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