1 /* Build symbol tables in GDB's internal format.
2 Copyright (C) 1986-1991 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program 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 2 of the License, or
9 (at your option) any later version.
11 This program 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 this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
20 #if !defined (BUILDSYM_H)
23 /* This module provides definitions used for creating and adding to
24 the symbol table. These routines are called from various symbol-
25 file-reading routines.
27 They originated in dbxread.c of gdb-4.2, and were split out to
28 make xcoffread.c more maintainable by sharing code.
30 Variables declared in this file can be defined by #define-ing
31 the name EXTERN to null. It is used to declare variables that
32 are normally extern, but which get defined in a single module
33 using this technique. */
39 /* Convert stab register number (from `r' declaration) to a gdb REGNUM. */
41 #ifndef STAB_REG_TO_REGNUM
42 #define STAB_REG_TO_REGNUM(VALUE) (VALUE)
45 /* Name of source file whose symbol data we are now processing.
46 This comes from a symbol of type N_SO. */
48 EXTERN
char *last_source_file
;
50 /* Core address of start of text of current source file.
51 This too comes from the N_SO symbol. */
53 EXTERN CORE_ADDR last_source_start_addr
;
55 /* The list of sub-source-files within the current individual compilation.
56 Each file gets its own symtab with its own linetable and associated info,
57 but they all share one blockvector. */
64 struct linetable
*line_vector
;
65 int line_vector_length
;
68 EXTERN
struct subfile
*subfiles
;
70 EXTERN
struct subfile
*current_subfile
;
72 /* Global variable which, when set, indicates that we are processing a
73 .o file compiled with gcc */
75 EXTERN
unsigned char processing_gcc_compilation
;
77 /* Count symbols as they are processed, for error messages. */
79 EXTERN
unsigned int symnum
;
81 /* Vector of types defined so far, indexed by their dbx type numbers.
82 (In newer sun systems, dbx uses a pair of numbers in parens,
83 as in "(SUBFILENUM,NUMWITHINSUBFILE)". Then these numbers must be
84 translated through the type_translations hash table to get
85 the index into the type vector.) */
87 EXTERN
struct type
**type_vector
;
89 /* Number of elements allocated for type_vector currently. */
91 EXTERN
int type_vector_length
;
93 /* Hash table of global symbols whose values are not known yet.
94 They are chained thru the SYMBOL_VALUE_CHAIN, since we don't
95 have the correct data for that slot yet. */
96 /* The use of the LOC_BLOCK code in this chain is nonstandard--
97 it refers to a FORTRAN common block rather than the usual meaning. */
100 EXTERN
struct symbol
*global_sym_chain
[HASHSIZE
];
102 /* Record the symbols defined for each context in a list.
103 We don't create a struct block for the context until we
104 know how long to make it. */
106 #define PENDINGSIZE 100
110 struct pending
*next
;
112 struct symbol
*symbol
[PENDINGSIZE
];
115 /* List of free `struct pending' structures for reuse. */
116 EXTERN
struct pending
*free_pendings
;
118 /* Here are the three lists that symbols are put on. */
120 EXTERN
struct pending
*file_symbols
; /* static at top level, and types */
122 EXTERN
struct pending
*global_symbols
; /* global functions and variables */
124 EXTERN
struct pending
*local_symbols
; /* everything local to lexic context */
126 /* Kludge for xcoffread.c */
127 struct pending_stabs
{
132 EXTERN
struct pending_stabs
*global_stabs
;
134 /* List of symbols declared since the last BCOMM. This list is a tail
135 of local_symbols. When ECOMM is seen, the symbols on the list
136 are noted so their proper addresses can be filled in later,
137 using the common block base address gotten from the assembler
140 EXTERN
struct pending
*common_block
;
141 EXTERN
int common_block_i
;
143 /* Stack representing unclosed lexical contexts
144 (that will become blocks, eventually). */
148 struct pending
*locals
; /* Outer locals at the time we entered */
149 struct pending_block
*old_blocks
; /* Pointer into blocklist as of entry */
150 struct symbol
*name
; /* Name of function, if any, defining context*/
151 CORE_ADDR start_addr
; /* PC where this context starts */
152 CORE_ADDR end_addr
; /* Temp slot for exception handling. */
153 int depth
; /* For error-checking matching push/pop */
156 EXTERN
struct context_stack
*context_stack
;
158 /* Index of first unused entry in context stack. */
159 EXTERN
int context_stack_depth
;
161 /* Currently allocated size of context stack. */
163 EXTERN
int context_stack_size
;
165 /* Macro "function" for popping contexts from the stack. Pushing is done
166 by a real function, push_context. This returns a pointer to a struct
169 #define pop_context() \
170 (&context_stack[--context_stack_depth]);
172 /* Nonzero if within a function (so symbols should be local,
173 if nothing says specifically). */
175 EXTERN
int within_function
;
177 /* List of blocks already made (lexical contexts already closed).
