1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-1991 Free Software Foundation, Inc.
4 This file is part of GDB.
6 GDB is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 1, or (at your option)
11 GDB is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GDB; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
20 /* Symbol read-in occurs in two phases:
21 1. A scan (read_dbx_symtab()) of the entire executable, whose sole
22 purpose is to make a list of symbols (partial symbol table)
23 which will cause symbols
24 to be read in if referenced. This scan happens when the
25 "symbol-file" command is given (symbol_file_command()).
26 1a. The "add-file" command. Similar to #1.
27 2. Full read-in of symbols. (dbx_psymtab_to_symtab()). This happens
28 when a symbol in a file for which symbols have not yet been
29 read in is referenced. */
31 /* There used to be some PROFILE_TYPES code in this file which counted
32 the number of occurances of various symbols. I'd suggest instead:
33 nm -ap foo | awk 'print $5' | sort | uniq -c
34 to print how many of each n_type, or something like
35 nm -ap foo | awk '$5 == "LSYM" {print $6 $7 $8 $9 $10 $11}' | \
37 {print substr($2,1,1)}' | sort | uniq -c
38 to print the number of each kind of symbol descriptor (i.e. the letter
47 #include <sys/types.h>
53 #include "a.out.gnu.h"
54 #include "stab.gnu.h" /* We always use GNU stabs, not native, now */
59 * Define specifically gnu symbols here.
62 /* The following type indicates the definition of a symbol as being
63 an indirect reference to another symbol. The other symbol
64 appears as an undefined reference, immediately following this symbol.
66 Indirection is asymmetrical. The other symbol's value will be used
67 to satisfy requests for the indirect symbol, but not vice versa.
68 If the other symbol does not have a definition, libraries will
69 be searched to find a definition. */
74 /* The following symbols refer to set elements.
75 All the N_SET[ATDB] symbols with the same name form one set.
76 Space is allocated for the set in the text section, and each set
77 element's value is stored into one word of the space.
78 The first word of the space is the length of the set (number of elements).
80 The address of the set is made into an N_SETV symbol
81 whose name is the same as the name of the set.
82 This symbol acts like a N_DATA global symbol
83 in that it can satisfy undefined external references. */
86 #define N_SETA 0x14 /* Absolute set element symbol */
87 #endif /* This is input to LD, in a .o file. */
90 #define N_SETT 0x16 /* Text set element symbol */
91 #endif /* This is input to LD, in a .o file. */
94 #define N_SETD 0x18 /* Data set element symbol */
95 #endif /* This is input to LD, in a .o file. */
98 #define N_SETB 0x1A /* Bss set element symbol */
99 #endif /* This is input to LD, in a .o file. */
101 /* Macros dealing with the set element symbols defined in a.out.h */
102 #define SET_ELEMENT_P(x) ((x)>=N_SETA&&(x)<=(N_SETB|N_EXT))
103 #define TYPE_OF_SET_ELEMENT(x) ((x)-N_SETA+N_ABS)
106 #define N_SETV 0x1C /* Pointer to set vector in data area. */
107 #endif /* This is output from LD. */
110 #define N_WARNING 0x1E /* Warning message to print if file included */
111 #endif /* This is input to ld */
113 #endif /* NO_GNU_STABS */
116 #include <sys/param.h>
117 #include <sys/file.h>
118 #include <sys/stat.h>
120 #include "breakpoint.h"
123 #include "gdbcore.h" /* for bfd stuff */
124 #include "liba.out.h" /* FIXME Secret internal BFD stuff for a.out */
127 struct dbx_symfile_info
{
128 asection
*text_sect
; /* Text section accessor */
129 int symcount
; /* How many symbols are there in the file */
130 char *stringtab
; /* The actual string table */
131 int stringtab_size
; /* Its size */
132 off_t symtab_offset
; /* Offset in file to symbol table */
133 int desc
; /* File descriptor of symbol file */
136 extern void qsort ();
137 extern double atof ();
138 extern struct cmd_list_element
*cmdlist
;
140 extern void symbol_file_command ();
142 /* Forward declarations */
144 static void add_symbol_to_list ();
145 static void read_dbx_symtab ();
146 static void init_psymbol_list ();
147 static void process_one_symbol ();
148 static struct type
*read_type ();
149 static struct type
*read_range_type ();
150 static struct type
*read_enum_type ();
151 static struct type
*read_struct_type ();
152 static struct type
*read_array_type ();
153 static long read_number ();
154 static void finish_block ();
155 static struct blockvector
*make_blockvector ();
156 static struct symbol
*define_symbol ();
157 static void start_subfile ();
158 static int hashname ();
159 static struct pending
*copy_pending ();
160 static void fix_common_block ();
161 static void add_undefined_type ();
162 static void cleanup_undefined_types ();
163 static void scan_file_globals ();
164 static void read_ofile_symtab ();
165 static void dbx_psymtab_to_symtab ();
168 static struct type
**read_args ();
170 static const char vptr_name
[] = { '_','v','p','t','r',CPLUS_MARKER
};
171 static const char vb_name
[] = { '_','v','b',CPLUS_MARKER
};
173 /* Macro to determine which symbols to ignore when reading the first symbol
174 of a file. Some machines override this definition. */
175 #ifndef IGNORE_SYMBOL
176 /* This code is used on Ultrix systems. Ignore it */
177 #define IGNORE_SYMBOL(type) (type == (int)N_NSYMS)
180 /* Macro for name of symbol to indicate a file compiled with gcc. */
181 #ifndef GCC_COMPILED_FLAG_SYMBOL
182 #define GCC_COMPILED_FLAG_SYMBOL "gcc_compiled."
185 /* Convert stab register number (from `r' declaration) to a gdb REGNUM. */
187 #ifndef STAB_REG_TO_REGNUM
188 #define STAB_REG_TO_REGNUM(VALUE) (VALUE)
191 /* Define this as 1 if a pcc declaration of a char or short argument
192 gives the correct address. Otherwise assume pcc gives the
193 address of the corresponding int, which is not the same on a
194 big-endian machine. */
196 #ifndef BELIEVE_PCC_PROMOTION
197 #define BELIEVE_PCC_PROMOTION 0
200 /* Nonzero means give verbose info on gdb action. From main.c. */
201 extern int info_verbose
;
203 /* Name of source file whose symbol data we are now processing.
204 This comes from a symbol of type N_SO. */
206 static char *last_source_file
;
208 /* Core address of start of text of current source file.
209 This too comes from the N_SO symbol. */
211 static CORE_ADDR last_source_start_addr
;
213 /* The entry point of a file we are reading. */
214 CORE_ADDR entry_point
;
216 /* The list of sub-source-files within the current individual compilation.
217 Each file gets its own symtab with its own linetable and associated info,
218 but they all share one blockvector. */
222 struct subfile
*next
;
225 struct linetable
*line_vector
;
226 int line_vector_length
;
227 int line_vector_index
;
228 int prev_line_number
;
231 static struct subfile
*subfiles
;
233 static struct subfile
*current_subfile
;
235 /* Count symbols as they are processed, for error messages. */
237 static unsigned int symnum
;
239 /* Vector of types defined so far, indexed by their dbx type numbers.
240 (In newer sun systems, dbx uses a pair of numbers in parens,
241 as in "(SUBFILENUM,NUMWITHINSUBFILE)". Then these numbers must be
242 translated through the type_translations hash table to get
243 the index into the type vector.) */
245 static struct typevector
*type_vector
;
247 /* Number of elements allocated for type_vector currently. */
249 static int type_vector_length
;
251 /* Vector of line number information. */
253 static struct linetable
*line_vector
;
255 /* Index of next entry to go in line_vector_index. */
257 static int line_vector_index
;
259 /* Last line number recorded in the line vector. */
261 static int prev_line_number
;
263 /* Number of elements allocated for line_vector currently. */
265 static int line_vector_length
;
267 /* Hash table of global symbols whose values are not known yet.
268 They are chained thru the SYMBOL_VALUE_CHAIN, since we don't
269 have the correct data for that slot yet. */
270 /* The use of the LOC_BLOCK code in this chain is nonstandard--
271 it refers to a FORTRAN common block rather than the usual meaning. */
274 static struct symbol
*global_sym_chain
[HASHSIZE
];
276 /* Record the symbols defined for each context in a list.
277 We don't create a struct block for the context until we
278 know how long to make it. */
280 #define PENDINGSIZE 100
284 struct pending
*next
;
286 struct symbol
*symbol
[PENDINGSIZE
];
289 /* List of free `struct pending' structures for reuse. */
290 struct pending
*free_pendings
;
292 /* Here are the three lists that symbols are put on. */
294 struct pending
*file_symbols
; /* static at top level, and types */
296 struct pending
*global_symbols
; /* global functions and variables */
298 struct pending
*local_symbols
; /* everything local to lexical context */
300 /* List of symbols declared since the last BCOMM. This list is a tail
301 of local_symbols. When ECOMM is seen, the symbols on the list
302 are noted so their proper addresses can be filled in later,
303 using the common block base address gotten from the assembler
306 struct pending
*common_block
;
309 /* Stack representing unclosed lexical contexts
310 (that will become blocks, eventually). */
314 struct pending
*locals
;
315 struct pending_block
*old_blocks
;
317 CORE_ADDR start_addr
;
318 CORE_ADDR end_addr
; /* Temp slot for exception handling. */
322 struct context_stack
*context_stack
;
324 /* Index of first unused entry in context stack. */
325 int context_stack_depth
;
327 /* Currently allocated size of context stack. */
329 int context_stack_size
;
331 /* Nonzero if within a function (so symbols should be local,
332 if nothing says specifically). */
336 /* List of blocks already made (lexical contexts already closed).
337 This is used at the end to make the blockvector. */
341 struct pending_block
*next
;
345 struct pending_block
*pending_blocks
;
347 extern CORE_ADDR startup_file_start
; /* From blockframe.c */
348 extern CORE_ADDR startup_file_end
; /* From blockframe.c */
350 /* Global variable which, when set, indicates that we are processing a
351 .o file compiled with gcc */
353 static unsigned char processing_gcc_compilation
;
355 /* Make a list of forward references which haven't been defined. */
356 static struct type
**undef_types
;
357 static int undef_types_allocated
, undef_types_length
;
359 /* String table for the main symbol file. It is kept in memory
360 permanently, to speed up symbol reading. Other files' symbol tables
361 are read in on demand. FIXME, this should be cleaner. */
363 static char *symfile_string_table
;
364 static int symfile_string_table_size
;
366 /* Setup a define to deal cleanly with the underscore problem */
368 #ifdef NAMES_HAVE_UNDERSCORE
369 #define HASH_OFFSET 1
371 #define HASH_OFFSET 0
374 /* Complaints about the symbols we have encountered. */
376 struct complaint innerblock_complaint
=
377 {"inner block not inside outer block in %s", 0, 0};
379 struct complaint blockvector_complaint
=
380 {"block at %x out of order", 0, 0};
382 struct complaint lbrac_complaint
=
383 {"bad block start address patched", 0, 0};
386 struct complaint dbx_class_complaint
=
387 {"encountered DBX-style class variable debugging information.\n\
388 You seem to have compiled your program with \
389 \"g++ -g0\" instead of \"g++ -g\".\n\
390 Therefore GDB will not know about your class variables", 0, 0};
393 struct complaint string_table_offset_complaint
=
394 {"bad string table offset in symbol %d", 0, 0};
396 struct complaint unknown_symtype_complaint
=
397 {"unknown symbol type 0x%x", 0, 0};
399 struct complaint lbrac_rbrac_complaint
=
400 {"block start larger than block end", 0, 0};
402 struct complaint const_vol_complaint
=
403 {"const/volatile indicator missing, got '%c'", 0, 0};
405 struct complaint error_type_complaint
=
406 {"C++ type mismatch between compiler and debugger", 0, 0};
408 struct complaint invalid_member_complaint
=
409 {"invalid (minimal) member type data format at symtab pos %d.", 0, 0};
411 /* Support for Sun changes to dbx symbol format */
413 /* For each identified header file, we have a table of types defined
416 header_files maps header file names to their type tables.
417 It is a vector of n_header_files elements.
418 Each element describes one header file.
419 It contains a vector of types.
421 Sometimes it can happen that the same header file produces
422 different results when included in different places.
423 This can result from conditionals or from different
424 things done before including the file.
425 When this happens, there are multiple entries for the file in this table,
426 one entry for each distinct set of results.
427 The entries are distinguished by the INSTANCE field.
428 The INSTANCE field appears in the N_BINCL and N_EXCL symbol table and is
429 used to match header-file references to their corresponding data. */
433 char *name
; /* Name of header file */
434 int instance
; /* Numeric code distinguishing instances
435 of one header file that produced
436 different results when included.
437 It comes from the N_BINCL or N_EXCL. */
438 struct type
**vector
; /* Pointer to vector of types */
439 int length
; /* Allocated length (# elts) of that vector */
442 static struct header_file
*header_files
= 0;
444 static int n_header_files
;
446 static int n_allocated_header_files
;
448 /* During initial symbol readin, we need to have a structure to keep
449 track of which psymtabs have which bincls in them. This structure
450 is used during readin to setup the list of dependencies within each
451 partial symbol table. */
453 struct header_file_location
455 char *name
; /* Name of header file */
456 int instance
; /* See above */
457 struct partial_symtab
*pst
; /* Partial symtab that has the
458 BINCL/EINCL defs for this file */
461 /* The actual list and controling variables */
462 static struct header_file_location
*bincl_list
, *next_bincl
;
463 static int bincls_allocated
;
465 /* Within each object file, various header files are assigned numbers.
466 A type is defined or referred to with a pair of numbers
467 (FILENUM,TYPENUM) where FILENUM is the number of the header file
468 and TYPENUM is the number within that header file.
469 TYPENUM is the index within the vector of types for that header file.
471 FILENUM == 1 is special; it refers to the main source of the object file,
472 and not to any header file. FILENUM != 1 is interpreted by looking it up
473 in the following table, which contains indices in header_files. */
475 static int *this_object_header_files
= 0;
477 static int n_this_object_header_files
;
479 static int n_allocated_this_object_header_files
;
481 /* When a header file is getting special overriding definitions
482 for one source file, record here the header_files index
483 of its normal definition vector.
484 At other times, this is -1. */
486 static int header_file_prev_index
;
488 /* Free up old header file tables, and allocate new ones.
489 We're reading a new symbol file now. */
492 free_and_init_header_files ()
495 for (i
= 0; i
< n_header_files
; i
++)
496 free (header_files
[i
].name
);
497 if (header_files
) /* First time null */
499 if (this_object_header_files
) /* First time null */
500 free (this_object_header_files
);
502 n_allocated_header_files
= 10;
503 header_files
= (struct header_file
*) xmalloc (10 * sizeof (struct header_file
));
506 n_allocated_this_object_header_files
= 10;
507 this_object_header_files
= (int *) xmalloc (10 * sizeof (int));
510 /* Called at the start of each object file's symbols.
511 Clear out the mapping of header file numbers to header files. */
514 new_object_header_files ()
516 /* Leave FILENUM of 0 free for builtin types and this file's types. */
517 n_this_object_header_files
= 1;
518 header_file_prev_index
= -1;
521 /* Add header file number I for this object file
522 at the next successive FILENUM. */
525 add_this_object_header_file (i
)
528 if (n_this_object_header_files
== n_allocated_this_object_header_files
)
530 n_allocated_this_object_header_files
*= 2;
531 this_object_header_files
532 = (int *) xrealloc (this_object_header_files
,
533 n_allocated_this_object_header_files
* sizeof (int));
536 this_object_header_files
[n_this_object_header_files
++] = i
;
539 /* Add to this file an "old" header file, one already seen in
540 a previous object file. NAME is the header file's name.
541 INSTANCE is its instance code, to select among multiple
542 symbol tables for the same header file. */
545 add_old_header_file (name
, instance
)
549 register struct header_file
*p
= header_files
;
552 for (i
= 0; i
< n_header_files
; i
++)
553 if (!strcmp (p
[i
].name
, name
) && instance
== p
[i
].instance
)
555 add_this_object_header_file (i
);
558 error ("Invalid symbol data: \"repeated\" header file that hasn't been seen before, at symtab pos %d.",
562 /* Add to this file a "new" header file: definitions for its types follow.
563 NAME is the header file's name.
564 Most often this happens only once for each distinct header file,
565 but not necessarily. If it happens more than once, INSTANCE has
566 a different value each time, and references to the header file
567 use INSTANCE values to select among them.
569 dbx output contains "begin" and "end" markers for each new header file,
570 but at this level we just need to know which files there have been;
571 so we record the file when its "begin" is seen and ignore the "end". */
574 add_new_header_file (name
, instance
)
579 header_file_prev_index
= -1;
581 /* Make sure there is room for one more header file. */
583 if (n_header_files
== n_allocated_header_files
)
585 n_allocated_header_files
*= 2;
586 header_files
= (struct header_file
*)
587 xrealloc (header_files
,
588 (n_allocated_header_files
589 * sizeof (struct header_file
)));
592 /* Create an entry for this header file. */
594 i
= n_header_files
++;
595 header_files
[i
].name
= savestring (name
, strlen(name
));
596 header_files
[i
].instance
= instance
;
597 header_files
[i
].length
= 10;
598 header_files
[i
].vector
599 = (struct type
**) xmalloc (10 * sizeof (struct type
*));
600 bzero (header_files
[i
].vector
, 10 * sizeof (struct type
*));
602 add_this_object_header_file (i
);
605 /* Look up a dbx type-number pair. Return the address of the slot
606 where the type for that number-pair is stored.
607 The number-pair is in TYPENUMS.
609 This can be used for finding the type associated with that pair
610 or for associating a new type with the pair. */
612 static struct type
**
613 dbx_lookup_type (typenums
)
616 register int filenum
= typenums
[0], index
= typenums
[1];
618 if (filenum
< 0 || filenum
>= n_this_object_header_files
)
619 error ("Invalid symbol data: type number (%d,%d) out of range at symtab pos %d.",
620 filenum
, index
, symnum
);
624 /* Type is defined outside of header files.
625 Find it in this object file's type vector. */
626 if (index
>= type_vector_length
)
628 type_vector_length
*= 2;
629 type_vector
= (struct typevector
*)
630 xrealloc (type_vector
,
631 (sizeof (struct typevector
)
632 + type_vector_length
* sizeof (struct type
*)));
633 bzero (&type_vector
->type
[type_vector_length
/ 2],
634 type_vector_length
* sizeof (struct type
*) / 2);
636 return &type_vector
->type
[index
];
640 register int real_filenum
= this_object_header_files
[filenum
];
641 register struct header_file
*f
;
644 if (real_filenum
>= n_header_files
)
647 f
= &header_files
[real_filenum
];
649 f_orig_length
= f
->length
;
650 if (index
>= f_orig_length
)
652 while (index
>= f
->length
)
654 f
->vector
= (struct type
**)
655 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
656 bzero (&f
->vector
[f_orig_length
],
657 (f
->length
- f_orig_length
) * sizeof (struct type
*));
659 return &f
->vector
[index
];
663 /* Create a type object. Occaisionally used when you need a type
664 which isn't going to be given a type number. */
669 register struct type
*type
=
670 (struct type
*) obstack_alloc (symbol_obstack
, sizeof (struct type
));
672 bzero (type
, sizeof (struct type
));
673 TYPE_VPTR_FIELDNO (type
) = -1;
674 TYPE_VPTR_BASETYPE (type
) = 0;
678 /* Make sure there is a type allocated for type numbers TYPENUMS
679 and return the type object.
