1 /* Definitions for reading symbol files into GDB.
2 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1996
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 #if !defined (SYMFILE_H)
24 /* This file requires that you first include "bfd.h". */
26 /* Partial symbols are stored in the psymbol_cache and pointers to them
27 are kept in a dynamically grown array that is obtained from malloc and
28 grown as necessary via realloc. Each objfile typically has two of these,
29 one for global symbols and one for static symbols. Although this adds
30 a level of indirection for storing or accessing the partial symbols,
31 it allows us to throw away duplicate psymbols and set all pointers
32 to the single saved instance. */
34 struct psymbol_allocation_list {
36 /* Pointer to beginning of dynamically allocated array of pointers to
37 partial symbols. The array is dynamically expanded as necessary to
38 accommodate more pointers. */
40 struct partial_symbol **list;
42 /* Pointer to next available slot in which to store a pointer to a partial
45 struct partial_symbol **next;
47 /* Number of allocated pointer slots in current dynamic array (not the
48 number of bytes of storage). The "next" pointer will always point
49 somewhere between list[0] and list[size], and when at list[size] the
50 array will be expanded on the next attempt to store a pointer. */
55 /* Structure to keep track of symbol reading functions for various
60 /* BFD flavour that we handle, or (as a special kludge, see xcoffread.c,
61 (enum bfd_flavour)-1 for xcoff). */
63 enum bfd_flavour sym_flavour;
65 /* Initializes anything that is global to the entire symbol table. It is
66 called during symbol_file_add, when we begin debugging an entirely new
69 void (*sym_new_init) PARAMS ((struct objfile *));
71 /* Reads any initial information from a symbol file, and initializes the
72 struct sym_fns SF in preparation for sym_read(). It is called every
73 time we read a symbol file for any reason. */
75 void (*sym_init) PARAMS ((struct objfile *));
77 /* sym_read (objfile, addr, mainline)
78 Reads a symbol file into a psymtab (or possibly a symtab).
79 OBJFILE is the objfile struct for the file we are reading.
81 are the offset between the file's specified section addresses and
82 their true addresses in memory.
83 MAINLINE is 1 if this is the
84 main symbol table being read, and 0 if a secondary
85 symbol file (e.g. shared library or dynamically loaded file)
88 void (*sym_read) PARAMS ((struct objfile *, struct section_offsets *, int));
90 /* Called when we are finished with an objfile. Should do all cleanup
91 that is specific to the object file format for the particular objfile. */
93 void (*sym_finish) PARAMS ((struct objfile *));
95 /* This function produces a file-dependent section_offsets structure,
96 allocated in the objfile's storage, and based on the parameter.
97 The parameter is currently a CORE_ADDR (FIXME!) for backward compatibility
98 with the higher levels of GDB. It should probably be changed to
99 a string, where NULL means the default, and others are parsed in a file
100 dependent way. The result of this function is handed in to sym_read. */
102 struct section_offsets *(*sym_offsets) PARAMS ((struct objfile *, CORE_ADDR));
104 /* Finds the next struct sym_fns. They are allocated and initialized
105 in whatever module implements the functions pointed to; an
106 initializer calls add_symtab_fns to add them to the global chain. */
108 struct sym_fns *next;
112 /* The default version of sym_fns.sym_offsets for readers that don't
113 do anything special. */
115 extern struct section_offsets *
116 default_symfile_offsets PARAMS ((struct objfile *objfile, CORE_ADDR addr));
120 extend_psymbol_list PARAMS ((struct psymbol_allocation_list *,
123 /* Add any kind of symbol to a psymbol_allocation_list. */
125 /* #include "demangle.h" */
128 add_psymbol_to_list PARAMS ((char *, int, namespace_enum, enum address_class,
129 struct psymbol_allocation_list *, long, CORE_ADDR,
130 enum language, struct objfile *));
133 add_psymbol_with_dem_name_to_list PARAMS ((char *, int, char *, int, namespace_enum,
135 struct psymbol_allocation_list *,
137 enum language, struct objfile *));
140 extern void init_psymbol_list PARAMS ((struct objfile *, int));
143 sort_pst_symbols PARAMS ((struct partial_symtab *));
145 extern struct symtab *
146 allocate_symtab PARAMS ((char *, struct objfile *));
149 free_named_symtabs PARAMS ((char *));
152 fill_in_vptr_fieldno PARAMS ((struct type *));
155 add_symtab_fns PARAMS ((struct sym_fns *));
158 init_entry_point_info PARAMS ((struct objfile *));
161 syms_from_objfile PARAMS ((struct objfile *, CORE_ADDR, int, int));
164 new_symfile_objfile PARAMS ((struct objfile *, int, int));
166 extern struct partial_symtab *
167 start_psymtab_common PARAMS ((struct objfile *, struct section_offsets *,
169 struct partial_symbol **,
170 struct partial_symbol **));
172 /* Sorting your symbols for fast lookup or alphabetical printing. */
175 sort_block_syms PARAMS ((struct block *));
178 sort_symtab_syms PARAMS ((struct symtab *));
180 /* Make a copy of the string at PTR with SIZE characters in the symbol obstack
181 (and add a null character at the end in the copy).
