 struct fn_field fn_field
;
1935 struct type
*look_ahead_type
;
1936 struct next_fnfieldlist
*new_fnlist
;
1937 struct next_fnfield
*new_sublist
;
1941 /* Process each list until we find something that is not a member function
1942 or find the end of the functions. */
1946 /* We should be positioned at the start of the function name.
1947 Scan forward to find the first ':' and if it is not the
1948 first of a "::" delimiter, then this is not a member function. */
1960 look_ahead_type
= NULL
;
1963 new_fnlist
= (struct next_fnfieldlist
*)
1964 xmalloc (sizeof (struct next_fnfieldlist
));
1965 make_cleanup (free
, new_fnlist
);
1966 memset (new_fnlist
, 0, sizeof (struct next_fnfieldlist
));
1968 if ((*pp
)[0] == 'o' && (*pp
)[1] == 'p' && (*pp
)[2] == CPLUS_MARKER
)
1970 /* This is a completely wierd case. In order to stuff in the
1971 names that might contain colons (the usual name delimiter),
1972 Mike Tiemann defined a different name format which is
1973 signalled if the identifier is "op$". In that case, the
1974 format is "op$::XXXX." where XXXX is the name. This is
1975 used for names like "+" or "=". YUUUUUUUK! FIXME! */
1976 /* This lets the user type "break operator+".
1977 We could just put in "+" as the name, but that wouldn't
1979 static char opname
[32] = {'o', 'p', CPLUS_MARKER
};
1980 char *o
= opname
+ 3;
1982 /* Skip past '::'. */
1985 STABS_CONTINUE (pp
);
1991 main_fn_name
= savestring (opname
, o
- opname
);
1997 main_fn_name
= savestring (*pp
, p
- *pp
);
1998 /* Skip past '::'. */
2001 new_fnlist
-> fn_fieldlist
.name
= main_fn_name
;
2006 (struct next_fnfield
*) xmalloc (sizeof (struct next_fnfield
));
2007 make_cleanup (free
, new_sublist
);
2008 memset (new_sublist
, 0, sizeof (struct next_fnfield
));
2010 /* Check for and handle cretinous dbx symbol name continuation! */
2011 if (look_ahead_type
== NULL
)
2014 STABS_CONTINUE (pp
);
2016 new_sublist
-> fn_field
.type
= read_type (pp
, objfile
);
2019 /* Invalid symtab info for member function. */
2025 /* g++ version 1 kludge */
2026 new_sublist
-> fn_field
.type
= look_ahead_type
;
2027 look_ahead_type
= NULL
;
2037 /* If this is just a stub, then we don't have the real name here. */
2039 if (TYPE_FLAGS (new_sublist
-> fn_field
.type
) & TYPE_FLAG_STUB
)
2041 if (!TYPE_DOMAIN_TYPE (new_sublist
-> fn_field
.type
))
2042 TYPE_DOMAIN_TYPE (new_sublist
-> fn_field
.type
) = type
;
2043 new_sublist
-> fn_field
.is_stub
= 1;
2045 new_sublist
-> fn_field
.physname
= savestring (*pp
, p
- *pp
);
2048 /* Set this member function's visibility fields. */
2051 case VISIBILITY_PRIVATE
:
2052 new_sublist
-> fn_field
.is_private
= 1;
2054 case VISIBILITY_PROTECTED
:
2055 new_sublist
-> fn_field
.is_protected
= 1;
2059 STABS_CONTINUE (pp
);
2062 case 'A': /* Normal functions. */
2063 new_sublist
-> fn_field
.is_const
= 0;
2064 new_sublist
-> fn_field
.is_volatile
= 0;
2067 case 'B': /* `const' member functions. */
2068 new_sublist
-> fn_field
.is_const
= 1;
2069 new_sublist
-> fn_field
.is_volatile
= 0;
2072 case 'C': /* `volatile' member function. */
2073 new_sublist
-> fn_field
.is_const
= 0;
2074 new_sublist
-> fn_field
.is_volatile
= 1;
2077 case 'D': /* `const volatile' member function. */
2078 new_sublist
-> fn_field
.is_const
= 1;
2079 new_sublist
-> fn_field
.is_volatile
= 1;
2082 case '*': /* File compiled with g++ version 1 -- no info */
2087 complain (&const_vol_complaint
, **pp
);
2096 /* virtual member function, followed by index.
2097 The sign bit is set to distinguish pointers-to-methods
2098 from virtual function indicies. Since the array is
2099 in words, the quantity must be shifted left by 1
2100 on 16 bit machine, and by 2 on 32 bit machine, forcing
2101 the sign bit out, and usable as a valid index into
2102 the array. Remove the sign bit here. */
2103 new_sublist
-> fn_field
.voffset
=
2104 (0x7fffffff & read_huge_number (pp
, ';', &nbits
)) + 2;
2108 STABS_CONTINUE (pp
);
2109 if (**pp
== ';' || **pp
== '\0')
2111 /* Must be g++ version 1. */
2112 new_sublist
-> fn_field
.fcontext
= 0;
2116 /* Figure out from whence this virtual function came.
2117 It may belong to virtual function table of
2118 one of its baseclasses. */
2119 look_ahead_type
= read_type (pp
, objfile
);
2122 /* g++ version 1 overloaded methods. */
2126 new_sublist
-> fn_field
.fcontext
= look_ahead_type
;
2135 look_ahead_type
= NULL
;
2141 /* static member function. */
2142 new_sublist
-> fn_field
.voffset
= VOFFSET_STATIC
;
2143 if (strncmp (new_sublist
-> fn_field
.physname
,
2144 main_fn_name
, strlen (main_fn_name
)))
2146 new_sublist
-> fn_field
.is_stub
= 1;
2152 complain (&member_fn_complaint
, (*pp
)[-1]);
2153 /* Fall through into normal member function. */
2156 /* normal member function. */
2157 new_sublist
-> fn_field
.voffset
= 0;
2158 new_sublist
-> fn_field
.fcontext
= 0;
2162 new_sublist
-> next
= sublist
;
2163 sublist
= new_sublist
;
2165 STABS_CONTINUE (pp
);
2167 while (**pp
!= ';' && **pp
!= '\0');
2171 new_fnlist
-> fn_fieldlist
.fn_fields
= (struct fn_field
*)
2172 obstack_alloc (&objfile
-> type_obstack
,
2173 sizeof (struct fn_field
) * length
);
2174 memset (new_fnlist
-> fn_fieldlist
.fn_fields
, 0,
2175 sizeof (struct fn_field
) * length
);
2176 for (i
= length
; (i
--, sublist
); sublist
= sublist
-> next
)
2178 new_fnlist
-> fn_fieldlist
.fn_fields
[i
] = sublist
-> fn_field
;
2181 new_fnlist
-> fn_fieldlist
.length
= length
;
2182 new_fnlist
-> next
= fip
-> fnlist
;
2183 fip
-> fnlist
= new_fnlist
;
2185 total_length
+= length
;
2186 STABS_CONTINUE (pp
);
2191 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2192 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
2193 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * nfn_fields
);
2194 memset (TYPE_FN_FIELDLISTS (type
), 0,
2195 sizeof (struct fn_fieldlist
) * nfn_fields
);
2196 TYPE_NFN_FIELDS (type
) = nfn_fields
;
2197 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
2203 /* Special GNU C++ name.