680 This can create an empty (zeroed) type object.
681 TYPENUMS may be (-1, -1) to return a new type object that is not
682 put into the type vector, and so may not be referred to by number. */
685 dbx_alloc_type (typenums
)
688 register struct type
**type_addr
;
689 register struct type
*type
;
691 if (typenums
[1] != -1)
693 type_addr
= dbx_lookup_type (typenums
);
702 /* If we are referring to a type not known at all yet,
703 allocate an empty type for it.
704 We will fill it in later if we find out how. */
707 type
= dbx_create_type ();
716 static struct type
**
717 explicit_lookup_type (real_filenum
, index
)
718 int real_filenum
, index
;
720 register struct header_file
*f
= &header_files
[real_filenum
];
722 if (index
>= f
->length
)
725 f
->vector
= (struct type
**)
726 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
727 bzero (&f
->vector
[f
->length
/ 2],
728 f
->length
* sizeof (struct type
*) / 2);
730 return &f
->vector
[index
];
734 /* maintain the lists of symbols and blocks */
736 /* Add a symbol to one of the lists of symbols. */
738 add_symbol_to_list (symbol
, listhead
)
739 struct symbol
*symbol
;
740 struct pending
**listhead
;
742 /* We keep PENDINGSIZE symbols in each link of the list.
743 If we don't have a link with room in it, add a new link. */
744 if (*listhead
== 0 || (*listhead
)->nsyms
== PENDINGSIZE
)
746 register struct pending
*link
;
749 link
= free_pendings
;
750 free_pendings
= link
->next
;
753 link
= (struct pending
*) xmalloc (sizeof (struct pending
));
755 link
->next
= *listhead
;
760 (*listhead
)->symbol
[(*listhead
)->nsyms
++] = symbol
;
763 /* At end of reading syms, or in case of quit,
764 really free as many `struct pending's as we can easily find. */
768 really_free_pendings (foo
)
771 struct pending
*next
, *next1
;
772 struct pending_block
*bnext
, *bnext1
;
774 for (next
= free_pendings
; next
; next
= next1
)
781 #if 0 /* Now we make the links in the symbol_obstack, so don't free them. */
782 for (bnext
= pending_blocks
; bnext
; bnext
= bnext1
)
784 bnext1
= bnext
->next
;
790 for (next
= file_symbols
; next
; next
= next1
)
797 for (next
= global_symbols
; next
; next
= next1
)
805 /* Take one of the lists of symbols and make a block from it.
806 Keep the order the symbols have in the list (reversed from the input file).
807 Put the block on the list of pending blocks. */
810 finish_block (symbol
, listhead
, old_blocks
, start
, end
)
811 struct symbol
*symbol
;
812 struct pending
**listhead
;
813 struct pending_block
*old_blocks
;
814 CORE_ADDR start
, end
;
816 register struct pending
*next
, *next1
;
817 register struct block
*block
;
818 register struct pending_block
*pblock
;
819 struct pending_block
*opblock
;
822 /* Count the length of the list of symbols. */
824 for (next
= *listhead
, i
= 0; next
; i
+= next
->nsyms
, next
= next
->next
)
827 block
= (struct block
*) obstack_alloc (symbol_obstack
,
828 (sizeof (struct block
)
830 * sizeof (struct symbol
*))));
832 /* Copy the symbols into the block. */
834 BLOCK_NSYMS (block
) = i
;
835 for (next
= *listhead
; next
; next
= next
->next
)
838 for (j
= next
->nsyms
- 1; j
>= 0; j
--)
839 BLOCK_SYM (block
, --i
) = next
->symbol
[j
];
842 BLOCK_START (block
) = start
;
843 BLOCK_END (block
) = end
;
844 BLOCK_SUPERBLOCK (block
) = 0; /* Filled in when containing block is made */
845 BLOCK_GCC_COMPILED (block
) = processing_gcc_compilation
;
847 /* Put the block in as the value of the symbol that names it. */
851 SYMBOL_BLOCK_VALUE (symbol
) = block
;
852 BLOCK_FUNCTION (block
) = symbol
;
855 BLOCK_FUNCTION (block
) = 0;
857 /* Now "free" the links of the list, and empty the list. */
859 for (next
= *listhead
; next
; next
= next1
)
862 next
->next
= free_pendings
;
863 free_pendings
= next
;
867 /* Install this block as the superblock
868 of all blocks made since the start of this scope
869 that don't have superblocks yet. */
872 for (pblock
= pending_blocks
; pblock
!= old_blocks
; pblock
= pblock
->next
)
874 if (BLOCK_SUPERBLOCK (pblock
->block
) == 0) {
876 /* Check to be sure the blocks are nested as we receive them.
877 If the compiler/assembler/linker work, this just burns a small
879 if (BLOCK_START (pblock
->block
) < BLOCK_START (block
)
880 || BLOCK_END (pblock
->block
) > BLOCK_END (block
)) {
881 complain(&innerblock_complaint
, symbol
? SYMBOL_NAME (symbol
):
883 BLOCK_START (pblock
->block
) = BLOCK_START (block
);
884 BLOCK_END (pblock
->block
) = BLOCK_END (block
);
887 BLOCK_SUPERBLOCK (pblock
->block
) = block
;
892 /* Record this block on the list of all blocks in the file.
893 Put it after opblock, or at the beginning if opblock is 0.
894 This puts the block in the list after all its subblocks. */
896 /* Allocate in the symbol_obstack to save time.
897 It wastes a little space. */
898 pblock
= (struct pending_block
*)
899 obstack_alloc (symbol_obstack
,
900 sizeof (struct pending_block
));
901 pblock
->block
= block
;
904 pblock
->next
= opblock
->next
;
905 opblock
->next
= pblock
;
909 pblock
->next
= pending_blocks
;
910 pending_blocks
= pblock
;
914 static struct blockvector
*
917 register struct pending_block
*next
;
918 register struct blockvector
*blockvector
;
921 /* Count the length of the list of blocks. */
923 for (next
= pending_blocks
, i
= 0; next
; next
= next
->next
, i
++);
925 blockvector
= (struct blockvector
*)
926 obstack_alloc (symbol_obstack
,
927 (sizeof (struct blockvector
)
928 + (i
- 1) * sizeof (struct block
*)));
930 /* Copy the blocks into the blockvector.
931 This is done in reverse order, which happens to put
932 the blocks into the proper order (ascending starting address).
933 finish_block has hair to insert each block into the list
934 after its subblocks in order to make sure this is true. */
936 BLOCKVECTOR_NBLOCKS (blockvector
) = i
;
937 for (next
= pending_blocks
; next
; next
= next
->next
) {
938 BLOCKVECTOR_BLOCK (blockvector
, --i
) = next
->block
;
941 #if 0 /* Now we make the links in the obstack, so don't free them. */
942 /* Now free the links of the list, and empty the list. */
944 for (next
= pending_blocks
; next
; next
= next1
)
952 #if 1 /* FIXME, shut this off after a while to speed up symbol reading. */
953 /* Some compilers output blocks in the wrong order, but we depend
954 on their being in the right order so we can binary search.
955 Check the order and moan about it. FIXME. */
956 if (BLOCKVECTOR_NBLOCKS (blockvector
) > 1)
957 for (i
= 1; i
< BLOCKVECTOR_NBLOCKS (blockvector
); i
++) {
958 if (BLOCK_START(BLOCKVECTOR_BLOCK (blockvector
, i
-1))
959 > BLOCK_START(BLOCKVECTOR_BLOCK (blockvector
, i
))) {
960 complain (&blockvector_complaint
,
961 BLOCK_START(BLOCKVECTOR_BLOCK (blockvector
, i
)));
969 /* Manage the vector of line numbers. */
972 record_line (line
, pc
)
976 struct linetable_entry
*e
;
977 /* Ignore the dummy line number in libg.o */
982 /* Make sure line vector is big enough. */
984 if (line_vector_index
+ 1 >= line_vector_length
)
986 line_vector_length
*= 2;
987 line_vector
= (struct linetable
*)
988 xrealloc (line_vector
,
989 (sizeof (struct linetable
)
990 + line_vector_length
* sizeof (struct linetable_entry
)));
991 current_subfile
->line_vector
= line_vector
;
994 e
= line_vector
->item
+ line_vector_index
++;
995 e
->line
= line
; e
->pc
= pc
;
998 /* Start a new symtab for a new source file.
999 This is called when a dbx symbol of type N_SO is seen;
1000 it indicates the start of data for one original source file. */
1003 start_symtab (name
, dirname
, start_addr
)
1006 CORE_ADDR start_addr
;
1009 last_source_file
= name
;
1010 last_source_start_addr
= start_addr
;
1013 within_function
= 0;
1015 /* Context stack is initially empty, with room for 10 levels. */
1017 = (struct context_stack
*) xmalloc (10 * sizeof (struct context_stack
));
1018 context_stack_size
= 10;
1019 context_stack_depth
= 0;
1021 new_object_header_files ();
1023 type_vector_length
= 160;
1024 type_vector
= (struct typevector
*)
1025 xmalloc (sizeof (struct typevector
)
1026 + type_vector_length
* sizeof (struct type
*));
1027 bzero (type_vector
->type
, type_vector_length
* sizeof (struct type
*));
1029 /* Initialize the list of sub source files with one entry
1030 for this file (the top-level source file). */
1033 current_subfile
= 0;
1034 start_subfile (name
, dirname
);
1037 /* Handle an N_SOL symbol, which indicates the start of
1038 code that came from an included (or otherwise merged-in)
1039 source file with a different name. */
1042 start_subfile (name
, dirname
)
1046 register struct subfile
*subfile
;
1048 /* Save the current subfile's line vector data. */
1050 if (current_subfile
)
1052 current_subfile
->line_vector_index
= line_vector_index
;
1053 current_subfile
->line_vector_length
= line_vector_length
;
1054 current_subfile
->prev_line_number
= prev_line_number
;
1057 /* See if this subfile is already known as a subfile of the
1058 current main source file. */
1060 for (subfile
= subfiles
; subfile
; subfile
= subfile
->next
)
1062 if (!strcmp (subfile
->name
, name
))
1064 line_vector
= subfile
->line_vector
;
1065 line_vector_index
= subfile
->line_vector_index
;
1066 line_vector_length
= subfile
->line_vector_length
;
1067 prev_line_number
= subfile
->prev_line_number
;
1068 current_subfile
= subfile
;
1073 /* This subfile is not known. Add an entry for it. */
1075 line_vector_index
= 0;
1076 line_vector_length
= 1000;
1077 prev_line_number
= -2; /* Force first line number to be explicit */
1078 line_vector
= (struct linetable
*)
1079 xmalloc (sizeof (struct linetable
)
1080 + line_vector_length
* sizeof (struct linetable_entry
));
1082 /* Make an entry for this subfile in the list of all subfiles
1083 of the current main source file. */
1085 subfile
= (struct subfile
*) xmalloc (sizeof (struct subfile
));
1086 subfile
->next
= subfiles
;
1087 subfile
->name
= obsavestring (name
, strlen (name
));
1088 if (dirname
== NULL
)
1089 subfile
->dirname
= NULL
;
1091 subfile
->dirname
= obsavestring (dirname
, strlen (dirname
));
1093 subfile
->line_vector
= line_vector
;
1095 current_subfile
= subfile
;
1098 /* Finish the symbol definitions for one main source file,
1099 close off all the lexical contexts for that file
1100 (creating struct block's for them), then make the struct symtab
1101 for that file and put it in the list of all such.
1103 END_ADDR is the address of the end of the file's text. */
1106 end_symtab (end_addr
)
1109 register struct symtab
*symtab
;
1110 register struct blockvector
*blockvector
;
1111 register struct subfile
*subfile
;
1112 register struct linetable
*lv
;
1113 struct subfile
*nextsub
;
1115 /* Finish the lexical context of the last function in the file;
1116 pop the context stack. */
1118 if (context_stack_depth
> 0)
1120 register struct context_stack
*cstk
;
1121 context_stack_depth
--;
1122 cstk
= &context_stack
[context_stack_depth
];
1123 /* Make a block for the local symbols within. */
1124 finish_block (cstk
->name
, &local_symbols
, cstk
->old_blocks
,
1125 cstk
->start_addr
, end_addr
);
1128 /* Cleanup any undefined types that have been left hanging around
1129 (this needs to be done before the finish_blocks so that
1130 file_symbols is still good). */
1131 cleanup_undefined_types ();
1133 /* Define the STATIC_BLOCK and GLOBAL_BLOCK, and build the blockvector. */
1134 finish_block (0, &file_symbols
, 0, last_source_start_addr
, end_addr
);
1135 finish_block (0, &global_symbols
, 0, last_source_start_addr
, end_addr
);
1136 blockvector
= make_blockvector ();
1138 current_subfile
->line_vector_index
= line_vector_index
;
1140 /* Now create the symtab objects proper, one for each subfile. */
1141 /* (The main file is one of them.) */
1143 for (subfile
= subfiles
; subfile
; subfile
= nextsub
)
1145 symtab
= (struct symtab
*) xmalloc (sizeof (struct symtab
));
1147 /* Fill in its components. */
1148 symtab
->blockvector
= blockvector
;
1149 lv
= subfile
->line_vector
;
1150 lv
->nitems
= subfile
->line_vector_index
;
1151 symtab
->linetable
= (struct linetable
*)
1152 xrealloc (lv
, (sizeof (struct linetable
)
1153 + lv
->nitems
* sizeof (struct linetable_entry
)));
1154 type_vector
->length
= type_vector_length
;
1155 symtab
->typevector
= type_vector
;
1157 symtab
->filename
= subfile
->name
;
1158 symtab
->dirname
= subfile
->dirname
;
1160 symtab
->free_code
= free_linetable
;
1161 symtab
->free_ptr
= 0;
1162 if (subfile
->next
== 0)
1163 symtab
->free_ptr
= (char *) type_vector
;
1166 symtab
->line_charpos
= 0;
1168 symtab
->language
= language_unknown
;
1169 symtab
->fullname
= NULL
;
1171 /* There should never already be a symtab for this name, since
1172 any prev dups have been removed when the psymtab was read in.
1173 FIXME, there ought to be a way to check this here. */
1174 /* FIXME blewit |= free_named_symtabs (symtab->filename); */
1176 /* Link the new symtab into the list of such. */
1177 symtab
->next
= symtab_list
;
1178 symtab_list
= symtab
;
1180 nextsub
= subfile
->next
;
1185 type_vector_length
= -1;
1187 line_vector_length
= -1;
1188 last_source_file
= 0;
1191 /* Handle the N_BINCL and N_EINCL symbol types
1192 that act like N_SOL for switching source files
1193 (different subfiles, as we call them) within one object file,
1194 but using a stack rather than in an arbitrary order. */
1196 struct subfile_stack
1198 struct subfile_stack
*next
;
1203 struct subfile_stack
*subfile_stack
;
1208 register struct subfile_stack
*tem
1209 = (struct subfile_stack
*) xmalloc (sizeof (struct subfile_stack
));
1211 tem
->next
= subfile_stack
;
1212 subfile_stack
= tem
;
1213 if (current_subfile
== 0 || current_subfile
->name
== 0)
1215 tem
->name
= current_subfile
->name
;
1216 tem
->prev_index
= header_file_prev_index
;
1222 register char *name
;
1223 register struct subfile_stack
*link
= subfile_stack
;
1229 subfile_stack
= link
->next
;
1230 header_file_prev_index
= link
->prev_index
;
1237 record_misc_function (name
, address
, type
)
1242 enum misc_function_type misc_type
=
1243 (type
== (N_TEXT
| N_EXT
) ? mf_text
:
1244 (type
== (N_DATA
| N_EXT
)
1246 || type
== (N_SETV
| N_EXT
)
1248 type
== (N_BSS
| N_EXT
) ? mf_bss
:
1249 type
== (N_ABS
| N_EXT
) ? mf_abs
: mf_unknown
);
1251 prim_record_misc_function (obsavestring (name
, strlen (name
)),
1252 address
, misc_type
);
1255 /* Scan and build partial symbols for a symbol file.
1256 We have been initialized by a call to dbx_symfile_init, which
1257 put all the relevant info into a "struct dbx_symfile_info"
1258 hung off the struct sym_fns SF.
1260 ADDR is the address relative to which the symbols in it are (e.g.
1261 the base address of the text segment).
1262 MAINLINE is true if we are reading the main symbol
1263 table (as opposed to a shared lib or dynamically loaded file). */
1266 dbx_symfile_read (sf
, addr
, mainline
)
1269 int mainline
; /* FIXME comments above */
1271 struct dbx_symfile_info
*info
= (struct dbx_symfile_info
*) (sf
->sym_private
);
1272 bfd
*sym_bfd
= sf
->sym_bfd
;
1274 char *filename
= bfd_get_filename (sym_bfd
);
1276 val
= lseek (info
->desc
, info
->symtab_offset
, L_SET
);
1278 perror_with_name (filename
);
1280 /* If mainline, set global string table pointers, and reinitialize global
1281 partial symbol list. */
1283 symfile_string_table
= info
->stringtab
;
1284 symfile_string_table_size
= info
->stringtab_size
;
1287 /* If we are reinitializing, or if we have never loaded syms yet, init */
1288 if (mainline
|| global_psymbols
.size
== 0 || static_psymbols
.size
== 0)
1289 init_psymbol_list (info
->symcount
);
1291 symfile_bfd
= sym_bfd
; /* Kludge for SWAP_SYMBOL */
1294 make_cleanup (really_free_pendings
, 0);
1296 init_misc_bunches ();
1297 make_cleanup (discard_misc_bunches
, 0);
1299 /* Now that the symbol table data of the executable file are all in core,
1300 process them and define symbols accordingly. */
1302 read_dbx_symtab (filename
,
1303 addr
- bfd_section_vma (sym_bfd
, info
->text_sect
), /*offset*/
1304 info
->desc
, info
->stringtab
, info
->stringtab_size
,
1306 bfd_section_vma (sym_bfd
, info
->text_sect
),
1307 bfd_section_size (sym_bfd
, info
->text_sect
));
1309 /* Go over the misc symbol bunches and install them in vector. */
1311 condense_misc_bunches (!mainline
);
1313 /* Free up any memory we allocated for ourselves. */
1316 free (info
->stringtab
); /* Stringtab is only saved for mainline */
1319 sf
->sym_private
= 0; /* Zap pointer to our (now gone) info struct */
1321 /* Call to select_source_symtab used to be here; it was using too
1322 much time. I'll make sure that list_sources can handle the lack
1323 of current_source_symtab */
1325 if (!partial_symtab_list
)
1326 printf_filtered ("\n(no debugging symbols found)...");
1329 /* Discard any information we have cached during the reading of a
1330 single symbol file. This should not toss global information
1331 from previous symbol files that have been read. E.g. we might
1332 be discarding info from reading a shared library, and should not
1333 throw away the info from the main file. */
1336 dbx_symfile_discard ()
1339 /* Empty the hash table of global syms looking for values. */
1340 bzero (global_sym_chain
, sizeof global_sym_chain
);
1347 /* Initialize anything that needs initializing when a completely new
1348 symbol file is specified (not just adding some symbols from another
1349 file, e.g. a shared library). */
1354 dbx_symfile_discard ();
1355 /* Don't put these on the cleanup chain; they need to stick around
1356 until the next call to symbol_file_command. *Then* we'll free
1358 if (symfile_string_table
)
1360 free (symfile_string_table
);
1361 symfile_string_table
= 0;
1362 symfile_string_table_size
= 0;
1364 free_and_init_header_files ();
1368 /* dbx_symfile_init ()
1369 is the dbx-specific initialization routine for reading symbols.
