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
167 void (*sym_read_linetable) (void);
169 /* Relocate the contents of a debug section SECTP. The
170 contents are stored in BUF if it is non-NULL, or returned in a
171 malloc'd buffer otherwise. */
173 bfd_byte *(*sym_relocate) (struct objfile *, asection *sectp, bfd_byte *buf);
175 /* Finds the next struct sym_fns. They are allocated and
176 initialized in whatever module implements the functions pointed
177 to; an initializer calls add_symtab_fns to add them to the global
180 struct sym_fns *next;
184 extern struct section_addr_info *
185 build_section_addr_info_from_objfile (const struct objfile *objfile);
187 extern void relative_addr_info_to_section_offsets
188 (struct section_offsets *section_offsets, int num_sections,
189 struct section_addr_info *addrs);
191 extern void addr_info_make_relative (struct section_addr_info *addrs,
194 /* The default version of sym_fns.sym_offsets for readers that don't
195 do anything special. */
197 extern void default_symfile_offsets (struct objfile *objfile,
198 struct section_addr_info *);
200 /* The default version of sym_fns.sym_segments for readers that don't
201 do anything special. */
203 extern struct symfile_segment_data *default_symfile_segments (bfd *abfd);
205 /* The default version of sym_fns.sym_relocate for readers that don't
206 do anything special. */
208 extern bfd_byte *default_symfile_relocate (struct objfile *objfile,
209 asection *sectp, bfd_byte *buf);
211 extern void extend_psymbol_list (struct psymbol_allocation_list *,
214 /* Add any kind of symbol to a psymbol_allocation_list. */
216 /* #include "demangle.h" */
219 struct partial_symbol *add_psymbol_to_list (char *, int, int, domain_enum,
221 struct psymbol_allocation_list *,
223 enum language, struct objfile *);
225 extern void init_psymbol_list (struct objfile *, int);
227 extern void sort_pst_symbols (struct partial_symtab *);
229 extern struct symtab *allocate_symtab (char *, struct objfile *);
231 extern void add_symtab_fns (struct sym_fns *);
233 /* This enum encodes bit-flags passed as ADD_FLAGS parameter to
234 syms_from_objfile, symbol_file_add, etc. */
236 enum symfile_add_flags
238 /* Be chatty about what you are doing. */
239 SYMFILE_VERBOSE = 1 << 1,
241 /* This is the main symbol file (as opposed to symbol file for dynamically
243 SYMFILE_MAINLINE = 1 << 2,
245 /* Do not call breakpoint_re_set when adding this symbol file. */
246 SYMFILE_DEFER_BP_RESET = 1 << 3
249 extern void syms_from_objfile (struct objfile *,
250 struct section_addr_info *,
251 struct section_offsets *, int, int);
253 extern void new_symfile_objfile (struct objfile *, int);
255 extern struct objfile *symbol_file_add (char *, int,
256 struct section_addr_info *, int);
258 extern struct objfile *symbol_file_add_from_bfd (bfd *, int,
259 struct section_addr_info *,
262 extern void symbol_file_add_separate (bfd *, int, struct objfile *);
264 extern char *find_separate_debug_file_by_debuglink (struct objfile *);
266 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
268 extern struct section_addr_info *alloc_section_addr_info (size_t
271 /* Build (allocate and populate) a section_addr_info struct from an
272 existing section table. */
274 extern struct section_addr_info
275 *build_section_addr_info_from_section_table (const struct target_section
277 const struct target_section
280 /* Free all memory allocated by
281 build_section_addr_info_from_section_table. */
283 extern void free_section_addr_info (struct section_addr_info *);
286 extern struct partial_symtab *start_psymtab_common (struct objfile *,
287 struct section_offsets *,
288 const char *, CORE_ADDR,
289 struct partial_symbol **,
290 struct partial_symbol **);
292 /* Make a copy of the string at PTR with SIZE characters in the symbol
293 obstack (and add a null character at the end in the copy). Returns
294 the address of the copy. */
296 extern char *obsavestring (const char *, int, struct obstack *);
298 /* Concatenate strings S1, S2 and S3; return the new string. Space is
299 found in the OBSTACKP */
301 extern char *obconcat (struct obstack *obstackp, const char *, const char *,
