1 /* Definitions for reading symbol files into GDB.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
23 #if !defined (SYMFILE_H)
26 /* This file requires that you first include "bfd.h". */
28 /* Partial symbols are stored in the psymbol_cache and pointers to them
29 are kept in a dynamically grown array that is obtained from malloc and
30 grown as necessary via realloc. Each objfile typically has two of these,
31 one for global symbols and one for static symbols. Although this adds
32 a level of indirection for storing or accessing the partial symbols,
33 it allows us to throw away duplicate psymbols and set all pointers
34 to the single saved instance. */
36 struct psymbol_allocation_list
39 /* Pointer to beginning of dynamically allocated array of pointers to
40 partial symbols. The array is dynamically expanded as necessary to
41 accommodate more pointers. */
43 struct partial_symbol
**list
;
45 /* Pointer to next available slot in which to store a pointer to a partial
48 struct partial_symbol
**next
;
50 /* Number of allocated pointer slots in current dynamic array (not the
51 number of bytes of storage). The "next" pointer will always point
52 somewhere between list[0] and list[size], and when at list[size] the
53 array will be expanded on the next attempt to store a pointer. */
58 /* Define an array of addresses to accommodate non-contiguous dynamic
59 loading of modules. This is for use when entering commands, so we
60 can keep track of the section names until we read the file and
61 can map them to bfd sections. This structure is also used by
62 solib.c to communicate the section addresses in shared objects to
63 symbol_file_add (). */
65 #define MAX_SECTIONS 64
66 struct section_addr_info
68 /* Sections whose names are file format dependent. */
74 } other
[MAX_SECTIONS
];
77 /* Structure to keep track of symbol reading functions for various
83 /* BFD flavour that we handle, or (as a special kludge, see xcoffread.c,
84 (enum bfd_flavour)-1 for xcoff). */
86 enum bfd_flavour sym_flavour
;
88 /* Initializes anything that is global to the entire symbol table. It is
89 called during symbol_file_add, when we begin debugging an entirely new
92 void (*sym_new_init
) (struct objfile
*);
94 /* Reads any initial information from a symbol file, and initializes the
95 struct sym_fns SF in preparation for sym_read(). It is called every
96 time we read a symbol file for any reason. */
98 void (*sym_init
) (struct objfile
*);
100 /* sym_read (objfile, mainline)
101 Reads a symbol file into a psymtab (or possibly a symtab).
102 OBJFILE is the objfile struct for the file we are reading.
103 MAINLINE is 1 if this is the
104 main symbol table being read, and 0 if a secondary
105 symbol file (e.g. shared library or dynamically loaded file)
108 void (*sym_read
) (struct objfile
*, int);
110 /* Called when we are finished with an objfile. Should do all cleanup
111 that is specific to the object file format for the particular objfile. */
113 void (*sym_finish
) (struct objfile
*);
115 /* This function produces a file-dependent section_offsets structure,
116 allocated in the objfile's storage, and based on the parameter.
117 The parameter is currently a CORE_ADDR (FIXME!) for backward compatibility
118 with the higher levels of GDB. It should probably be changed to
119 a string, where NULL means the default, and others are parsed in a file
122 void (*sym_offsets
) (struct objfile
*, struct section_addr_info
*);
124 /* Finds the next struct sym_fns. They are allocated and initialized
125 in whatever module implements the functions pointed to; an
126 initializer calls add_symtab_fns to add them to the global chain. */
128 struct sym_fns
*next
;
132 /* The default version of sym_fns.sym_offsets for readers that don't
133 do anything special. */
136 default_symfile_offsets (struct objfile
*objfile
, struct section_addr_info
*);
140 extend_psymbol_list (struct psymbol_allocation_list
*, struct objfile
*);
142 /* Add any kind of symbol to a psymbol_allocation_list. */
144 /* #include "demangle.h" */
147 add_psymbol_to_list (char *, int, namespace_enum
, enum address_class
,
148 struct psymbol_allocation_list
*, long, CORE_ADDR
,
149 enum language
, struct objfile
*);
152 add_psymbol_with_dem_name_to_list (char *, int, char *, int, namespace_enum
,
154 struct psymbol_allocation_list
*,
156 enum language
, struct objfile
*);
159 extern void init_psymbol_list (struct objfile
*, int);
161 extern void sort_pst_symbols (struct partial_symtab
*);
163 extern struct symtab
*allocate_symtab (char *, struct objfile
*);
165 extern int free_named_symtabs (char *);
167 extern void fill_in_vptr_fieldno (struct type
*);
169 extern void add_symtab_fns (struct sym_fns
*);
171 extern void init_entry_point_info (struct objfile
*);
174 syms_from_objfile (struct objfile
*, struct section_addr_info
*, int, int);
176 extern void new_symfile_objfile (struct objfile
*, int, int);
178 extern struct objfile
*symbol_file_add (char *, int,
179 struct section_addr_info
*, int, int);
181 /* Build (allocate and populate) a section_addr_info struct from
182 an existing section table. */
184 struct section_table
;
185 extern struct section_addr_info
*
186 build_section_addr_info_from_section_table (const struct section_table
*start
,
187 const struct section_table
*end
);
189 /* Free all memory allocated by build_section_addr_info_from_section_table. */
192 free_section_addr_info (struct section_addr_info
*);
195 extern struct partial_symtab
*start_psymtab_common (struct objfile
*,
196 struct section_offsets
*,
198 struct partial_symbol
**,
199 struct partial_symbol
**);
201 /* Sorting your symbols for fast lookup or alphabetical printing. */
203 extern void sort_block_syms (struct block
*);
205 extern void sort_symtab_syms (struct symtab
*);
207 /* Make a copy of the string at PTR with SIZE characters in the symbol obstack
208 (and add a null character at the end in the copy).