1370 It is passed a struct sym_fns which contains, among other things,
1371 the BFD for the file whose symbols are being read, and a slot for a pointer
1372 to "private data" which we fill with goodies.
1374 We read the string table into malloc'd space and stash a pointer to it.
1376 Since BFD doesn't know how to read debug symbols in a format-independent
1377 way (and may never do so...), we have to do it ourselves. We will never
1378 be called unless this is an a.out (or very similar) file.
1379 FIXME, there should be a cleaner peephole into the BFD environment here. */
1382 dbx_symfile_init (sf
)
1387 struct stat statbuf
;
1388 bfd
*sym_bfd
= sf
->sym_bfd
;
1389 char *name
= bfd_get_filename (sym_bfd
);
1390 struct dbx_symfile_info
*info
;
1391 unsigned char size_temp
[4];
1393 /* Allocate struct to keep track of the symfile */
1394 sf
->sym_private
= xmalloc (sizeof (*info
)); /* FIXME storage leak */
1395 info
= (struct dbx_symfile_info
*)sf
->sym_private
;
1397 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
1398 desc
= fileno ((FILE *)(sym_bfd
->iostream
)); /* Raw file descriptor */
1399 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
1400 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
1401 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
1404 info
->text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
1405 if (!info
->text_sect
)
1407 info
->symcount
= bfd_get_symcount_upper_bound(sym_bfd
); /* It's exact for a.out */
1409 /* Read the string table size and check it for bogosity. */
1410 val
= lseek (desc
, STRING_TABLE_OFFSET
, L_SET
);
1412 perror_with_name (name
);
1413 if (fstat (desc
, &statbuf
) == -1)
1414 perror_with_name (name
);
1416 val
= myread (desc
, size_temp
, sizeof (long));
1418 perror_with_name (name
);
1419 info
->stringtab_size
= bfd_h_getlong (sym_bfd
, size_temp
);
1421 if (info
->stringtab_size
>= 0 && info
->stringtab_size
< statbuf
.st_size
)
1423 info
->stringtab
= (char *) xmalloc (info
->stringtab_size
);
1424 /* Caller is responsible for freeing the string table. No cleanup. */
1427 info
->stringtab
= NULL
;
1428 if (info
->stringtab
== NULL
&& info
->stringtab_size
!= 0)
1429 error ("ridiculous string table size: %d bytes", info
->stringtab_size
);
1431 /* Now read in the string table in one big gulp. */
1433 val
= lseek (desc
, STRING_TABLE_OFFSET
, L_SET
);
1435 perror_with_name (name
);
1436 val
= myread (desc
, info
->stringtab
, info
->stringtab_size
);
1438 perror_with_name (name
);
1440 /* Record the position of the symbol table for later use. */
1442 info
->symtab_offset
= SYMBOL_TABLE_OFFSET
;
1445 /* Buffer for reading the symbol table entries. */
1446 static struct nlist symbuf
[4096];
1447 static int symbuf_idx
;
1448 static int symbuf_end
;
1450 /* I/O descriptor for reading the symbol table. */
1451 static int symtab_input_desc
;
1453 /* The address in memory of the string table of the object file we are
1454 reading (which might not be the "main" object file, but might be a
1455 shared library or some other dynamically loaded thing). This is set
1456 by read_dbx_symtab when building psymtabs, and by read_ofile_symtab
1457 when building symtabs, and is used only by next_symbol_text. */
1458 static char *stringtab_global
;
1460 /* Refill the symbol table input buffer
1461 and set the variables that control fetching entries from it.
1462 Reports an error if no data available.
1463 This function can read past the end of the symbol table
1464 (into the string table) but this does no harm. */
1469 int nbytes
= myread (symtab_input_desc
, symbuf
, sizeof (symbuf
));
1471 perror_with_name ("<symbol file>");
1472 else if (nbytes
== 0)
1473 error ("Premature end of file reading symbol table");
1474 symbuf_end
= nbytes
/ sizeof (struct nlist
);
1479 #define SWAP_SYMBOL(symp) \
1481 (symp)->n_un.n_strx = bfd_h_getlong(symfile_bfd, \
1482 (unsigned char *)&(symp)->n_un.n_strx); \
1483 (symp)->n_desc = bfd_h_getshort (symfile_bfd, \
1484 (unsigned char *)&(symp)->n_desc); \
1485 (symp)->n_value = bfd_h_getlong (symfile_bfd, \
1486 (unsigned char *)&(symp)->n_value); \
1489 /* Invariant: The symbol pointed to by symbuf_idx is the first one
1490 that hasn't been swapped. Swap the symbol at the same time
1491 that symbuf_idx is incremented. */
1493 /* dbx allows the text of a symbol name to be continued into the
1494 next symbol name! When such a continuation is encountered
1495 (a \ at the end of the text of a name)
1496 call this function to get the continuation. */
1501 if (symbuf_idx
== symbuf_end
)
1504 SWAP_SYMBOL(&symbuf
[symbuf_idx
]);
1505 return symbuf
[symbuf_idx
++].n_un
.n_strx
+ stringtab_global
;
1508 /* Initializes storage for all of the partial symbols that will be
1509 created by read_dbx_symtab and subsidiaries. */
1512 init_psymbol_list (total_symbols
)
1515 /* Free any previously allocated psymbol lists. */
1516 if (global_psymbols
.list
)
1517 free (global_psymbols
.list
);
1518 if (static_psymbols
.list
)
1519 free (static_psymbols
.list
);
1521 /* Current best guess is that there are approximately a twentieth
1522 of the total symbols (in a debugging file) are global or static
1524 global_psymbols
.size
= total_symbols
/ 10;
1525 static_psymbols
.size
= total_symbols
/ 10;
1526 global_psymbols
.next
= global_psymbols
.list
= (struct partial_symbol
*)
1527 xmalloc (global_psymbols
.size
* sizeof (struct partial_symbol
));
1528 static_psymbols
.next
= static_psymbols
.list
= (struct partial_symbol
*)
1529 xmalloc (static_psymbols
.size
* sizeof (struct partial_symbol
));
1532 /* Initialize the list of bincls to contain none and have some
1536 init_bincl_list (number
)
1539 bincls_allocated
= number
;
1540 next_bincl
= bincl_list
= (struct header_file_location
*)
1541 xmalloc (bincls_allocated
* sizeof(struct header_file_location
));
1544 /* Add a bincl to the list. */
1547 add_bincl_to_list (pst
, name
, instance
)
1548 struct partial_symtab
*pst
;
1552 if (next_bincl
>= bincl_list
+ bincls_allocated
)
1554 int offset
= next_bincl
- bincl_list
;
1555 bincls_allocated
*= 2;
1556 bincl_list
= (struct header_file_location
*)
1557 xrealloc ((char *)bincl_list
,
1558 bincls_allocated
* sizeof (struct header_file_location
));
1559 next_bincl
= bincl_list
+ offset
;
1561 next_bincl
->pst
= pst
;
1562 next_bincl
->instance
= instance
;
1563 next_bincl
++->name
= name
;
1566 /* Given a name, value pair, find the corresponding
1567 bincl in the list. Return the partial symtab associated
1568 with that header_file_location. */
1570 struct partial_symtab
*
1571 find_corresponding_bincl_psymtab (name
, instance
)
1575 struct header_file_location
*bincl
;
1577 for (bincl
= bincl_list
; bincl
< next_bincl
; bincl
++)
1578 if (bincl
->instance
== instance
1579 && !strcmp (name
, bincl
->name
))
1582 return (struct partial_symtab
*) 0;
1585 /* Free the storage allocated for the bincl list. */
1591 bincls_allocated
= 0;
1594 static struct partial_symtab
*start_psymtab ();
1595 static void end_psymtab();
1598 /* This is normally a macro defined in read_dbx_symtab, but this
1599 is a lot easier to debug. */
1601 ADD_PSYMBOL_TO_PLIST(NAME
, NAMELENGTH
, NAMESPACE
, CLASS
, PLIST
, VALUE
)
1604 enum namespace NAMESPACE
;
1605 enum address_class CLASS
;
1606 struct psymbol_allocation_list
*PLIST
;
1607 unsigned long VALUE
;
1609 register struct partial_symbol
*psym
;
1614 (LIST
).list
+ (LIST
).size
)
1616 (LIST
).list
= (struct partial_symbol
*)
1617 xrealloc ((LIST
).list
,
1619 * sizeof (struct partial_symbol
)));
1620 /* Next assumes we only went one over. Should be good if
1621 program works correctly */
1623 (LIST
).list
+ (LIST
).size
;
1626 psym
= (LIST
).next
++;
1629 SYMBOL_NAME (psym
) = (char *) obstack_alloc (psymbol_obstack
,
1631 strncpy (SYMBOL_NAME (psym
), (NAME
), (NAMELENGTH
));
1632 SYMBOL_NAME (psym
)[(NAMELENGTH
)] = '\0';
1633 SYMBOL_NAMESPACE (psym
) = (NAMESPACE
);
1634 SYMBOL_CLASS (psym
) = (CLASS
);
1635 SYMBOL_VALUE (psym
) = (VALUE
);
1639 /* Since one arg is a struct, we have to pass in a ptr and deref it (sigh) */
1640 #define ADD_PSYMBOL_TO_LIST(NAME, NAMELENGTH, NAMESPACE, CLASS, LIST, VALUE) \
1641 ADD_PSYMBOL_TO_PLIST(NAME, NAMELENGTH, NAMESPACE, CLASS, &LIST, VALUE)
1645 /* Given pointers to an a.out symbol table in core containing dbx
1646 style data, setup partial_symtab's describing each source file for
1647 which debugging information is available. NLISTLEN is the number
1648 of symbols in the symbol table. All symbol names are given as
1649 offsets relative to STRINGTAB. STRINGTAB_SIZE is the size of
1650 STRINGTAB. SYMFILE_NAME is the name of the file we are reading from
1651 and ADDR is its relocated address (if incremental) or 0 (if not). */
1654 read_dbx_symtab (symfile_name
, addr
,
1655 desc
, stringtab
, stringtab_size
, nlistlen
,
1656 text_addr
, text_size
)
1660 register char *stringtab
;
1661 register long stringtab_size
;
1662 register int nlistlen
;
1663 CORE_ADDR text_addr
;
1666 register struct nlist
*bufp
;
1667 register char *namestring
;
1668 register struct partial_symbol
*psym
;
1670 int past_first_source_file
= 0;
1671 CORE_ADDR last_o_file_start
= 0;
1672 struct cleanup
*old_chain
;
1675 /* End of the text segment of the executable file. */
1676 CORE_ADDR end_of_text_addr
;
1678 /* Current partial symtab */
1679 struct partial_symtab
*pst
;
1681 /* List of current psymtab's include files */
1682 char **psymtab_include_list
;
1683 int includes_allocated
;
1686 /* Index within current psymtab dependency list */
1687 struct partial_symtab
**dependency_list
;
1688 int dependencies_used
, dependencies_allocated
;
1690 stringtab_global
= stringtab
;
1692 pst
= (struct partial_symtab
*) 0;
1694 includes_allocated
= 30;
1696 psymtab_include_list
= (char **) alloca (includes_allocated
*
1699 dependencies_allocated
= 30;
1700 dependencies_used
= 0;
1702 (struct partial_symtab
**) alloca (dependencies_allocated
*
1703 sizeof (struct partial_symtab
*));
1705 /* FIXME!! If an error occurs, this blows away the whole symbol table!
1706 It should only blow away the psymtabs created herein. We could
1707 be reading a shared library or a dynloaded file! */
1708 old_chain
= make_cleanup (free_all_psymtabs
, 0);
1710 /* Init bincl list */
1711 init_bincl_list (20);
1712 make_cleanup (free_bincl_list
, 0);
1714 last_source_file
= 0;
1716 #ifdef END_OF_TEXT_DEFAULT
1717 end_of_text_addr
= END_OF_TEXT_DEFAULT
;
1719 end_of_text_addr
= text_addr
+ text_size
;
1722 symtab_input_desc
= desc
; /* This is needed for fill_symbuf below */
1723 symbuf_end
= symbuf_idx
= 0;
1725 for (symnum
= 0; symnum
< nlistlen
; symnum
++)
1727 /* Get the symbol for this run and pull out some info */
1728 QUIT
; /* allow this to be interruptable */
1729 if (symbuf_idx
== symbuf_end
)
1731 bufp
= &symbuf
[symbuf_idx
++];
1734 * Special case to speed up readin.
1736 if (bufp
->n_type
== (unsigned char)N_SLINE
) continue;
1740 /* Ok. There is a lot of code duplicated in the rest of this
1741 switch statement (for efficiency reasons). Since I don't
1742 like duplicating code, I will do my penance here, and
1743 describe the code which is duplicated:
1745 *) The assignment to namestring.
1746 *) The call to strchr.
1747 *) The addition of a partial symbol the the two partial
1748 symbol lists. This last is a large section of code, so
1749 I've imbedded it in the following macro.
1752 /* Set namestring based on bufp. If the string table index is invalid,
1753 give a fake name, and print a single error message per symbol file read,
1754 rather than abort the symbol reading or flood the user with messages. */
1755 #define SET_NAMESTRING()\
1756 if (bufp->n_un.n_strx < 0 || bufp->n_un.n_strx >= stringtab_size) { \
1757 complain (&string_table_offset_complaint, symnum); \
1758 namestring = "foo"; \
1760 namestring = bufp->n_un.n_strx + stringtab
1762 /* Add a symbol with an integer value to a psymtab. */
1763 /* This is a macro unless we're debugging. See above this function. */
1765 # define ADD_PSYMBOL_TO_LIST(NAME, NAMELENGTH, NAMESPACE, CLASS, LIST, VALUE) \
1766 ADD_PSYMBOL_VT_TO_LIST(NAME, NAMELENGTH, NAMESPACE, CLASS, LIST, VALUE, \
1770 /* Add a symbol with a CORE_ADDR value to a psymtab. */
1771 #define ADD_PSYMBOL_ADDR_TO_LIST(NAME, NAMELENGTH, NAMESPACE, CLASS, LIST, VALUE) \
1772 ADD_PSYMBOL_VT_TO_LIST(NAME, NAMELENGTH, NAMESPACE, CLASS, LIST, VALUE, \
1773 SYMBOL_VALUE_ADDRESS)
1775 /* Add any kind of symbol to a psymtab. */
1776 #define ADD_PSYMBOL_VT_TO_LIST(NAME, NAMELENGTH, NAMESPACE, CLASS, LIST, VALUE, VT)\
1778 if ((LIST).next >= \
1779 (LIST).list + (LIST).size) \
1781 (LIST).list = (struct partial_symbol *) \
1782 xrealloc ((LIST).list, \
1784 * sizeof (struct partial_symbol))); \
1785 /* Next assumes we only went one over. Should be good if \
1786 program works correctly */ \
1788 (LIST).list + (LIST).size; \
1791 psym = (LIST).next++; \
1793 SYMBOL_NAME (psym) = (char *) obstack_alloc (psymbol_obstack, \
1794 (NAMELENGTH) + 1); \
1795 strncpy (SYMBOL_NAME (psym), (NAME), (NAMELENGTH)); \
1796 SYMBOL_NAME (psym)[(NAMELENGTH)] = '\0'; \
1797 SYMBOL_NAMESPACE (psym) = (NAMESPACE); \
1798 SYMBOL_CLASS (psym) = (CLASS); \
1799 VT (psym) = (VALUE); \
1802 /* End of macro definitions, now let's handle them symbols! */
1804 switch (bufp
->n_type
)
1807 * Standard, external, non-debugger, symbols
1810 case N_TEXT
| N_EXT
:
1811 case N_NBTEXT
| N_EXT
:
1812 case N_NBDATA
| N_EXT
:
1813 case N_NBBSS
| N_EXT
:
1814 case N_SETV
| N_EXT
:
1816 case N_DATA
| N_EXT
:
1819 bufp
->n_value
+= addr
; /* Relocate */
1824 record_misc_function (namestring
, bufp
->n_value
,
1825 bufp
->n_type
); /* Always */
1829 /* Standard, local, non-debugger, symbols */
1833 /* We need to be able to deal with both N_FN or N_TEXT,
1834 because we have no way of knowing whether the sys-supplied ld
1835 or GNU ld was used to make the executable. */
1836 #if ! (N_FN & N_EXT)
1841 bufp
->n_value
+= addr
; /* Relocate */
1843 if ((namestring
[0] == '-' && namestring
[1] == 'l')
1844 || (namestring
[(nsl
= strlen (namestring
)) - 1] == 'o'
1845 && namestring
[nsl
- 2] == '.'))
1847 if (entry_point
< bufp
->n_value
1848 && entry_point
>= last_o_file_start
1849 && addr
== 0) /* FIXME nogood nomore */
1851 startup_file_start
= last_o_file_start
;
1852 startup_file_end
= bufp
->n_value
;
1854 if (past_first_source_file
&& pst
1855 /* The gould NP1 uses low values for .o and -l symbols
1856 which are not the address. */
1857 && bufp
->n_value
> pst
->textlow
)
1859 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1860 symnum
* sizeof (struct nlist
), bufp
->n_value
,
1861 dependency_list
, dependencies_used
,
1862 global_psymbols
.next
, static_psymbols
.next
);
1863 pst
= (struct partial_symtab
*) 0;
1865 dependencies_used
= 0;
1868 past_first_source_file
= 1;
1869 last_o_file_start
= bufp
->n_value
;
1874 bufp
->n_value
+= addr
; /* Relocate */
1876 /* Check for __DYNAMIC, which is used by Sun shared libraries.