2205 Returns 1 for success, 0 for failure. "failure" means that we can't
2206 keep parsing and it's time for error_type(). */
2209 read_cpp_abbrev (fip
, pp
, type
, objfile
)
2210 struct field_info
*fip
;
2213 struct objfile
*objfile
;
2218 struct type
*context
;
2228 /* At this point, *pp points to something like "22:23=*22...",
2229 where the type number before the ':' is the "context" and
2230 everything after is a regular type definition. Lookup the
2231 type, find it's name, and construct the field name. */
2233 context
= read_type (pp
, objfile
);
2237 case 'f': /* $vf -- a virtual function table pointer */
2238 fip
->list
->field
.name
=
2239 obconcat (&objfile
->type_obstack
, vptr_name
, "", "");
2242 case 'b': /* $vb -- a virtual bsomethingorother */
2243 name
= type_name_no_tag (context
);
2246 complain (&invalid_cpp_type_complaint
, symnum
);
2249 fip
->list
->field
.name
=
2250 obconcat (&objfile
->type_obstack
, vb_name
, name
, "");
2254 complain (&invalid_cpp_abbrev_complaint
, *pp
);
2255 fip
->list
->field
.name
=
2256 obconcat (&objfile
->type_obstack
,
2257 "INVALID_CPLUSPLUS_ABBREV", "", "");
2261 /* At this point, *pp points to the ':'. Skip it and read the
2267 complain (&invalid_cpp_abbrev_complaint
, *pp
);
2270 fip
->list
->field
.type
= read_type (pp
, objfile
);
2272 (*pp
)++; /* Skip the comma. */
2278 fip
->list
->field
.bitpos
= read_huge_number (pp
, ';', &nbits
);
2282 /* This field is unpacked. */
2283 fip
->list
->field
.bitsize
= 0;
2284 fip
->list
->visibility
= VISIBILITY_PRIVATE
;
2288 complain (&invalid_cpp_abbrev_complaint
, *pp
);
2289 /* We have no idea what syntax an unrecognized abbrev would have, so
2290 better return 0. If we returned 1, we would need to at least advance
2291 *pp to avoid an infinite loop. */
2298 read_one_struct_field (fip
, pp
, p
, type
, objfile
)
2299 struct field_info
*fip
;
2303 struct objfile
*objfile
;
2305 fip
-> list
-> field
.name
=
2306 obsavestring (*pp
, p
- *pp
, &objfile
-> type_obstack
);
2309 /* This means we have a visibility for a field coming. */
2313 fip
-> list
-> visibility
= *(*pp
)++;
2317 /* normal dbx-style format, no explicit visibility */
2318 fip
-> list
-> visibility
= VISIBILITY_PUBLIC
;
2321 fip
-> list
-> field
.type
= read_type (pp
, objfile
);
2326 /* Possible future hook for nested types. */
2329 fip
-> list
-> field
.bitpos
= (long)-2; /* nested type */
2335 /* Static class member. */
2336 fip
-> list
-> field
.bitpos
= (long) -1;
2342 fip
-> list
-> field
.bitsize
= (long) savestring (*pp
, p
- *pp
);
2346 else if (**pp
!= ',')
2348 /* Bad structure-type format. */
2349 complain (&stabs_general_complaint
, "bad structure-type format");
2353 (*pp
)++; /* Skip the comma. */
2357 fip
-> list
-> field
.bitpos
= read_huge_number (pp
, ',', &nbits
);
2360 complain (&stabs_general_complaint
, "bad structure-type format");
2363 fip
-> list
-> field
.bitsize
= read_huge_number (pp
, ';', &nbits
);
2366 complain (&stabs_general_complaint
, "bad structure-type format");
2371 if (fip
-> list
-> field
.bitpos
== 0 && fip
-> list
-> field
.bitsize
== 0)
2373 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2374 it is a field which has been optimized out. The correct stab for
2375 this case is to use VISIBILITY_IGNORE, but that is a recent
2376 invention. (2) It is a 0-size array. For example
2377 union { int num; char str[0]; } foo. Printing "<no value>" for
2378 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2379 will continue to work, and a 0-size array as a whole doesn't
2380 have any contents to print.
2382 I suspect this probably could also happen with gcc -gstabs (not
2383 -gstabs+) for static fields, and perhaps other C++ extensions.
2384 Hopefully few people use -gstabs with gdb, since it is intended
2385 for dbx compatibility. */
2387 /* Ignore this field. */
2388 fip
-> list
-> visibility
= VISIBILITY_IGNORE
;
2392 /* Detect an unpacked field and mark it as such.
2393 dbx gives a bit size for all fields.
2394 Note that forward refs cannot be packed,
2395 and treat enums as if they had the width of ints. */
2397 if (TYPE_CODE (fip
-> list
-> field
.type
) != TYPE_CODE_INT
2398 && TYPE_CODE (fip
-> list
-> field
.type
) != TYPE_CODE_ENUM
)
2400 fip
-> list
-> field
.bitsize
= 0;
2402 if ((fip
-> list
-> field
.bitsize
2403 == TARGET_CHAR_BIT
* TYPE_LENGTH (fip
-> list
-> field
.type
)
2404 || (TYPE_CODE (fip
-> list
-> field
.type
) == TYPE_CODE_ENUM
2405 && (fip
-> list
-> field
.bitsize
2410 fip
-> list
-> field
.bitpos
% 8 == 0)
2412 fip
-> list
-> field
.bitsize
= 0;
2418 /* Read struct or class data fields. They have the form:
2420 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2422 At the end, we see a semicolon instead of a field.
2424 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2427 The optional VISIBILITY is one of:
2429 '/0' (VISIBILITY_PRIVATE)
2430 '/1' (VISIBILITY_PROTECTED)
2431 '/2' (VISIBILITY_PUBLIC)
2432 '/9' (VISIBILITY_IGNORE)
2434 or nothing, for C style fields with public visibility.
