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,
20 Boston, MA 02111-1307, USA. */
22 #if !defined (SYMFILE_H)
25 /* This file requires that you first include "bfd.h". */
27 /* Partial symbols are stored in the psymbol_cache and pointers to them
28 are kept in a dynamically grown array that is obtained from malloc and
29 grown as necessary via realloc. Each objfile typically has two of these,
30 one for global symbols and one for static symbols. Although this adds
31 a level of indirection for storing or accessing the partial symbols,
32 it allows us to throw away duplicate psymbols and set all pointers
33 to the single saved instance. */
35 struct psymbol_allocation_list
38 /* Pointer to beginning of dynamically allocated array of pointers to
39 partial symbols. The array is dynamically expanded as necessary to
40 accommodate more pointers. */
42 struct partial_symbol **list;
44 /* Pointer to next available slot in which to store a pointer to a partial
47 struct partial_symbol **next;
49 /* Number of allocated pointer slots in current dynamic array (not the
50 number of bytes of storage). The "next" pointer will always point
51 somewhere between list[0] and list[size], and when at list[size] the
52 array will be expanded on the next attempt to store a pointer. */
57 /* Define an array of addresses to accommodate non-contiguous dynamic
58 loading of modules. This is for use when entering commands, so we
59 can keep track of the section names until we read the file and
60 can map them to bfd sections. This structure is also used by
61 solib.c to communicate the section addresses in shared objects to
62 symbol_file_add (). */
64 #define MAX_SECTIONS 40
65 struct section_addr_info
67 /* Sections whose names are always known to gdb. */
71 /* Sections whose names are file format dependant. */
77 } other[MAX_SECTIONS];
80 /* Structure to keep track of symbol reading functions for various
86 /* BFD flavour that we handle, or (as a special kludge, see xcoffread.c,
87 (enum bfd_flavour)-1 for xcoff). */
89 enum bfd_flavour sym_flavour;
91 /* Initializes anything that is global to the entire symbol table. It is
92 called during symbol_file_add, when we begin debugging an entirely new
95 void (*sym_new_init) PARAMS ((struct objfile *));
97 /* Reads any initial information from a symbol file, and initializes the
98 struct sym_fns SF in preparation for sym_read(). It is called every
99 time we read a symbol file for any reason. */
101 void (*sym_init) PARAMS ((struct objfile *));
103 /* sym_read (objfile, mainline)
104 Reads a symbol file into a psymtab (or possibly a symtab).
105 OBJFILE is the objfile struct for the file we are reading.
106 MAINLINE is 1 if this is the
107 main symbol table being read, and 0 if a secondary
108 symbol file (e.g. shared library or dynamically loaded file)
111 void (*sym_read) PARAMS ((struct objfile *, int));
113 /* Called when we are finished with an objfile. Should do all cleanup
114 that is specific to the object file format for the particular objfile. */
116 void (*sym_finish) PARAMS ((struct objfile *));
118 /* This function produces a file-dependent section_offsets structure,
119 allocated in the objfile's storage, and based on the parameter.
120 The parameter is currently a CORE_ADDR (FIXME!) for backward compatibility
121 with the higher levels of GDB. It should probably be changed to
122 a string, where NULL means the default, and others are parsed in a file
125 void (*sym_offsets) PARAMS ((struct objfile *, struct section_addr_info *));
127 /* Finds the next struct sym_fns. They are allocated and initialized
128 in whatever module implements the functions pointed to; an
129 initializer calls add_symtab_fns to add them to the global chain. */
131 struct sym_fns *next;
135 /* The default version of sym_fns.sym_offsets for readers that don't
136 do anything special. */
139 default_symfile_offsets PARAMS ((struct objfile * objfile, struct section_addr_info *));
143 extend_psymbol_list PARAMS ((struct psymbol_allocation_list *,
146 /* Add any kind of symbol to a psymbol_allocation_list. */
148 /* #include "demangle.h" */
151 add_psymbol_to_list PARAMS ((char *, int, namespace_enum, enum address_class,
152 struct psymbol_allocation_list *, long, CORE_ADDR,
153 enum language, struct objfile *));
156 add_psymbol_with_dem_name_to_list PARAMS ((char *, int, char *, int, namespace_enum,
158 struct psymbol_allocation_list *,
160 enum language, struct objfile *));
163 extern void init_psymbol_list PARAMS ((struct objfile *, int));
166 sort_pst_symbols PARAMS ((struct partial_symtab *));
168 extern struct symtab *
169 allocate_symtab PARAMS ((char *, struct objfile *));
172 free_named_symtabs PARAMS ((char *));
175 fill_in_vptr_fieldno PARAMS ((struct type *));
178 add_symtab_fns PARAMS ((struct sym_fns *));
181 init_entry_point_info PARAMS ((struct objfile *));
184 syms_from_objfile PARAMS ((struct objfile *, struct section_addr_info *, int, int));
187 new_symfile_objfile PARAMS ((struct objfile *, int, int));
189 extern struct objfile *
190 symbol_file_add PARAMS ((char *, int, struct section_addr_info *, int, int));
192 /* Build (allocate and populate) a section_addr_info struct from
193 an existing section table. */
195 struct section_table;
196 extern struct section_addr_info *
197 build_section_addr_info_from_section_table (const struct section_table *start,
198 const struct section_table *end);
200 /* Free all memory allocated by build_section_addr_info_from_section_table. */
203 free_section_addr_info (struct section_addr_info *);
206 extern struct partial_symtab *
207 start_psymtab_common PARAMS ((struct objfile *, struct section_offsets *,
209 struct partial_symbol **,
210 struct partial_symbol **));
212 /* Sorting your symbols for fast lookup or alphabetical printing. */
215 sort_block_syms PARAMS ((struct block *));
218 sort_symtab_syms PARAMS ((struct symtab *));
220 /* Make a copy of the string at PTR with SIZE characters in the symbol obstack
221 (and add a null character at the end in the copy).