1877 Record it even if it's local, not global, so we can find it.
1878 Same with virtual function tables, both global and static. */
1879 if ((namestring
[8] == 'C' && (strcmp ("__DYNAMIC", namestring
) == 0))
1880 || VTBL_PREFIX_P ((namestring
+HASH_OFFSET
)))
1882 /* Not really a function here, but... */
1883 record_misc_function (namestring
, bufp
->n_value
,
1884 bufp
->n_type
); /* Always */
1888 case N_UNDF
| N_EXT
:
1889 if (bufp
->n_value
!= 0) {
1890 /* This is a "Fortran COMMON" symbol. See if the target
1891 environment knows where it has been relocated to. */
1896 if (target_lookup_symbol (namestring
, &reladdr
)) {
1897 continue; /* Error in lookup; ignore symbol for now. */
1899 bufp
->n_type
^= (N_BSS
^N_UNDF
); /* Define it as a bss-symbol */
1900 bufp
->n_value
= reladdr
;
1901 goto bss_ext_symbol
;
1903 continue; /* Just undefined, not COMMON */
1905 /* Lots of symbol types we can just ignore. */
1914 /* Keep going . . .*/
1917 * Special symbol types for GNU
1920 case N_INDR
| N_EXT
:
1922 case N_SETA
| N_EXT
:
1924 case N_SETT
| N_EXT
:
1926 case N_SETD
| N_EXT
:
1928 case N_SETB
| N_EXT
:
1937 unsigned long valu
= bufp
->n_value
;
1938 /* Symbol number of the first symbol of this file (i.e. the N_SO
1939 if there is just one, or the first if we have a pair). */
1940 int first_symnum
= symnum
;
1942 /* End the current partial symtab and start a new one */
1946 /* Peek at the next symbol. If it is also an N_SO, the
1947 first one just indicates the directory. */
1948 if (symbuf_idx
== symbuf_end
)
1950 bufp
= &symbuf
[symbuf_idx
];
1951 /* n_type is only a char, so swapping swapping is irrelevant. */
1952 if (bufp
->n_type
== (unsigned char)N_SO
)
1956 valu
= bufp
->n_value
;
1960 valu
+= addr
; /* Relocate */
1962 if (pst
&& past_first_source_file
)
1964 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1965 first_symnum
* sizeof (struct nlist
), valu
,
1966 dependency_list
, dependencies_used
,
1967 global_psymbols
.next
, static_psymbols
.next
);
1968 pst
= (struct partial_symtab
*) 0;
1970 dependencies_used
= 0;
1973 past_first_source_file
= 1;
1975 pst
= start_psymtab (symfile_name
, addr
,
1977 first_symnum
* sizeof (struct nlist
),
1978 global_psymbols
.next
, static_psymbols
.next
);
1984 /* Add this bincl to the bincl_list for future EXCLs. No
1985 need to save the string; it'll be around until
1986 read_dbx_symtab function returns */
1990 add_bincl_to_list (pst
, namestring
, bufp
->n_value
);
1992 /* Mark down an include file in the current psymtab */
1994 psymtab_include_list
[includes_used
++] = namestring
;
1995 if (includes_used
>= includes_allocated
)
1997 char **orig
= psymtab_include_list
;
1999 psymtab_include_list
= (char **)
2000 alloca ((includes_allocated
*= 2) *
2002 bcopy (orig
, psymtab_include_list
,
2003 includes_used
* sizeof (char *));
2009 /* Mark down an include file in the current psymtab */
2013 /* In C++, one may expect the same filename to come round many
2014 times, when code is coming alternately from the main file
2015 and from inline functions in other files. So I check to see
2016 if this is a file we've seen before -- either the main
2017 source file, or a previously included file.
2019 This seems to be a lot of time to be spending on N_SOL, but
2020 things like "break expread.y:435" need to work (I
2021 suppose the psymtab_include_list could be hashed or put
2022 in a binary tree, if profiling shows this is a major hog). */
2023 if (!strcmp (namestring
, pst
->filename
))
2027 for (i
= 0; i
< includes_used
; i
++)
2028 if (!strcmp (namestring
, psymtab_include_list
[i
]))
2037 psymtab_include_list
[includes_used
++] = namestring
;
2038 if (includes_used
>= includes_allocated
)
2040 char **orig
= psymtab_include_list
;
2042 psymtab_include_list
= (char **)
2043 alloca ((includes_allocated
*= 2) *
2045 bcopy (orig
, psymtab_include_list
,
2046 includes_used
* sizeof (char *));
2050 case N_LSYM
: /* Typedef or automatic variable. */
2053 p
= (char *) strchr (namestring
, ':');
2055 /* Skip if there is no :. */
2061 ADD_PSYMBOL_TO_LIST (namestring
, p
- namestring
,
2062 STRUCT_NAMESPACE
, LOC_TYPEDEF
,
2063 static_psymbols
, bufp
->n_value
);
2066 /* Also a typedef with the same name. */
2067 ADD_PSYMBOL_TO_LIST (namestring
, p
- namestring
,
2068 VAR_NAMESPACE
, LOC_TYPEDEF
,
2069 static_psymbols
, bufp
->n_value
);
2074 ADD_PSYMBOL_TO_LIST (namestring
, p
- namestring
,
2075 VAR_NAMESPACE
, LOC_TYPEDEF
,
2076 static_psymbols
, bufp
->n_value
);
2078 /* If this is an enumerated type, we need to
2079 add all the enum constants to the partial symbol
2080 table. This does not cover enums without names, e.g.
2081 "enum {a, b} c;" in C, but fortunately those are
2082 rare. There is no way for GDB to find those from the
2083 enum type without spending too much time on it. Thus
2084 to solve this problem, the compiler needs to put out separate
2085 constant symbols ('c' N_LSYMS) for enum constants in
2086 enums without names, or put out a dummy type. */
2088 /* We are looking for something of the form
2089 <name> ":" ("t" | "T") [<number> "="] "e"
2090 {<constant> ":" <value> ","} ";". */
2092 /* Skip over the colon and the 't' or 'T'. */
2094 /* This type may be given a number. Skip over it. */
2095 while ((*p
>= '0' && *p
<= '9')
2101 /* We have found an enumerated type. */
2102 /* According to comments in read_enum_type
2103 a comma could end it instead of a semicolon.
2104 I don't know where that happens.
2106 while (*p
&& *p
!= ';' && *p
!= ',')
2110 /* Check for and handle cretinous dbx symbol name
2113 p
= next_symbol_text ();
2115 /* Point to the character after the name
2116 of the enum constant. */
2117 for (q
= p
; *q
&& *q
!= ':'; q
++)
2119 /* Note that the value doesn't matter for
2120 enum constants in psymtabs, just in symtabs. */
2121 ADD_PSYMBOL_TO_LIST (p
, q
- p
,
2122 VAR_NAMESPACE
, LOC_CONST
,
2123 static_psymbols
, 0);
2124 /* Point past the name. */
2126 /* Skip over the value. */
2127 while (*p
&& *p
!= ',')
2129 /* Advance past the comma. */
2137 /* Constant, e.g. from "const" in Pascal. */
2138 ADD_PSYMBOL_TO_LIST (namestring
, p
- namestring
,
2139 VAR_NAMESPACE
, LOC_CONST
,
2140 static_psymbols
, bufp
->n_value
);
2143 /* Skip if the thing following the : is
2144 not a letter (which indicates declaration of a local
2145 variable, which we aren't interested in). */
2150 case N_GSYM
: /* Global (extern) variable; can be
2151 data or bss (sigh). */
2152 case N_STSYM
: /* Data seg var -- static */
2153 case N_LCSYM
: /* BSS " */
2155 case N_NBSTS
: /* Gould nobase. */
2156 case N_NBLCS
: /* symbols. */
2158 /* Following may probably be ignored; I'll leave them here
2159 for now (until I do Pascal and Modula 2 extensions). */
2161 case N_PC
: /* I may or may not need this; I
2163 case N_M2C
: /* I suspect that I can ignore this here. */
2164 case N_SCOPE
: /* Same. */
2168 p
= (char *) strchr (namestring
, ':');
2170 continue; /* Not a debugging symbol. */
2174 /* Main processing section for debugging symbols which
2175 the initial read through the symbol tables needs to worry
2176 about. If we reach this point, the symbol which we are
2177 considering is definitely one we are interested in.
2178 p must also contain the (valid) index into the namestring
2179 which indicates the debugging type symbol. */
2184 ADD_PSYMBOL_TO_LIST (namestring
, p
- namestring
,
2185 VAR_NAMESPACE
, LOC_CONST
,
2186 static_psymbols
, bufp
->n_value
);
2189 bufp
->n_value
+= addr
; /* Relocate */
2190 ADD_PSYMBOL_ADDR_TO_LIST (namestring
, p
- namestring
,
2191 VAR_NAMESPACE
, LOC_STATIC
,
2192 static_psymbols
, bufp
->n_value
);
2195 bufp
->n_value
+= addr
; /* Relocate */
2196 ADD_PSYMBOL_ADDR_TO_LIST (namestring
, p
- namestring
,
2197 VAR_NAMESPACE
, LOC_EXTERNAL
,
2198 global_psymbols
, bufp
->n_value
);
2202 ADD_PSYMBOL_TO_LIST (namestring
, p
- namestring
,
2203 VAR_NAMESPACE
, LOC_TYPEDEF
,
2204 global_psymbols
, bufp
->n_value
);
2208 ADD_PSYMBOL_TO_LIST (namestring
, p
- namestring
,
2209 VAR_NAMESPACE
, LOC_BLOCK
,
2210 static_psymbols
, bufp
->n_value
);
2213 /* Global functions were ignored here, but now they
2214 are put into the global psymtab like one would expect.
2215 They're also in the misc fn vector...
2216 FIXME, why did it used to ignore these? That broke
2217 "i fun" on these functions. */
2219 ADD_PSYMBOL_TO_LIST (namestring
, p
- namestring
,
2220 VAR_NAMESPACE
, LOC_BLOCK
,
2221 global_psymbols
, bufp
->n_value
);
2224 /* Two things show up here (hopefully); static symbols of
2225 local scope (static used inside braces) or extensions
2226 of structure symbols. We can ignore both. */
2242 /* Unexpected symbol. Ignore it; perhaps it is an extension
2243 that we don't know about.
2245 Someone says sun cc puts out symbols like
2246 /foo/baz/maclib::/usr/local/bin/maclib,
2247 which would get here with a symbol type of ':'. */
2255 /* Find the corresponding bincl and mark that psymtab on the
2256 psymtab dependency list */
2258 struct partial_symtab
*needed_pst
=
2259 find_corresponding_bincl_psymtab (namestring
, bufp
->n_value
);
2261 /* If this include file was defined earlier in this file,
2263 if (needed_pst
== pst
) continue;
2270 for (i
= 0; i
< dependencies_used
; i
++)
2271 if (dependency_list
[i
] == needed_pst
)
2277 /* If it's already in the list, skip the rest. */
2278 if (found
) continue;
2280 dependency_list
[dependencies_used
++] = needed_pst
;
2281 if (dependencies_used
>= dependencies_allocated
)
2283 struct partial_symtab
**orig
= dependency_list
;
2285 (struct partial_symtab
**)
2286 alloca ((dependencies_allocated
*= 2)
2287 * sizeof (struct partial_symtab
*));
2288 bcopy (orig
, dependency_list
,
2290 * sizeof (struct partial_symtab
*)));
2292 fprintf (stderr
, "Had to reallocate dependency list.\n");
2293 fprintf (stderr
, "New dependencies allocated: %d\n",
2294 dependencies_allocated
);
2299 error ("Invalid symbol data: \"repeated\" header file not previously seen, at symtab pos %d.",
2307 case N_SSYM
: /* Claim: Structure or union element.
2308 Hopefully, I can ignore this. */
2309 case N_ENTRY
: /* Alternate entry point; can ignore. */
2310 case N_MAIN
: /* Can definitely ignore this. */
2311 case N_CATCH
: /* These are GNU C++ extensions */
2312 case N_EHDECL
: /* that can safely be ignored here. */
2323 case N_NSYMS
: /* Ultrix 4.0: symbol count */
2324 /* These symbols aren't interesting; don't worry about them */
2329 /* If we haven't found it yet, ignore it. It's probably some
2330 new type we don't know about yet. */
2331 complain (&unknown_symtype_complaint
, bufp
->n_type
);
2336 /* If there's stuff to be cleaned up, clean it up. */
2337 if (entry_point
< bufp
->n_value
2338 && entry_point
>= last_o_file_start
)
2340 startup_file_start
= last_o_file_start
;
2341 startup_file_end
= bufp
->n_value
;
2346 end_psymtab (pst
, psymtab_include_list
, includes_used
,
2347 symnum
* sizeof (struct nlist
), end_of_text_addr
,
2348 dependency_list
, dependencies_used
,
2349 global_psymbols
.next
, static_psymbols
.next
);
2351 dependencies_used
= 0;
2352 pst
= (struct partial_symtab
*) 0;
2356 discard_cleanups (old_chain
);
2360 * Allocate and partially fill a partial symtab. It will be
2361 * completely filled at the end of the symbol list.
2363 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2364 is the address relative to which its symbols are (incremental) or 0
2366 static struct partial_symtab
*
2367 start_psymtab (symfile_name
, addr
,
2368 filename
, textlow
, ldsymoff
, global_syms
, static_syms
)
2374 struct partial_symbol
*global_syms
;
2375 struct partial_symbol
*static_syms
;
2377 struct partial_symtab
*result
=
2378 (struct partial_symtab
*) obstack_alloc (psymbol_obstack
,
2379 sizeof (struct partial_symtab
));
2381 result
->addr
= addr
;
2383 result
->symfile_name
=
2384 (char *) obstack_alloc (psymbol_obstack
,
2385 strlen (symfile_name
) + 1);
2386 strcpy (result
->symfile_name
, symfile_name
);
2389 (char *) obstack_alloc (psymbol_obstack
,
2390 strlen (filename
) + 1);
2391 strcpy (result
->filename
, filename
);
2393 result
->textlow
= textlow
;
2394 result
->ldsymoff
= ldsymoff
;
2398 result
->read_symtab
= dbx_psymtab_to_symtab
;
2400 result
->globals_offset
= global_syms
- global_psymbols
.list
;
2401 result
->statics_offset
= static_syms
- static_psymbols
.list
;
2403 result
->n_global_syms
= 0;
2404 result
->n_static_syms
= 0;
2411 compare_psymbols (s1
, s2
)
2412 register struct partial_symbol
*s1
, *s2
;
2415 *st1
= SYMBOL_NAME (s1
),
2416 *st2
= SYMBOL_NAME (s2
);
2418 return (st1
[0] - st2
[0] ? st1
[0] - st2
[0] :
2419 strcmp (st1
+ 1, st2
+ 1));
2423 /* Close off the current usage of a partial_symbol table entry. This
2424 involves setting the correct number of includes (with a realloc),
2425 setting the high text mark, setting the symbol length in the
2426 executable, and setting the length of the global and static lists
2429 The global symbols and static symbols are then seperately sorted.
2431 Then the partial symtab is put on the global list.
2432 *** List variables and peculiarities of same. ***
2435 end_psymtab (pst
, include_list
, num_includes
, capping_symbol_offset
,
2436 capping_text
, dependency_list
, number_dependencies
,
2437 capping_global
, capping_static
)
2438 struct partial_symtab
*pst
;
2439 char **include_list
;
2441 int capping_symbol_offset
;
2442 CORE_ADDR capping_text
;
2443 struct partial_symtab
**dependency_list
;
2444 int number_dependencies
;
2445 struct partial_symbol
*capping_global
, *capping_static
;
2449 pst
->ldsymlen
= capping_symbol_offset
- pst
->ldsymoff
;
2450 pst
->texthigh
= capping_text
;
2452 pst
->n_global_syms
=
2453 capping_global
- (global_psymbols
.list
+ pst
->globals_offset
);
2454 pst
->n_static_syms
=
2455 capping_static
- (static_psymbols
.list
+ pst
->statics_offset
);
2457 pst
->number_of_dependencies
= number_dependencies
;
2458 if (number_dependencies
)
2460 pst
->dependencies
= (struct partial_symtab
**)
2461 obstack_alloc (psymbol_obstack
,
2462 number_dependencies
* sizeof (struct partial_symtab
*));
2463 bcopy (dependency_list
, pst
->dependencies
,
2464 number_dependencies
* sizeof (struct partial_symtab
*));
2467 pst
->dependencies
= 0;
2469 for (i
= 0; i
< num_includes
; i
++)
2471 /* Eventually, put this on obstack */
2472 struct partial_symtab
*subpst
=
2473 (struct partial_symtab
*)
2474 obstack_alloc (psymbol_obstack
,
2475 sizeof (struct partial_symtab
));
2478 (char *) obstack_alloc (psymbol_obstack
,
2479 strlen (include_list
[i
]) + 1);
2480 strcpy (subpst
->filename
, include_list
[i
]);
2482 subpst
->symfile_name
= pst
->symfile_name
;
2483 subpst
->addr
= pst
->addr
;
2487 subpst
->texthigh
= 0;
2489 /* We could save slight bits of space by only making one of these,
2490 shared by the entire set of include files. FIXME-someday. */
2491 subpst
->dependencies
= (struct partial_symtab
**)
2492 obstack_alloc (psymbol_obstack
,
2493 sizeof (struct partial_symtab
*));
2494 subpst
->dependencies
[0] = pst
;
2495 subpst
->number_of_dependencies
= 1;
2497 subpst
->globals_offset
=
2498 subpst
->n_global_syms
=
2499 subpst
->statics_offset
=
2500 subpst
->n_static_syms
= 0;
2504 subpst
->read_symtab
= dbx_psymtab_to_symtab
;
2506 subpst
->next
= partial_symtab_list
;
2507 partial_symtab_list
= subpst
;
2510 /* Sort the global list; don't sort the static list */
2511 qsort (global_psymbols
.list
+ pst
->globals_offset
, pst
->n_global_syms
,
2512 sizeof (struct partial_symbol
), compare_psymbols
);
2514 /* If there is already a psymtab or symtab for a file of this name, remove it.
2515 (If there is a symtab, more drastic things also happen.)
2516 This happens in VxWorks. */
2517 free_named_symtabs (pst
->filename
);
2519 /* Put the psymtab on the psymtab list */
2520 pst
->next
= partial_symtab_list
;
2521 partial_symtab_list
= pst
;
2525 psymtab_to_symtab_1 (pst
, desc
, stringtab
, stringtab_size
, sym_offset
)
2526 struct partial_symtab
*pst
;
2532 struct cleanup
*old_chain
;
2540 fprintf (stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
2545 /* Read in all partial symbtabs on which this one is dependent */
2546 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2547 if (!pst
->dependencies
[i
]->readin
)
2549 /* Inform about additional files that need to be read in. */
2552 fputs_filtered (" ", stdout
);
2554 fputs_filtered ("and ", stdout
);
2556 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2557 wrap_here (""); /* Flush output */
2560 psymtab_to_symtab_1 (pst
->dependencies
[i
], desc
,
2561 stringtab
, stringtab_size
, sym_offset
);
2564 if (pst
->ldsymlen
) /* Otherwise it's a dummy */
2566 /* Init stuff necessary for reading in symbols */
2571 old_chain
= make_cleanup (really_free_pendings
, 0);
2573 /* Read in this files symbols */
2574 lseek (desc
, sym_offset
, L_SET
);
2575 read_ofile_symtab (desc
, stringtab
, stringtab_size
,
2577 pst
->ldsymlen
, pst
->textlow
,
2578 pst
->texthigh
- pst
->textlow
, pst
->addr
);
2579 sort_symtab_syms (symtab_list
); /* At beginning since just added */
2581 do_cleanups (old_chain
);
2588 * Read in all of the symbols for a given psymtab for real.
2589 * Be verbose about it if the user wants that.