2436 Returns 1 for success, 0 for failure. */
2439 read_struct_fields (fip
, pp
, type
, objfile
)
2440 struct field_info
*fip
;
2443 struct objfile
*objfile
;
2446 struct nextfield
*new;
2448 /* We better set p right now, in case there are no fields at all... */
2452 /* Read each data member type until we find the terminating ';' at the end of
2453 the data member list, or break for some other reason such as finding the
2454 start of the member function list. */
2458 if (os9k_stabs
&& **pp
== ',') break;
2459 STABS_CONTINUE (pp
);
2460 /* Get space to record the next field's data. */
2461 new = (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
2462 make_cleanup (free
, new);
2463 memset (new, 0, sizeof (struct nextfield
));
2464 new -> next
= fip
-> list
;
2467 /* Get the field name. */
2470 /* If is starts with CPLUS_MARKER it is a special abbreviation,
2471 unless the CPLUS_MARKER is followed by an underscore, in
2472 which case it is just the name of an anonymous type, which we
2473 should handle like any other type name. We accept either '$'
2474 or '.', because a field name can never contain one of these
2475 characters except as a CPLUS_MARKER (we probably should be
2476 doing that in most parts of GDB). */
2478 if ((*p
== '$' || *p
== '.') && p
[1] != '_')
2480 if (!read_cpp_abbrev (fip
, pp
, type
, objfile
))
2485 /* Look for the ':' that separates the field name from the field
2486 values. Data members are delimited by a single ':', while member
2487 functions are delimited by a pair of ':'s. When we hit the member
2488 functions (if any), terminate scan loop and return. */
2490 while (*p
!= ':' && *p
!= '\0')
2497 /* Check to see if we have hit the member functions yet. */
2502 read_one_struct_field (fip
, pp
, p
, type
, objfile
);
2504 if (p
[0] == ':' && p
[1] == ':')
2506 /* chill the list of fields: the last entry (at the head) is a
2507 partially constructed entry which we now scrub. */
2508 fip
-> list
= fip
-> list
-> next
;
2513 /* The stabs for C++ derived classes contain baseclass information which
2514 is marked by a '!' character after the total size. This function is
2515 called when we encounter the baseclass marker, and slurps up all the
2516 baseclass information.
2518 Immediately following the '!' marker is the number of base classes that
2519 the class is derived from, followed by information for each base class.
2520 For each base class, there are two visibility specifiers, a bit offset
2521 to the base class information within the derived class, a reference to
2522 the type for the base class, and a terminating semicolon.
2524 A typical example, with two base classes, would be "!2,020,19;0264,21;".
2526 Baseclass information marker __________________|| | | | | | |
2527 Number of baseclasses __________________________| | | | | | |
2528 Visibility specifiers (2) ________________________| | | | | |
2529 Offset in bits from start of class _________________| | | | |
2530 Type number for base class ___________________________| | | |
2531 Visibility specifiers (2) _______________________________| | |
2532 Offset in bits from start of class ________________________| |
2533 Type number of base class ____________________________________|
2535 Return 1 for success, 0 for (error-type-inducing) failure. */
2538 read_baseclasses (fip
, pp
, type
, objfile
)
2539 struct field_info
*fip
;
2542 struct objfile
*objfile
;
2545 struct nextfield
*new;
2553 /* Skip the '!' baseclass information marker. */
2557 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2560 TYPE_N_BASECLASSES (type
) = read_huge_number (pp
, ',', &nbits
);
2566 /* Some stupid compilers have trouble with the following, so break
2567 it up into simpler expressions. */
2568 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*)
2569 TYPE_ALLOC (type
, B_BYTES (TYPE_N_BASECLASSES (type
)));
2572 int num_bytes
= B_BYTES (TYPE_N_BASECLASSES (type
));
2575 pointer
= (char *) TYPE_ALLOC (type
, num_bytes
);
2576 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*) pointer
;
2580 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), TYPE_N_BASECLASSES (type
));
2582 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
2584 new = (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
2585 make_cleanup (free
, new);
2586 memset (new, 0, sizeof (struct nextfield
));
2587 new -> next
= fip
-> list
;
2589 new -> field
.bitsize
= 0; /* this should be an unpacked field! */
2591 STABS_CONTINUE (pp
);
2595 /* Nothing to do. */
2598 SET_TYPE_FIELD_VIRTUAL (type
, i
);
2601 /* Unknown character. Complain and treat it as non-virtual. */
2603 static struct complaint msg
= {
2604 "Unknown virtual character `%c' for baseclass", 0, 0};
2605 complain (&msg
, **pp
);
2610 new -> visibility
= *(*pp
)++;
2611 switch (new -> visibility
)
2613 case VISIBILITY_PRIVATE
:
2614 case VISIBILITY_PROTECTED
:
2615 case VISIBILITY_PUBLIC
:
2618 /* Bad visibility format. Complain and treat it as
2621 static struct complaint msg
= {
2622 "Unknown visibility `%c' for baseclass", 0, 0};
2623 complain (&msg
, new -> visibility
);
2624 new -> visibility
= VISIBILITY_PUBLIC
;
2631 /* The remaining value is the bit offset of the portion of the object
2632 corresponding to this baseclass. Always zero in the absence of
2633 multiple inheritance. */
2635 new -> field
.bitpos
= read_huge_number (pp
, ',', &nbits
);
2640 /* The last piece of baseclass information is the type of the
2641 base class. Read it, and remember it's type name as this
2644 new -> field
.type
= read_type (pp
, objfile
);
2645 new -> field
.name
= type_name_no_tag (new -> field
.type
);
2647 /* skip trailing ';' and bump count of number of fields seen */
2656 /* The tail end of stabs for C++ classes that contain a virtual function
2657 pointer contains a tilde, a %, and a type number.
2658 The type number refers to the base class (possibly this class itself) which
2659 contains the vtable pointer for the current class.
