1 /* Definitions for reading symbol files into GDB.
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2002, 2003, 2004, 2007 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., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
23 #if !defined (SYMFILE_H)
26 /* This file requires that you first include "bfd.h". */
29 /* Opaque declarations. */
36 /* Partial symbols are stored in the psymbol_cache and pointers to
37 them are kept in a dynamically grown array that is obtained from
38 malloc and grown as necessary via realloc. Each objfile typically
39 has two of these, one for global symbols and one for static
40 symbols. Although this adds a level of indirection for storing or
41 accessing the partial symbols, it allows us to throw away duplicate
42 psymbols and set all pointers to the single saved instance. */
44 struct psymbol_allocation_list
47 /* Pointer to beginning of dynamically allocated array of pointers
48 to partial symbols. The array is dynamically expanded as
49 necessary to accommodate more pointers. */
51 struct partial_symbol
**list
;
53 /* Pointer to next available slot in which to store a pointer to a
56 struct partial_symbol
**next
;
58 /* Number of allocated pointer slots in current dynamic array (not
59 the number of bytes of storage). The "next" pointer will always
60 point somewhere between list[0] and list[size], and when at
61 list[size] the array will be expanded on the next attempt to
67 /* Define an array of addresses to accommodate non-contiguous dynamic
68 loading of modules. This is for use when entering commands, so we
69 can keep track of the section names until we read the file and can
70 map them to bfd sections. This structure is also used by solib.c
71 to communicate the section addresses in shared objects to
72 symbol_file_add (). */
74 struct section_addr_info
76 /* The number of sections for which address information is
79 /* Sections whose names are file format dependent. */
88 /* Structure to keep track of symbol reading functions for various
94 /* BFD flavour that we handle, or (as a special kludge, see
95 xcoffread.c, (enum bfd_flavour)-1 for xcoff). */
97 enum bfd_flavour sym_flavour
;
99 /* Initializes anything that is global to the entire symbol table.
100 It is called during symbol_file_add, when we begin debugging an
101 entirely new program. */
103 void (*sym_new_init
) (struct objfile
*);
105 /* Reads any initial information from a symbol file, and initializes
106 the struct sym_fns SF in preparation for sym_read(). It is
107 called every time we read a symbol file for any reason. */
109 void (*sym_init
) (struct objfile
*);
111 /* sym_read (objfile, mainline) Reads a symbol file into a psymtab
112 (or possibly a symtab). OBJFILE is the objfile struct for the
113 file we are reading. MAINLINE is 1 if this is the main symbol
114 table being read, and 0 if a secondary symbol file (e.g. shared
115 library or dynamically loaded file) is being read. */
117 void (*sym_read
) (struct objfile
*, int);
119 /* Called when we are finished with an objfile. Should do all
120 cleanup that is specific to the object file format for the
121 particular objfile. */
123 void (*sym_finish
) (struct objfile
*);
125 /* This function produces a file-dependent section_offsets
126 structure, allocated in the objfile's storage, and based on the
127 parameter. The parameter is currently a CORE_ADDR (FIXME!) for
128 backward compatibility with the higher levels of GDB. It should
129 probably be changed to a string, where NULL means the default,
130 and others are parsed in a file dependent way. */
132 void (*sym_offsets
) (struct objfile
*, struct section_addr_info
*);
134 /* Finds the next struct sym_fns. They are allocated and
135 initialized in whatever module implements the functions pointed
136 to; an initializer calls add_symtab_fns to add them to the global
139 struct sym_fns
*next
;
143 /* The default version of sym_fns.sym_offsets for readers that don't
144 do anything special. */
146 extern void default_symfile_offsets (struct objfile
*objfile
,
147 struct section_addr_info
*);
150 extern void extend_psymbol_list (struct psymbol_allocation_list
*,
153 /* Add any kind of symbol to a psymbol_allocation_list. */
155 /* #include "demangle.h" */
158 struct partial_symbol
*add_psymbol_to_list (char *, int, domain_enum
,
160 struct psymbol_allocation_list
*,
162 enum language
, struct objfile
*);
164 extern void init_psymbol_list (struct objfile
*, int);
166 extern void sort_pst_symbols (struct partial_symtab
*);
168 extern struct symtab
*allocate_symtab (char *, struct objfile
*);
170 extern int free_named_symtabs (char *);
172 extern void fill_in_vptr_fieldno (struct type
*);
174 extern void add_symtab_fns (struct sym_fns
*);
176 extern void syms_from_objfile (struct objfile
*,
177 struct section_addr_info
*,
178 struct section_offsets
*, int, int, int);
180 extern void new_symfile_objfile (struct objfile
*, int, int);
182 extern struct objfile
*symbol_file_add (char *, int,
183 struct section_addr_info
*, int, int);
185 extern struct objfile
*symbol_file_add_from_bfd (bfd
*, int,