2592 dbx_psymtab_to_symtab (pst
)
2593 struct partial_symtab
*pst
;
2598 struct stat statbuf
;
2599 struct cleanup
*old_chain
;
2608 fprintf (stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
2613 if (pst
->ldsymlen
|| pst
->number_of_dependencies
)
2615 /* Print the message now, before reading the string table,
2616 to avoid disconcerting pauses. */
2619 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
2623 /* Open symbol file and read in string table. Symbol_file_command
2624 guarantees that the symbol file name will be absolute, so there is
2625 no need for openp. */
2626 desc
= open(pst
->symfile_name
, O_RDONLY
, 0);
2629 perror_with_name (pst
->symfile_name
);
2631 sym_bfd
= bfd_fdopenr (pst
->symfile_name
, NULL
, desc
);
2635 error ("Could not open `%s' to read symbols: %s",
2636 pst
->symfile_name
, bfd_errmsg (bfd_error
));
2638 old_chain
= make_cleanup (bfd_close
, sym_bfd
);
2639 if (!bfd_check_format (sym_bfd
, bfd_object
))
2640 error ("\"%s\": can't read symbols: %s.",
2641 pst
->symfile_name
, bfd_errmsg (bfd_error
));
2643 /* We keep the string table for symfile resident in memory, but
2644 not the string table for any other symbol files. */
2645 if ((symfile
== 0) || 0 != strcmp(pst
->symfile_name
, symfile
))
2647 /* Read in the string table */
2649 /* FIXME, this uses internal BFD variables. See above in
2650 dbx_symbol_file_open where the macro is defined! */
2651 lseek (desc
, STRING_TABLE_OFFSET
, L_SET
);
2653 val
= myread (desc
, &st_temp
, sizeof st_temp
);
2655 perror_with_name (pst
->symfile_name
);
2656 stsize
= bfd_h_getlong (sym_bfd
, (unsigned char *)&st_temp
);
2657 if (fstat (desc
, &statbuf
) < 0)
2658 perror_with_name (pst
->symfile_name
);
2660 if (stsize
>= 0 && stsize
< statbuf
.st_size
)
2662 #ifdef BROKEN_LARGE_ALLOCA
2663 stringtab
= (char *) xmalloc (stsize
);
2664 make_cleanup (free
, stringtab
);
2666 stringtab
= (char *) alloca (stsize
);
2671 if (stringtab
== NULL
&& stsize
!= 0)
2672 error ("ridiculous string table size: %d bytes", stsize
);
2674 /* FIXME, this uses internal BFD variables. See above in
2675 dbx_symbol_file_open where the macro is defined! */
2676 val
= lseek (desc
, STRING_TABLE_OFFSET
, L_SET
);
2678 perror_with_name (pst
->symfile_name
);
2679 val
= myread (desc
, stringtab
, stsize
);
2681 perror_with_name (pst
->symfile_name
);
2685 stringtab
= symfile_string_table
;
2686 stsize
= symfile_string_table_size
;
2689 symfile_bfd
= sym_bfd
; /* Kludge for SWAP_SYMBOL */
2691 /* FIXME, this uses internal BFD variables. See above in
2692 dbx_symbol_file_open where the macro is defined! */
2693 psymtab_to_symtab_1 (pst
, desc
, stringtab
, stsize
,
2694 SYMBOL_TABLE_OFFSET
);
2696 /* Match with global symbols. This only needs to be done once,
2697 after all of the symtabs and dependencies have been read in. */
2698 scan_file_globals ();
2700 do_cleanups (old_chain
);
2702 /* Finish up the debug error message. */
2704 printf_filtered ("done.\n");
2709 * Scan through all of the global symbols defined in the object file,
2710 * assigning values to the debugging symbols that need to be assigned
2711 * to. Get these symbols from the misc function list.
2714 scan_file_globals ()
2719 for (mf
= 0; mf
< misc_function_count
; mf
++)
2721 char *namestring
= misc_function_vector
[mf
].name
;
2722 struct symbol
*sym
, *prev
;
2726 prev
= (struct symbol
*) 0;
2728 /* Get the hash index and check all the symbols
2729 under that hash index. */
2731 hash
= hashname (namestring
);
2733 for (sym
= global_sym_chain
[hash
]; sym
;)
2735 if (*namestring
== SYMBOL_NAME (sym
)[0]
2736 && !strcmp(namestring
+ 1, SYMBOL_NAME (sym
) + 1))
2738 /* Splice this symbol out of the hash chain and
2739 assign the value we have to it. */
2741 SYMBOL_VALUE_CHAIN (prev
) = SYMBOL_VALUE_CHAIN (sym
);
2743 global_sym_chain
[hash
] = SYMBOL_VALUE_CHAIN (sym
);
2745 /* Check to see whether we need to fix up a common block. */
2746 /* Note: this code might be executed several times for
2747 the same symbol if there are multiple references. */
2748 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
2749 fix_common_block (sym
, misc_function_vector
[mf
].address
);
2751 SYMBOL_VALUE_ADDRESS (sym
) = misc_function_vector
[mf
].address
;
2754 sym
= SYMBOL_VALUE_CHAIN (prev
);
2756 sym
= global_sym_chain
[hash
];
2761 sym
= SYMBOL_VALUE_CHAIN (sym
);
2767 /* Process a pair of symbols. Currently they must both be N_SO's. */
2769 process_symbol_pair (type1
, desc1
, value1
, name1
,
2770 type2
, desc2
, value2
, name2
)
2780 /* No need to check PCC_SOL_BROKEN, on the assumption that such
2781 broken PCC's don't put out N_SO pairs. */
2782 if (last_source_file
)
2783 end_symtab (value2
);
2784 start_symtab (name2
, name1
, value2
);
2788 * Read in a defined section of a specific object file's symbols.
2790 * DESC is the file descriptor for the file, positioned at the
2791 * beginning of the symtab
2792 * STRINGTAB is a pointer to the files string
2793 * table, already read in
2794 * SYM_OFFSET is the offset within the file of
2795 * the beginning of the symbols we want to read, NUM_SUMBOLS is the
2796 * number of symbols to read
2797 * TEXT_OFFSET is the beginning of the text segment we are reading symbols for
2798 * TEXT_SIZE is the size of the text segment read in.
2799 * OFFSET is a relocation offset which gets added to each symbol
2803 read_ofile_symtab (desc
, stringtab
, stringtab_size
, sym_offset
,
2804 sym_size
, text_offset
, text_size
, offset
)
2806 register char *stringtab
;
2807 unsigned int stringtab_size
;
2810 CORE_ADDR text_offset
;
2814 register char *namestring
;
2819 stringtab_global
= stringtab
;
2820 last_source_file
= 0;
2822 symtab_input_desc
= desc
;
2823 symbuf_end
= symbuf_idx
= 0;
2825 /* It is necessary to actually read one symbol *before* the start
2826 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2827 occurs before the N_SO symbol.
2829 Detecting this in read_dbx_symtab
2830 would slow down initial readin, so we look for it here instead. */
2831 if (sym_offset
>= (int)sizeof (struct nlist
))
2833 lseek (desc
, sym_offset
- sizeof (struct nlist
), L_INCR
);
2835 bufp
= &symbuf
[symbuf_idx
++];
2838 if (bufp
->n_un
.n_strx
< 0 || bufp
->n_un
.n_strx
>= stringtab_size
)
2839 error ("Invalid symbol data: bad string table offset: %d",
2841 namestring
= bufp
->n_un
.n_strx
+ stringtab
;
2843 processing_gcc_compilation
=
2844 (bufp
->n_type
== N_TEXT
2845 && !strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
));
2849 /* The N_SO starting this symtab is the first symbol, so we
2850 better not check the symbol before it. I'm not this can
2851 happen, but it doesn't hurt to check for it. */
2852 lseek(desc
, sym_offset
, L_INCR
);
2853 processing_gcc_compilation
= 0;
2856 if (symbuf_idx
== symbuf_end
)
2858 bufp
= &symbuf
[symbuf_idx
];
2859 if (bufp
->n_type
!= (unsigned char)N_SO
)
2860 error("First symbol in segment of executable not a source symbol");
2863 symnum
< sym_size
/ sizeof(struct nlist
);
2866 QUIT
; /* Allow this to be interruptable */
2867 if (symbuf_idx
== symbuf_end
)
2869 bufp
= &symbuf
[symbuf_idx
++];
2872 type
= bufp
->n_type
& N_TYPE
;
2873 if (type
== (unsigned char)N_CATCH
)
2875 /* N_CATCH is not fixed up by the linker, and unfortunately,
2876 there's no other place to put it in the .stab map. */
2877 bufp
->n_value
+= text_offset
+ offset
;
2879 else if (type
== N_TEXT
|| type
== N_DATA
|| type
== N_BSS
)
2880 bufp
->n_value
+= offset
;
2882 type
= bufp
->n_type
;
2883 if (bufp
->n_un
.n_strx
< 0 || bufp
->n_un
.n_strx
>= stringtab_size
)
2884 error ("Invalid symbol data: bad string table offset: %d",
2886 namestring
= bufp
->n_un
.n_strx
+ stringtab
;
2890 short desc
= bufp
->n_desc
;
2891 unsigned long valu
= bufp
->n_value
;
2893 /* Check for a pair of N_SO symbols. */
2894 if (type
== (unsigned char)N_SO
)
2896 if (symbuf_idx
== symbuf_end
)
2898 bufp
= &symbuf
[symbuf_idx
];
2899 if (bufp
->n_type
== (unsigned char)N_SO
)
2904 bufp
->n_value
+= offset
; /* Relocate */
2908 if (bufp
->n_un
.n_strx
< 0
2909 || bufp
->n_un
.n_strx
>= stringtab_size
)
2910 error ("Invalid symbol data: bad string table offset: %d",
2912 namestring2
= bufp
->n_un
.n_strx
+ stringtab
;
2914 process_symbol_pair (N_SO
, desc
, valu
, namestring
,
2915 N_SO
, bufp
->n_desc
, bufp
->n_value
,
2919 process_one_symbol(type
, desc
, valu
, namestring
);
2922 process_one_symbol (type
, desc
, valu
, namestring
);
2924 /* We skip checking for a new .o or -l file; that should never
2925 happen in this routine. */
2926 else if (type
== N_TEXT
2927 && !strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
))
2928 /* I don't think this code will ever be executed, because
2929 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2930 the N_SO symbol which starts this source file.
2931 However, there is no reason not to accept
2932 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2933 processing_gcc_compilation
= 1;
2934 else if (type
& N_EXT
|| type
== (unsigned char)N_TEXT
2935 || type
== (unsigned char)N_NBTEXT
2937 /* Global symbol: see if we came across a dbx defintion for
2938 a corresponding symbol. If so, store the value. Remove
2939 syms from the chain when their values are stored, but
2940 search the whole chain, as there may be several syms from
2941 different files with the same name. */
2942 /* This is probably not true. Since the files will be read
2943 in one at a time, each reference to a global symbol will
2944 be satisfied in each file as it appears. So we skip this
2948 end_symtab (text_offset
+ text_size
);
2955 register char *p
= name
;
2956 register int total
= p
[0];
2969 /* Ensure result is positive. */
2970 if (total
< 0) total
+= (1000 << 6);
2971 return total
% HASHSIZE
;
2976 process_one_symbol (type
, desc
, valu
, name
)
2981 #ifndef SUN_FIXED_LBRAC_BUG
2982 /* This records the last pc address we've seen. We depend on their being
2983 an SLINE or FUN or SO before the first LBRAC, since the variable does
2984 not get reset in between reads of different symbol files. */
2985 static CORE_ADDR last_pc_address
;
2987 register struct context_stack
*new;
2990 /* Something is wrong if we see real data before
2991 seeing a source file name. */
2993 if (last_source_file
== 0 && type
!= (unsigned char)N_SO
)
2995 /* Currently this ignores N_ENTRY on Gould machines, N_NSYM on machines
2996 where that code is defined. */
2997 if (IGNORE_SYMBOL (type
))
3000 /* FIXME, this should not be an error, since it precludes extending
3001 the symbol table information in this way... */
3002 error ("Invalid symbol data: does not start by identifying a source file.");
3009 /* Either of these types of symbols indicates the start of
3010 a new function. We must process its "name" normally for dbx,
3011 but also record the start of a new lexical context, and possibly
3012 also the end of the lexical context for the previous function. */
3013 /* This is not always true. This type of symbol may indicate a
3014 text segment variable. */
3016 #ifndef SUN_FIXED_LBRAC_BUG
3017 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
3020 colon_pos
= strchr (name
, ':');
3022 || (*colon_pos
!= 'f' && *colon_pos
!= 'F'))
3024 define_symbol (valu
, name
, desc
, type
);
3028 within_function
= 1;
3029 if (context_stack_depth
> 0)
3031 new = &context_stack
[--context_stack_depth
];
3032 /* Make a block for the local symbols within. */
3033 finish_block (new->name
, &local_symbols
, new->old_blocks
,
3034 new->start_addr
, valu
);
3036 /* Stack must be empty now. */
3037 if (context_stack_depth
!= 0)
3038 error ("Invalid symbol data: unmatched N_LBRAC before symtab pos %d.",
3041 new = &context_stack
[context_stack_depth
++];
3042 new->old_blocks
= pending_blocks
;
3043 new->start_addr
= valu
;
3044 new->name
= define_symbol (valu
, name
, desc
, type
);
3049 /* Record the address at which this catch takes place. */
3050 define_symbol (valu
, name
, desc
, type
);
3054 /* Don't know what to do with these yet. */
3055 error ("action uncertain for eh extensions");
3059 /* This "symbol" just indicates the start of an inner lexical
3060 context within a function. */
3062 #if !defined (BLOCK_ADDRESS_ABSOLUTE)
3063 /* On most machines, the block addresses are relative to the
3064 N_SO, the linker did not relocate them (sigh). */
3065 valu
+= last_source_start_addr
;
3068 #ifndef SUN_FIXED_LBRAC_BUG
3069 if (valu
< last_pc_address
) {
3070 /* Patch current LBRAC pc value to match last handy pc value */
3071 complain (&lbrac_complaint
, 0);
3072 valu
= last_pc_address
;
3075 if (context_stack_depth
== context_stack_size
)
3077 context_stack_size
*= 2;
3078 context_stack
= (struct context_stack
*)
3079 xrealloc (context_stack
,
3081 * sizeof (struct context_stack
)));
3084 new = &context_stack
[context_stack_depth
++];
3086 new->locals
= local_symbols
;
3087 new->old_blocks
= pending_blocks
;
3088 new->start_addr
= valu
;
3094 /* This "symbol" just indicates the end of an inner lexical
3095 context that was started with N_LBRAC. */
3097 #if !defined (BLOCK_ADDRESS_ABSOLUTE)
3098 /* On most machines, the block addresses are relative to the
3099 N_SO, the linker did not relocate them (sigh). */
3100 valu
+= last_source_start_addr
;
3103 new = &context_stack
[--context_stack_depth
];
3104 if (desc
!= new->depth
)
3105 error ("Invalid symbol data: N_LBRAC/N_RBRAC symbol mismatch, symtab pos %d.", symnum
);
3107 /* Some compilers put the variable decls inside of an
3108 LBRAC/RBRAC block. This macro should be nonzero if this
3109 is true. DESC is N_DESC from the N_RBRAC symbol.
3110 GCC_P is true if we've detected the GCC_COMPILED_SYMBOL. */
3111 #if !defined (VARIABLES_INSIDE_BLOCK)
3112 #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0
3115 /* Can only use new->locals as local symbols here if we're in
3116 gcc or on a machine that puts them before the lbrack. */
3117 if (!VARIABLES_INSIDE_BLOCK(desc
, processing_gcc_compilation
))
3118 local_symbols
= new->locals
;
3120 /* If this is not the outermost LBRAC...RBRAC pair in the
3121 function, its local symbols preceded it, and are the ones
3122 just recovered from the context stack. Defined the block for them.
3124 If this is the outermost LBRAC...RBRAC pair, there is no
3125 need to do anything; leave the symbols that preceded it
3126 to be attached to the function's own block. However, if
3127 it is so, we need to indicate that we just moved outside
3130 && (context_stack_depth
3131 > !VARIABLES_INSIDE_BLOCK(desc
, processing_gcc_compilation
)))
3133 /* FIXME Muzzle a compiler bug that makes end < start. */
3134 if (new->start_addr
> valu
)
3136 complain(&lbrac_rbrac_complaint
, 0);
3137 new->start_addr
= valu
;
3139 /* Make a block for the local symbols within. */
3140 finish_block (0, &local_symbols
, new->old_blocks
,
3141 new->start_addr
, valu
);
3145 within_function
= 0;
3147 if (VARIABLES_INSIDE_BLOCK(desc
, processing_gcc_compilation
))
3148 /* Now pop locals of block just finished. */
3149 local_symbols
= new->locals
;
3153 /* This kind of symbol supposedly indicates the start
3154 of an object file. In fact this type does not appear. */
3158 /* This type of symbol indicates the start of data
3159 for one source file.
3160 Finish the symbol table of the previous source file
3161 (if any) and start accumulating a new symbol table. */
3162 #ifndef SUN_FIXED_LBRAC_BUG
3163 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
3166 #ifdef PCC_SOL_BROKEN
3167 /* pcc bug, occasionally puts out SO for SOL. */
3168 if (context_stack_depth
> 0)
3170 start_subfile (name
, NULL
);
3174 if (last_source_file
)
3176 start_symtab (name
, NULL
, valu
);
3180 /* This type of symbol indicates the start of data for
3181 a sub-source-file, one whose contents were copied or
3182 included in the compilation of the main source file
3183 (whose name was given in the N_SO symbol.) */
3184 start_subfile (name
, NULL
);
3189 add_new_header_file (name
, valu
);
3190 start_subfile (name
, NULL
);
3194 start_subfile (pop_subfile (), NULL
);
3198 add_old_header_file (name
, valu
);
3202 /* This type of "symbol" really just records
3203 one line-number -- core-address correspondence.
3204 Enter it in the line list for this symbol table. */
3205 #ifndef SUN_FIXED_LBRAC_BUG
3206 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
3208 record_line (desc
, valu
);
3213 error ("Invalid symbol data: common within common at symtab pos %d",
3215 common_block
= local_symbols
;
3216 common_block_i
= local_symbols
? local_symbols
->nsyms
: 0;
3220 /* Symbols declared since the BCOMM are to have the common block
3221 start address added in when we know it. common_block points to
3222 the first symbol after the BCOMM in the local_symbols list;
3223 copy the list and hang it off the symbol for the common block name
3227 struct symbol
*sym
=
3228 (struct symbol
*) xmalloc (sizeof (struct symbol
));
3229 bzero (sym
, sizeof *sym
);
3230 SYMBOL_NAME (sym
) = savestring (name
, strlen (name
));
3231 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
3232 SYMBOL_NAMESPACE (sym
) = (enum namespace)((long)
3233 copy_pending (local_symbols
, common_block_i
, common_block
));
3234 i
= hashname (SYMBOL_NAME (sym
));
3235 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
3236 global_sym_chain
[i
] = sym
;
3247 define_symbol (valu
, name
, desc
, type
);
3251 /* Read a number by which a type is referred to in dbx data,
3252 or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
3253 Just a single number N is equivalent to (0,N).
3254 Return the two numbers by storing them in the vector TYPENUMS.
3255 TYPENUMS will then be used as an argument to dbx_lookup_type. */
3258 read_type_number (pp
, typenums
)
3260 register int *typenums
;
3265 typenums
[0] = read_number (pp
, ',');
3266 typenums
[1] = read_number (pp
, ')');
3271 typenums
[1] = read_number (pp
, 0);
3275 /* To handle GNU C++ typename abbreviation, we need to be able to
3276 fill in a type's name as soon as space for that type is allocated.
3277 `type_synonym_name' is the name of the type being allocated.