2661 This function is called when we have parsed all the method declarations,
2662 so we can look for the vptr base class info. */
2665 read_tilde_fields (fip
, pp
, type
, objfile
)
2666 struct field_info
*fip
;
2669 struct objfile
*objfile
;
2673 STABS_CONTINUE (pp
);
2675 /* If we are positioned at a ';', then skip it. */
2685 if (**pp
== '=' || **pp
== '+' || **pp
== '-')
2687 /* Obsolete flags that used to indicate the presence
2688 of constructors and/or destructors. */
2692 /* Read either a '%' or the final ';'. */
2693 if (*(*pp
)++ == '%')
2695 /* The next number is the type number of the base class
2696 (possibly our own class) which supplies the vtable for
2697 this class. Parse it out, and search that class to find
2698 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
2699 and TYPE_VPTR_FIELDNO. */
2704 t
= read_type (pp
, objfile
);
2706 while (*p
!= '\0' && *p
!= ';')
2712 /* Premature end of symbol. */
2716 TYPE_VPTR_BASETYPE (type
) = t
;
2717 if (type
== t
) /* Our own class provides vtbl ptr */
2719 for (i
= TYPE_NFIELDS (t
) - 1;
2720 i
>= TYPE_N_BASECLASSES (t
);
2723 if (! strncmp (TYPE_FIELD_NAME (t
, i
), vptr_name
,
2724 sizeof (vptr_name
) - 1))
2726 TYPE_VPTR_FIELDNO (type
) = i
;
2730 /* Virtual function table field not found. */
2731 complain (&vtbl_notfound_complaint
, TYPE_NAME (type
));
2736 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
2747 attach_fn_fields_to_type (fip
, type
)
2748 struct field_info
*fip
;
2749 register struct type
*type
;
2753 for (n
= 0; n
< TYPE_N_BASECLASSES (type
); n
++)
2755 if (TYPE_CODE (TYPE_BASECLASS (type
, n
)) == TYPE_CODE_UNDEF
)
2757 /* @@ Memory leak on objfile -> type_obstack? */
2760 TYPE_NFN_FIELDS_TOTAL (type
) +=
2761 TYPE_NFN_FIELDS_TOTAL (TYPE_BASECLASS (type
, n
));
2764 for (n
= TYPE_NFN_FIELDS (type
);
2765 fip
-> fnlist
!= NULL
;
2766 fip
-> fnlist
= fip
-> fnlist
-> next
)
2768 --n
; /* Circumvent Sun3 compiler bug */
2769 TYPE_FN_FIELDLISTS (type
)[n
] = fip
-> fnlist
-> fn_fieldlist
;
2774 /* Create the vector of fields, and record how big it is.
2775 We need this info to record proper virtual function table information
2776 for this class's virtual functions. */
2779 attach_fields_to_type (fip
, type
, objfile
)
2780 struct field_info
*fip
;
2781 register struct type
*type
;
2782 struct objfile
*objfile
;
2784 register int nfields
= 0;
2785 register int non_public_fields
= 0;
2786 register struct nextfield
*scan
;
2788 /* Count up the number of fields that we have, as well as taking note of
2789 whether or not there are any non-public fields, which requires us to
2790 allocate and build the private_field_bits and protected_field_bits
2793 for (scan
= fip
-> list
; scan
!= NULL
; scan
= scan
-> next
)
2796 if (scan
-> visibility
!= VISIBILITY_PUBLIC
)
2798 non_public_fields
++;
2802 /* Now we know how many fields there are, and whether or not there are any
2803 non-public fields. Record the field count, allocate space for the
2804 array of fields, and create blank visibility bitfields if necessary. */
2806 TYPE_NFIELDS (type
) = nfields
;
2807 TYPE_FIELDS (type
) = (struct field
*)
2808 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
2809 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
2811 if (non_public_fields
)
2813 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2815 TYPE_FIELD_PRIVATE_BITS (type
) =
2816 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
2817 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
2819 TYPE_FIELD_PROTECTED_BITS (type
) =
2820 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
2821 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
2823 TYPE_FIELD_IGNORE_BITS (type
) =
2824 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
2825 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
2828 /* Copy the saved-up fields into the field vector. Start from the head
2829 of the list, adding to the tail of the field array, so that they end
2830 up in the same order in the array in which they were added to the list. */
2832 while (nfields
-- > 0)
2834 TYPE_FIELD (type
, nfields
) = fip
-> list
-> field
;
2835 switch (fip
-> list
-> visibility
)
2837 case VISIBILITY_PRIVATE
:
2838 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
2841 case VISIBILITY_PROTECTED
:
2842 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
2845 case VISIBILITY_IGNORE
:
2846 SET_TYPE_FIELD_IGNORE (type
, nfields
);
2849 case VISIBILITY_PUBLIC
:
2853 /* Unknown visibility. Complain and treat it as public. */
2855 static struct complaint msg
= {
2856 "Unknown visibility `%c' for field", 0, 0};
2857 complain (&msg
, fip
-> list
-> visibility
);
2861 fip
-> list
= fip
-> list
-> next
;
2866 /* Read the description of a structure (or union type) and return an object
2867 describing the type.
2869 PP points to a character pointer that points to the next unconsumed token
2870 in the the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
2871 *PP will point to "4a:1,0,32;;".
2873 TYPE points to an incomplete type that needs to be filled in.
2875 OBJFILE points to the current objfile from which the stabs information is
2876 being read. (Note that it is redundant in that TYPE also contains a pointer
2877 to this same objfile, so it might be a good idea to eliminate it. FIXME).
2880 static struct type
*
2881 read_struct_type (pp
, type
, objfile
)
2884 struct objfile
*objfile
;
2886 struct cleanup
*back_to
;
2887 struct field_info fi
;
2892 back_to
= make_cleanup (null_cleanup
, 0);
2894 INIT_CPLUS_SPECIFIC (type
);
2895 TYPE_FLAGS (type
) &= ~TYPE_FLAG_STUB
;
2897 /* First comes the total size in bytes. */
2901 TYPE_LENGTH (type
) = read_huge_number (pp
, 0, &nbits
);
2903 return error_type (pp
);
2906 /* Now read the baseclasses, if any, read the regular C struct or C++
2907 class member fields, attach the fields to the type, read the C++
2908 member functions, attach them to the type, and then read any tilde
2909 field (baseclass specifier for the class holding the main vtable). */
2911 if (!read_baseclasses (&fi
, pp
, type
, objfile
)
2912 || !read_struct_fields (&fi
, pp
, type
, objfile
)
2913 || !attach_fields_to_type (&fi
, type
, objfile
)
2914 || !read_member_functions (&fi
, pp
, type
, objfile
)
2915 || !attach_fn_fields_to_type (&fi
, type
)
2916 || !read_tilde_fields (&fi
, pp
, type
, objfile
))
2918 do_cleanups (back_to
);
2919 return (error_type (pp
));
2922 do_cleanups (back_to
);
2926 /* Read a definition of an array type,
2927 and create and return a suitable type object.
2928 Also creates a range type which represents the bounds of that
2931 static struct type
*
2932 read_array_type (pp
, type
, objfile
)
2934 register struct type
*type
;
2935 struct objfile
*objfile
;
2937 struct type
*index_type
, *element_type
, *range_type
;
2942 /* Format of an array type:
2943 "ar<index type>;lower;upper;<array_contents_type>".