209 Returns the address of the copy. */
211 extern char *obsavestring (char *, int, struct obstack
*);
213 /* Concatenate strings S1, S2 and S3; return the new string.
214 Space is found in the symbol_obstack. */
216 extern char *obconcat (struct obstack
*obstackp
, const char *, const char *,
221 /* If non-zero, shared library symbols will be added automatically
222 when the inferior is created, new libraries are loaded, or when
223 attaching to the inferior. This is almost always what users will
224 want to have happen; but for very large programs, the startup time
225 will be excessive, and so if this is a problem, the user can clear
226 this flag and then add the shared library symbols as needed. Note
227 that there is a potential for confusion, since if the shared
228 library symbols are not loaded, commands like "info fun" will *not*
229 report all the functions that are actually present. */
231 extern int auto_solib_add
;
233 /* For systems that support it, a threshold size in megabytes. If
234 automatically adding a new library's symbol table to those already
235 known to the debugger would cause the total shared library symbol
236 size to exceed this threshhold, then the shlib's symbols are not
237 added. The threshold is ignored if the user explicitly asks for a
238 shlib to be added, such as when using the "sharedlibrary"
241 extern int auto_solib_limit
;
245 extern CORE_ADDR
entry_point_address (void);
247 extern struct partial_symtab
*allocate_psymtab (char *, struct objfile
*);
249 extern void discard_psymtab (struct partial_symtab
*);
251 extern void find_lowest_section (bfd
*, asection
*, PTR
);
253 extern bfd
*symfile_bfd_open (char *);
255 extern int get_section_index (struct objfile
*, char *);
257 /* Utility functions for overlay sections: */
258 extern enum overlay_debugging_state
{
263 extern int overlay_cache_invalid
;
265 /* return the "mapped" overlay section containing the PC */
266 extern asection
*find_pc_mapped_section (CORE_ADDR
);
268 /* return any overlay section containing the PC (even in its LMA region) */
269 extern asection
*find_pc_overlay (CORE_ADDR
);
271 /* return true if the section is an overlay */
272 extern int section_is_overlay (asection
*);
274 /* return true if the overlay section is currently "mapped" */
275 extern int section_is_mapped (asection
*);
277 /* return true if pc belongs to section's VMA */
278 extern CORE_ADDR
pc_in_mapped_range (CORE_ADDR
, asection
*);
280 /* return true if pc belongs to section's LMA */
281 extern CORE_ADDR
pc_in_unmapped_range (CORE_ADDR
, asection
*);
283 /* map an address from a section's LMA to its VMA */
284 extern CORE_ADDR
overlay_mapped_address (CORE_ADDR
, asection
*);
286 /* map an address from a section's VMA to its LMA */
287 extern CORE_ADDR
overlay_unmapped_address (CORE_ADDR
, asection
*);
289 /* convert an address in an overlay section (force into VMA range) */
290 extern CORE_ADDR
symbol_overlayed_address (CORE_ADDR
, asection
*);
292 /* Load symbols from a file. */
293 extern void symbol_file_add_main (char *args
, int from_tty
);
295 /* Clear GDB symbol tables. */
296 extern void symbol_file_clear (int from_tty
);
298 /* From dwarfread.c */
301 dwarf_build_psymtabs (struct objfile
*, int, file_ptr
, unsigned int,
302 file_ptr
, unsigned int);
304 /* From dwarf2read.c */
306 extern int dwarf2_has_info (bfd
* abfd
);
308 extern void dwarf2_build_psymtabs (struct objfile
*, int);
309 extern void dwarf2_build_frame_info (struct objfile
*);
311 /* From mdebugread.c */
313 /* Hack to force structures to exist before use in parameter list. */
314 struct ecoff_debug_hack
316 struct ecoff_debug_swap
*a
;
317 struct ecoff_debug_info
*b
;
320 mdebug_build_psymtabs (struct objfile
*,
321 const struct ecoff_debug_swap
*,
322 struct ecoff_debug_info
*);
325 elfmdebug_build_psymtabs (struct objfile
*,
326 const struct ecoff_debug_swap
*, asection
*);
328 #endif /* !defined(SYMFILE_H) */
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