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 struct symfile_segment_data
90 /* How many segments are present in this file. If there are
91 two, the text segment is the first one and the data segment
95 /* If NUM_SEGMENTS is greater than zero, the original base address
97 CORE_ADDR *segment_bases;
99 /* If NUM_SEGMENTS is greater than zero, the memory size of each
101 CORE_ADDR *segment_sizes;
103 /* If NUM_SEGMENTS is greater than zero, this is an array of entries
104 recording which segment contains each BFD section. It is
105 ordered by section index. A zero means that the section is not
110 /* Structure to keep track of symbol reading functions for various
111 object file types. */
116 /* BFD flavour that we handle, or (as a special kludge, see
117 xcoffread.c, (enum bfd_flavour)-1 for xcoff). */
119 enum bfd_flavour sym_flavour;
121 /* Initializes anything that is global to the entire symbol table.
122 It is called during symbol_file_add, when we begin debugging an
123 entirely new program. */
125 void (*sym_new_init) (struct objfile *);
127 /* Reads any initial information from a symbol file, and initializes
128 the struct sym_fns SF in preparation for sym_read(). It is
129 called every time we read a symbol file for any reason. */
131 void (*sym_init) (struct objfile *);
133 /* sym_read (objfile, mainline) Reads a symbol file into a psymtab
134 (or possibly a symtab). OBJFILE is the objfile struct for the
135 file we are reading. MAINLINE is 1 if this is the main symbol
136 table being read, and 0 if a secondary symbol file (e.g. shared
137 library or dynamically loaded file) is being read. */
139 void (*sym_read) (struct objfile *, int);
141 /* Called when we are finished with an objfile. Should do all
142 cleanup that is specific to the object file format for the
143 particular objfile. */
145 void (*sym_finish) (struct objfile *);
147 /* This function produces a file-dependent section_offsets
148 structure, allocated in the objfile's storage, and based on the
149 parameter. The parameter is currently a CORE_ADDR (FIXME!) for
150 backward compatibility with the higher levels of GDB. It should
151 probably be changed to a string, where NULL means the default,
152 and others are parsed in a file dependent way. */
154 void (*sym_offsets) (struct objfile *, struct section_addr_info *);
156 /* This function produces a format-independent description of
157 the segments of ABFD. Each segment is a unit of the file
158 which may be relocated independently. */
160 struct symfile_segment_data *(*sym_segments) (bfd *abfd);
162 /* Finds the next struct sym_fns. They are allocated and
163 initialized in whatever module implements the functions pointed
164 to; an initializer calls add_symtab_fns to add them to the global
167 struct sym_fns *next;
171 /* The default version of sym_fns.sym_offsets for readers that don't
172 do anything special. */
174 extern void default_symfile_offsets (struct objfile *objfile,
175 struct section_addr_info *);
177 /* The default version of sym_fns.sym_segments for readers that don't
178 do anything special. */
180 extern struct symfile_segment_data *default_symfile_segments (bfd *abfd);
182 extern void extend_psymbol_list (struct psymbol_allocation_list *,
185 /* Add any kind of symbol to a psymbol_allocation_list. */
187 /* #include "demangle.h" */
190 struct partial_symbol *add_psymbol_to_list (char *, int, domain_enum,
192 struct psymbol_allocation_list *,
194 enum language, struct objfile *);
196 extern void init_psymbol_list (struct objfile *, int);
198 extern void sort_pst_symbols (struct partial_symtab *);
200 extern struct symtab *allocate_symtab (char *, struct objfile *);
202 extern int free_named_symtabs (char *);
204 extern void fill_in_vptr_fieldno (struct type *);
206 extern void add_symtab_fns (struct sym_fns *);
208 extern void syms_from_objfile (struct objfile *,
209 struct section_addr_info *,
210 struct section_offsets *, int, int, int);
212 extern void new_symfile_objfile (struct objfile *, int, int);
214 extern struct objfile *symbol_file_add (char *, int,
215 struct section_addr_info *, int, int);
217 extern struct objfile *symbol_file_add_from_bfd (bfd *, int,
218 struct section_addr_info *,
221 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
223 extern struct section_addr_info *alloc_section_addr_info (size_t
226 /* Return a freshly allocated copy of ADDRS. The section names, if
227 any, are also freshly allocated copies of those in ADDRS. */
228 extern struct section_addr_info *(copy_section_addr_info
229 (struct section_addr_info *addrs));
231 /* Build (allocate and populate) a section_addr_info struct from an
232 existing section table. */
234 extern struct section_addr_info
235 *build_section_addr_info_from_section_table (const struct section_table