3278 It is cleared as soon as it is used (lest all allocated types
3280 static char *type_synonym_name
;
3282 static struct symbol
*
3283 define_symbol (valu
, string
, desc
, type
)
3289 register struct symbol
*sym
;
3290 char *p
= (char *) strchr (string
, ':');
3295 /* Ignore syms with empty names. */
3299 /* Ignore old-style symbols from cc -go */
3303 sym
= (struct symbol
*)obstack_alloc (symbol_obstack
, sizeof (struct symbol
));
3305 if (processing_gcc_compilation
) {
3306 /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
3307 number of bytes occupied by a type or object, which we ignore. */
3308 SYMBOL_LINE(sym
) = desc
;
3310 SYMBOL_LINE(sym
) = 0; /* unknown */
3313 if (string
[0] == CPLUS_MARKER
)
3315 /* Special GNU C++ names. */
3319 SYMBOL_NAME (sym
) = "this";
3321 case 'v': /* $vtbl_ptr_type */
3322 /* Was: SYMBOL_NAME (sym) = "vptr"; */
3325 SYMBOL_NAME (sym
) = "eh_throw";
3329 /* This was an anonymous type that was never fixed up. */
3340 = (char *) obstack_alloc (symbol_obstack
, ((p
- string
) + 1));
3341 /* Open-coded bcopy--saves function call time. */
3343 register char *p1
= string
;
3344 register char *p2
= SYMBOL_NAME (sym
);
3351 /* Determine the type of name being defined. */
3352 /* The Acorn RISC machine's compiler can put out locals that don't
3353 start with "234=" or "(3,4)=", so assume anything other than the
3354 deftypes we know how to handle is a local. */
3355 /* (Peter Watkins @ Computervision)
3356 Handle Sun-style local fortran array types 'ar...' .
3357 (gnu@cygnus.com) -- this strchr() handles them properly?
3358 (tiemann@cygnus.com) -- 'C' is for catch. */
3359 if (!strchr ("cfFGpPrStTvVXC", *p
))
3364 /* c is a special case, not followed by a type-number.
3365 SYMBOL:c=iVALUE for an integer constant symbol.
3366 SYMBOL:c=rVALUE for a floating constant symbol.
3367 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
3368 e.g. "b:c=e6,0" for "const b = blob1"
3369 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
3373 error ("Invalid symbol data at symtab pos %d.", symnum
);
3378 double d
= atof (p
);
3381 SYMBOL_TYPE (sym
) = builtin_type_double
;
3382 valu
= (char *) obstack_alloc (symbol_obstack
, sizeof (double));
3383 bcopy (&d
, valu
, sizeof (double));
3384 SWAP_TARGET_AND_HOST (valu
, sizeof (double));
3385 SYMBOL_VALUE_BYTES (sym
) = valu
;
3386 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
3391 SYMBOL_TYPE (sym
) = builtin_type_int
;
3392 SYMBOL_VALUE (sym
) = atoi (p
);
3393 SYMBOL_CLASS (sym
) = LOC_CONST
;
3397 /* SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
3398 e.g. "b:c=e6,0" for "const b = blob1"
3399 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
3403 read_type_number (&p
, typenums
);
3405 error ("Invalid symbol data: no comma in enum const symbol");
3407 SYMBOL_TYPE (sym
) = *dbx_lookup_type (typenums
);
3408 SYMBOL_VALUE (sym
) = atoi (p
);
3409 SYMBOL_CLASS (sym
) = LOC_CONST
;
3413 error ("Invalid symbol data at symtab pos %d.", symnum
);
3415 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
3416 add_symbol_to_list (sym
, &file_symbols
);
3420 /* Now usually comes a number that says which data type,
3421 and possibly more stuff to define the type
3422 (all of which is handled by read_type) */
3424 if (deftype
== 'p' && *p
== 'F')
3425 /* pF is a two-letter code that means a function parameter in Fortran.
3426 The type-number specifies the type of the return value.
3427 Translate it into a pointer-to-function type. */
3431 = lookup_pointer_type (lookup_function_type (read_type (&p
)));
3436 synonym
= *p
== 't';
3441 type_synonym_name
= obsavestring (SYMBOL_NAME (sym
),
3442 strlen (SYMBOL_NAME (sym
)));
3445 type
= read_type (&p
);
3447 if ((deftype
== 'F' || deftype
== 'f')
3448 && TYPE_CODE (type
) != TYPE_CODE_FUNC
)
3449 SYMBOL_TYPE (sym
) = lookup_function_type (type
);
3451 SYMBOL_TYPE (sym
) = type
;
3457 /* The name of a caught exception. */
3458 SYMBOL_CLASS (sym
) = LOC_LABEL
;
3459 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
3460 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
3461 add_symbol_to_list (sym
, &local_symbols
);
3465 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
3466 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
3467 add_symbol_to_list (sym
, &file_symbols
);
3471 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
3472 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
3473 add_symbol_to_list (sym
, &global_symbols
);
3477 /* For a class G (global) symbol, it appears that the
3478 value is not correct. It is necessary to search for the
3479 corresponding linker definition to find the value.
3480 These definitions appear at the end of the namelist. */
3481 i
= hashname (SYMBOL_NAME (sym
));
3482 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
3483 global_sym_chain
[i
] = sym
;
3484 SYMBOL_CLASS (sym
) = LOC_STATIC
;
3485 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
3486 add_symbol_to_list (sym
, &global_symbols
);
3489 /* This case is faked by a conditional above,
3490 when there is no code letter in the dbx data.
3491 Dbx data never actually contains 'l'. */
3493 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
3494 SYMBOL_VALUE (sym
) = valu
;
3495 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
3496 add_symbol_to_list (sym
, &local_symbols
);
3500 /* Normally this is a parameter, a LOC_ARG. On the i960, it
3501 can also be a LOC_LOCAL_ARG depending on symbol type. */
3502 #ifndef DBX_PARM_SYMBOL_CLASS
3503 #define DBX_PARM_SYMBOL_CLASS(type) LOC_ARG
3505 SYMBOL_CLASS (sym
) = DBX_PARM_SYMBOL_CLASS (type
);
3506 SYMBOL_VALUE (sym
) = valu
;
3507 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
3508 add_symbol_to_list (sym
, &local_symbols
);
3510 /* If it's gcc-compiled, if it says `short', believe it. */
3511 if (processing_gcc_compilation
|| BELIEVE_PCC_PROMOTION
)
3514 #if defined(BELIEVE_PCC_PROMOTION_TYPE)
3515 /* This macro is defined on machines (e.g. sparc) where
3516 we should believe the type of a PCC 'short' argument,
3517 but shouldn't believe the address (the address is
3518 the address of the corresponding int). Note that
3519 this is only different from the BELIEVE_PCC_PROMOTION
3520 case on big-endian machines.
3522 My guess is that this correction, as opposed to changing
3523 the parameter to an 'int' (as done below, for PCC
3524 on most machines), is the right thing to do
3525 on all machines, but I don't want to risk breaking
3526 something that already works. On most PCC machines,
3527 the sparc problem doesn't come up because the calling
3528 function has to zero the top bytes (not knowing whether
3529 the called function wants an int or a short), so there
3530 is no practical difference between an int and a short
3531 (except perhaps what happens when the GDB user types
3532 "print short_arg = 0x10000;").
3534 Hacked for SunOS 4.1 by gnu@cygnus.com. In 4.1, the compiler
3535 actually produces the correct address (we don't need to fix it
3536 up). I made this code adapt so that it will offset the symbol
3537 if it was pointing at an int-aligned location and not
3538 otherwise. This way you can use the same gdb for 4.0.x and
3541 if (0 == SYMBOL_VALUE (sym
) % sizeof (int))
3543 if (SYMBOL_TYPE (sym
) == builtin_type_char
3544 || SYMBOL_TYPE (sym
) == builtin_type_unsigned_char
)
3545 SYMBOL_VALUE (sym
) += 3;
3546 else if (SYMBOL_TYPE (sym
) == builtin_type_short
3547 || SYMBOL_TYPE (sym
) == builtin_type_unsigned_short
)
3548 SYMBOL_VALUE (sym
) += 2;
3552 #else /* no BELIEVE_PCC_PROMOTION_TYPE. */
3554 /* If PCC says a parameter is a short or a char,
3555 it is really an int. */
3556 if (SYMBOL_TYPE (sym
) == builtin_type_char
3557 || SYMBOL_TYPE (sym
) == builtin_type_short
)
3558 SYMBOL_TYPE (sym
) = builtin_type_int
;
3559 else if (SYMBOL_TYPE (sym
) == builtin_type_unsigned_char
3560 || SYMBOL_TYPE (sym
) == builtin_type_unsigned_short
)
3561 SYMBOL_TYPE (sym
) = builtin_type_unsigned_int
;
3564 #endif /* no BELIEVE_PCC_PROMOTION_TYPE. */
3567 SYMBOL_CLASS (sym
) = LOC_REGPARM
;
3568 SYMBOL_VALUE (sym
) = STAB_REG_TO_REGNUM (valu
);
3569 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
3570 add_symbol_to_list (sym
, &local_symbols
);
3574 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
3575 SYMBOL_VALUE (sym
) = STAB_REG_TO_REGNUM (valu
);
3576 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
3577 add_symbol_to_list (sym
, &local_symbols
);
3581 /* Static symbol at top level of file */
3582 SYMBOL_CLASS (sym
) = LOC_STATIC
;
3583 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
3584 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
3585 add_symbol_to_list (sym
, &file_symbols
);
3589 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
3590 SYMBOL_VALUE (sym
) = valu
;
3591 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
3592 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0
3593 && (TYPE_FLAGS (SYMBOL_TYPE (sym
)) & TYPE_FLAG_PERM
) == 0)
3594 TYPE_NAME (SYMBOL_TYPE (sym
)) =
3595 obsavestring (SYMBOL_NAME (sym
),
3596 strlen (SYMBOL_NAME (sym
)));
3597 /* C++ vagaries: we may have a type which is derived from
3598 a base type which did not have its name defined when the
3599 derived class was output. We fill in the derived class's
3600 base part member's name here in that case. */
3601 else if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_STRUCT
3602 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_UNION
)
3603 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)))
3606 for (i
= TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)) - 1; i
>= 0; i
--)
3607 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), i
) == 0)
3608 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), i
) =
3609 type_name_no_tag (TYPE_BASECLASS (SYMBOL_TYPE (sym
), i
));
3612 add_symbol_to_list (sym
, &file_symbols
);
3616 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
3617 SYMBOL_VALUE (sym
) = valu
;
3618 SYMBOL_NAMESPACE (sym
) = STRUCT_NAMESPACE
;
3619 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0
3620 && (TYPE_FLAGS (SYMBOL_TYPE (sym
)) & TYPE_FLAG_PERM
) == 0)
3621 TYPE_NAME (SYMBOL_TYPE (sym
))
3623 (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_ENUM
3625 : (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_STRUCT
3626 ? "struct " : "union ")),
3628 add_symbol_to_list (sym
, &file_symbols
);
3632 register struct symbol
*typedef_sym
3633 = (struct symbol
*) obstack_alloc (symbol_obstack
, sizeof (struct symbol
));
3634 SYMBOL_NAME (typedef_sym
) = SYMBOL_NAME (sym
);
3635 SYMBOL_TYPE (typedef_sym
) = SYMBOL_TYPE (sym
);
3637 SYMBOL_CLASS (typedef_sym
) = LOC_TYPEDEF
;
3638 SYMBOL_VALUE (typedef_sym
) = valu
;
3639 SYMBOL_NAMESPACE (typedef_sym
) = VAR_NAMESPACE
;
3640 add_symbol_to_list (typedef_sym
, &file_symbols
);
3645 /* Static symbol of local scope */
3646 SYMBOL_CLASS (sym
) = LOC_STATIC
;
3647 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
3648 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
3649 add_symbol_to_list (sym
, &local_symbols
);
3653 /* Reference parameter */
3654 SYMBOL_CLASS (sym
) = LOC_REF_ARG
;
3655 SYMBOL_VALUE (sym
) = valu
;
3656 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
3657 add_symbol_to_list (sym
, &local_symbols
);
3661 /* This is used by Sun FORTRAN for "function result value".
3662 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
3663 that Pascal uses it too, but when I tried it Pascal used
3664 "x:3" (local symbol) instead. */
3665 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
3666 SYMBOL_VALUE (sym
) = valu
;
3667 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
3668 add_symbol_to_list (sym
, &local_symbols
);
3672 error ("Invalid symbol data: unknown symbol-type code `%c' at symtab pos %d.", deftype
, symnum
);
3677 /* What about types defined as forward references inside of a small lexical
3679 /* Add a type to the list of undefined types to be checked through
3680 once this file has been read in. */
3682 add_undefined_type (type
)
3685 if (undef_types_length
== undef_types_allocated
)
3687 undef_types_allocated
*= 2;
3688 undef_types
= (struct type
**)
3689 xrealloc (undef_types
,
3690 undef_types_allocated
* sizeof (struct type
*));
3692 undef_types
[undef_types_length
++] = type
;
3695 /* Add here something to go through each undefined type, see if it's
3696 still undefined, and do a full lookup if so. */
3698 cleanup_undefined_types ()
3702 for (type
= undef_types
; type
< undef_types
+ undef_types_length
; type
++)
3704 /* Reasonable test to see if it's been defined since. */
3705 if (TYPE_NFIELDS (*type
) == 0)
3707 struct pending
*ppt
;
3709 /* Name of the type, without "struct" or "union" */
3710 char *typename
= TYPE_NAME (*type
);
3712 if (!strncmp (typename
, "struct ", 7))
3714 if (!strncmp (typename
, "union ", 6))
3717 for (ppt
= file_symbols
; ppt
; ppt
= ppt
->next
)
3718 for (i
= 0; i
< ppt
->nsyms
; i
++)
3720 struct symbol
*sym
= ppt
->symbol
[i
];
3722 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
3723 && SYMBOL_NAMESPACE (sym
) == STRUCT_NAMESPACE
3724 && (TYPE_CODE (SYMBOL_TYPE (sym
)) ==
3726 && !strcmp (SYMBOL_NAME (sym
), typename
))
3727 bcopy (SYMBOL_TYPE (sym
), *type
, sizeof (struct type
));
3731 /* It has been defined; don't mark it as a stub. */
3732 TYPE_FLAGS (*type
) &= ~TYPE_FLAG_STUB
;
3734 undef_types_length
= 0;
3737 /* Skip rest of this symbol and return an error type.
3739 General notes on error recovery: error_type always skips to the
3740 end of the symbol (modulo cretinous dbx symbol name continuation).
3741 Thus code like this:
3743 if (*(*pp)++ != ';')
3744 return error_type (pp);
3746 is wrong because if *pp starts out pointing at '\0' (typically as the
3747 result of an earlier error), it will be incremented to point to the
3748 start of the next symbol, which might produce strange results, at least
3749 if you run off the end of the string table. Instead use
3752 return error_type (pp);
3758 foo = error_type (pp);
3762 And in case it isn't obvious, the point of all this hair is so the compiler
3763 can define new types and new syntaxes, and old versions of the
3764 debugger will be able to read the new symbol tables. */
3766 static struct type
*
3770 complain (&error_type_complaint
, 0);
3773 /* Skip to end of symbol. */
3774 while (**pp
!= '\0')
3777 /* Check for and handle cretinous dbx symbol name continuation! */
3778 if ((*pp
)[-1] == '\\')
3779 *pp
= next_symbol_text ();
3783 return builtin_type_error
;
3786 /* Read a dbx type reference or definition;
3787 return the type that is meant.
3788 This can be just a number, in which case it references
3789 a type already defined and placed in type_vector.
3790 Or the number can be followed by an =, in which case
3791 it means to define a new type according to the text that
3799 register struct type
*type
= 0;
3804 /* Read type number if present. The type number may be omitted.
3805 for instance in a two-dimensional array declared with type
3806 "ar1;1;10;ar1;1;10;4". */
3807 if ((**pp
>= '0' && **pp
<= '9')
3810 read_type_number (pp
, typenums
);
3812 /* Detect random reference to type not yet defined.
3813 Allocate a type object but leave it zeroed. */
3815 return dbx_alloc_type (typenums
);
3821 /* 'typenums=' not present, type is anonymous. Read and return
3822 the definition, but don't put it in the type vector. */
3823 typenums
[0] = typenums
[1] = -1;
3831 enum type_code code
;
3833 /* Used to index through file_symbols. */
3834 struct pending
*ppt
;
3837 /* Name including "struct", etc. */
3840 /* Name without "struct", etc. */
3841 char *type_name_only
;
3847 /* Set the type code according to the following letter. */
3851 code
= TYPE_CODE_STRUCT
;
3855 code
= TYPE_CODE_UNION
;
3859 code
= TYPE_CODE_ENUM
;
3863 return error_type (pp
);
3866 to
= type_name
= (char *)
3867 obstack_alloc (symbol_obstack
,
3869 ((char *) strchr (*pp
, ':') - (*pp
)) + 1));
3871 /* Copy the prefix. */
3873 while (*to
++ = *from
++)
3877 type_name_only
= to
;
3879 /* Copy the name. */
3881 while ((*to
++ = *from
++) != ':')
3885 /* Set the pointer ahead of the name which we just read. */
3889 /* The following hack is clearly wrong, because it doesn't
3890 check whether we are in a baseclass. I tried to reproduce
3891 the case that it is trying to fix, but I couldn't get
3892 g++ to put out a cross reference to a basetype. Perhaps
3893 it doesn't do it anymore. */
3894 /* Note: for C++, the cross reference may be to a base type which
3895 has not yet been seen. In this case, we skip to the comma,
3896 which will mark the end of the base class name. (The ':'
3897 at the end of the base class name will be skipped as well.)
