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, 2009, 2010
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #if !defined (SYMFILE_H)
25 /* This file requires that you first include "bfd.h". */
28 /* Opaque declarations. */
29 struct target_section;
35 /* Partial symbols are stored in the psymbol_cache and pointers to
36 them are kept in a dynamically grown array that is obtained from
37 malloc and grown as necessary via realloc. Each objfile typically
38 has two of these, one for global symbols and one for static
39 symbols. Although this adds a level of indirection for storing or
40 accessing the partial symbols, it allows us to throw away duplicate
41 psymbols and set all pointers to the single saved instance. */
43 struct psymbol_allocation_list
46 /* Pointer to beginning of dynamically allocated array of pointers
47 to partial symbols. The array is dynamically expanded as
48 necessary to accommodate more pointers. */
50 struct partial_symbol **list;
52 /* Pointer to next available slot in which to store a pointer to a
55 struct partial_symbol **next;
57 /* Number of allocated pointer slots in current dynamic array (not
58 the number of bytes of storage). The "next" pointer will always
59 point somewhere between list[0] and list[size], and when at
60 list[size] the array will be expanded on the next attempt to
66 /* Define an array of addresses to accommodate non-contiguous dynamic
67 loading of modules. This is for use when entering commands, so we
68 can keep track of the section names until we read the file and can
69 map them to bfd sections. This structure is also used by solib.c
70 to communicate the section addresses in shared objects to
71 symbol_file_add (). */
73 struct section_addr_info
75 /* The number of sections for which address information is
78 /* Sections whose names are file format dependent. */
88 /* A table listing the load segments in a symfile, and which segment
89 each BFD section belongs to. */
90 struct symfile_segment_data
92 /* How many segments are present in this file. If there are
93 two, the text segment is the first one and the data segment
97 /* If NUM_SEGMENTS is greater than zero, the original base address
99 CORE_ADDR *segment_bases;
101 /* If NUM_SEGMENTS is greater than zero, the memory size of each
103 CORE_ADDR *segment_sizes;
105 /* If NUM_SEGMENTS is greater than zero, this is an array of entries
106 recording which segment contains each BFD section.
107 SEGMENT_INFO[I] is S+1 if the I'th BFD section belongs to segment
108 S, or zero if it is not in any segment. */
112 /* Structure to keep track of symbol reading functions for various
113 object file types. */
118 /* BFD flavour that we handle, or (as a special kludge, see
119 xcoffread.c, (enum bfd_flavour)-1 for xcoff). */
121 enum bfd_flavour sym_flavour;
123 /* Initializes anything that is global to the entire symbol table.
124 It is called during symbol_file_add, when we begin debugging an
125 entirely new program. */
127 void (*sym_new_init) (struct objfile *);
129 /* Reads any initial information from a symbol file, and initializes
130 the struct sym_fns SF in preparation for sym_read(). It is
131 called every time we read a symbol file for any reason. */
133 void (*sym_init) (struct objfile *);
135 /* sym_read (objfile, symfile_flags) Reads a symbol file into a psymtab
136 (or possibly a symtab). OBJFILE is the objfile struct for the
137 file we are reading. SYMFILE_FLAGS are the flags passed to
138 symbol_file_add & co. */
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, 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 /* This enum encodes bit-flags passed as ADD_FLAGS parameter to
213 syms_from_objfile, symbol_file_add, etc. */
215 enum symfile_add_flags
217 /* Be chatty about what you are doing. */
218 SYMFILE_VERBOSE = 1 << 1,
220 /* This is the main symbol file (as opposed to symbol file for dynamically
222 SYMFILE_MAINLINE = 1 << 2,
224 /* Do not call breakpoint_re_set when adding this symbol file. */
225 SYMFILE_DEFER_BP_RESET = 1 << 3
228 extern void syms_from_objfile (struct objfile *,
229 struct section_addr_info *,
230 struct section_offsets *, int, int);
232 extern void new_symfile_objfile (struct objfile *, int);
234 extern struct objfile *symbol_file_add (char *, int,
235 struct section_addr_info *, int);
237 extern struct objfile *symbol_file_add_from_bfd (bfd *, int,
238 struct section_addr_info *,
241 extern void symbol_file_add_separate (bfd *, int, struct objfile *);
243 extern char *find_separate_debug_file_by_debuglink (struct objfile *);
245 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
247 extern struct section_addr_info *alloc_section_addr_info (size_t
250 /* Return a freshly allocated copy of ADDRS. The section names, if
251 any, are also freshly allocated copies of those in ADDRS. */
252 extern struct section_addr_info *(copy_section_addr_info
253 (struct section_addr_info *addrs));
255 /* Build (allocate and populate) a section_addr_info struct from an
256 existing section table. */
258 extern struct section_addr_info
