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, 2008 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 3 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, see <http://www.gnu.org/licenses/>. */
21 #if !defined (SYMFILE_H)
24 /* This file requires that you first include "bfd.h". */
27 /* Opaque declarations. */
34 /* Partial symbols are stored in the psymbol_cache and pointers to
35 them are kept in a dynamically grown array that is obtained from
36 malloc and grown as necessary via realloc. Each objfile typically
37 has two of these, one for global symbols and one for static
38 symbols. Although this adds a level of indirection for storing or
39 accessing the partial symbols, it allows us to throw away duplicate
40 psymbols and set all pointers to the single saved instance. */
42 struct psymbol_allocation_list
45 /* Pointer to beginning of dynamically allocated array of pointers
46 to partial symbols. The array is dynamically expanded as
47 necessary to accommodate more pointers. */
49 struct partial_symbol
**list
;
51 /* Pointer to next available slot in which to store a pointer to a
54 struct partial_symbol
**next
;
56 /* Number of allocated pointer slots in current dynamic array (not
57 the number of bytes of storage). The "next" pointer will always
58 point somewhere between list[0] and list[size], and when at
59 list[size] the array will be expanded on the next attempt to
65 /* Define an array of addresses to accommodate non-contiguous dynamic
66 loading of modules. This is for use when entering commands, so we
67 can keep track of the section names until we read the file and can
68 map them to bfd sections. This structure is also used by solib.c
69 to communicate the section addresses in shared objects to
70 symbol_file_add (). */
72 struct section_addr_info
74 /* The number of sections for which address information is
77 /* Sections whose names are file format dependent. */
87 /* A table listing the load segments in a symfile, and which segment
88 each BFD section belongs to. */
89 struct symfile_segment_data
91 /* How many segments are present in this file. If there are
92 two, the text segment is the first one and the data segment
96 /* If NUM_SEGMENTS is greater than zero, the original base address
98 CORE_ADDR
*segment_bases
;
100 /* If NUM_SEGMENTS is greater than zero, the memory size of each
102 CORE_ADDR
*segment_sizes
;
104 /* If NUM_SEGMENTS is greater than zero, this is an array of entries
105 recording which segment contains each BFD section.
106 SEGMENT_INFO[I] is S+1 if the I'th BFD section belongs to segment
107 S, or zero if it is not in any segment. */
111 /* Structure to keep track of symbol reading functions for various
112 object file types. */
117 /* BFD flavour that we handle, or (as a special kludge, see
118 xcoffread.c, (enum bfd_flavour)-1 for xcoff). */
120 enum bfd_flavour sym_flavour
;
122 /* Initializes anything that is global to the entire symbol table.
123 It is called during symbol_file_add, when we begin debugging an
124 entirely new program. */
126 void (*sym_new_init
) (struct objfile
*);
128 /* Reads any initial information from a symbol file, and initializes
129 the struct sym_fns SF in preparation for sym_read(). It is
130 called every time we read a symbol file for any reason. */
132 void (*sym_init
) (struct objfile
*);
134 /* sym_read (objfile, mainline) Reads a symbol file into a psymtab
135 (or possibly a symtab). OBJFILE is the objfile struct for the
136 file we are reading. MAINLINE is 1 if this is the main symbol
137 table being read, and 0 if a secondary symbol file (e.g. shared
138 library or dynamically loaded file) is being read. */
140 void (*sym_read
) (struct objfile
*, int);
142 /* Called when we are finished with an objfile. Should do all
143 cleanup that is specific to the object file format for the
144 particular objfile. */
146 void (*sym_finish
) (struct objfile
*);
148 /* This function produces a file-dependent section_offsets