182 Returns the address of the copy. */
185 obsavestring PARAMS ((char *, int, struct obstack *));
187 /* Concatenate strings S1, S2 and S3; return the new string.
188 Space is found in the symbol_obstack. */
191 obconcat PARAMS ((struct obstack *obstackp, const char *, const char *,
196 /* whether to auto load solibs at startup time: 0/1.
198 On all platforms, 0 means "don't auto load".
200 On HP-UX, > 0 means a threshhold, in megabytes, of symbol table which will
201 be auto loaded. When the cumulative size of solib symbol table exceeds
202 this threshhold, solibs' symbol tables will not be loaded.
204 On other platforms, > 0 means, "always auto load".
207 extern int auto_solib_add;
212 entry_point_address PARAMS ((void));
214 extern struct partial_symtab *
215 allocate_psymtab PARAMS ((char *, struct objfile *));
218 discard_psymtab PARAMS ((struct partial_symtab *));
220 extern void find_lowest_section PARAMS ((bfd *, asection *, PTR));
222 extern bfd * symfile_bfd_open PARAMS ((char *));
224 /* Remote targets may wish to use this as their load function. */
225 extern void generic_load PARAMS ((char *name, int from_tty));
227 /* Utility functions for overlay sections: */
228 extern int overlay_debugging;
229 extern int overlay_cache_invalid;
231 /* return the "mapped" overlay section containing the PC */
233 find_pc_mapped_section PARAMS ((CORE_ADDR));
235 /* return any overlay section containing the PC (even in its LMA region) */
237 find_pc_overlay PARAMS ((CORE_ADDR));
239 /* return true if the section is an overlay */
241 section_is_overlay PARAMS ((asection *));
243 /* return true if the overlay section is currently "mapped" */
245 section_is_mapped PARAMS ((asection *));
247 /* return true if pc belongs to section's VMA */
249 pc_in_mapped_range PARAMS ((CORE_ADDR, asection *));
251 /* return true if pc belongs to section's LMA */
253 pc_in_unmapped_range PARAMS ((CORE_ADDR, asection *));
255 /* map an address from a section's LMA to its VMA */
257 overlay_mapped_address PARAMS ((CORE_ADDR, asection *));
259 /* map an address from a section's VMA to its LMA */
261 overlay_unmapped_address PARAMS ((CORE_ADDR, asection *));
263 /* convert an address in an overlay section (force into VMA range) */
265 symbol_overlayed_address PARAMS ((CORE_ADDR, asection *));
267 /* From dwarfread.c */
270 dwarf_build_psymtabs PARAMS ((struct objfile *, struct section_offsets *, int,
271 file_ptr, unsigned int, file_ptr, unsigned int));
273 /* From dwarf2read.c */
275 extern int dwarf2_has_info PARAMS ((bfd *abfd));
277 extern void dwarf2_build_psymtabs PARAMS ((struct objfile *,
278 struct section_offsets *,
280 /* From mdebugread.c */
282 /* Hack to force structures to exist before use in parameter list. */
283 struct ecoff_debug_hack
285 struct ecoff_debug_swap *a;
286 struct ecoff_debug_info *b;
289 mdebug_build_psymtabs PARAMS ((struct objfile *,
290 const struct ecoff_debug_swap *,
291 struct ecoff_debug_info *,
292 struct section_offsets *));
295 elfmdebug_build_psymtabs PARAMS ((struct objfile *,
296 const struct ecoff_debug_swap *,
298 struct section_offsets *));
300 #endif /* !defined(SYMFILE_H) */