222 Returns the address of the copy. */
225 obsavestring PARAMS ((char *, int, struct obstack *));
227 /* Concatenate strings S1, S2 and S3; return the new string.
228 Space is found in the symbol_obstack. */
231 obconcat PARAMS ((struct obstack * obstackp, const char *, const char *,
236 /* whether to auto load solibs at startup time: 0/1.
238 On all platforms, 0 means "don't auto load".
240 On HP-UX, > 0 means a threshhold, in megabytes, of symbol table which will
241 be auto loaded. When the cumulative size of solib symbol table exceeds
242 this threshhold, solibs' symbol tables will not be loaded.
244 On other platforms, > 0 means, "always auto load".
247 extern int auto_solib_add;
252 entry_point_address PARAMS ((void));
254 extern struct partial_symtab *
255 allocate_psymtab PARAMS ((char *, struct objfile *));
258 discard_psymtab PARAMS ((struct partial_symtab *));
260 extern void find_lowest_section PARAMS ((bfd *, asection *, PTR));
262 extern bfd *symfile_bfd_open PARAMS ((char *));
264 /* Utility functions for overlay sections: */
265 extern int overlay_debugging;
266 extern int overlay_cache_invalid;
268 /* return the "mapped" overlay section containing the PC */
270 find_pc_mapped_section PARAMS ((CORE_ADDR));
272 /* return any overlay section containing the PC (even in its LMA region) */
274 find_pc_overlay PARAMS ((CORE_ADDR));
276 /* return true if the section is an overlay */
278 section_is_overlay PARAMS ((asection *));
280 /* return true if the overlay section is currently "mapped" */
282 section_is_mapped PARAMS ((asection *));
284 /* return true if pc belongs to section's VMA */
286 pc_in_mapped_range PARAMS ((CORE_ADDR, asection *));
288 /* return true if pc belongs to section's LMA */
290 pc_in_unmapped_range PARAMS ((CORE_ADDR, asection *));
292 /* map an address from a section's LMA to its VMA */
294 overlay_mapped_address PARAMS ((CORE_ADDR, asection *));
296 /* map an address from a section's VMA to its LMA */
298 overlay_unmapped_address PARAMS ((CORE_ADDR, asection *));
300 /* convert an address in an overlay section (force into VMA range) */
302 symbol_overlayed_address PARAMS ((CORE_ADDR, asection *));
304 /* From dwarfread.c */
307 dwarf_build_psymtabs PARAMS ((struct objfile *, int, file_ptr, unsigned int,
308 file_ptr, unsigned int));
310 /* From dwarf2read.c */
312 extern int dwarf2_has_info PARAMS ((bfd * abfd));
314 extern void dwarf2_build_psymtabs PARAMS ((struct objfile *, int));
316 /* From mdebugread.c */
318 /* Hack to force structures to exist before use in parameter list. */
319 struct ecoff_debug_hack
321 struct ecoff_debug_swap *a;
322 struct ecoff_debug_info *b;
325 mdebug_build_psymtabs PARAMS ((struct objfile *,
326 const struct ecoff_debug_swap *,
327 struct ecoff_debug_info *));
330 elfmdebug_build_psymtabs PARAMS ((struct objfile *,
331 const struct ecoff_debug_swap *,
334 #endif /* !defined(SYMFILE_H) */