2944 OS9000: "arlower,upper;<array_contents_type>".
2946 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
2947 for these, produce a type like float[][]. */
2950 index_type
= builtin_type_int
;
2953 index_type
= read_type (pp
, objfile
);
2955 /* Improper format of array type decl. */
2956 return error_type (pp
);
2960 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
2965 lower
= read_huge_number (pp
, os9k_stabs
? ',' : ';', &nbits
);
2967 return error_type (pp
);
2969 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
2974 upper
= read_huge_number (pp
, ';', &nbits
);
2976 return error_type (pp
);
2978 element_type
= read_type (pp
, objfile
);
2987 create_range_type ((struct type
*) NULL
, index_type
, lower
, upper
);
2988 type
= create_array_type (type
, element_type
, range_type
);
2990 /* If we have an array whose element type is not yet known, but whose
2991 bounds *are* known, record it to be adjusted at the end of the file. */
2992 /* FIXME: Why check for zero length rather than TYPE_FLAG_STUB? I think
2993 the two have the same effect except that the latter is cleaner and the
2994 former would be wrong for types which really are zero-length (if we
2997 if (TYPE_LENGTH (element_type
) == 0 && !adjustable
)
2999 TYPE_FLAGS (type
) |= TYPE_FLAG_TARGET_STUB
;
3000 add_undefined_type (type
);
3007 /* Read a definition of an enumeration type,
3008 and create and return a suitable type object.
3009 Also defines the symbols that represent the values of the type. */
3011 static struct type
*
3012 read_enum_type (pp
, type
, objfile
)
3014 register struct type
*type
;
3015 struct objfile
*objfile
;
3020 register struct symbol
*sym
;
3022 struct pending
**symlist
;
3023 struct pending
*osyms
, *syms
;
3028 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3029 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3030 to do? For now, force all enum values to file scope. */
3031 if (within_function
)
3032 symlist
= &local_symbols
;
3035 symlist
= &file_symbols
;
3037 o_nsyms
= osyms
? osyms
->nsyms
: 0;
3041 /* Size. Perhaps this does not have to be conditionalized on
3042 os9k_stabs (assuming the name of an enum constant can't start
3044 read_huge_number (pp
, 0, &nbits
);
3046 return error_type (pp
);
3049 /* Read the value-names and their values.
3050 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3051 A semicolon or comma instead of a NAME means the end. */
3052 while (**pp
&& **pp
!= ';' && **pp
!= ',')
3054 STABS_CONTINUE (pp
);
3056 while (*p
!= ':') p
++;
3057 name
= obsavestring (*pp
, p
- *pp
, &objfile
-> symbol_obstack
);
3059 n
= read_huge_number (pp
, ',', &nbits
);
3061 return error_type (pp
);
3063 sym
= (struct symbol
*)
3064 obstack_alloc (&objfile
-> symbol_obstack
, sizeof (struct symbol
));
3065 memset (sym
, 0, sizeof (struct symbol
));
3066 SYMBOL_NAME (sym
) = name
;
3067 SYMBOL_LANGUAGE (sym
) = current_subfile
-> language
;
3068 SYMBOL_CLASS (sym
) = LOC_CONST
;
3069 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
3070 SYMBOL_VALUE (sym
) = n
;
3071 add_symbol_to_list (sym
, symlist
);
3076 (*pp
)++; /* Skip the semicolon. */
3078 /* Now fill in the fields of the type-structure. */
3080 TYPE_LENGTH (type
) = TARGET_INT_BIT
/ HOST_CHAR_BIT
;
3081 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
3082 TYPE_FLAGS (type
) &= ~TYPE_FLAG_STUB
;
3083 TYPE_NFIELDS (type
) = nsyms
;
3084 TYPE_FIELDS (type
) = (struct field
*)
3085 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
);
3086 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nsyms
);
3088 /* Find the symbols for the values and put them into the type.
3089 The symbols can be found in the symlist that we put them on
3090 to cause them to be defined. osyms contains the old value
3091 of that symlist; everything up to there was defined by us. */
3092 /* Note that we preserve the order of the enum constants, so
3093 that in something like "enum {FOO, LAST_THING=FOO}" we print
3094 FOO, not LAST_THING. */
3096 for (syms
= *symlist
, n
= 0; syms
; syms
= syms
->next
)
3101 for (; j
< syms
->nsyms
; j
++,n
++)
3103 struct symbol
*xsym
= syms
->symbol
[j
];
3104 SYMBOL_TYPE (xsym
) = type
;
3105 TYPE_FIELD_NAME (type
, n
) = SYMBOL_NAME (xsym
);
3106 TYPE_FIELD_VALUE (type
, n
) = 0;
3107 TYPE_FIELD_BITPOS (type
, n
) = SYMBOL_VALUE (xsym
);
3108 TYPE_FIELD_BITSIZE (type
, n
) = 0;
3117 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3118 typedefs in every file (for int, long, etc):
3120 type = b <signed> <width>; <offset>; <nbits>
3121 signed = u or s. Possible c in addition to u or s (for char?).
3122 offset = offset from high order bit to start bit of type.
3123 width is # bytes in object of this type, nbits is # bits in type.
3125 The width/offset stuff appears to be for small objects stored in
3126 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3129 static struct type
*
3130 read_sun_builtin_type (pp
, typenums
, objfile
)
3133 struct objfile
*objfile
;
3148 return error_type (pp
);
3152 /* For some odd reason, all forms of char put a c here. This is strange
3153 because no other type has this honor. We can safely ignore this because
3154 we actually determine 'char'acterness by the number of bits specified in
3160 /* The first number appears to be the number of bytes occupied
3161 by this type, except that unsigned short is 4 instead of 2.
3162 Since this information is redundant with the third number,
3163 we will ignore it. */
3164 read_huge_number (pp
, ';', &nbits
);
3166 return error_type (pp
);
3168 /* The second number is always 0, so ignore it too. */
3169 read_huge_number (pp
, ';', &nbits
);
3171 return error_type (pp
);
3173 /* The third number is the number of bits for this type. */
3174 type_bits
= read_huge_number (pp
, 0, &nbits
);
3176 return error_type (pp
);
3177 /* The type *should* end with a semicolon. If it are embedded
3178 in a larger type the semicolon may be the only way to know where
3179 the type ends. If this type is at the end of the stabstring we
3180 can deal with the omitted semicolon (but we don't have to like
3181 it). Don't bother to complain(), Sun's compiler omits the semicolon
3187 return init_type (TYPE_CODE_VOID
, 1,
3188 signed_type
? 0 : TYPE_FLAG_UNSIGNED
, (char *)NULL
,
3191 return init_type (TYPE_CODE_INT
,
3192 type_bits
/ TARGET_CHAR_BIT
,
3193 signed_type
? 0 : TYPE_FLAG_UNSIGNED
, (char *)NULL
,
3197 static struct type
*
3198 read_sun_floating_type (pp
, typenums
, objfile
)
3201 struct objfile
*objfile
;
3207 /* The first number has more details about the type, for example
3209 details
= read_huge_number (pp
, ';', &nbits
);
3211 return error_type (pp
);
3213 /* The second number is the number of bytes occupied by this type */
3214 nbytes
= read_huge_number (pp
, ';', &nbits
);
3216 return error_type (pp
);
3218 if (details
== NF_COMPLEX
|| details
== NF_COMPLEX16
3219 || details
== NF_COMPLEX32
)
3220 /* This is a type we can't handle, but we do know the size.