149 structure, allocated in the objfile's storage, and based on the
150 parameter. The parameter is currently a CORE_ADDR (FIXME!) for
151 backward compatibility with the higher levels of GDB. It should
152 probably be changed to a string, where NULL means the default,
153 and others are parsed in a file dependent way. */
155 void (*sym_offsets
) (struct objfile
*, struct section_addr_info
*);
157 /* This function produces a format-independent description of
158 the segments of ABFD. Each segment is a unit of the file
159 which may be relocated independently. */
161 struct symfile_segment_data
*(*sym_segments
) (bfd
*abfd
);
163 /* This function should read the linetable from the objfile when
164 the line table cannot be read while processing the debugging
166 void (*sym_read_linetable
) (void);
168 /* Finds the next struct sym_fns. They are allocated and
169 initialized in whatever module implements the functions pointed
170 to; an initializer calls add_symtab_fns to add them to the global
173 struct sym_fns
*next
;
177 /* The default version of sym_fns.sym_offsets for readers that don't
178 do anything special. */
180 extern void default_symfile_offsets (struct objfile
*objfile
,
181 struct section_addr_info
*);
183 /* The default version of sym_fns.sym_segments for readers that don't
184 do anything special. */
186 extern struct symfile_segment_data
*default_symfile_segments (bfd
*abfd
);
188 extern void extend_psymbol_list (struct psymbol_allocation_list
*,
191 /* Add any kind of symbol to a psymbol_allocation_list. */
193 /* #include "demangle.h" */
196 struct partial_symbol
*add_psymbol_to_list (char *, int, domain_enum
,
198 struct psymbol_allocation_list
*,
200 enum language
, struct objfile
*);
202 extern void init_psymbol_list (struct objfile
*, int);
204 extern void sort_pst_symbols (struct partial_symtab
*);
206 extern struct symtab
*allocate_symtab (char *, struct objfile
*);
208 extern int free_named_symtabs (char *);
210 extern void add_symtab_fns (struct sym_fns
*);
212 extern void syms_from_objfile (struct objfile
*,
213 struct section_addr_info
*,
214 struct section_offsets
*, int, int, int);
216 extern void new_symfile_objfile (struct objfile
*, int, int);
218 extern struct objfile
*symbol_file_add (char *, int,
219 struct section_addr_info
*, int, int);
221 extern struct objfile
*symbol_file_add_from_bfd (bfd
*, int,
222 struct section_addr_info
*,
225 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
227 extern struct section_addr_info
*alloc_section_addr_info (size_t
230 /* Return a freshly allocated copy of ADDRS. The section names, if
231 any, are also freshly allocated copies of those in ADDRS. */
232 extern struct section_addr_info
*(copy_section_addr_info
233 (struct section_addr_info
*addrs
));
235 /* Build (allocate and populate) a section_addr_info struct from an
236 existing section table. */
238 extern struct section_addr_info
239 *build_section_addr_info_from_section_table (const struct section_table
241 const struct section_table
244 /* Free all memory allocated by
245 build_section_addr_info_from_section_table. */
247 extern void free_section_addr_info (struct section_addr_info
*);
250 extern struct partial_symtab
*start_psymtab_common (struct objfile
*,
251 struct section_offsets
*,
253 struct partial_symbol
**,
254 struct partial_symbol
**);
256 /* Make a copy of the string at PTR with SIZE characters in the symbol
257 obstack (and add a null character at the end in the copy). Returns
258 the address of the copy. */
260 extern char *obsavestring (const char *, int, struct obstack
*);
262 /* Concatenate strings S1, S2 and S3; return the new string. Space is
263 found in the OBSTACKP */
265 extern char *obconcat (struct obstack
*obstackp
, const char *, const char *,
270 /* If non-zero, shared library symbols will be added automatically
271 when the inferior is created, new libraries are loaded, or when
