1 /* Definitions for reading symbol files into GDB.
2 Copyright (C) 1990, 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 /* This file requires that you first include "bfd.h". */
23 /* Structure for keeping track of object files.
25 One of these is allocated for each object file we access, e.g. the
26 exec_file, symbol_file, and any shared library object files. */
29 /* All struct objfile's are chained together by their next pointers. */
32 /* Each objfile points to a chain of struct symtabs derived from this
33 object file. They are chained by their objfile_chain pointers, and
34 each one points back to this struct objfile. */
35 struct symtab
*symtabs
;
37 /* Ditto for psymtabs. */
38 struct partial_symtab
*psymtabs
;
40 /* The object file's name. Malloc'd; free it if you free this struct. */
43 /* The object file's BFD. Can be null, in which case bfd_open (name) and
44 put the result here. */
47 /* The modification timestamp of the object file, as of the last time
48 we read its symbols. */
53 /* Structure to keep track of symbol reading functions for various
59 is the name, or name prefix, of the BFD "target type" that this
60 set of functions handles. E.g. "a.out" or "sunOs" or "coff" or "elf". */
65 counts how many bytes of sym_name should be checked against the
66 BFD target type of the file being read. If an exact match is
67 desired, specify the number of characters in sym_name plus 1 for the
68 NUL. If a prefix match is desired, specify the number of characters in
74 initializes anything that is global to the entire
75 symbol table. It is called during symbol_file_add, when
76 we begin debugging an entirely new program. */
78 void (*sym_new_init
) ();
81 reads any initial information from a symbol file, and
82 initializes the struct sym_fns SF in preparation for sym_read().
83 It is called every time we read a symbol file for any reason. */
87 /* sym_read (sf, addr, mainline)
88 reads a symbol file into a psymtab (or possibly a symtab).
89 SF is the struct sym_fns that sym_init initialized. ADDR
90 is the offset between the file's specified start address and
91 its true address in memory. MAINLINE is 1 if this is the
92 main symbol table being read, and 0 if a secondary
93 symbol file (e.g. shared library or dynamically loaded file)
99 is the accessor for the symbol file being read. */
104 is where information can be shared among sym_init and sym_read.
105 It is typically a pointer to malloc'd memory. */
107 char *sym_private
; /* Should be void * */
110 finds the next struct sym_fns. They are allocated and initialized
111 in whatever module implements the functions pointed to; an
112 initializer calls add_symtab_fns to add them to the global chain. */
113 struct sym_fns
*next
;
116 is the "struct objfile" for the object file being read. */
117 struct objfile
*objfile
;
120 extern void extend_psymbol_list();
122 /* Add any kind of symbol to a psymbol_allocation_list. */
124 #define ADD_PSYMBOL_VT_TO_LIST(NAME, NAMELENGTH, NAMESPACE, CLASS, LIST, VALUE, VT)\
126 register struct partial_symbol *psym; \
127 if ((LIST).next >= (LIST).list + (LIST).size) \
128 extend_psymbol_list(&(LIST)); \
129 psym = (LIST).next++; \
131 SYMBOL_NAME (psym) = (char *) obstack_alloc (psymbol_obstack, \
133 strncpy (SYMBOL_NAME (psym), (NAME), (NAMELENGTH)); \
134 SYMBOL_NAME (psym)[(NAMELENGTH)] = '\0'; \
135 SYMBOL_NAMESPACE (psym) = (NAMESPACE); \
136 SYMBOL_CLASS (psym) = (CLASS); \
137 VT (psym) = (VALUE); \
142 extern struct symtab
*allocate_symtab ();
143 extern struct objfile
*allocate_objfile ();
144 extern void free_objfile ();
145 extern int free_named_symtabs ();
146 extern void fill_in_vptr_fieldno ();
147 extern void add_symtab_fns ();
148 extern void syms_from_objfile ();
150 /* Functions for dealing with the misc "function" vector, really a misc
151 address<->symbol mapping vector for things we don't have debug symbols
154 extern void init_misc_bunches ();
155 extern void prim_record_misc_function ();
156 extern void discard_misc_bunches ();
157 extern void condense_misc_bunches ();
159 /* Sorting your symbols for fast lookup or alphabetical printing. */
161 extern void sort_block_syms ();
162 extern void sort_symtab_syms ();
163 extern void sort_all_symtab_syms ();
164 extern void sort_block_syms ();
166 /* Make a copy of the string at PTR with SIZE characters in the symbol obstack
167 (and add a null character at the end in the copy).
168 Returns the address of the copy. */
170 extern char *obsavestring ();
172 /* Concatenate strings S1, S2 and S3; return the new string.
173 Space is found in the symbol_obstack. */
175 extern char *obconcat ();
179 /* The object file that the main symbol table was loaded from (e.g. the
180 argument to the "symbol-file" or "file" command). */
182 extern struct objfile
*symfile_objfile
;
184 /* Where execution starts in symfile */
186 CORE_ADDR entry_point
;
188 /* Root of object file struct chain. */
190 struct objfile
*object_files
;
192 /* Vectors of all partial symbols read in from file. */
194 extern struct psymbol_allocation_list
{
195 struct partial_symbol
*list
, *next
;
197 } global_psymbols
, static_psymbols
;
199 /* Support for complaining about things in the symbol file that aren't
202 Each such thing gets a counter. The first time we have the problem,
203 during a symbol read, we report it. At the end of symbol reading,
204 if verbose, we report how many of each problem we had. */
209 struct complaint
*next
;
212 /* Root of the chain of complaints that have at some point been issued.
213 This is used to reset the counters, and/or report the total counts. */
215 extern struct complaint complaint_root
[1];
217 /* Functions that handle complaints. (in symfile.c) */
220 void clear_complaints();
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