3898 But sometimes (ie. when the cross ref is the last thing on
3899 the line) there will be no ','. */
3900 from
= (char *) strchr (*pp
, ',');
3906 /* Now check to see whether the type has already been declared. */
3907 /* This is necessary at least in the case where the
3908 program says something like
3910 The compiler puts out a cross-reference; we better find
3911 set the length of the structure correctly so we can
3912 set the length of the array. */
3913 for (ppt
= file_symbols
; ppt
; ppt
= ppt
->next
)
3914 for (i
= 0; i
< ppt
->nsyms
; i
++)
3916 struct symbol
*sym
= ppt
->symbol
[i
];
3918 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
3919 && SYMBOL_NAMESPACE (sym
) == STRUCT_NAMESPACE
3920 && (TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
3921 && !strcmp (SYMBOL_NAME (sym
), type_name_only
))
3923 obstack_free (symbol_obstack
, type_name
);
3924 type
= SYMBOL_TYPE (sym
);
3929 /* Didn't find the type to which this refers, so we must
3930 be dealing with a forward reference. Allocate a type
3931 structure for it, and keep track of it so we can
3932 fill in the rest of the fields when we get the full
3934 type
= dbx_alloc_type (typenums
);
3935 TYPE_CODE (type
) = code
;
3936 TYPE_NAME (type
) = type_name
;
3938 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB
;
3940 add_undefined_type (type
);
3956 read_type_number (pp
, xtypenums
);
3957 type
= *dbx_lookup_type (xtypenums
);
3959 type
= builtin_type_void
;
3960 if (typenums
[0] != -1)
3961 *dbx_lookup_type (typenums
) = type
;
3965 type1
= read_type (pp
);
3966 type
= lookup_pointer_type (type1
);
3967 if (typenums
[0] != -1)
3968 *dbx_lookup_type (typenums
) = type
;
3973 struct type
*domain
= read_type (pp
);
3974 struct type
*memtype
;
3977 /* Invalid member type data format. */
3978 return error_type (pp
);
3981 memtype
= read_type (pp
);
3982 type
= dbx_alloc_type (typenums
);
3983 smash_to_member_type (type
, domain
, memtype
);
3988 if ((*pp
)[0] == '#')
3990 /* We'll get the parameter types from the name. */
3991 struct type
*return_type
;
3994 return_type
= read_type (pp
);
3995 if (*(*pp
)++ != ';')
3996 complain (&invalid_member_complaint
, symnum
);
3997 type
= allocate_stub_method (return_type
);
3998 if (typenums
[0] != -1)
3999 *dbx_lookup_type (typenums
) = type
;
4003 struct type
*domain
= read_type (pp
);
4004 struct type
*return_type
;
4007 if (*(*pp
)++ != ',')
4008 error ("invalid member type data format, at symtab pos %d.",
4011 return_type
= read_type (pp
);
4012 args
= read_args (pp
, ';');
4013 type
= dbx_alloc_type (typenums
);
4014 smash_to_method_type (type
, domain
, return_type
, args
);
4019 type1
= read_type (pp
);
4020 type
= lookup_reference_type (type1
);
4021 if (typenums
[0] != -1)
4022 *dbx_lookup_type (typenums
) = type
;
4026 type1
= read_type (pp
);
4027 type
= lookup_function_type (type1
);
4028 if (typenums
[0] != -1)
4029 *dbx_lookup_type (typenums
) = type
;
4033 type
= read_range_type (pp
, typenums
);
4034 if (typenums
[0] != -1)
4035 *dbx_lookup_type (typenums
) = type
;
4039 type
= dbx_alloc_type (typenums
);
4040 type
= read_enum_type (pp
, type
);
4041 *dbx_lookup_type (typenums
) = type
;
4045 type
= dbx_alloc_type (typenums
);
4046 TYPE_NAME (type
) = type_synonym_name
;
4047 type_synonym_name
= 0;
4048 type
= read_struct_type (pp
, type
);
4052 type
= dbx_alloc_type (typenums
);
4053 TYPE_NAME (type
) = type_synonym_name
;
4054 type_synonym_name
= 0;
4055 type
= read_struct_type (pp
, type
);
4056 TYPE_CODE (type
) = TYPE_CODE_UNION
;
4061 return error_type (pp
);
4064 type
= dbx_alloc_type (typenums
);
4065 type
= read_array_type (pp
, type
);
4069 return error_type (pp
);
4076 /* If this is an overriding temporary alteration for a header file's
4077 contents, and this type number is unknown in the global definition,
4078 put this type into the global definition at this type number. */
4079 if (header_file_prev_index
>= 0)
4081 register struct type
**tp
4082 = explicit_lookup_type (header_file_prev_index
, typenums
[1]);
4091 /* This would be a good idea, but it doesn't really work. The problem
4092 is that in order to get the virtual context for a particular type,
4093 you need to know the virtual info from all of its basetypes,
4094 and you need to have processed its methods. Since GDB reads
4095 symbols on a file-by-file basis, this means processing the symbols
4096 of all the files that are needed for each baseclass, which
4097 means potentially reading in all the debugging info just to fill
4098 in information we may never need. */
4100 /* This page contains subroutines of read_type. */
4102 /* FOR_TYPE is a struct type defining a virtual function NAME with type
4103 FN_TYPE. The `virtual context' for this virtual function is the
4104 first base class of FOR_TYPE in which NAME is defined with signature
4105 matching FN_TYPE. OFFSET serves as a hash on matches here.
4107 TYPE is the current type in which we are searching. */
4109 static struct type
*
4110 virtual_context (for_type
, type
, name
, fn_type
, offset
)
4111 struct type
*for_type
, *type
;
4113 struct type
*fn_type
;
4116 struct type
*basetype
= 0;
4119 if (for_type
!= type
)
4121 /* Check the methods of TYPE. */
4122 /* Need to do a check_stub_type here, but that breaks
4123 things because we can get infinite regress. */
4124 for (i
= TYPE_NFN_FIELDS (type
) - 1; i
>= 0; --i
)
4125 if (!strcmp (TYPE_FN_FIELDLIST_NAME (type
, i
), name
))
4129 int j
= TYPE_FN_FIELDLIST_LENGTH (type
, i
);
4130 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, i
);
4133 if (TYPE_FN_FIELD_VOFFSET (f
, j
) == offset
-1)
4134 return TYPE_FN_FIELD_FCONTEXT (f
, j
);
4137 for (i
= TYPE_N_BASECLASSES (type
) - 1; i
>= 0; i
--)
4139 basetype
= virtual_context (for_type
, TYPE_BASECLASS (type
, i
), name
,
4141 if (basetype
!= for_type
)
4148 /* Read the description of a structure (or union type)
4149 and return an object describing the type. */
4151 static struct type
*
4152 read_struct_type (pp
, type
)
4154 register struct type
*type
;
4156 /* Total number of methods defined in this class.
4157 If the class defines two `f' methods, and one `g' method,
4158 then this will have the value 3. */
4159 int total_length
= 0;
4163 struct nextfield
*next
;
4164 int visibility
; /* 0=public, 1=protected, 2=public */
4170 struct next_fnfield
*next
;
4171 int visibility
; /* 0=public, 1=protected, 2=public */
4172 struct fn_field fn_field
;
4175 struct next_fnfieldlist
4177 struct next_fnfieldlist
*next
;
4178 struct fn_fieldlist fn_fieldlist
;
4181 register struct nextfield
*list
= 0;
4182 struct nextfield
*new;
4187 register struct next_fnfieldlist
*mainlist
= 0;
4190 if (TYPE_MAIN_VARIANT (type
) == 0)
4192 TYPE_MAIN_VARIANT (type
) = type
;
4195 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
4197 /* First comes the total size in bytes. */
4199 TYPE_LENGTH (type
) = read_number (pp
, 0);
4201 /* C++: Now, if the class is a derived class, then the next character
4202 will be a '!', followed by the number of base classes derived from.
4203 Each element in the list contains visibility information,
4204 the offset of this base class in the derived structure,
4205 and then the base type. */
4208 int i
, n_baseclasses
, offset
;
4209 struct type
*baseclass
;
4212 /* Nonzero if it is a virtual baseclass, i.e.,
4216 struct C : public B, public virtual A {};
4218 B is a baseclass of C; A is a virtual baseclass for C. This is a C++
4219 2.0 language feature. */
4224 n_baseclasses
= read_number (pp
, ',');
4225 TYPE_FIELD_VIRTUAL_BITS (type
) =
4226 (B_TYPE
*) obstack_alloc (symbol_obstack
, B_BYTES (n_baseclasses
));
4227 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), n_baseclasses
);
4229 for (i
= 0; i
< n_baseclasses
; i
++)
4232 *pp
= next_symbol_text ();
4243 /* Bad visibility format. */
4244 return error_type (pp
);
4257 /* Bad visibility format. */
4258 return error_type (pp
);
4261 SET_TYPE_FIELD_VIRTUAL (type
, i
);
4264 /* Offset of the portion of the object corresponding to
4265 this baseclass. Always zero in the absence of
4266 multiple inheritance. */
4267 offset
= read_number (pp
, ',');
4268 baseclass
= read_type (pp
);
4269 *pp
+= 1; /* skip trailing ';' */
4272 /* One's understanding improves, grasshopper... */
4275 static int error_printed
= 0;
4280 "\nWarning: GDB has limited understanding of multiple inheritance...");
4282 fprintf(stderr
, "\n");
4288 /* Make this baseclass visible for structure-printing purposes. */
4289 new = (struct nextfield
*) alloca (sizeof (struct nextfield
));
4292 list
->visibility
= via_public
;
4293 list
->field
.type
= baseclass
;
4294 list
->field
.name
= type_name_no_tag (baseclass
);
4295 list
->field
.bitpos
= offset
;
4296 list
->field
.bitsize
= 0; /* this should be an unpacked field! */
4299 TYPE_N_BASECLASSES (type
) = n_baseclasses
;
4302 /* Now come the fields, as NAME:?TYPENUM,BITPOS,BITSIZE; for each one.
4303 At the end, we see a semicolon instead of a field.
4305 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
4308 The `?' is a placeholder for one of '/2' (public visibility),
4309 '/1' (protected visibility), '/0' (private visibility), or nothing
4310 (C style symbol table, public visibility). */
4312 /* We better set p right now, in case there are no fields at all... */
4317 /* Check for and handle cretinous dbx symbol name continuation! */
4318 if (**pp
== '\\') *pp
= next_symbol_text ();
4320 /* Get space to record the next field's data. */
4321 new = (struct nextfield
*) alloca (sizeof (struct nextfield
));
4325 /* Get the field name. */
4327 if (*p
== CPLUS_MARKER
)
4329 /* Special GNU C++ name. */
4332 char *prefix
, *name
= 0;
4333 struct type
*context
;
4344 error ("invalid abbreviation at symtab pos %d.", symnum
);
4347 context
= read_type (pp
);
4348 if (type_name_no_tag (context
) == 0)
4351 error ("type name unknown at symtab pos %d.", symnum
);
4352 /* FIXME-tiemann: when is `name' ever non-0? */
4353 TYPE_NAME (context
) = obsavestring (name
, p
- name
- 1);
4355 list
->field
.name
= obconcat (prefix
, type_name_no_tag (context
), "");
4358 error ("invalid abbreviation at symtab pos %d.", symnum
);
4359 list
->field
.type
= read_type (pp
);
4360 (*pp
)++; /* Skip the comma. */
4361 list
->field
.bitpos
= read_number (pp
, ';');
4362 /* This field is unpacked. */
4363 list
->field
.bitsize
= 0;
4366 error ("invalid abbreviation at symtab pos %d.", symnum
);
4372 while (*p
!= ':') p
++;
4373 list
->field
.name
= obsavestring (*pp
, p
- *pp
);
4375 /* C++: Check to see if we have hit the methods yet. */
4381 /* This means we have a visibility for a field coming. */
4387 list
->visibility
= 0; /* private */
4392 list
->visibility
= 1; /* protected */
4397 list
->visibility
= 2; /* public */
4402 else /* normal dbx-style format. */
4403 list
->visibility
= 2; /* public */
4405 list
->field
.type
= read_type (pp
);
4408 /* Static class member. */
4409 list
->field
.bitpos
= (long)-1;
4411 while (*p
!= ';') p
++;
4412 list
->field
.bitsize
= (long) savestring (*pp
, p
- *pp
);
4417 else if (**pp
!= ',')
4418 /* Bad structure-type format. */
4419 return error_type (pp
);
4421 (*pp
)++; /* Skip the comma. */
4422 list
->field
.bitpos
= read_number (pp
, ',');
4423 list
->field
.bitsize
= read_number (pp
, ';');
4426 /* FIXME-tiemann: Can't the compiler put out something which
4427 lets us distinguish these? (or maybe just not put out anything
4428 for the field). What is the story here? What does the compiler
4429 really do? Also, patch gdb.texinfo for this case; I document
4430 it as a possible problem there. Search for "DBX-style". */
4432 /* This is wrong because this is identical to the symbols
4433 produced for GCC 0-size arrays. For example:
4438 The code which dumped core in such circumstances should be
4439 fixed not to dump core. */
4441 /* g++ -g0 can put out bitpos & bitsize zero for a static
4442 field. This does not give us any way of getting its
4443 class, so we can't know its name. But we can just
4444 ignore the field so we don't dump core and other nasty
4446 if (list
->field
.bitpos
== 0
4447 && list
->field
.bitsize
== 0)
4449 complain (&dbx_class_complaint
, 0);
4450 /* Ignore this field. */
4456 /* Detect an unpacked field and mark it as such.
4457 dbx gives a bit size for all fields.
4458 Note that forward refs cannot be packed,
4459 and treat enums as if they had the width of ints. */
4460 if (TYPE_CODE (list
->field
.type
) != TYPE_CODE_INT
4461 && TYPE_CODE (list
->field
.type
) != TYPE_CODE_ENUM
)
4462 list
->field
.bitsize
= 0;
4463 if ((list
->field
.bitsize
== 8 * TYPE_LENGTH (list
->field
.type
)
4464 || (TYPE_CODE (list
->field
.type
) == TYPE_CODE_ENUM
4465 && (list
->field
.bitsize
4466 == 8 * TYPE_LENGTH (builtin_type_int
))
4470 list
->field
.bitpos
% 8 == 0)
4471 list
->field
.bitsize
= 0;
4477 /* chill the list of fields: the last entry (at the head)
4478 is a partially constructed entry which we now scrub. */
4481 /* Now create the vector of fields, and record how big it is.
4482 We need this info to record proper virtual function table information
4483 for this class's virtual functions. */
4485 TYPE_NFIELDS (type
) = nfields
;
4486 TYPE_FIELDS (type
) = (struct field
*) obstack_alloc (symbol_obstack
,
4487 sizeof (struct field
) * nfields
);
4489 TYPE_FIELD_PRIVATE_BITS (type
) =
4490 (B_TYPE
*) obstack_alloc (symbol_obstack
, B_BYTES (nfields
));
4491 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
4493 TYPE_FIELD_PROTECTED_BITS (type
) =
4494 (B_TYPE
*) obstack_alloc (symbol_obstack
, B_BYTES (nfields
));
4495 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
4497 /* Copy the saved-up fields into the field vector. */
4499 for (n
= nfields
; list
; list
= list
->next
)
4502 TYPE_FIELD (type
, n
) = list
->field
;
4503 if (list
->visibility
== 0)
4504 SET_TYPE_FIELD_PRIVATE (type
, n
);
4505 else if (list
->visibility
== 1)
4506 SET_TYPE_FIELD_PROTECTED (type
, n
);
4509 /* Now come the method fields, as NAME::methods
4510 where each method is of the form TYPENUM,ARGS,...:PHYSNAME;
4511 At the end, we see a semicolon instead of a field.
4513 For the case of overloaded operators, the format is
4514 OPERATOR::*.methods, where OPERATOR is the string "operator",
4515 `*' holds the place for an operator name (such as `+=')
4516 and `.' marks the end of the operator name. */
4519 /* Now, read in the methods. To simplify matters, we
4520 "unread" the name that has been read, so that we can
4521 start from the top. */
4523 /* For each list of method lists... */
4527 struct next_fnfield
*sublist
= 0;
4529 struct next_fnfieldlist
*new_mainlist
=
4530 (struct next_fnfieldlist
*)alloca (sizeof (struct next_fnfieldlist
));
4535 /* read in the name. */
4536 while (*p
!= ':') p
++;
4537 if ((*pp
)[0] == 'o' && (*pp
)[1] == 'p' && (*pp
)[2] == CPLUS_MARKER
)
4539 /* This lets the user type "break operator+".
4540 We could just put in "+" as the name, but that wouldn't
4542 static char opname
[32] = {'o', 'p', CPLUS_MARKER
};
4543 char *o
= opname
+ 3;
4545 /* Skip past '::'. */
4549 main_fn_name
= savestring (opname
, o
- opname
);
4556 main_fn_name
= savestring (*pp
, p
- *pp
);
4557 /* Skip past '::'. */
4560 new_mainlist
->fn_fieldlist
.name
= main_fn_name
;
4564 struct next_fnfield
*new_sublist
=
4565 (struct next_fnfield
*)alloca (sizeof (struct next_fnfield
));
4567 /* Check for and handle cretinous dbx symbol name continuation! */
4568 if (**pp
== '\\') *pp
= next_symbol_text ();
4570 new_sublist
->fn_field
.type
= read_type (pp
);
4572 /* Invalid symtab info for method. */
4573 return error_type (pp
);
4577 while (*p
!= ';') p
++;
4578 /* If this is just a stub, then we don't have the
4580 new_sublist
->fn_field
.physname
= savestring (*pp
, p
- *pp
);
4582 new_sublist
->visibility
= *(*pp
)++ - '0';
4583 if (**pp
== '\\') *pp
= next_symbol_text ();
4584 /* FIXME-tiemann: need to add const/volatile info
4585 to the methods. For now, just skip the char.
4586 In future, here's what we need to implement:
4588 A for normal functions.
4589 B for `const' member functions.
4590 C for `volatile' member functions.
4591 D for `const volatile' member functions. */
4592 if (**pp
== 'A' || **pp
== 'B' || **pp
== 'C' || **pp
== 'D')
4595 /* This probably just means we're processing a file compiled
4596 with g++ version 1. */
4598 complain(&const_vol_complaint
, **pp
);
4604 /* virtual member function, followed by index. */
4605 /* The sign bit is set to distinguish pointers-to-methods
4606 from virtual function indicies. Since the array is
4607 in words, the quantity must be shifted left by 1
4608 on 16 bit machine, and by 2 on 32 bit machine, forcing
4609 the sign bit out, and usable as a valid index into
4610 the array. Remove the sign bit here. */
4611 new_sublist
->fn_field
.voffset
=
4612 (0x7fffffff & read_number (pp
, ';')) + 1;
4614 if (**pp
== ';' || **pp
== '\0')
4615 /* Must be g++ version 1. */
4616 new_sublist
->fn_field
.fcontext
= 0;
4619 /* Figure out from whence this virtual function came.
4620 It may belong to virtual function table of
4621 one of its baseclasses. */
4622 new_sublist
->fn_field
.fcontext
= read_type (pp
);
4624 return error_type (pp
);
4631 /* static member function. */
4632 new_sublist
->fn_field
.voffset
= VOFFSET_STATIC
;
4636 /* normal member function. */
4637 new_sublist
->fn_field
.voffset
= 0;
4638 new_sublist
->fn_field
.fcontext
= 0;
4642 new_sublist
->next
= sublist
;
4643 sublist
= new_sublist
;
4646 while (**pp
!= ';' && **pp
!= '\0');
4650 new_mainlist
->fn_fieldlist
.fn_fields
=
4651 (struct fn_field
*) obstack_alloc (symbol_obstack
,
4652 sizeof (struct fn_field
) * length
);
4653 TYPE_FN_PRIVATE_BITS (new_mainlist
->fn_fieldlist
) =
4654 (B_TYPE
*) obstack_alloc (symbol_obstack
, B_BYTES (length
));
4655 B_CLRALL (TYPE_FN_PRIVATE_BITS (new_mainlist
->fn_fieldlist
), length
);
4657 TYPE_FN_PROTECTED_BITS (new_mainlist
->fn_fieldlist
) =
4658 (B_TYPE
*) obstack_alloc (symbol_obstack
, B_BYTES (length
));
4659 B_CLRALL (TYPE_FN_PROTECTED_BITS (new_mainlist
->fn_fieldlist
), length
);
4661 for (i
= length
; (i
--, sublist
); sublist
= sublist
->next
)
4663 new_mainlist
->fn_fieldlist
.fn_fields
[i
] = sublist
->fn_field
;
4664 if (sublist
->visibility
== 0)
4665 B_SET (new_mainlist
->fn_fieldlist
.private_fn_field_bits
, i
);
4666 else if (sublist
->visibility
== 1)
4667 B_SET (new_mainlist
->fn_fieldlist
.protected_fn_field_bits
, i
);
4670 new_mainlist
->fn_fieldlist
.length
= length
;
4671 new_mainlist
->next
= mainlist
;
4672 mainlist
= new_mainlist
;
4674 total_length
+= length
;
4676 while (**pp
!= ';');
4681 TYPE_FN_FIELDLISTS (type
) =
4682 (struct fn_fieldlist
*) obstack_alloc (symbol_obstack
,
4683 sizeof (struct fn_fieldlist
) * nfn_fields
);
4685 TYPE_NFN_FIELDS (type
) = nfn_fields
;
4686 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
4690 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); ++i
)
4691 TYPE_NFN_FIELDS_TOTAL (type
) +=
4692 TYPE_NFN_FIELDS_TOTAL (TYPE_BASECLASS (type
, i
));
4695 for (n
= nfn_fields
; mainlist
; mainlist
= mainlist
->next
)
4696 TYPE_FN_FIELDLISTS (type
)[--n
] = mainlist
->fn_fieldlist
;
4705 |= TYPE_FLAG_HAS_CONSTRUCTOR
| TYPE_FLAG_HAS_DESTRUCTOR
;
4708 else if (**pp
== '+')
4710 TYPE_FLAGS (type
) |= TYPE_FLAG_HAS_CONSTRUCTOR
;
4713 else if (**pp
== '-')
4715 TYPE_FLAGS (type
) |= TYPE_FLAG_HAS_DESTRUCTOR
;
4719 /* Read either a '%' or the final ';'. */
4720 if (*(*pp
)++ == '%')
4722 /* Now we must record the virtual function table pointer's
4723 field information. */
4730 while (*p
!= '\0' && *p
!= ';')
4733 /* Premature end of symbol. */
4734 return error_type (pp
);
4736 TYPE_VPTR_BASETYPE (type
) = t
;
4739 if (TYPE_FIELD_NAME (t
, TYPE_N_BASECLASSES (t
)) == 0)
4741 /* FIXME-tiemann: what's this? */
4743 TYPE_VPTR_FIELDNO (type
) = i
= TYPE_N_BASECLASSES (t
);
4748 else for (i
= TYPE_NFIELDS (t
) - 1; i
>= TYPE_N_BASECLASSES (t
); --i
)
4749 if (! strncmp (TYPE_FIELD_NAME (t
, i
), vptr_name
,
4750 sizeof (vptr_name
) -1))
4752 TYPE_VPTR_FIELDNO (type
) = i
;
4756 /* Virtual function table field not found. */
4757 return error_type (pp
);
4760 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
4768 /* Read a definition of an array type,
4769 and create and return a suitable type object.