3221 We also will be able to give it a name. */
3222 return init_type (TYPE_CODE_ERROR
, nbytes
, 0, NULL
, objfile
);
3224 return init_type (TYPE_CODE_FLT
, nbytes
, 0, NULL
, objfile
);
3227 /* Read a number from the string pointed to by *PP.
3228 The value of *PP is advanced over the number.
3229 If END is nonzero, the character that ends the
3230 number must match END, or an error happens;
3231 and that character is skipped if it does match.
3232 If END is zero, *PP is left pointing to that character.
3234 If the number fits in a long, set *BITS to 0 and return the value.
3235 If not, set *BITS to be the number of bits in the number and return 0.
3237 If encounter garbage, set *BITS to -1 and return 0. */
3240 read_huge_number (pp
, end
, bits
)
3260 /* Leading zero means octal. GCC uses this to output values larger
3261 than an int (because that would be hard in decimal). */
3269 upper_limit
= ULONG_MAX
/ radix
;
3271 upper_limit
= LONG_MAX
/ radix
;
3273 while ((c
= *p
++) >= '0' && c
< ('0' + radix
))
3275 if (n
<= upper_limit
)
3278 n
+= c
- '0'; /* FIXME this overflows anyway */
3283 /* This depends on large values being output in octal, which is
3290 /* Ignore leading zeroes. */
3294 else if (c
== '2' || c
== '3')
3320 /* Large decimal constants are an error (because it is hard to
3321 count how many bits are in them). */
3327 /* -0x7f is the same as 0x80. So deal with it by adding one to
3328 the number of bits. */
3340 /* It's *BITS which has the interesting information. */
3344 static struct type
*
3345 read_range_type (pp
, typenums
, objfile
)
3348 struct objfile
*objfile
;
3354 struct type
*result_type
;
3355 struct type
*index_type
;
3357 /* First comes a type we are a subrange of.
3358 In C it is usually 0, 1 or the type being defined. */
3359 /* FIXME: according to stabs.texinfo and AIX doc, this can be a type-id
3360 not just a type number. */
3361 if (read_type_number (pp
, rangenums
) != 0)
3362 return error_type (pp
);
3363 self_subrange
= (rangenums
[0] == typenums
[0] &&
3364 rangenums
[1] == typenums
[1]);
3366 /* A semicolon should now follow; skip it. */
3370 /* The remaining two operands are usually lower and upper bounds
3371 of the range. But in some special cases they mean something else. */
3372 n2
= read_huge_number (pp
, ';', &n2bits
);
3373 n3
= read_huge_number (pp
, ';', &n3bits
);
3375 if (n2bits
== -1 || n3bits
== -1)
3376 return error_type (pp
);
3378 /* If limits are huge, must be large integral type. */
3379 if (n2bits
!= 0 || n3bits
!= 0)
3381 char got_signed
= 0;
3382 char got_unsigned
= 0;
3383 /* Number of bits in the type. */
3386 /* Range from 0 to <large number> is an unsigned large integral type. */
3387 if ((n2bits
== 0 && n2
== 0) && n3bits
!= 0)
3392 /* Range from <large number> to <large number>-1 is a large signed
3393 integral type. Take care of the case where <large number> doesn't
3394 fit in a long but <large number>-1 does. */
3395 else if ((n2bits
!= 0 && n3bits
!= 0 && n2bits
== n3bits
+ 1)
3396 || (n2bits
!= 0 && n3bits
== 0
3397 && (n2bits
== sizeof (long) * HOST_CHAR_BIT
)
3404 if (got_signed
|| got_unsigned
)
3406 return init_type (TYPE_CODE_INT
, nbits
/ TARGET_CHAR_BIT
,
3407 got_unsigned
? TYPE_FLAG_UNSIGNED
: 0, NULL
,
3411 return error_type (pp
);
3414 /* A type defined as a subrange of itself, with bounds both 0, is void. */
3415 if (self_subrange
&& n2
== 0 && n3
== 0)
3416 return init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
3418 /* If n3 is zero and n2 is not, we want a floating type,
3419 and n2 is the width in bytes.
3421 Fortran programs appear to use this for complex types also,
3422 and they give no way to distinguish between double and single-complex!
3424 GDB does not have complex types.
3426 Just return the complex as a float of that size. It won't work right
3427 for the complex values, but at least it makes the file loadable. */
3429 if (n3
== 0 && n2
> 0)
3431 return init_type (TYPE_CODE_FLT
, n2
, 0, NULL
, objfile
);
3434 /* If the upper bound is -1, it must really be an unsigned int. */
3436 else if (n2
== 0 && n3
== -1)
3438 /* It is unsigned int or unsigned long. */
3439 /* GCC 2.3.3 uses this for long long too, but that is just a GDB 3.5
3440 compatibility hack. */
3441 return init_type (TYPE_CODE_INT
, TARGET_INT_BIT
/ TARGET_CHAR_BIT
,
3442 TYPE_FLAG_UNSIGNED
, NULL
, objfile
);
3445 /* Special case: char is defined (Who knows why) as a subrange of
3446 itself with range 0-127. */
3447 else if (self_subrange
&& n2
== 0 && n3
== 127)
3448 return init_type (TYPE_CODE_INT
, 1, 0, NULL
, objfile
);
3450 /* We used to do this only for subrange of self or subrange of int. */
3454 /* n3 actually gives the size. */
3455 return init_type (TYPE_CODE_INT
, - n3
, TYPE_FLAG_UNSIGNED
,
3458 return init_type (TYPE_CODE_INT
, 1, TYPE_FLAG_UNSIGNED
, NULL
, objfile
);
3460 return init_type (TYPE_CODE_INT
, 2, TYPE_FLAG_UNSIGNED
, NULL
, objfile
);
3462 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
3463 "unsigned long", and we already checked for that,
3464 so don't need to test for it here. */
3466 /* I think this is for Convex "long long". Since I don't know whether
3467 Convex sets self_subrange, I also accept that particular size regardless
3468 of self_subrange. */
3469 else if (n3
== 0 && n2
< 0
3471 || n2
== - TARGET_LONG_LONG_BIT
/ TARGET_CHAR_BIT
))
3472 return init_type (TYPE_CODE_INT
, - n2
, 0, NULL
, objfile
);
3473 else if (n2
== -n3
-1)
3476 return init_type (TYPE_CODE_INT
, 1, 0, NULL
, objfile
);
3478 return init_type (TYPE_CODE_INT
, 2, 0, NULL
, objfile
);
3479 if (n3
== 0x7fffffff)
3480 return init_type (TYPE_CODE_INT
, 4, 0, NULL
, objfile
);
3483 /* We have a real range type on our hands. Allocate space and
3484 return a real pointer. */
3486 /* At this point I don't have the faintest idea how to deal with
3487 a self_subrange type; I'm going to assume that this is used