178 This is used at the end to make the blockvector. */
182 struct pending_block
*next
;
186 EXTERN
struct pending_block
*pending_blocks
;
188 extern CORE_ADDR startup_file_start
; /* From blockframe.c */
189 extern CORE_ADDR startup_file_end
; /* From blockframe.c */
191 /* Global variable which, when set, indicates that we are processing a
192 .o file compiled with gcc */
194 EXTERN
unsigned char processing_gcc_compilation
;
196 /* The type code that process_one_symbol saw on its previous invocation.
197 Used to detect pairs of N_SO symbols. */
199 EXTERN
int previous_stab_code
;
201 /* Setup a define to deal cleanly with the underscore problem */
203 #ifdef NAMES_HAVE_UNDERSCORE
204 #define HASH_OFFSET 1
206 #define HASH_OFFSET 0
209 /* Support for Sun changes to dbx symbol format */
211 /* For each identified header file, we have a table of types defined
214 header_files maps header file names to their type tables.
215 It is a vector of n_header_files elements.
216 Each element describes one header file.
217 It contains a vector of types.
219 Sometimes it can happen that the same header file produces
220 different results when included in different places.
221 This can result from conditionals or from different
222 things done before including the file.
223 When this happens, there are multiple entries for the file in this table,
224 one entry for each distinct set of results.
225 The entries are distinguished by the INSTANCE field.
226 The INSTANCE field appears in the N_BINCL and N_EXCL symbol table and is
227 used to match header-file references to their corresponding data. */
231 char *name
; /* Name of header file */
232 int instance
; /* Numeric code distinguishing instances
233 of one header file that produced
234 different results when included.
235 It comes from the N_BINCL or N_EXCL. */
236 struct type
**vector
; /* Pointer to vector of types */
237 int length
; /* Allocated length (# elts) of that vector */
240 EXTERN
struct header_file
*header_files
;
242 EXTERN
int n_header_files
;
244 EXTERN
int n_allocated_header_files
;
246 /* Within each object file, various header files are assigned numbers.
247 A type is defined or referred to with a pair of numbers
248 (FILENUM,TYPENUM) where FILENUM is the number of the header file
249 and TYPENUM is the number within that header file.
250 TYPENUM is the index within the vector of types for that header file.
252 FILENUM == 1 is special; it refers to the main source of the object file,
253 and not to any header file. FILENUM != 1 is interpreted by looking it up
254 in the following table, which contains indices in header_files. */
256 EXTERN
int *this_object_header_files
;
258 EXTERN
int n_this_object_header_files
;
260 EXTERN
int n_allocated_this_object_header_files
;
262 /* When a header file is getting special overriding definitions
263 for one source file, record here the header_files index
264 of its normal definition vector.
265 At other times, this is -1. */
267 EXTERN
int header_file_prev_index
;
271 struct subfile_stack
*next
;
276 EXTERN
struct subfile_stack
*subfile_stack
;
278 extern struct complaint unknown_symtype_complaint
;
280 #define next_symbol_text() (*next_symbol_text_func)()
282 /* Function to invoke get the next symbol. Return the symbol name. */
284 EXTERN
char *(*next_symbol_text_func
) PARAMS ((void));
287 add_symbol_to_list
PARAMS ((struct symbol
*, struct pending
**));
289 extern struct symbol
*
290 find_symbol_in_list
PARAMS ((struct pending
*, char *, int));
293 read_type_number
PARAMS ((char **, int *));
296 read_type
PARAMS ((char **, struct objfile
*));
298 extern struct type
**
299 dbx_lookup_type
PARAMS ((int [2]));
302 read_number
PARAMS ((char **, int));
305 finish_block
PARAMS ((struct symbol
*, struct pending
**,
306 struct pending_block
*, CORE_ADDR
, CORE_ADDR
,
310 add_undefined_type
PARAMS ((struct type
*));
313 really_free_pendings
PARAMS ((int foo
));
316 start_subfile
PARAMS ((char *, char *));
319 push_subfile
PARAMS ((void));
322 pop_subfile
PARAMS ((void));
324 extern struct symtab
*
325 end_symtab
PARAMS ((CORE_ADDR
, int, int,struct objfile
*));
328 scan_file_globals
PARAMS ((struct objfile
*));
331 buildsym_new_init
PARAMS ((void));
334 buildsym_init
PARAMS ((void));
336 extern struct context_stack
*
337 push_context
PARAMS ((int, CORE_ADDR
));
340 record_line
PARAMS ((struct subfile
*, int, CORE_ADDR
));
343 start_symtab
PARAMS ((char *, char *, CORE_ADDR
));
345 extern struct symbol
*
346 define_symbol
PARAMS ((unsigned int, char *, int, int, struct objfile
*));
348 extern struct partial_symtab
*
349 start_psymtab
PARAMS ((struct objfile
*, CORE_ADDR
, char *, CORE_ADDR
, int,
350 struct partial_symbol
*, struct partial_symbol
*));
353 end_psymtab
PARAMS ((struct partial_symtab
*, char **, int, int, CORE_ADDR
,
354 struct partial_symtab
**, int));
357 process_one_symbol
PARAMS ((int, int, CORE_ADDR
, char *, int));
360 hashname
PARAMS ((char *));
362 #endif /* defined (BUILDSYM_H) */