306 /* If non-zero, shared library symbols will be added automatically
307 when the inferior is created, new libraries are loaded, or when
308 attaching to the inferior. This is almost always what users will
309 want to have happen; but for very large programs, the startup time
310 will be excessive, and so if this is a problem, the user can clear
311 this flag and then add the shared library symbols as needed. Note
312 that there is a potential for confusion, since if the shared
313 library symbols are not loaded, commands like "info fun" will *not*
314 report all the functions that are actually present. */
316 extern int auto_solib_add;
318 /* For systems that support it, a threshold size in megabytes. If
319 automatically adding a new library's symbol table to those already
320 known to the debugger would cause the total shared library symbol
321 size to exceed this threshhold, then the shlib's symbols are not
322 added. The threshold is ignored if the user explicitly asks for a
323 shlib to be added, such as when using the "sharedlibrary" command. */
325 extern int auto_solib_limit;
329 extern void set_initial_language (void);
331 extern struct partial_symtab *allocate_psymtab (const char *,
334 extern void discard_psymtab (struct partial_symtab *);
336 extern void find_lowest_section (bfd *, asection *, void *);
338 extern bfd *symfile_bfd_open (char *);
340 extern bfd *bfd_open_maybe_remote (const char *);
342 extern int get_section_index (struct objfile *, char *);
344 /* Utility functions for overlay sections: */
345 extern enum overlay_debugging_state
351 extern int overlay_cache_invalid;
353 /* Return the "mapped" overlay section containing the PC. */
354 extern struct obj_section *find_pc_mapped_section (CORE_ADDR);
356 /* Return any overlay section containing the PC (even in its LMA
358 extern struct obj_section *find_pc_overlay (CORE_ADDR);
360 /* Return true if the section is an overlay. */
361 extern int section_is_overlay (struct obj_section *);
363 /* Return true if the overlay section is currently "mapped". */
364 extern int section_is_mapped (struct obj_section *);
366 /* Return true if pc belongs to section's VMA. */
367 extern CORE_ADDR pc_in_mapped_range (CORE_ADDR, struct obj_section *);
369 /* Return true if pc belongs to section's LMA. */
370 extern CORE_ADDR pc_in_unmapped_range (CORE_ADDR, struct obj_section *);
372 /* Map an address from a section's LMA to its VMA. */
373 extern CORE_ADDR overlay_mapped_address (CORE_ADDR, struct obj_section *);
375 /* Map an address from a section's VMA to its LMA. */
376 extern CORE_ADDR overlay_unmapped_address (CORE_ADDR, struct obj_section *);
378 /* Convert an address in an overlay section (force into VMA range). */
379 extern CORE_ADDR symbol_overlayed_address (CORE_ADDR, struct obj_section *);
381 /* Load symbols from a file. */
382 extern void symbol_file_add_main (char *args, int from_tty);
384 /* Clear GDB symbol tables. */
385 extern void symbol_file_clear (int from_tty);
387 /* Default overlay update function. */
388 extern void simple_overlay_update (struct obj_section *);
390 extern bfd_byte *symfile_relocate_debug_section (struct objfile *, asection *,
393 extern int symfile_map_offsets_to_segments (bfd *,
394 struct symfile_segment_data *,
395 struct section_offsets *,
396 int, const CORE_ADDR *);
397 struct symfile_segment_data *get_symfile_segment_data (bfd *abfd);
398 void free_symfile_segment_data (struct symfile_segment_data *data);
400 /* From dwarf2read.c */
402 extern int dwarf2_has_info (struct objfile *);
404 extern void dwarf2_build_psymtabs (struct objfile *);
405 extern void dwarf2_build_frame_info (struct objfile *);
407 void dwarf2_free_objfile (struct objfile *);
409 /* From mdebugread.c */
411 /* Hack to force structures to exist before use in parameter list. */
412 struct ecoff_debug_hack
414 struct ecoff_debug_swap *a;
415 struct ecoff_debug_info *b;
418 extern void mdebug_build_psymtabs (struct objfile *,
419 const struct ecoff_debug_swap *,
420 struct ecoff_debug_info *);
422 extern void elfmdebug_build_psymtabs (struct objfile *,
423 const struct ecoff_debug_swap *,
426 #endif /* !defined(SYMFILE_H) */