4770 Also creates a range type which represents the bounds of that
4772 static struct type
*
4773 read_array_type (pp
, type
)
4775 register struct type
*type
;
4777 struct type
*index_type
, *element_type
, *range_type
;
4781 /* Format of an array type:
4782 "ar<index type>;lower;upper;<array_contents_type>". Put code in
4785 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
4786 for these, produce a type like float[][]. */
4788 index_type
= read_type (pp
);
4790 /* Improper format of array type decl. */
4791 return error_type (pp
);
4794 if (!(**pp
>= '0' && **pp
<= '9'))
4799 lower
= read_number (pp
, ';');
4801 if (!(**pp
>= '0' && **pp
<= '9'))
4806 upper
= read_number (pp
, ';');
4808 element_type
= read_type (pp
);
4817 /* Create range type. */
4818 range_type
= (struct type
*) obstack_alloc (symbol_obstack
,
4819 sizeof (struct type
));
4820 TYPE_CODE (range_type
) = TYPE_CODE_RANGE
;
4821 TYPE_TARGET_TYPE (range_type
) = index_type
;
4823 /* This should never be needed. */
4824 TYPE_LENGTH (range_type
) = sizeof (int);
4826 TYPE_NFIELDS (range_type
) = 2;
4827 TYPE_FIELDS (range_type
) =
4828 (struct field
*) obstack_alloc (symbol_obstack
,
4829 2 * sizeof (struct field
));
4830 TYPE_FIELD_BITPOS (range_type
, 0) = lower
;
4831 TYPE_FIELD_BITPOS (range_type
, 1) = upper
;
4834 TYPE_CODE (type
) = TYPE_CODE_ARRAY
;
4835 TYPE_TARGET_TYPE (type
) = element_type
;
4836 TYPE_LENGTH (type
) = (upper
- lower
+ 1) * TYPE_LENGTH (element_type
);
4837 TYPE_NFIELDS (type
) = 1;
4838 TYPE_FIELDS (type
) =
4839 (struct field
*) obstack_alloc (symbol_obstack
,
4840 sizeof (struct field
));
4841 TYPE_FIELD_TYPE (type
, 0) = range_type
;
4847 /* Read a definition of an enumeration type,
4848 and create and return a suitable type object.
4849 Also defines the symbols that represent the values of the type. */
4851 static struct type
*
4852 read_enum_type (pp
, type
)
4854 register struct type
*type
;
4859 register struct symbol
*sym
;
4861 struct pending
**symlist
;
4862 struct pending
*osyms
, *syms
;
4865 if (within_function
)
4866 symlist
= &local_symbols
;
4868 symlist
= &file_symbols
;
4870 o_nsyms
= osyms
? osyms
->nsyms
: 0;
4872 /* Read the value-names and their values.
4873 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
4874 A semicolon or comman instead of a NAME means the end. */
4875 while (**pp
&& **pp
!= ';' && **pp
!= ',')
4877 /* Check for and handle cretinous dbx symbol name continuation! */
4878 if (**pp
== '\\') *pp
= next_symbol_text ();
4881 while (*p
!= ':') p
++;
4882 name
= obsavestring (*pp
, p
- *pp
);
4884 n
= read_number (pp
, ',');
4886 sym
= (struct symbol
*) obstack_alloc (symbol_obstack
, sizeof (struct symbol
));
4887 bzero (sym
, sizeof (struct symbol
));
4888 SYMBOL_NAME (sym
) = name
;
4889 SYMBOL_CLASS (sym
) = LOC_CONST
;
4890 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
4891 SYMBOL_VALUE (sym
) = n
;
4892 add_symbol_to_list (sym
, symlist
);
4897 (*pp
)++; /* Skip the semicolon. */
4899 /* Now fill in the fields of the type-structure. */
4901 TYPE_LENGTH (type
) = sizeof (int);
4902 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
4903 TYPE_NFIELDS (type
) = nsyms
;
4904 TYPE_FIELDS (type
) = (struct field
*) obstack_alloc (symbol_obstack
, sizeof (struct field
) * nsyms
);
4906 /* Find the symbols for the values and put them into the type.
4907 The symbols can be found in the symlist that we put them on
4908 to cause them to be defined. osyms contains the old value
4909 of that symlist; everything up to there was defined by us. */
4910 /* Note that we preserve the order of the enum constants, so
4911 that in something like "enum {FOO, LAST_THING=FOO}" we print
4912 FOO, not LAST_THING. */
4914 for (syms
= *symlist
, n
= 0; syms
; syms
= syms
->next
)
4919 for (; j
< syms
->nsyms
; j
++,n
++)
4921 struct symbol
*sym
= syms
->symbol
[j
];
4922 SYMBOL_TYPE (sym
) = type
;
4923 TYPE_FIELD_NAME (type
, n
) = SYMBOL_NAME (sym
);
4924 TYPE_FIELD_VALUE (type
, n
) = 0;
4925 TYPE_FIELD_BITPOS (type
, n
) = SYMBOL_VALUE (sym
);
4926 TYPE_FIELD_BITSIZE (type
, n
) = 0;
4935 /* Read a number from the string pointed to by *PP.
4936 The value of *PP is advanced over the number.
4937 If END is nonzero, the character that ends the
4938 number must match END, or an error happens;
4939 and that character is skipped if it does match.
4940 If END is zero, *PP is left pointing to that character.
4942 If the number fits in a long, set *VALUE and set *BITS to 0.
4943 If not, set *BITS to be the number of bits in the number.
4945 If encounter garbage, set *BITS to -1. */
4948 read_huge_number (pp
, end
, valu
, bits
)
4968 /* Leading zero means octal. GCC uses this to output values larger
4969 than an int (because that would be hard in decimal). */
4976 while ((c
= *p
++) >= '0' && c
<= ('0' + radix
))
4978 if (n
<= LONG_MAX
/ radix
)
4981 n
+= c
- '0'; /* FIXME this overflows anyway */
4986 /* This depends on large values being output in octal, which is
4993 /* Ignore leading zeroes. */
4997 else if (c
== '2' || c
== '3')
5023 /* Large decimal constants are an error (because it is hard to
5024 count how many bits are in them). */
5030 /* -0x7f is the same as 0x80. So deal with it by adding one to
5031 the number of bits. */
5046 #define MAX_OF_TYPE(t) ((1 << (sizeof (t)*8 - 1)) - 1)
5047 #define MIN_OF_TYPE(t) (-(1 << (sizeof (t)*8 - 1)))
5049 static struct type
*
5050 read_range_type (pp
, typenums
)
5058 struct type
*result_type
;
5060 /* First comes a type we are a subrange of.
5061 In C it is usually 0, 1 or the type being defined. */
5062 read_type_number (pp
, rangenums
);
5063 self_subrange
= (rangenums
[0] == typenums
[0] &&
5064 rangenums
[1] == typenums
[1]);
5066 /* A semicolon should now follow; skip it. */
5070 /* The remaining two operands are usually lower and upper bounds
5071 of the range. But in some special cases they mean something else. */
5072 read_huge_number (pp
, ';', &n2
, &n2bits
);
5073 read_huge_number (pp
, ';', &n3
, &n3bits
);
5075 if (n2bits
== -1 || n3bits
== -1)
5076 return error_type (pp
);
5078 /* If limits are huge, must be large integral type. */
5079 if (n2bits
!= 0 || n3bits
!= 0)
5081 char got_signed
= 0;
5082 char got_unsigned
= 0;
5083 /* Number of bits in the type. */
5086 /* Range from 0 to <large number> is an unsigned large integral type. */
5087 if ((n2bits
== 0 && n2
== 0) && n3bits
!= 0)
5092 /* Range from <large number> to <large number>-1 is a large signed
5094 else if (n2bits
!= 0 && n3bits
!= 0 && n2bits
== n3bits
+ 1)
5100 /* Check for "long long". */
5101 if (got_signed
&& nbits
== TARGET_LONG_LONG_BIT
)
5102 return builtin_type_long_long
;
5103 if (got_unsigned
&& nbits
== TARGET_LONG_LONG_BIT
)
5104 return builtin_type_unsigned_long_long
;
5106 if (got_signed
|| got_unsigned
)
5108 result_type
= (struct type
*) obstack_alloc (symbol_obstack
,
5109 sizeof (struct type
));
5110 bzero (result_type
, sizeof (struct type
));
5111 TYPE_LENGTH (result_type
) = nbits
/ TARGET_CHAR_BIT
;
5112 TYPE_MAIN_VARIANT (result_type
) = result_type
;
5113 TYPE_CODE (result_type
) = TYPE_CODE_INT
;
5115 TYPE_FLAGS (result_type
) |= TYPE_FLAG_UNSIGNED
;
5119 return error_type (pp
);
5122 /* A type defined as a subrange of itself, with bounds both 0, is void. */
5123 if (self_subrange
&& n2
== 0 && n3
== 0)
5124 return builtin_type_void
;
5126 /* If n3 is zero and n2 is not, we want a floating type,
5127 and n2 is the width in bytes.
5129 Fortran programs appear to use this for complex types also,
5130 and they give no way to distinguish between double and single-complex!
5131 We don't have complex types, so we would lose on all fortran files!
5132 So return type `double' for all of those. It won't work right
5133 for the complex values, but at least it makes the file loadable. */
5135 if (n3
== 0 && n2
> 0)
5137 if (n2
== sizeof (float))
5138 return builtin_type_float
;
5139 return builtin_type_double
;
5142 /* If the upper bound is -1, it must really be an unsigned int. */
5144 else if (n2
== 0 && n3
== -1)
5146 if (sizeof (int) == sizeof (long))
5147 return builtin_type_unsigned_int
;
5149 return builtin_type_unsigned_long
;
5152 /* Special case: char is defined (Who knows why) as a subrange of
5153 itself with range 0-127. */
5154 else if (self_subrange
&& n2
== 0 && n3
== 127)
5155 return builtin_type_char
;
5157 /* Assumptions made here: Subrange of self is equivalent to subrange
5160 && (self_subrange
||
5161 *dbx_lookup_type (rangenums
) == builtin_type_int
))
5163 /* an unsigned type */
5165 if (n3
== - sizeof (long long))
5166 return builtin_type_unsigned_long_long
;
5168 if (n3
== (unsigned int)~0L)
5169 return builtin_type_unsigned_int
;
5170 if (n3
== (unsigned long)~0L)
5171 return builtin_type_unsigned_long
;
5172 if (n3
== (unsigned short)~0L)
5173 return builtin_type_unsigned_short
;
5174 if (n3
== (unsigned char)~0L)
5175 return builtin_type_unsigned_char
;
5178 else if (n3
== 0 && n2
== -sizeof (long long))
5179 return builtin_type_long_long
;
5181 else if (n2
== -n3
-1)
5184 if (n3
== (1 << (8 * sizeof (int) - 1)) - 1)
5185 return builtin_type_int
;
5186 if (n3
== (1 << (8 * sizeof (long) - 1)) - 1)
5187 return builtin_type_long
;
5188 if (n3
== (1 << (8 * sizeof (short) - 1)) - 1)
5189 return builtin_type_short
;
5190 if (n3
== (1 << (8 * sizeof (char) - 1)) - 1)
5191 return builtin_type_char
;
5194 /* We have a real range type on our hands. Allocate space and
5195 return a real pointer. */
5197 /* At this point I don't have the faintest idea how to deal with
5198 a self_subrange type; I'm going to assume that this is used
5199 as an idiom, and that all of them are special cases. So . . . */
5201 return error_type (pp
);
5203 result_type
= (struct type
*) obstack_alloc (symbol_obstack
,
5204 sizeof (struct type
));
5205 bzero (result_type
, sizeof (struct type
));
5207 TYPE_TARGET_TYPE (result_type
) = (self_subrange
?
5209 *dbx_lookup_type(rangenums
));
5211 /* We have to figure out how many bytes it takes to hold this
5212 range type. I'm going to assume that anything that is pushing
5213 the bounds of a long was taken care of above. */
5214 if (n2
>= MIN_OF_TYPE(char) && n3
<= MAX_OF_TYPE(char))
5215 TYPE_LENGTH (result_type
) = 1;
5216 else if (n2
>= MIN_OF_TYPE(short) && n3
<= MAX_OF_TYPE(short))
5217 TYPE_LENGTH (result_type
) = sizeof (short);
5218 else if (n2
>= MIN_OF_TYPE(int) && n3
<= MAX_OF_TYPE(int))
5219 TYPE_LENGTH (result_type
) = sizeof (int);
5220 else if (n2
>= MIN_OF_TYPE(long) && n3
<= MAX_OF_TYPE(long))
5221 TYPE_LENGTH (result_type
) = sizeof (long);
5223 /* Ranged type doesn't fit within known sizes. */
5224 return error_type (pp
);
5226 TYPE_LENGTH (result_type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (result_type
));
5227 TYPE_CODE (result_type
) = TYPE_CODE_RANGE
;
5228 TYPE_NFIELDS (result_type
) = 2;
5229 TYPE_FIELDS (result_type
) =
5230 (struct field
*) obstack_alloc (symbol_obstack
,
5231 2 * sizeof (struct field
));
5232 bzero (TYPE_FIELDS (result_type
), 2 * sizeof (struct field
));
5233 TYPE_FIELD_BITPOS (result_type
, 0) = n2
;
5234 TYPE_FIELD_BITPOS (result_type
, 1) = n3
;
5239 /* Read a number from the string pointed to by *PP.
5240 The value of *PP is advanced over the number.
5241 If END is nonzero, the character that ends the
5242 number must match END, or an error happens;
5243 and that character is skipped if it does match.
5244 If END is zero, *PP is left pointing to that character. */
5247 read_number (pp
, end
)
5251 register char *p
= *pp
;
5252 register long n
= 0;
5256 /* Handle an optional leading minus sign. */
5264 /* Read the digits, as far as they go. */
5266 while ((c
= *p
++) >= '0' && c
<= '9')
5274 error ("Invalid symbol data: invalid character \\%03o at symbol pos %d.", c
, symnum
);
5283 /* Read in an argument list. This is a list of types, separated by commas
5284 and terminated with END. Return the list of types read in, or (struct type
5285 **)-1 if there is an error. */
5286 static struct type
**
5291 struct type
*types
[1024], **rval
; /* allow for fns of 1023 parameters */
5297 /* Invalid argument list: no ','. */
5298 return (struct type
**)-1;
5301 /* Check for and handle cretinous dbx symbol name continuation! */
5303 *pp
= next_symbol_text ();
5305 types
[n
++] = read_type (pp
);
5307 *pp
+= 1; /* get past `end' (the ':' character) */
5311 rval
= (struct type
**) xmalloc (2 * sizeof (struct type
*));
5313 else if (TYPE_CODE (types
[n
-1]) != TYPE_CODE_VOID
)
5315 rval
= (struct type
**) xmalloc ((n
+ 1) * sizeof (struct type
*));
5316 bzero (rval
+ n
, sizeof (struct type
*));
5320 rval
= (struct type
**) xmalloc (n
* sizeof (struct type
*));
5322 bcopy (types
, rval
, n
* sizeof (struct type
*));
5326 /* Copy a pending list, used to record the contents of a common
5327 block for later fixup. */
5328 static struct pending
*
5329 copy_pending (beg
, begi
, end
)
5330 struct pending
*beg
, *end
;
5333 struct pending
*new = 0;
5334 struct pending
*next
;
5336 for (next
= beg
; next
!= 0 && (next
!= end
|| begi
< end
->nsyms
);
5337 next
= next
->next
, begi
= 0)
5340 for (j
= begi
; j
< next
->nsyms
; j
++)
5341 add_symbol_to_list (next
->symbol
[j
], &new);
5346 /* Add a common block's start address to the offset of each symbol
5347 declared to be in it (by being between a BCOMM/ECOMM pair that uses
5348 the common block name). */
5351 fix_common_block (sym
, valu
)
5355 struct pending
*next
= (struct pending
*) SYMBOL_NAMESPACE (sym
);
5356 for ( ; next
; next
= next
->next
)
5359 for (j
= next
->nsyms
- 1; j
>= 0; j
--)
5360 SYMBOL_VALUE_ADDRESS (next
->symbol
[j
]) += valu
;
5364 /* Register our willingness to decode symbols for SunOS and a.out and
5365 b.out files handled by BFD... */
5366 static struct sym_fns sunos_sym_fns
= {"sunOs", 6,
5367 dbx_new_init
, dbx_symfile_init
,
5368 dbx_symfile_read
, dbx_symfile_discard
};
5370 static struct sym_fns aout_sym_fns
= {"a.out", 5,
5371 dbx_new_init
, dbx_symfile_init
,
5372 dbx_symfile_read
, dbx_symfile_discard
};
5374 static struct sym_fns bout_sym_fns
= {"b.out", 5,
5375 dbx_new_init
, dbx_symfile_init
,
5376 dbx_symfile_read
, dbx_symfile_discard
};
5379 _initialize_dbxread ()
5381 add_symtab_fns(&sunos_sym_fns
);
5382 add_symtab_fns(&aout_sym_fns
);
5383 add_symtab_fns(&bout_sym_fns
);
5385 undef_types_allocated
= 20;
5386 undef_types_length
= 0;
5387 undef_types
= (struct type
**) xmalloc (undef_types_allocated
*
5388 sizeof (struct type
*));