186 struct section_addr_info
*,
189 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
191 extern struct section_addr_info
*alloc_section_addr_info (size_t
194 /* Return a freshly allocated copy of ADDRS. The section names, if
195 any, are also freshly allocated copies of those in ADDRS. */
196 extern struct section_addr_info
*(copy_section_addr_info
197 (struct section_addr_info
*addrs
));
199 /* Build (allocate and populate) a section_addr_info struct from an
200 existing section table. */
202 extern struct section_addr_info
203 *build_section_addr_info_from_section_table (const struct section_table
205 const struct section_table
208 /* Free all memory allocated by
209 build_section_addr_info_from_section_table. */
211 extern void free_section_addr_info (struct section_addr_info
*);
214 extern struct partial_symtab
*start_psymtab_common (struct objfile
*,
215 struct section_offsets
*,
217 struct partial_symbol
**,
218 struct partial_symbol
**);
220 /* Make a copy of the string at PTR with SIZE characters in the symbol
221 obstack (and add a null character at the end in the copy). Returns
222 the address of the copy. */
224 extern char *obsavestring (const char *, int, struct obstack
*);
226 /* Concatenate strings S1, S2 and S3; return the new string. Space is
227 found in the OBSTACKP */
229 extern char *obconcat (struct obstack
*obstackp
, const char *, const char *,
234 /* If non-zero, shared library symbols will be added automatically
235 when the inferior is created, new libraries are loaded, or when
236 attaching to the inferior. This is almost always what users will
237 want to have happen; but for very large programs, the startup time
238 will be excessive, and so if this is a problem, the user can clear
239 this flag and then add the shared library symbols as needed. Note
240 that there is a potential for confusion, since if the shared
241 library symbols are not loaded, commands like "info fun" will *not*
242 report all the functions that are actually present. */
244 extern int auto_solib_add
;
246 /* For systems that support it, a threshold size in megabytes. If
247 automatically adding a new library's symbol table to those already
248 known to the debugger would cause the total shared library symbol
249 size to exceed this threshhold, then the shlib's symbols are not
250 added. The threshold is ignored if the user explicitly asks for a
251 shlib to be added, such as when using the "sharedlibrary" command. */
253 extern int auto_solib_limit
;
257 extern struct partial_symtab
*allocate_psymtab (char *, struct objfile
*);
259 extern void discard_psymtab (struct partial_symtab
*);
261 extern void find_lowest_section (bfd
*, asection
*, void *);
263 extern bfd
*symfile_bfd_open (char *);
265 extern int get_section_index (struct objfile
*, char *);
267 /* Utility functions for overlay sections: */
268 extern enum overlay_debugging_state
274 extern int overlay_cache_invalid
;
276 /* Return the "mapped" overlay section containing the PC. */
277 extern asection
*find_pc_mapped_section (CORE_ADDR
);
279 /* Return any overlay section containing the PC (even in its LMA
281 extern asection
*find_pc_overlay (CORE_ADDR
);
283 /* Return true if the section is an overlay. */
284 extern int section_is_overlay (asection
*);
286 /* Return true if the overlay section is currently "mapped". */
287 extern int section_is_mapped (asection
*);
289 /* Return true if pc belongs to section's VMA. */
290 extern CORE_ADDR
pc_in_mapped_range (CORE_ADDR
, asection
*);
292 /* Return true if pc belongs to section's LMA. */
293 extern CORE_ADDR
pc_in_unmapped_range (CORE_ADDR
, asection
*);
295 /* Map an address from a section's LMA to its VMA. */
296 extern CORE_ADDR
overlay_mapped_address (CORE_ADDR
, asection
*);
298 /* Map an address from a section's VMA to its LMA. */
299 extern CORE_ADDR
overlay_unmapped_address (CORE_ADDR
, asection
*);
301 /* Convert an address in an overlay section (force into VMA range). */
302 extern CORE_ADDR
symbol_overlayed_address (CORE_ADDR
, asection
*);
304 /* Load symbols from a file. */
305 extern void symbol_file_add_main (char *args
, int from_tty
);
307 /* Clear GDB symbol tables. */
308 extern void symbol_file_clear (int from_tty
);
310 /* Default overlay update function. */
311 extern void simple_overlay_update (struct obj_section
*);
313 extern bfd_byte
*symfile_relocate_debug_section (bfd
*abfd
, asection
*sectp
,
316 /* From dwarf2read.c */
318 extern int dwarf2_has_info (struct objfile
*);
320 extern void dwarf2_build_psymtabs (struct objfile
*, int);
321 extern void dwarf2_build_frame_info (struct objfile
*);
323 /* From mdebugread.c */
325 /* Hack to force structures to exist before use in parameter list. */
326 struct ecoff_debug_hack
328 struct ecoff_debug_swap
*a
;
329 struct ecoff_debug_info
*b
;
332 extern void mdebug_build_psymtabs (struct objfile
*,
333 const struct ecoff_debug_swap
*,
334 struct ecoff_debug_info
*);
336 extern void elfmdebug_build_psymtabs (struct objfile
*,
337 const struct ecoff_debug_swap
*,
340 #endif /* !defined(SYMFILE_H) */
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