259 *build_section_addr_info_from_section_table (const struct target_section
261 const struct target_section
264 /* Free all memory allocated by
265 build_section_addr_info_from_section_table. */
267 extern void free_section_addr_info (struct section_addr_info *);
270 extern struct partial_symtab *start_psymtab_common (struct objfile *,
271 struct section_offsets *,
272 const char *, CORE_ADDR,
273 struct partial_symbol **,
274 struct partial_symbol **);
276 /* Make a copy of the string at PTR with SIZE characters in the symbol
277 obstack (and add a null character at the end in the copy). Returns
278 the address of the copy. */
280 extern char *obsavestring (const char *, int, struct obstack *);
282 /* Concatenate strings S1, S2 and S3; return the new string. Space is
283 found in the OBSTACKP */
285 extern char *obconcat (struct obstack *obstackp, const char *, const char *,
290 /* If non-zero, shared library symbols will be added automatically
291 when the inferior is created, new libraries are loaded, or when
292 attaching to the inferior. This is almost always what users will
293 want to have happen; but for very large programs, the startup time
294 will be excessive, and so if this is a problem, the user can clear
295 this flag and then add the shared library symbols as needed. Note
296 that there is a potential for confusion, since if the shared
297 library symbols are not loaded, commands like "info fun" will *not*
298 report all the functions that are actually present. */
300 extern int auto_solib_add;
302 /* For systems that support it, a threshold size in megabytes. If
303 automatically adding a new library's symbol table to those already
304 known to the debugger would cause the total shared library symbol
305 size to exceed this threshhold, then the shlib's symbols are not
306 added. The threshold is ignored if the user explicitly asks for a
307 shlib to be added, such as when using the "sharedlibrary" command. */
309 extern int auto_solib_limit;
313 extern void set_initial_language (void);
315 extern struct partial_symtab *allocate_psymtab (const char *,
318 extern void discard_psymtab (struct partial_symtab *);
320 extern void find_lowest_section (bfd *, asection *, void *);
322 extern bfd *symfile_bfd_open (char *);
324 extern bfd *bfd_open_maybe_remote (const char *);
326 extern int get_section_index (struct objfile *, char *);
328 /* Utility functions for overlay sections: */
329 extern enum overlay_debugging_state
335 extern int overlay_cache_invalid;
337 /* Return the "mapped" overlay section containing the PC. */
338 extern struct obj_section *find_pc_mapped_section (CORE_ADDR);
340 /* Return any overlay section containing the PC (even in its LMA
342 extern struct obj_section *find_pc_overlay (CORE_ADDR);
344 /* Return true if the section is an overlay. */
345 extern int section_is_overlay (struct obj_section *);
347 /* Return true if the overlay section is currently "mapped". */
348 extern int section_is_mapped (struct obj_section *);
350 /* Return true if pc belongs to section's VMA. */
351 extern CORE_ADDR pc_in_mapped_range (CORE_ADDR, struct obj_section *);
353 /* Return true if pc belongs to section's LMA. */
354 extern CORE_ADDR pc_in_unmapped_range (CORE_ADDR, struct obj_section *);
356 /* Map an address from a section's LMA to its VMA. */
357 extern CORE_ADDR overlay_mapped_address (CORE_ADDR, struct obj_section *);
359 /* Map an address from a section's VMA to its LMA. */
360 extern CORE_ADDR overlay_unmapped_address (CORE_ADDR, struct obj_section *);
362 /* Convert an address in an overlay section (force into VMA range). */
363 extern CORE_ADDR symbol_overlayed_address (CORE_ADDR, struct obj_section *);
365 /* Load symbols from a file. */
366 extern void symbol_file_add_main (char *args, int from_tty);
368 /* Clear GDB symbol tables. */
369 extern void symbol_file_clear (int from_tty);
371 /* Default overlay update function. */
372 extern void simple_overlay_update (struct obj_section *);
374 extern bfd_byte *symfile_relocate_debug_section (bfd *abfd, asection *sectp,
377 extern int symfile_map_offsets_to_segments (bfd *,
378 struct symfile_segment_data *,
379 struct section_offsets *,
380 int, const CORE_ADDR *);
381 struct symfile_segment_data *get_symfile_segment_data (bfd *abfd);
382 void free_symfile_segment_data (struct symfile_segment_data *data);
384 /* From dwarf2read.c */
386 extern int dwarf2_has_info (struct objfile *);
388 extern void dwarf2_build_psymtabs (struct objfile *);
389 extern void dwarf2_build_frame_info (struct objfile *);
391 void dwarf2_free_objfile (struct objfile *);
393 /* From mdebugread.c */
395 /* Hack to force structures to exist before use in parameter list. */
396 struct ecoff_debug_hack
398 struct ecoff_debug_swap *a;
399 struct ecoff_debug_info *b;
402 extern void mdebug_build_psymtabs (struct objfile *,
403 const struct ecoff_debug_swap *,
404 struct ecoff_debug_info *);
406 extern void elfmdebug_build_psymtabs (struct objfile *,
407 const struct ecoff_debug_swap *,
410 #endif /* !defined(SYMFILE_H) */