3488 as an idiom, and that all of them are special cases. So . . . */
3490 return error_type (pp
);
3492 index_type
= *dbx_lookup_type (rangenums
);
3493 if (index_type
== NULL
)
3495 /* Does this actually ever happen? Is that why we are worrying
3496 about dealing with it rather than just calling error_type? */
3498 static struct type
*range_type_index
;
3500 complain (&range_type_base_complaint
, rangenums
[1]);
3501 if (range_type_index
== NULL
)
3503 init_type (TYPE_CODE_INT
, TARGET_INT_BIT
/ TARGET_CHAR_BIT
,
3504 0, "range type index type", NULL
);
3505 index_type
= range_type_index
;
3508 result_type
= create_range_type ((struct type
*) NULL
, index_type
, n2
, n3
);
3509 return (result_type
);
3512 /* Read in an argument list. This is a list of types, separated by commas
3513 and terminated with END. Return the list of types read in, or (struct type
3514 **)-1 if there is an error. */
3516 static struct type
**
3517 read_args (pp
, end
, objfile
)
3520 struct objfile
*objfile
;
3522 /* FIXME! Remove this arbitrary limit! */
3523 struct type
*types
[1024], **rval
; /* allow for fns of 1023 parameters */
3529 /* Invalid argument list: no ','. */
3530 return (struct type
**)-1;
3532 STABS_CONTINUE (pp
);
3533 types
[n
++] = read_type (pp
, objfile
);
3535 (*pp
)++; /* get past `end' (the ':' character) */
3539 rval
= (struct type
**) xmalloc (2 * sizeof (struct type
*));
3541 else if (TYPE_CODE (types
[n
-1]) != TYPE_CODE_VOID
)
3543 rval
= (struct type
**) xmalloc ((n
+ 1) * sizeof (struct type
*));
3544 memset (rval
+ n
, 0, sizeof (struct type
*));
3548 rval
= (struct type
**) xmalloc (n
* sizeof (struct type
*));
3550 memcpy (rval
, types
, n
* sizeof (struct type
*));
3554 /* Common block handling. */
3556 /* List of symbols declared since the last BCOMM. This list is a tail
3557 of local_symbols. When ECOMM is seen, the symbols on the list
3558 are noted so their proper addresses can be filled in later,
3559 using the common block base address gotten from the assembler
3562 static struct pending
*common_block
;
3563 static int common_block_i
;
3565 /* Name of the current common block. We get it from the BCOMM instead of the
3566 ECOMM to match IBM documentation (even though IBM puts the name both places
3567 like everyone else). */
3568 static char *common_block_name
;
3570 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
3571 to remain after this function returns. */
3574 common_block_start (name
, objfile
)
3576 struct objfile
*objfile
;
3578 if (common_block_name
!= NULL
)
3580 static struct complaint msg
= {
3581 "Invalid symbol data: common block within common block",
3585 common_block
= local_symbols
;
3586 common_block_i
= local_symbols
? local_symbols
->nsyms
: 0;
3587 common_block_name
= obsavestring (name
, strlen (name
),
3588 &objfile
-> symbol_obstack
);
3591 /* Process a N_ECOMM symbol. */
3594 common_block_end (objfile
)
3595 struct objfile
*objfile
;
3597 /* Symbols declared since the BCOMM are to have the common block
3598 start address added in when we know it. common_block and
3599 common_block_i point to the first symbol after the BCOMM in
3600 the local_symbols list; copy the list and hang it off the
3601 symbol for the common block name for later fixup. */
3604 struct pending
*new = 0;
3605 struct pending
*next
;
3608 if (common_block_name
== NULL
)
3610 static struct complaint msg
= {"ECOMM symbol unmatched by BCOMM", 0, 0};
3615 sym
= (struct symbol
*)
3616 obstack_alloc (&objfile
-> symbol_obstack
, sizeof (struct symbol
));
3617 memset (sym
, 0, sizeof (struct symbol
));
3618 SYMBOL_NAME (sym
) = common_block_name
;
3619 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
3621 /* Now we copy all the symbols which have been defined since the BCOMM. */
3623 /* Copy all the struct pendings before common_block. */
3624 for (next
= local_symbols
;
3625 next
!= NULL
&& next
!= common_block
;
3628 for (j
= 0; j
< next
->nsyms
; j
++)
3629 add_symbol_to_list (next
->symbol
[j
], &new);
3632 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
3633 NULL, it means copy all the local symbols (which we already did
3636 if (common_block
!= NULL
)
3637 for (j
= common_block_i
; j
< common_block
->nsyms
; j
++)
3638 add_symbol_to_list (common_block
->symbol
[j
], &new);
3640 SYMBOL_TYPE (sym
) = (struct type
*) new;
3642 /* Should we be putting local_symbols back to what it was?
3645 i
= hashname (SYMBOL_NAME (sym
));
3646 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
3647 global_sym_chain
[i
] = sym
;
3648 common_block_name
= NULL
;
3651 /* Add a common block's start address to the offset of each symbol
3652 declared to be in it (by being between a BCOMM/ECOMM pair that uses
3653 the common block name). */
3656 fix_common_block (sym
, valu
)
3660 struct pending
*next
= (struct pending
*) SYMBOL_TYPE (sym
);
3661 for ( ; next
; next
= next
->next
)
3664 for (j
= next
->nsyms
- 1; j
>= 0; j
--)
3665 SYMBOL_VALUE_ADDRESS (next
->symbol
[j
]) += valu
;
3671 /* What about types defined as forward references inside of a small lexical
3673 /* Add a type to the list of undefined types to be checked through
3674 once this file has been read in. */
3677 add_undefined_type (type
)
3680 if (undef_types_length
== undef_types_allocated
)
3682 undef_types_allocated
*= 2;
3683 undef_types
= (struct type
**)
3684 xrealloc ((char *) undef_types
,
3685 undef_types_allocated
* sizeof (struct type
*));
3687 undef_types
[undef_types_length
++] = type
;
3690 /* Go through each undefined type, see if it's still undefined, and fix it
3691 up if possible. We have two kinds of undefined types:
3693 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
3694 Fix: update array length using the element bounds
3695 and the target type's length.
3696 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
3697 yet defined at the time a pointer to it was made.