237 const struct section_table
240 /* Free all memory allocated by
241 build_section_addr_info_from_section_table. */
243 extern void free_section_addr_info (struct section_addr_info *);
246 extern struct partial_symtab *start_psymtab_common (struct objfile *,
247 struct section_offsets *,
249 struct partial_symbol **,
250 struct partial_symbol **);
252 /* Make a copy of the string at PTR with SIZE characters in the symbol
253 obstack (and add a null character at the end in the copy). Returns
254 the address of the copy. */
256 extern char *obsavestring (const char *, int, struct obstack *);
258 /* Concatenate strings S1, S2 and S3; return the new string. Space is
259 found in the OBSTACKP */
261 extern char *obconcat (struct obstack *obstackp, const char *, const char *,
266 /* If non-zero, shared library symbols will be added automatically
267 when the inferior is created, new libraries are loaded, or when
268 attaching to the inferior. This is almost always what users will
269 want to have happen; but for very large programs, the startup time
270 will be excessive, and so if this is a problem, the user can clear
271 this flag and then add the shared library symbols as needed. Note
272 that there is a potential for confusion, since if the shared
273 library symbols are not loaded, commands like "info fun" will *not*
274 report all the functions that are actually present. */
276 extern int auto_solib_add;
278 /* For systems that support it, a threshold size in megabytes. If
279 automatically adding a new library's symbol table to those already
280 known to the debugger would cause the total shared library symbol
281 size to exceed this threshhold, then the shlib's symbols are not
282 added. The threshold is ignored if the user explicitly asks for a
283 shlib to be added, such as when using the "sharedlibrary" command. */
285 extern int auto_solib_limit;
289 extern struct partial_symtab *allocate_psymtab (char *, struct objfile *);
291 extern void discard_psymtab (struct partial_symtab *);
293 extern void find_lowest_section (bfd *, asection *, void *);
295 extern bfd *symfile_bfd_open (char *);
297 extern int get_section_index (struct objfile *, char *);
299 /* Utility functions for overlay sections: */
300 extern enum overlay_debugging_state
306 extern int overlay_cache_invalid;
308 /* Return the "mapped" overlay section containing the PC. */
309 extern asection *find_pc_mapped_section (CORE_ADDR);
311 /* Return any overlay section containing the PC (even in its LMA
313 extern asection *find_pc_overlay (CORE_ADDR);
315 /* Return true if the section is an overlay. */
316 extern int section_is_overlay (asection *);
318 /* Return true if the overlay section is currently "mapped". */
319 extern int section_is_mapped (asection *);
321 /* Return true if pc belongs to section's VMA. */
322 extern CORE_ADDR pc_in_mapped_range (CORE_ADDR, asection *);
324 /* Return true if pc belongs to section's LMA. */
325 extern CORE_ADDR pc_in_unmapped_range (CORE_ADDR, asection *);
327 /* Map an address from a section's LMA to its VMA. */
328 extern CORE_ADDR overlay_mapped_address (CORE_ADDR, asection *);
330 /* Map an address from a section's VMA to its LMA. */
331 extern CORE_ADDR overlay_unmapped_address (CORE_ADDR, asection *);
333 /* Convert an address in an overlay section (force into VMA range). */
334 extern CORE_ADDR symbol_overlayed_address (CORE_ADDR, asection *);
336 /* Load symbols from a file. */
337 extern void symbol_file_add_main (char *args, int from_tty);
339 /* Clear GDB symbol tables. */
340 extern void symbol_file_clear (int from_tty);
342 /* Default overlay update function. */
343 extern void simple_overlay_update (struct obj_section *);
345 extern bfd_byte *symfile_relocate_debug_section (bfd *abfd, asection *sectp,
348 extern int symfile_map_offsets_to_segments (bfd *,
349 struct symfile_segment_data *,
350 struct section_offsets *,
351 int, const CORE_ADDR *);
352 struct symfile_segment_data *get_symfile_segment_data (bfd *abfd);
353 void free_symfile_segment_data (struct symfile_segment_data *data);
355 /* From dwarf2read.c */
357 extern int dwarf2_has_info (struct objfile *);
359 extern void dwarf2_build_psymtabs (struct objfile *, int);
360 extern void dwarf2_build_frame_info (struct objfile *);
362 /* From mdebugread.c */
364 /* Hack to force structures to exist before use in parameter list. */
365 struct ecoff_debug_hack
367 struct ecoff_debug_swap *a;
368 struct ecoff_debug_info *b;
371 extern void mdebug_build_psymtabs (struct objfile *,
372 const struct ecoff_debug_swap *,
373 struct ecoff_debug_info *);
375 extern void elfmdebug_build_psymtabs (struct objfile *,
376 const struct ecoff_debug_swap *,
379 #endif /* !defined(SYMFILE_H) */