272 attaching to the inferior. This is almost always what users will
273 want to have happen; but for very large programs, the startup time
274 will be excessive, and so if this is a problem, the user can clear
275 this flag and then add the shared library symbols as needed. Note
276 that there is a potential for confusion, since if the shared
277 library symbols are not loaded, commands like "info fun" will *not*
278 report all the functions that are actually present. */
280 extern int auto_solib_add
;
282 /* For systems that support it, a threshold size in megabytes. If
283 automatically adding a new library's symbol table to those already
284 known to the debugger would cause the total shared library symbol
285 size to exceed this threshhold, then the shlib's symbols are not
286 added. The threshold is ignored if the user explicitly asks for a
287 shlib to be added, such as when using the "sharedlibrary" command. */
289 extern int auto_solib_limit
;
293 extern void set_initial_language (void);
295 extern struct partial_symtab
*allocate_psymtab (char *, struct objfile
*);
297 extern void discard_psymtab (struct partial_symtab
*);
299 extern void find_lowest_section (bfd
*, asection
*, void *);
301 extern bfd
*symfile_bfd_open (char *);
303 extern int get_section_index (struct objfile
*, char *);
305 /* Utility functions for overlay sections: */
306 extern enum overlay_debugging_state
312 extern int overlay_cache_invalid
;
314 /* Return the "mapped" overlay section containing the PC. */
315 extern asection
*find_pc_mapped_section (CORE_ADDR
);
317 /* Return any overlay section containing the PC (even in its LMA
319 extern asection
*find_pc_overlay (CORE_ADDR
);
321 /* Return true if the section is an overlay. */
322 extern int section_is_overlay (asection
*);
324 /* Return true if the overlay section is currently "mapped". */
325 extern int section_is_mapped (asection
*);
327 /* Return true if pc belongs to section's VMA. */
328 extern CORE_ADDR
pc_in_mapped_range (CORE_ADDR
, asection
*);
330 /* Return true if pc belongs to section's LMA. */
331 extern CORE_ADDR
pc_in_unmapped_range (CORE_ADDR
, asection
*);
333 /* Map an address from a section's LMA to its VMA. */
334 extern CORE_ADDR
overlay_mapped_address (CORE_ADDR
, asection
*);
336 /* Map an address from a section's VMA to its LMA. */
337 extern CORE_ADDR
overlay_unmapped_address (CORE_ADDR
, asection
*);
339 /* Convert an address in an overlay section (force into VMA range). */
340 extern CORE_ADDR
symbol_overlayed_address (CORE_ADDR
, asection
*);
342 /* Load symbols from a file. */
343 extern void symbol_file_add_main (char *args
, int from_tty
);
345 /* Clear GDB symbol tables. */
346 extern void symbol_file_clear (int from_tty
);
348 /* Default overlay update function. */
349 extern void simple_overlay_update (struct obj_section
*);
351 extern bfd_byte
*symfile_relocate_debug_section (bfd
*abfd
, asection
*sectp
,
354 extern int symfile_map_offsets_to_segments (bfd
*,
355 struct symfile_segment_data
*,
356 struct section_offsets
*,
357 int, const CORE_ADDR
*);
358 struct symfile_segment_data
*get_symfile_segment_data (bfd
*abfd
);
359 void free_symfile_segment_data (struct symfile_segment_data
*data
);
361 /* From dwarf2read.c */
363 extern int dwarf2_has_info (struct objfile
*);
365 extern void dwarf2_build_psymtabs (struct objfile
*, int);
366 extern void dwarf2_build_frame_info (struct objfile
*);
368 void dwarf2_free_objfile (struct objfile
*);
370 /* From mdebugread.c */
372 /* Hack to force structures to exist before use in parameter list. */
373 struct ecoff_debug_hack
375 struct ecoff_debug_swap
*a
;
376 struct ecoff_debug_info
*b
;
379 extern void mdebug_build_psymtabs (struct objfile
*,
380 const struct ecoff_debug_swap
*,
381 struct ecoff_debug_info
*);
383 extern void elfmdebug_build_psymtabs (struct objfile
*,
384 const struct ecoff_debug_swap
*,
387 #endif /* !defined(SYMFILE_H) */
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