3698 Fix: Do a full lookup on the struct/union tag. */
3700 cleanup_undefined_types ()
3704 for (type
= undef_types
; type
< undef_types
+ undef_types_length
; type
++)
3706 switch (TYPE_CODE (*type
))
3709 case TYPE_CODE_STRUCT
:
3710 case TYPE_CODE_UNION
:
3711 case TYPE_CODE_ENUM
:
3713 /* Check if it has been defined since. Need to do this here
3714 as well as in check_stub_type to deal with the (legitimate in
3715 C though not C++) case of several types with the same name
3716 in different source files. */
3717 if (TYPE_FLAGS (*type
) & TYPE_FLAG_STUB
)
3719 struct pending
*ppt
;
3721 /* Name of the type, without "struct" or "union" */
3722 char *typename
= TYPE_TAG_NAME (*type
);
3724 if (typename
== NULL
)
3726 static struct complaint msg
= {"need a type name", 0, 0};
3730 for (ppt
= file_symbols
; ppt
; ppt
= ppt
->next
)
3732 for (i
= 0; i
< ppt
->nsyms
; i
++)
3734 struct symbol
*sym
= ppt
->symbol
[i
];
3736 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
3737 && SYMBOL_NAMESPACE (sym
) == STRUCT_NAMESPACE
3738 && (TYPE_CODE (SYMBOL_TYPE (sym
)) ==
3740 && STREQ (SYMBOL_NAME (sym
), typename
))
3742 memcpy (*type
, SYMBOL_TYPE (sym
),
3743 sizeof (struct type
));
3751 case TYPE_CODE_ARRAY
:
3753 /* This is a kludge which is here for historical reasons
3754 because I suspect that check_stub_type does not get
3755 called everywhere it needs to be called for arrays. Even
3756 with this kludge, those places are broken for the case
3757 where the stub type is defined in another compilation
3758 unit, but this kludge at least deals with it for the case
3759 in which it is the same compilation unit.
3761 Don't try to do this by calling check_stub_type; it might
3762 cause symbols to be read in lookup_symbol, and the symbol
3763 reader is not reentrant. */
3765 struct type
*range_type
;
3768 if (TYPE_LENGTH (*type
) != 0) /* Better be unknown */
3770 if (TYPE_NFIELDS (*type
) != 1)
3772 range_type
= TYPE_FIELD_TYPE (*type
, 0);
3773 if (TYPE_CODE (range_type
) != TYPE_CODE_RANGE
)
3776 /* Now recompute the length of the array type, based on its
3777 number of elements and the target type's length. */
3778 lower
= TYPE_FIELD_BITPOS (range_type
, 0);
3779 upper
= TYPE_FIELD_BITPOS (range_type
, 1);
3780 TYPE_LENGTH (*type
) = (upper
- lower
+ 1)
3781 * TYPE_LENGTH (TYPE_TARGET_TYPE (*type
));
3783 /* If the target type is not a stub, we could be clearing
3784 TYPE_FLAG_TARGET_STUB for *type. */
3791 static struct complaint msg
= {"\
3792 GDB internal error. cleanup_undefined_types with bad type %d.", 0, 0};
3793 complain (&msg
, TYPE_CODE (*type
));
3799 undef_types_length
= 0;
3802 /* Scan through all of the global symbols defined in the object file,
3803 assigning values to the debugging symbols that need to be assigned
3804 to. Get these symbols from the minimal symbol table. */
3807 scan_file_globals (objfile
)
3808 struct objfile
*objfile
;
3811 struct minimal_symbol
*msymbol
;
3812 struct symbol
*sym
, *prev
;
3814 if (objfile
->msymbols
== 0) /* Beware the null file. */
3817 for (msymbol
= objfile
-> msymbols
; SYMBOL_NAME (msymbol
) != NULL
; msymbol
++)
3823 /* Get the hash index and check all the symbols
3824 under that hash index. */
3826 hash
= hashname (SYMBOL_NAME (msymbol
));
3828 for (sym
= global_sym_chain
[hash
]; sym
;)
3830 if (SYMBOL_NAME (msymbol
)[0] == SYMBOL_NAME (sym
)[0] &&
3831 STREQ(SYMBOL_NAME (msymbol
) + 1, SYMBOL_NAME (sym
) + 1))
3833 /* Splice this symbol out of the hash chain and
3834 assign the value we have to it. */
3837 SYMBOL_VALUE_CHAIN (prev
) = SYMBOL_VALUE_CHAIN (sym
);
3841 global_sym_chain
[hash
] = SYMBOL_VALUE_CHAIN (sym
);
3844 /* Check to see whether we need to fix up a common block. */
3845 /* Note: this code might be executed several times for
3846 the same symbol if there are multiple references. */
3848 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
3850 fix_common_block (sym
, SYMBOL_VALUE_ADDRESS (msymbol
));
3854 SYMBOL_VALUE_ADDRESS (sym
) = SYMBOL_VALUE_ADDRESS (msymbol
);
3857 SYMBOL_SECTION (sym
) = SYMBOL_SECTION (msymbol
);
3861 sym
= SYMBOL_VALUE_CHAIN (prev
);
3865 sym
= global_sym_chain
[hash
];
3871 sym
= SYMBOL_VALUE_CHAIN (sym
);
3877 /* Initialize anything that needs initializing when starting to read
3878 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
3886 /* Initialize anything that needs initializing when a completely new
3887 symbol file is specified (not just adding some symbols from another
3888 file, e.g. a shared library). */
3891 stabsread_new_init ()
3893 /* Empty the hash table of global syms looking for values. */
3894 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
3897 /* Initialize anything that needs initializing at the same time as
3898 start_symtab() is called. */
3902 global_stabs
= NULL
; /* AIX COFF */
3903 /* Leave FILENUM of 0 free for builtin types and this file's types. */
3904 n_this_object_header_files
= 1;
3905 type_vector_length
= 0;
3906 type_vector
= (struct type
**) 0;
3908 /* FIXME: If common_block_name is not already NULL, we should complain(). */
3909 common_block_name
= NULL
;
3914 /* Call after end_symtab() */
3920 free ((char *) type_vector
);
3923 type_vector_length
= 0;
3924 previous_stab_code
= 0;
3928 finish_global_stabs (objfile
)
3929 struct objfile
*objfile
;
3933 patch_block_stabs (global_symbols
, global_stabs
, objfile
);
3934 free ((PTR
) global_stabs
);
3935 global_stabs
= NULL
;
3939 /* Initializer for this module */
3942 _initialize_stabsread ()
3944 undef_types_allocated
= 20;
3945 undef_types_length
= 0;
3946 undef_types
= (struct type
**)
3947 xmalloc (undef_types_allocated
* sizeof (struct type
*));